Daniel L Latt

Interests

Teaching

Teaching - Dr. Latt has been active as a teacher in every part of his work. He has utilized a variety different teaching methods, including: informal teaching during clinic, didactic teaching through medical grand rounds and engineering course lectures, and mentorship of students in the lab.Clinical teaching – Dr. Latt has worked with medical students, orthopaedic surgery residents, family medicine residents and emergency medicine residents in both the clinic and in the operating room since starting in practice. Over the past 5 years, he has trained 15 orthopaedic residents and approximately 4 times as many primary care residents on the sports medicine rotation. During these informal teaching sessions he has focused on critical thinking and on the application of basic principles of anatomy and biomechanics to the diagnosis and treatment decision making for musculoskeletal disorders.Didactic teaching – Dr. Latt has also engaged in formal teaching through grand rounds, biomedical engineering lectures, and public colloquia. Over the past 5 years, he has given 15 orthopaedic, rheumatology, and emergency medicine grand rounds lectures covering clinical topics in foot and ankle surgery and sports medicine. He has also given 7 lectures for biomedical engineering undergraduate and graduate students including BME 295C-Challenges in biomedical engineering, BME 497G- clinical topics in biomedical engineering, and BME 566 - biomechanics. Finally, He has given 10 public talks covering a wide variety of topics from ankle arthritis, to overuse injuries in cycling, to training for a career as a clinician-scientist. He has made these lectures engaging and interactive.Research mentorship - Over the past 3 years, he has had the privilege of teaching the students in his lab about research design, research methodology, musculoskeletal anatomy and orthopaedic biomechanics. Over 60 graduate and undergraduate students from biomedical engineering, mechanical engineering, systems and industrial engineering, honors physiology, and nursing students have participated in his lab. He particularly enjoys providing career mentoring for a number of physiology and biomedical engineering undergraduate students who have gone on to medical school. He has on the masters thesis committee for 5 engineering students and on the doctoral dissertation committee for 2 engineering students.

Research

Dr. Latt's research interest is in using the principles of biomechanics to solve clinical problems in orthopaedics. He has four major research areas (1) Degenerative disease of tendons (tendinosis), (2) The role of alignment in the health and disease of the lower extremity, (3) Movement analysis as a functional outcome measure, and (4) Optimization of medical workflow using task analysis and modeling.

Courses

Scholarly Contributions

Chapters

• Latt, D. L. (2015). Complications of Total Ankle Arthroplasty. In The Atlas of Ankle Replacement. London, UK: Imperial College Press.
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  DeOrio JK, Latt LD. Complications of Total Ankle Arthroplasty. The Atlas of Ankle Replacement Cooke P and Goldberg A Editors. London, UK: Imperial College Press. In Press.
• Latt, D. L. (2018). High-Resolution Ultrasound and MRI Imaging of Peroneal Tendon Injuries.. In Peroneal Tendons – A Clinical Guide to Evaluation and Management..
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  Latt LD, Taljanovic MS. High-Resolution Ultrasound and MRI Imaging of Peroneal Tendon Injuries. Peroneal Tendons – A Clinical Guide to Evaluation and Management. Mark Sobel, MD, Editor. Springer Publishing. Manuscript chapter in process.
• Latt, D. L. (2020). Complications of Total Ankle Arthroplasty. In The Atlas of Ankle Replacement. World Scientific.
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  DeOrio JK, Latt LD. The Atlas of Ankle Replacements. Chapter 11: Complications of Total Ankle Replacement. Andrew Goldberg and Paul Cooke, Eds. December 2020, World Scientific Publishing. Pages 301–344.
• Latt, D. L. (2020). High Resolution Ultrasound and MRI Imaging of Peroneal Tendon Injuries. In The Peroneal Tendons – A Clinical Guide to Evaluation and Management.. Springer Publishing.
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  Latt LD, Kuyumcu G, Taljanovic MS. The Peroneal Tendons – A Clinical Guide to Evaluation and Management. Chapter 5: High Resolution Ultrasound and MRI Imaging of Peroneal Tendon Injuries. Mark Sobel, MD, Editor. June 2020, New York, NY: Springer Publishing. Pages 97-124.

Journals/Publications

• Latt, D. L. (2023). Malakoutikhah H, Latt LD. Disease-Specific Finite element Analysis of the Foot and Ankle. Foot Ankle Clin. 2023 Mar;28(1):155-172. doi: 10.1016/j.fcl.2022.10.007. Epub 2023 Jan 2. PMID: 36822685. Foot and Ankle Clinics.
• Latt, D. L. (2018). Gait alterations in posterior tibial tendonitis: a systematic review and meta-analysis". Foot & Ankle International.
• Latt, D. L. (2019). Evaluation and treatment of chronic plantar fasciitis.. Foot & Ankle Orthopaedics., TBD.
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  Latt LD, Jaffe D, Tang Y, Taljanovic M. Evaluation and treatment of chronic plantar fasciitis.” Accepted for publication November 27, 2019 in Foot & Ankle Orthopaedics.
• Latt, D. L. (2019). Peer Reviewed Abstract: Tracking Patient Outcomes Following Foot and Ankle Surgery: The OFAR experience 2018-2019. AOFAS Annual Meeting, September 12-15, 2019, Chicago, IL..
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  Hunt K, Latt LD. Tracking Patient Outcomes Following Foot and Ankle Surgery: The OFAR experience 2018-2019. Abstract submitted and pending acceptance for the AOFAS Annual Meeting, September 12-15, 2019, Chicago, IL.
• Latt, D. L. (2022).

  Estes W, Syal A, Latt LD. Biomechanical Effects of Surgical Reconstruction for Flexible Progressive Collapsing Foot Deformity: A Systematic Review. Foot Ankle Spec. 2022 Dec 13:19386400221139335. doi: 10.1177/19386400221139335. Epub ahead of print. PMID: 36510833.

  . Foot & Ankle Specialist.
• Latt, D. L. (2022). The Contribution of the Ligaments in Progressive Collapsing Foot Deformity: A Comprehensive Computational Study. . Journal of Orthopaedic Research. doi:https://doi.org/10.1002/jor.25244
• Latt, D. L. (2022). The The impact of ligament tears on joint contact mechanics in progressive collapsing foot deformity: A finite element study. . Clinical Biomechanics, 94.
• Latt, D. L. (2022). A Computational Model of Force within the Ligaments and Tendons in Progressive Collapsing Foot Deformity.. Journal of Orthopaedic Research. doi:doi.org/10.1002/jor.25380
• Latt, D. L. (2022). Biomechanical effects of surgical reconstruction for flexible progressive collapsing foot deformity: A systematic review. . Foot & Ankle Specialist. doi:DOI: 10.1177/19386400221139335
• Latt, D. L. (2022). Postural Control Differences between Patients with Posterior Tibial Tendon Dysfunction and Healthy People during Gait.. International Journal of Environmental Research and Public Health, 19(3).
• Latt, D. L. (2022). See attached: The contribution of the ligaments in progressive collapsing foot deformity: A comprehensive computational study. Journal of Orthopaedic Research. doi:DOI: 10.1002/jor.25244
• Latt, D. L., & Latt, D. L. (2022). Postural Control Differences between Patients with Posterior Tibial Tendon Dysfunction and Healthy People during Gait (as part of the Special Issue Advances in Kinesiology and Health. International Journal of Environmental Research and Public Health.
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  From: ijerph@mdpi.comDate: January 24, 2022 at 08:14:28 MSTTo: Jwang@khu.ac.kr, "Latt, Daniel L - (dlatt)" , RDMartin@uams.edu, erinmannen@boisestate.eduCc: billing@mdpi.com, website@mdpi.com, ijerph@mdpi.com, ristov@mdpi.com, isobel.luan@mdpi.comSubject: [EXT][IJERPH] Manuscript ID: ijerph-1556379; doi: 10.3390/ijerph19031301. Paper has been published.Reply-To: isobel.luan@mdpi.com, ijerph@mdpi.comExternal EmailDear Authors,We are pleased to inform you that your article "Postural Control Differences between Patients with Posterior Tibial Tendon Dysfunction and Healthy People during Gait" has been published in IJERPH as part of the Special Issue Advances in Kinesiology and Health and is available online:Abstract: https://www.mdpi.com/1660-4601/19/3/1301PDF Version: https://www.mdpi.com/1660-4601/19/3/1301/pdfThe meta data of your article, the manuscript files and a publication certificate are available here (only available to corresponding authors after login):https://susy.mdpi.com/user/manuscripts/review_info/783055e29f2fe6a8dcfa25010993b7c8Special Issue: https://www.mdpi.com/journal/ijerph/special_issues/Kinesiology_HealthPlease note that this is an early access version. The complete PDF, HTML, and XML versions will be available soon. Please take a moment to check that everything is correct. You can reply to this email if there is a problem. If any errors are noticed, please note that all authors must follow MDPI's policy on updating published papers, found here: https://www.mdpi.com/ethics#16.
• Latt, D. L., Muthukumar, S., Valerdi, R., Monreal, J., Austin, E. T., & Head, L. (2016). Modeling Physician Workflow for Process Improvement. Journal of Enterprise Transformation..
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  Muthukumar SRK, Valerdi R, Latt LD, Monreal J, Head L, Austin ET. Modeling Physician Workflow for Process Improvement.” Manuscript ID#: UJET-2016-0008. Revised and resubmitted September 13, 2016 (original submission February 29, 2016) to Journal of Enterprise Transformation..
• Latt, L. D., Syal, A., & Estes, W. (2022). Biomechanical Effects of Surgical Reconstruction for Flexible Progressive Collapsing Foot Deformity: A Systematic Review. Foot and Ankle Specialist. doi:10.1177/19386400221139335
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  Symptomatic progressive collapsing foot deformity (PCFD) is frequently treated with reconstructive surgery. Multiple studies have documented successful treatment based on improvements in symptoms and physical examination findings. However, it is not well-established whether there are corresponding improvements in gait function following surgical treatment for PCFD.A systematic review of biomechanical outcomes of treatments for flexible PCFD was conducted on PubMed. The 4 articles chosen involved patients with symptomatic flexible PCFD who underwent a reconstructive surgery. Surgical interventions included osteotomy, tendon transfer, and/or ligament repair or reconstruction. Primary outcomes involved objective quantifiable measurements of kinematic, kinetic, or temporospatial parameters.The initial search yielded 605 articles, from which 26 were retained after screening the title and abstract. Twenty-two were eliminated yielding 4 articles. Temporospatial, kinematic, and kinetic parameters were all altered after the patients underwent surgical intervention. Specifically, stride length, cadence, and walking speed all improved postoperatively. Walking kinetics also improved with restoration of normal motion in the frontal and sagittal planes and improvements in the dorsiflexion angle. There were also improvements in sagittal power.Surgical intervention to treat flexible PCFD improves objective biomechanical outcomes; however, more follow-up studies are needed to establish the reliability and durability of these improvements.Level III: Systematic review.
• Turker, T., Latt, D. L., & Reyes, MS3, R. (2018). A cuneiform reformation following gunshot wound to the foot.. Foot & Ankle Orthopaedics Journal.
• Latt, D. L. (2021). Imaging and Treatment of Posttraumatic Ankle and Hindfoot Osteoarthritis. Journal of Clinical Medicine, 10(24), 5848. doi:doi.org/10.3390/jcm10245848
• Latt, D. L. (2021). Mechanical Effects of Lag Screw Retightening in a Simulated Hindfoot Arthrodesis Model.. Foot & Ankle Orthopaedics, 6(2).
• Latt, D. L. (2021). Return to Play Rates in NFL Wide Receivers and Running Backs After ACL Reconstruction: An Updated Analysis. Orthopaedic Journal of Sports Medicine, 9(1). doi:https://doi.org/10.1177/2325967120974743
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• Latt, D. L. (2021). Ultrasound Shear Wave Elastography of the Anterior Talofibular and Calcaneofibular Ligaments in Healthy Subjects. Journal of Ultrasound in Medicine, 21(85), e86-e94. doi:10.15557/JoU.2021.0017
• Latt, L. D., Taljanovic, M. S., Klauser, A., Krupinski, E. A., Zuniga, A. A., Caruso, C., & Gimber, L. H. (2021). Ultrasound shear wave elastography of the anterior talofibular and calcaneofibular ligaments in healthy subjects. Journal of Ultrasonography. doi:10.15557/jou.2021.0017
• Latt, L. D., Alvarez, A., Son, M. M., Johnson, B. W., Requist, M. R., & Rugg, A. L. (2020). Does Lag Screw Retightening Improve Compression in Hindfoot Arthrodesis?. Foot & Ankle Orthopaedics. doi:10.1177/2473011420s00076
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  Category: Hindfoot; Ankle; Ankle Arthritis Introduction/Purpose: Non-union and delayed union are common complications following hindfoot arthrodesis. The failure to obtain and maintain compression at the arthrodesis site may be a causative factor. Partially threaded cannulated ‘lag’ screws are commonly used for fixation in hindfoot arthrodesis; however, the ability of these screws to maintain compression in the hindfoot bones has not been well-characterized. The goals of this work were to: 1) quantify the stress relaxation response of hindfoot bones when compressed with a lag screw, particularly compression change upon screw retightening, and 2) compare the results to prior studies on stress relaxation in direct bone compression. Methods: 12 pairs of calcaneus, talus and tibia bone cylinders, 25mm in diameter, were cut with a keyhole saw from fresh thawed cadaveric feet. The bone cylinders were prepared for simulated arthrodesis by removing the cartilage and flattening the subchondral surface with an oscillating saw. A Futek LTH 300 donut load cell and two metal washers were sandwiched between the two bone cylinders. An 8.0mm partially threaded cannulated lag screw (Smith and Nephew) was placed from the posterior- inferior aspect of the calcaneus cylinder to the anterior-superior aspect of the talus cylinder to simulate subtalar arthrodesis, or from the superior aspect of the tibia cylinder to the inferior aspect of the talus cylinder. Compression was recorded continuously as the screws were tightened by three-quarters of a turn and left untouched for 3 minutes. Recording continued as the screws were retightened one quarter-turn and then left untouched for 30 additional minutes. Results: Both initial and subsequent compression with a lag screw demonstrated a stress relaxation pattern, with increased maximum compression and slowed decay upon retightening. Maximum compression after three quarter-turns and retightening averaged 284 N and 351 N, respectively (n=12; t=-2.55; p=0.0136). Time to decay to 80% of maximum compression after three quarter-turns and retightening averaged 34 and 528 (n=9; t=-2.59; p=0.0159) seconds, respectively, compared to 21 seconds for direct compression. Compression loss 30 minutes after retightening averaged 25.5% (SD=8.8%), compared to 34.3% for direct compression. Conclusion: The maximum compression attained following retightening was significantly greater than the maximum compression attained after initial tightening. The time required to reach 80% of maximum compression was significantly longer after subsequent compared to initial maximum compression. These findings suggest that screw retightening before surgical wound closure may slow compression loss, which could increase the likelihood of successful arthrodesis. Lag screw compression resulted in a lower percent compression loss and loss rate compared to direct compression, which was previously used to describe bone viscoelasticity.
• Latt, L. D., Tang, Y., Taljanovic, M. S., Latt, L. D., & Jaffe, D. E. (2020). Evaluation and Treatment of Chronic Plantar Fasciitis. Foot & Ankle Orthopaedics, 5(1), 247301141989676. doi:10.1177/2473011419896763
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  Plantar fasciitis is the most common cause of chronic heel pain in adults, affecting both young active patients and older sedentary individuals. It results from repetitive stress to the plantar fas...
• Son, M., Rugg, A., Requist, M., Latt, L. D., Johnson, B., & Alvarez, A. (2020). Does Lag Screw Retightening Improve Compression in Hindfoot Arthrodesis. Foot & Ankle Orthopaedics, 5(4), 2473011420S0007. doi:10.1177/2473011420s00076
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  Category:Hindfoot; Ankle; Ankle ArthritisIntroduction/Purpose:Non-union and delayed union are common complications following hindfoot arthrodesis. The failure to obtain and maintain compression at ...
• Son, M., Rugg, A., Requist, M., Latt, L. D., Johnson, B., & Alvarez, A. (2020). Does Lag Screw Retightening Improve Compression in Hindfoot Arthrodesis. Foot & Ankle Orthopaedics, 5(4). doi:10.1177/2473011420s00076
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  Category:Hindfoot; Ankle; Ankle ArthritisIntroduction/Purpose:Non-union and delayed union are common complications following hindfoot arthrodesis. The failure to obtain and maintain compression at ...
• Sorenson, J., Manoharan, A., Latt, L. D., Khwaja, A. M., & Etebari, C. V. (2020). A Staged Treatment Algorithm for the Management of Severe Charcot Hindfoot Arthropathy, using Tibiotalocalcaneal Arthrodesis with Femoral Head Allograft. Foot & Ankle Orthopaedics, 5(4). doi:10.1177/2473011420s00285
• Latt, D. L. (2019). Gait alterations in acquired flatfoot with posterior tibial tendonitis: a systematic review and meta-analysis. Gait Posture, 76, 28-38.
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  Wang J, Siddicky SF, Mannen EM, Lee JM, Latt LD. Gait alterations in acquired flatfoot with posterior tibial tendonitis: a systematic review and meta-analysis. Gait Posture. 2019 Nov 4;76:28-38.
• Latt, D. L. (2019). Peer Reviewed Abstract: Assessing Outcomes with a National Foot and Ankle Outcomes Registry. Western Orthopaedic Association (WOA) 83rd Annual Meeting.
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  Hunt K, Latt LD. Assessing Outcomes with a National Foot and Ankle Outcomes Registry. Abstract. Western Orthopaedic Association (WOA) 83rd Annual Meeting, July 31-Aug 3, 2019, Monterey, CA.
• Latt, D. L. (2019). Surgical Management of Lateral Ankle Instability in Athletes. Journal of Athletic Training, 54(6), 639-649.
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  Camacho LD, Roward ZT, Deng Y, Latt LD. Surgical Management of Lateral Ankle Instability in Athletes. Journal of Athletic Training. 2019 Jun;54(6):639-649.
• Reyes, MS3, R., Latt, D. L., & Turker, T. (2019). A cuneiform reformation following gunshot wound to the foot.. Foot & Ankle Orthopaedics Journal.
• Latt, L. D. (2018). Editor’s Response to “Letter Regarding: A Novel Casting Technique for Tongue-Type Calcaneus Fractures with Soft Tissue Compromise”. Foot & Ankle Orthopaedics, 3(2), 247301141878297. doi:10.1177/2473011418782972
• Latt, L. D., Wild, J. R., Wild, J. R., Morin, M. L., Lawson, K. A., Latt, L. D., & Ayala, A. E. (2018). Ankle Fracture-Dislocations: A Review. Foot & Ankle Orthopaedics, 3(3), 247301141876512. doi:10.1177/2473011418765122
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  Ankle fractures are common musculoskeletal injuries that may result in tibiotalar joint dislocations. Ankle fracture-dislocations occur via similar mechanisms as ankle fractures, although the persi...
• Latt, L. D., Hardy, J. C., Sherman, N. C., Sandberg, R. P., Latt, L. D., & Hardy, J. C. (2017). Cigar Box Arthroscopy: A Randomized Controlled Trial Validates Nonanatomic Simulation Training of Novice Arthroscopy Skills.. Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association, 33(11), 2015-2023.e3. doi:10.1016/j.arthro.2017.04.022
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  The goal of this study was to validate the cigar box arthroscopy trainer (CBAT) as a training tool and then compare its effectiveness to didactic training and to another previously validated low-fidelity but anatomic model, the anatomic knee arthroscopy trainer (AKAT)..A nonanatomic knee arthroscopy training module was developed at our institution. Twenty-four medical students with no prior arthroscopic or laparoscopic experience were enrolled as subjects. Eight subjects served as controls. The remaining 16 subjects were randomized to participate in 4 hours of either the CBAT or a previously validated AKAT. Subjects' skills were assessed by 1 of 2 faculty members through repeated attempts at performing a diagnostic knee arthroscopy on a cadaveric specimen. Objective scores were given using a minimally adapted version of the Basic Arthroscopic Knee Skill Scoring System. Total cost differences were calculated..Seventy-five percent of subjects in the CBAT and AKAT groups succeeded in reaching minimum proficiency in the allotted time compared with 25% in the control group (P < .05). There was no significant difference in the number of attempts to reach proficiency between the CBAT and AKAT groups. The cost to build the CBAT was $44.12, whereas the cost was $324.33 for the AKAT..This pilot study suggests the CBAT is an effective knee arthroscopy trainer that may decrease the learning curve of residents without significant cost to a residency program. This study demonstrates the need for an agreed-upon objective scoring system to properly evaluate residents and compare the effectiveness of different training tools.
• Latt, L. D., Smith, K. E., & Dupont, K. M. (2016). Revision Tibiotalocalcaneal Arthrodesis With a Pseudoelastic Intramedullary Nail: A Case Study. Foot & Ankle Specialist.
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  Hindfoot (tibiotalocalcaneal or TTC) arthrodesis is commonly used to treat concomitant arthritis of the ankle and subtalar joints. Simultaneous fusion of both joints can be difficult to achieve especially in patients with impaired healing due to smoking, diabetes mellitus, or Charcot neuroarthropathy. Conventional intramedullary fixation devices allow for compression to be applied at the time of surgery, but this compression can be lost due to bone resorption or settling, leading to impaired healing. In contrast, the novel pseudoelastic intramedullary nail is designed to maintain compression at the arthrodesis sites throughout the healing process by the use of an internal pseudoelastic element. We present 2 cases of revision TTC arthrodesis using the pseudoelastic intramedullary nail. In the first case, an 80-year-old diabetic man with previous ankle and failed subtalar fusion with screws underwent revision TTC arthrodesis. In the second case, a 66-year-old man with Charcot neuroarthropathy and a failed TTC arthrodesis with a static intramedullary nail underwent revision tibiotalar arthrodesis. In both cases, computed tomography scan demonstrated successful union and patients were allowed full weight bearing by 3 months after surgery. These cases provide early evidence that sustained compression via an intramedullary nail can lead to rapid successful hindfoot fusion when standard approaches have failed.
• Gao, L., Yuan, J. S., Heden, G. J., Szivek, J. A., Taljanovic, M. S., Latt, L. D., & Witte, R. S. (2015). Ultrasound elasticity imaging for determining the mechanical properties of human posterior tibial tendon: a cadaveric study. IEEE Transactions on Biomedical Engineering, 62(4), 1179-84.
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  Posterior tibial tendon dysfunction (PTTD) is a common degenerative condition leading to a severe impairment of gait. There is currently no effective method to determine whether a patient with advanced PTTD would benefit from several months of bracing and physical therapy or ultimately require surgery. Tendon degeneration is closely associated with irreversible degradation of its collagen structure, leading to changes to its mechanical properties. If these properties could be monitored in vivo, they could be used to quantify the severity of tendonosis and help determine the appropriate treatment. The goal of this cadaveric study was, therefore, to develop and validate ultrasound elasticity imaging (UEI) as a potentially noninvasive technique for quantifying tendon mechanical properties. Five human cadaver feet were mounted in a materials testing system (MTS), while the posterior tibial tendon (PTT) was attached to a force actuator. A portable ultrasound scanner collected 2-D data during loading cycles. Young's modulus was calculated from the strain, loading force, and cross-sectional area of the PTT. Average Young's modulus for the five tendons was (0.45 ± 0.16 GPa) using UEI, which was consistent with simultaneous measurements made by the MTS across the whole tendon (0.52 ± 0.18 GPa). We also calculated the scaling factor (0.12 ± 0.01) between the load on the PTT and the inversion force at the forefoot, a measurable quantity in vivo. This study suggests that UEI could be a reliable in vivo technique for estimating the mechanical properties of the PTT, and as a clinical tool, help guide treatment decisions for advanced PTTD and other tendinopathies.
• Latt, D. L. (2015). Advances in Lower Extremity Ultrasound. Current Radiology Reports, 3(6), 1-12.
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  Taljanovic MS, Melville DM, Klauser AS, Latt LD, Arif-Tiwari H, Gao L, Witte RS (2015) Advances in Lower Extremity Ultrasound. Current Radiology Reports. 2015;3(6):1-12
• Latt, D. L. (2015). Chronic plantar fasciitis is mediated by local hemodynamics: implications for emerging therapies.. North American Journal of Medical Sciences, 7(1), 1-5.
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  17. Miller L, Harris R, Latt LD. Chronic plantar fasciitis is mediated by local hemodynamics: implications for emerging therapies. N Am J Med Sci. 2015: 7(1): 1-5.
• Latt, L. D., Glisson, R. R., Adams, S. B., Schuh, R., Narron, J. A., & Easley, M. E. (2015). Biomechanical Comparison of External Fixation and Compression Screws for Transverse Tarsal Joint Arthrodesis. Foot & Ankle International, 36(10), 1235-42.
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  Transverse tarsal joint arthrodesis is commonly performed in the operative treatment of hindfoot arthritis and acquired flatfoot deformity. While fixation is typically achieved using screws, failure to obtain and maintain joint compression sometimes occurs, potentially leading to nonunion. External fixation is an alternate method of achieving arthrodesis site compression and has the advantage of allowing postoperative compression adjustment when necessary. However, its performance relative to standard screw fixation has not been quantified in this application. We hypothesized that external fixation could provide transverse tarsal joint compression exceeding that possible with screw fixation.
• Taljanovic, M. S., Alcala, J. N., Gimber, L. H., Rieke, J. D., Chilvers, M. M., & Latt, L. D. (2015). High-resolution US and MR imaging of peroneal tendon injuries--erratum. Radiographics : a review publication of the Radiological Society of North America, Inc, 35(2), 651.
• Taljanovic, M. S., Latt, L. D., Witte, R. S., Szivek, J. A., Heden, G. J., Yuan, J., & Gao, L. (2015). Ultrasound Elasticity Imaging for Determining the Mechanical Properties of Human Posterior Tibial Tendon: A Cadaveric Study. IEEE Transactions on Biomedical Engineering. doi:10.1109/tbme.2014.2381002
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  Posterior tibial tendon dysfunction (PTTD) is a common degenerative condition leading to a severe impairment of gait. There is currently no effective method to determine whether a patient with advanced PTTD would benefit from several months of bracing and physical therapy or ultimately require surgery. Tendon degeneration is closely associated with irreversible degradation of its collagen structure, leading to changes to its mechanical properties. If these properties could be monitored in vivo, they could be used to quantify the severity of tendonosis and help determine the appropriate treatment. The goal of this cadaveric study was, therefore, to develop and validate ultrasound elasticity imaging (UEI) as a potentially noninvasive technique for quantifying tendon mechanical properties. Five human cadaver feet were mounted in a materials testing system (MTS), while the posterior tibial tendon (PTT) was attached to a force actuator. A portable ultrasound scanner collected 2-D data during loading cycles. Young's modulus was calculated from the strain, loading force, and cross-sectional area of the PTT. Average Young's modulus for the five tendons was (0.45 ± 0.16 GPa) using UEI, which was consistent with simultaneous measurements made by the MTS across the whole tendon (0.52 ± 0.18 GPa). We also calculated the scaling factor (0.12 ± 0.01) between the load on the PTT and the inversion force at the forefoot, a measurable quantity in vivo. This study suggests that UEI could be a reliable in vivo technique for estimating the mechanical properties of the PTT, and as a clinical tool, help guide treatment decisions for advanced PTTD and other tendinopathies.
• Hepworth, J. T., Najafi, B., Latt, L. D., Taylor-piliae, R. E., Latt, L. D., Hoke, T. M., & Coull, B. M. (2014). Abstract P428: Effects of Tai Chi on Physical Function and Quality of Life in Chronic Stroke. Circulation, 129(suppl_1). doi:10.1161/circ.129.suppl_1.p428
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  Background: Poor physical function and quality of life are ubiquitous post-stroke. Effective interventions to improve physical function and quality of life for stroke survivors are critically needed. Objective: Examine the effect of a Tai Chi (TC) intervention on physical function and quality of life. Methods: In a single-blind randomized clinical trial community-dwelling stroke survivors, aged ≥ 50 years and ≥ 3 months post-stroke, were assigned to: Yang style 24-posture TC (n=53), SilverSneakers® (SS, n=44) strength and range of movement exercise, or Usual Care (UC, n=48) for 12 weeks. TC and SS attended a 1-hour class 3 times/week, while UC had weekly phone calls. Standardized measures for Physical Function were the Short Physical Performance Battery (SPPB), Fall Rates and 2-Minute StepTest; and for Quality of Life were the Medical Outcomes Study SF-36, Center for Epidemiological Studies Depression and Pittsburgh Sleep Quality Index. Results: A total of 145 stroke survivors (47% women, mean age=70 year...
• Latt, L. D., Fithian, D. C., Serack, B. J., Dezfuli, B., Burk, D. R., Nicolini, A., & Christopher, M. (2014). A validated cadaveric model of trochlear dysplasia. Knee Surgery, Sports Traumatology, Arthroscopy. doi:10.1007/s00167-014-3033-2
• Latt, L. D., Hepworth, J. T., Taylor-piliae, R. E., Najafi, B., Latt, L. D., Hoke, T. M., & Coull, B. M. (2014). Effect of Tai Chi on physical function, fall rates and quality of life among older stroke survivors.. Archives of physical medicine and rehabilitation, 95(5), 816-24. doi:10.1016/j.apmr.2014.01.001
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  To examine the effect of a 12-week Tai Chi (TC) intervention on physical function and quality of life..Single-blind, randomized controlled trial..General community..Community-dwelling survivors of stroke (N=145; 47% women; mean age, 70y; time poststroke: 3y; ischemic stroke: 66%; hemiparesis: 73%) who were aged ≥50 years and were ≥3 months poststroke..Yang style 24-posture short-form TC (n=53), strength and range of movement exercises (SS) (n=44), or usual care (UC) (n=48) for 12 weeks. The TC and SS groups attended a 1-hour class 3 times per week, whereas the UC group had weekly phone calls..Physical function: Short Physical Performance Battery, fall rates, and 2-minute step test; quality of life: Medical Outcomes Study 36-Item Short-Form Health Survey, Center for Epidemiologic Studies Depression Scale, and Pittsburgh Sleep Quality Index..During the intervention, TC participants had two thirds fewer falls (5 falls) than the SS (14 falls) and UC (15 falls) groups (χ(2)=5.6, P=.06). There was a significant group by time interaction for the 2-minute step test (F2,142=4.69, P
• Valerdi, R., Latt, L. D., Valerdi, R., Monreal, J., & Latt, L. D. (2014). A Systems Approach to Healthcare Efficiency Improvement. Procedia Computer Science, 28, 610-618. doi:10.1016/j.procs.2014.03.074
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  Abstract Healthcare patient outcomes and healthcare costs, in the context of the healthcare delivery system, is a prominent societal issue for the U.S. Although improvements have been achieved, they are silo-centric, specific to a single area or discipline. It is clear that improvements need to be transferred across the healthcare delivery system in a broader sense. To that end, the ability to measure a change in the system is paramount in determining progress and in what parts of the system are impacted. The research work presented describes a case of how an Electronic Medical Record (EMR) system implementation can be measured within a systems or systems engineering context. In the first phase, time motion study has been employed to assess physician workflow. In this manner, data collection, analysis, and inferences elicited can be quickly assessed by subject matter experts for effectiveness. The objective of this collaborative work is that it demonstrates a systems engineering driven application of the improvement of an orthopaedic office that may then be generalized to a broader context. This works employs a phased approach which allows for synchronization between one set of tools or methodologies from one phase that inform and provide insight for the next. Additionally it facilitates an iterative effort as each phase will assess and reassess the key stakeholders and take into account the process/product life cycle thus allowing refinement of the previous phase and its results. The progression from one phase to another provides the means of measuring the progress and impact. The partnership between the Department of Orthopaedics and the Department of Systems and Industrial Engineering at the University of Arizona, provides a real-life setting for testing our hypotheses. All of the features described in this implementation make up a methodological framework that will render implications for engineers, physicians, patients, and policy makers.
• Hung, M., Baumhauer, J. F., Latt, L. D., Latt, L. D., Saltzman, C. L., Soohoo, N. F., Soohoo, N. F., Hunt, K. J., & Latt, D. L. (2013). Validation of PROMIS ® Physical Function computerized adaptive tests for orthopaedic foot and ankle outcome research.. Clinical orthopaedics and related research, 471(11), 3466-74. doi:10.1007/s11999-013-3097-1
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  In 2012, the American Orthopaedic Foot & Ankle Society(®) established a national network for collecting and sharing data on treatment outcomes and improving patient care. One of the network's initiatives is to explore the use of computerized adaptive tests (CATs) for patient-level outcome reporting..We determined whether the CAT from the NIH Patient Reported Outcome Measurement Information System(®) (PROMIS(®)) Physical Function (PF) item bank provides efficient, reliable, valid, precise, and adequately covered point estimates of patients' physical function..After informed consent, 288 patients with a mean age of 51 years (range, 18-81 years) undergoing surgery for common foot and ankle problems completed a web-based questionnaire. Efficiency was determined by time for test administration. Reliability was assessed with person and item reliability estimates. Validity evaluation included content validity from expert review and construct validity measured against the PROMIS(®) Pain CAT and patient responses based on tradeoff perceptions. Precision was assessed by standard error of measurement (SEM) across patients' physical function levels. Instrument coverage was based on a person-item map..Average time of test administration was 47 seconds. Reliability was 0.96 for person and 0.99 for item. Construct validity against the Pain CAT had an r value of -0.657 (p < 0.001). Precision had an SEM of less than 3.3 (equivalent to a Cronbach's alpha of ≥ 0.90) across a broad range of function. Concerning coverage, the ceiling effect was 0.32% and there was no floor effect..The PROMIS(®) PF CAT appears to be an excellent method for measuring outcomes for patients with foot and ankle surgery. Further validation of the PROMIS(®) item banks may ultimately provide a valid and reliable tool for measuring patient-reported outcomes after injuries and treatment.
• Taylor-Piliae, R. E., Hepworth, J. T., Latt, L. D., & Coull, B. M. (2013). Abstract TP370: Tai Chi and SilverSneakers® Interventions Improve Aerobic Endurance in Older Stroke Survivors. Stroke. doi:10.1161/str.44.suppl_1.atp370
• Taylor-piliae, R. E., Latt, L. D., Taylor-piliae, R. E., Latt, L. D., & Coull, B. M. (2012). Abstract P276: Aerobic Endurance and Leg Strength are Predictive of Gait Velocity among Community-Dwelling Stroke Survivors. Circulation, 125. doi:https://doi.org/10.1161/circ.125.supp
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  Background: Gait velocity is an objective, fundamental indicator of post-stroke walking ability. Most stroke survivors have diminished aerobic endurance and paretic leg strength, with one or both o...
• Latt, L. D., Turcotte, R. E., Isler, M. H., & Wong, C. (2010). Case series. Soft-tissue sarcoma of the foot.. Canadian journal of surgery. Journal canadien de chirurgie, 53(6), 424-31.
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  We reviewed cases of soft-tissue sarcoma of the foot to gain insight into the presentation, treatments and outcomes for this rare disease and to determine whether limb-salvage surgery yields reasonable functional and oncological outcomes..We reviewed the cases of 16 patients treated by 2 of us (R.T. and M.I.) for soft-tissue sarcoma of the foot over a 15-year period. We extracted the following information from each patient's medical record: disease status at presentation, prior treatment, histological diagnosis, American Joint Committee on Cancer (AJCC) stage, details of treatment, oncological outcome and functional outcome. Functional outcome was assessed with the Toronto Extremity Salvage Score (TESS) and the Musculoskeletal Tumor Society (MSTS 1987)..Follow-up averaged 6 (range 2–15) years. Eight patients presented after unplanned excision. Histological diagnosis was synovial sarcoma for 7 of 16 patients.The tumours were evenly distributed among the hindfoot, midfoot and forefoot. Most patients (n = 13) presented with AJCC stage II or III disease. Amputation was necessary for 3 patients, whereas limb salvage was possible for the other 13. Free tissue transfer (n = 9) and radiation therapy (n = 12) were used in most cases. Surgical margins were microscopically positive in 4 of the 13 patients treated with limb salvage.Local disease recurred in 2 patients. Lung metastases occurred in 4 patients. At last follow-up, 11 of 16 patients were alive without disease, 2 with disease and 3 had died of their disease. Functional assessment with MSTS 1987 and the TESS averaged 28%and 90%, respectively, after limb salvage..In this series, we found that, first, patients frequently presented after unplanned excision, and this may have led to worse oncological outcomes compared with patients who presented primarily. Second, limb salvage was usually possible, but it required accepting marginal resections, relying on free tissue transfer to obtain coverage and using radiation therapy to obtain local control. Third, this combination yielded an acceptable local control rate and very good functional outcomes.
• Smiley-oyen, A. L., Latt, L. D., Redfern, M. S., & Cheng, H. K. (2002). Adaptation of vibration-induced postural sway in individuals with Parkinson's disease.. Gait & posture, 16(2), 188-97. doi:10.1016/s0966-6362(02)00005-x
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  Postural control requires accurate integration of visual, vestibular, cutaneous, and proprioceptive sensory information. Previous research suggests that patients with Parkinson's disease (PD) may have difficulty with this integration process, particularly involving incongruent visual information. The purpose of this study was to determine whether PD patients also show difficulty in adaptation to erroneous proprioceptive information. Postural reactions to soleus muscle vibration were explored in 8 PD patients, 8 healthy elderly, and 8 young adults. Postural sway was recorded using an electromagnetic motion analysis system in four conditions (2 vision x 2 vibration) with four trials in each condition to test subjects' adaptation to the vibrator stimulus. The results showed that PD patients did adapt to the vibration across trials, similar to those of both control groups. It was concluded that PD patients in the early stages of the disease could override inaccurate proprioceptive inputs, relying more on true vestibular and/or visual information. These results suggest that the basal ganglia are not critical for this adaptation process in postural control.

Presentations

• Latt, D. L. (2023).

  Presentations x 10 in 2023
  
  1) Renfree SP, Simeon S, Pinder-Newton P, Ayala A, Malakoutikhah H, Latt LD. A Cadaveric Model of Plantar Pressure in Progressive Collapsing Foot Deformity Caused by Serial Ligament Transections. Poster Presentation at the 2023 Western Medical Research Conference, January 19-21, 2023, Carmel, CA.

  2) Renfree S, Simeon S, Newton P, Alfonso A, Malakoutikhah H, Borgstrom M, Latt LD. The Impact of Ligament Tears on Plantar Pressure in Progressive Collapsing Foot Deformity: A Cadaveric Model. Poster Presentation at the ORS 2023 Annual Meeting, February 10-14, 2023, Dallas TX.

  3) Chaudhry A, Latt LD. Effects of Non-surgical Treatment for Progressive Collapsing Foot Deformity: A Systematic Review. Poster Presentation at the ORS 2023 Annual Meeting, February 10-14, 2023, Dallas TX.

  4) Estrada EE, Easley JT, Safranski DL, Latt LD, Shibuya N, Puttlitz CM, Gadomski BC. Tracking Bone Resorption with Sustained Dynamic Compression in a Novel Large Animal Model of Tarsal Fusion. Poster Presentation at the ORS 2023 Annual Meeting, February 10-14, 2023, Dallas TX.

  5) Chaudry A, Latt LD. Effects of Non-surgical Treatment For Progressive Collapsing Foot Deformity: A Systematic Review. Poster Presentation at the ORS 2023 Annual Meeting, February 10-14, 2023, Dallas TX.

  6) Pan P, Renfree S, Latt LD. Pedobarographic Analysis of Progressive Collapsing Foot Deformity in a Serial Ligament Transection Cadaveric Model. Poster Presentation at Central Alabama Regional Science and Engineering Fair (CARSEF), The UAB Center for Community Outreach Development (CORD), March 4, 2023, Birmingham, AL.
  
  7) Pan P, Renfree S, Latt LD. Pedobarographic Analysis of Progressive Collapsing Foot Deformity in a Serial Ligament Transection Cadaveric Model. Poster Presentation 2023Annual Research Frontier Symposium, Alabama State University, Montgomery, Alabama, March 15-16, 2023.
  
  8) Latt LD. The AOFAS Committee on Health Outcomes, Registries, and Data (CHORD) Patient Reported Outcome Measures: Soup to Nuts. Live webinar, May 18, 2023.
  
  9) Malakoutikhah H, Latt LD. The role of the plantar fascia in supporting the arch in flatfoot deformity. Poster Presentation at the 2023 AOFAS Annual Meeting, Louisville, KY, September 20-23, 2023.

  . Refer to Title or Description section for the 9 Presentations.
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  1) Renfree SP, Simeon S, Pinder-Newton P, Ayala A, Malakoutikhah H, Latt LD. A Cadaveric Model of Plantar Pressure in Progressive Collapsing Foot Deformity Caused by Serial Ligament Transections. Poster Presentation at the 2023 Western Medical Research Conference, January 19-21, 2023, Carmel, CA.2) Renfree S, Simeon S, Newton P, Alfonso A, Malakoutikhah H, Borgstrom M, Latt LD. The Impact of Ligament Tears on Plantar Pressure in Progressive Collapsing Foot Deformity: A Cadaveric Model. Poster Presentation at the ORS 2023 Annual Meeting, February 10-14, 2023, Dallas TX.3) Chaudhry A, Latt LD. Effects of Non-surgical Treatment for Progressive Collapsing Foot Deformity: A Systematic Review. Poster Presentation at the ORS 2023 Annual Meeting, February 10-14, 2023, Dallas TX.4) Estrada EE, Easley JT, Safranski DL, Latt LD, Shibuya N, Puttlitz CM, Gadomski BC. Tracking Bone Resorption with Sustained Dynamic Compression in a Novel Large Animal Model of Tarsal Fusion. Poster Presentation at the ORS 2023 Annual Meeting, February 10-14, 2023, Dallas TX.5) Chaudry A, Latt LD. Effects of Non-surgical Treatment For Progressive Collapsing Foot Deformity: A Systematic Review. Poster Presentation at the ORS 2023 Annual Meeting, February 10-14, 2023, Dallas TX.6) Pan P, Renfree S, Latt LD. Pedobarographic Analysis of Progressive Collapsing Foot Deformity in a Serial Ligament Transection Cadaveric Model. Poster Presentation at Central Alabama Regional Science and Engineering Fair (CARSEF), The UAB Center for Community Outreach Development (CORD), March 4, 2023, Birmingham, AL.7) Pan P, Renfree S, Latt LD. Pedobarographic Analysis of Progressive Collapsing Foot Deformity in a Serial Ligament Transection Cadaveric Model. Poster Presentation 2023Annual Research Frontier Symposium, Alabama State University, Montgomery, Alabama, March 15-16, 2023.8) Latt LD. The AOFAS Committee on Health Outcomes, Registries, and Data (CHORD) Patient Reported Outcome Measures: Soup to Nuts. Live webinar, May 18, 20239) Malakoutikhah H, Latt LD. The impact of tendon lengthening following Achilles tendon repair on foot kinetics, a finite element analysis  Electronic Presentation at the 2023 AOFAS Annual Meeting, Louisville, KY, September 20-23, 2023.10) Malakoutikhah H, Latt LD. The role of the plantar fascia in supporting the arch in flatfoot deformity. Poster Presentation at the 2023 AOFAS Annual Meeting, Louisville, KY, September 20-23, 2023.
• Latt, D. L. (2018, September). Tracking patient outcomes following foot and ankle surgery: The OFAR experience 2018-2010. AOFAS 2019 Annual Meeting. Chicago, IL.
• Latt, D. L. (2020, Jan). Oral Presentation: Quantification of Bone Viscoelasticity With Lag Screw in Hindfoot Arthrodesis. 2020 Western Medical Research Conference, January 23-25, 2020. Carmel, CA: Western Medical Research Conference.
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  Johnson BW, Rugg AL, Requist MR, Alvarez A, Son MM, Latt LD. Quantification of Bone Viscoelasticity With Lag Screw in Hindfoot Arthrodesis. Oral presentation at the 2020 Western Medical Research Conference, January 23-25, 2020, Carmel, CA.
• Latt, D. L., Slayton, M. H., Amodei, R. C., Compton, K. B., & Kearney, J. (2016, Fall). Muscoloskeletal Treatments Using Intense Therapy Ultrasound: Clinical Studies for Chronic Plantar Fasciitis and Lateral Eipcondylitis. IEEE – NIH 2016 Special Topics Conference on Healthcare Innovations and Pointy-of-Care Technologies. Nov 9-11, 2016. Cancun, Mexico: IEEE - NIH.
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  Slayton MH, Amodei RC, Compton KB, Latt LD, Kearney J. Muscoloskeletal Treatments Using Intense Therapy Ultrasound: Clinical Studies for Chronic Plantar Fasciitis and Lateral Eipcondylitis. Podium presentation. IEEE – NIH 2016 Special Topics Conference on Healthcare Innovations and Pointy-of-Care Technologies. Nov 9-11, 2016, Cancun, Mexico.
• Latt, D. L. (2021, Summr). Data Acquisition System To Quantify Bone Viscoelasticity In Hindfoot and Midfoot Arthrodesis (Student paper competition finalist presentation). 2021 Summer Biomechanics, Bioengineering and Biotransport Conference (SB3C2021) held virtually, June 14 – 18, 202. Virtual: Summer Biomechanics, Bioengineering and Biotransport Conference (SB3C2021).
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  Requist M, Rugg A, Johnson B, Son M, Alvarez A, Latt LD. Data Acquisition System To Quantify Bone Viscoelasticity In Hindfoot and Midfoot Arthrodesis. Student paper competition finalist presentation. 2021 Summer Biomechanics, Bioengineering and Biotransport Conference (SB3C2021) to be held virtually, June 14 – 18, 2021.
• Latt, D. L. (2019, Feb). Podium/Slide Presentation: Postural stability in patients with posterior tibial tendon dysfunction during walking.. 2019 Mid-South Biomechanics Conference at the University of Memphis,. Memphis, TN: Mid-South Biomechanics Conference at the University of Memphis,.
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  Wang J, Bowers K, Fatsje C, Latt LD. “Postural stability in patients with posterior tibial tendon dysfunction during walking. Podium/Slide Presentation. 2019 Mid-South Biomechanics Conference at the University of Memphis, February 21-22, 2019, Memphis, TN.
• Gimber, L. H., Taljanovic, M., Latt, D. L., Chadaz, T., Caruso, C., Krupinski, E. A., Nuncio Zuniga, A. A., Nuncio Zuniga, A. A., Krupinski, E. A., Caruso, C., Chadaz, T., Latt, D. L., Taljanovic, M., Gimber, L. H., Taljanovic, M., Chadaz, T., Krupinski, E. A., Nuncio Zuniga, A. A., Caruso, C., , Latt, D. L., et al. (2018, March). Ultrasound shear wave elastography of the lateral ankle ligaments in healthy subjects at rest and stress. Society of Skeletal Radiology Annual Meeting. Austin, Texas: SSR.
• Taljanovic, M., Taljanovic, M., Chadaz, T., Chadaz, T., Krupinski, E. A., Krupinski, E. A., Nuncio Zuniga, A. A., Nuncio Zuniga, A. A., Caruso, C., Caruso, C., Latt, D. L., Latt, D. L., Gimber, L. H., & Gimber, L. H. (2018, Spring). Ultrasound shear wave elastography of the lateral ankle ligaments in healthy subjects at rest and stress. SSR 2018.
• Latt, D. L., Gao, L., Taljanovic, M., Szivek, J. A., Guerra, J. D., Klewer, J. A., Witte, R. S., Latt, D. L., Gao, L., Taljanovic, M., Szivek, J. A., Guerra, J. D., Klewer, J. A., & Witte, R. S. (2016, March). In Vivo Ultrasound Elasticity Imaging Differentiates Healthy From Diseased Tendons. Orthopaedic Research Society 2016 Annual Meeting. Orlando, Florida.
• Latt, D. L., Witte, R. S., Klewer, J. A., Gao, L., Guerra, J. D., Taljanovic, M., Szivek, J. A., Szivek, J. A., Guerra, J. D., Taljanovic, M., Gao, L., Klewer, J. A., Witte, R. S., & Latt, D. L. (2016, March). In Vivo Ultrasound Elasticity Imaging Differentiates Healthy From Diseased Tendons. ORS 2016 Annual Meeting. Orlando, Florida.
• Taljanovic, M., Latt, D. L., Gao, L., & Witte, R. S. (2016, March). In Vivo Ultrasound Tension Elastography Differentiates Healthy From Diseased Posterior Tibialis tendon. 39th Annual Meeting of the Society of Skeletal Radiology (SSR). New Orleans, LA: Society of Skeletal Radiology.

Poster Presentations

• Latt, D. L. (2015, August). Intense therapy ultrasound for the treatment of chronic plantar fasciitis: Preliminary results of clinical study.. IEEE Engineering in Medicine and Biology Society.. Milan, Italy: IEEE Engineering in Medicine and Biology Society Meeting, August 2015.
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  Slayton, MH, Amodei RC, McNelly A, Latt LD. Intense therapy ultrasound for the treatment of chronic plantar fasciitis: Preliminary results of clinical study. Poster Presentation. IEEE Engineering in Medicine and Biology Society. Aug 25-29, 2015, Milan, Italy.
• Latt, D. L. (2015, July). Comparison of Three Techniques for the Quantification of Hindfoot Alignment. Annual meeting of the American Orthopaedic Foot & Ankle Society. Long Beach, California.
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  McGlone S, Rabadam G, Grewal G, Najafi B, Latt LD. Comparison of Three Techniques for the Quantification of Hindfoot Alignment. E-Poster. Annual meeting of the American Orthopaedic Foot & Ankle Society, July 15-18, 2015, Long Beach, CA.
• Latt, D. L. (2015, July). Self-Reported Injuries and Treatments in Collegiate Dancers. Annual meeting of the American Orthopaedic Foot & Ankle Society, July 15-18, 2015.
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  Latt LD, Holman N, Amir N. Self-Reported Injuries and Treatments in Collegiate Dancers. E-Poster. Annual meeting of the American Orthopaedic Foot & Ankle Society, July 15-18, 2015, Long Beach, CA.
• Latt, D. L. (2020, Feb). Poster Presentation: Quantification Of Compression Maintenance Using A Lag Screw For Hindfoot Arthrodesis. ORS 2020 Annual Meeting, Feb 8-11, 2020. Phoenix, AZ: ORS.
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  Rugg AL, Requist MR, Johnson BW, Alvarez A, Son MM, Latt LD. Quantification Of Compression Maintenance Using A Lag Screw For Hindfoot Arthrodesis. Accepted for poster presentation. ORS 2020 Annual Meeting, February 8-11, 2020, Phoenix, AZ.
• Latt, D. L. (2020, Feb). Ultrasound shear wave elastography (SWE) of the tibialis posterior tendon (PTT) and tibiospring/spring ligaments at rest and stress in normal feet compared to asymptomatic and symptomatic acquired flatfoot deformity. International Symposium on Ligaments and Tendons (Feb 7, 2020). Phoenix, AZ: International Symposium on Ligaments and Tendons.
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  Taljanovic MS, Kim W, Caruso CC, Krupinski EA, Nuncio A, Latt LD. Ultrasound shear wave elastography (SWE) of the tibialis posterior tendon (PTT) and tibiospring/spring ligaments at rest and stress in normal feet compared to asymptomatic and symptomatic acquired flatfoot deformity. Abstract accepted Dec 16, 2019 for presentation at the International Symposium on Ligaments and Tendons, February 7, 2020, Phoenix, AZ
• Latt, D. L. (2020, Sept). The Effects of Fibular Malrotation on Tibiotalar Contact Area and Peak Pressure Distributions in Weber B Ankle Fractures. AOFAS Annual Meeting 2020, September 9-12, 2020. Virtual: AOFAS.
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  Khwaja AM, Latt LD. The Effects of Fibular Malrotation on Tibiotalar Contact Area and Peak Pressure Distributions in Weber B Ankle Fractures. Abstract. AOFAS Annual Meeting 2020, September 9-12, 2020, San Antonio, TX.
• Latt, D. L., Christensen, D. N., McNelly, A. L., Slayton, M. H., Amodei, R. C., & Fastje, C. D. (2016, July). Randomized Controlled Trial of Intense Therapeutic Ultrasound for the treatment of Chronic Plantar Fasciiti. Annual meeting of the American Orthopaedic Foot & Ankle Society, July 20-23, 2015. Toronto, Canada: AOFAS.
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  Latt LD, Christensen DN, McNelly AL, Slayton MH, Amodei RC, Fastje CD. Randomized Controlled Trial of Intense Therapeutic Ultrasound for the treatment of Chronic Plantar Fasciitis. Abstract accepted Jan 5, 2016 for Podium presentation. Annual meeting of the American Orthopaedic Foot & Ankle Society, July 20-23, 2016, Toronto, Ontario, Canada.
• Latt, D. L., Gao, L., Schmidt, H., Taljanovic, M., Witte, R. S., & Fastje, C. (2016, Fall). Dynamic Model to Optimize Ultrasound Elasticity Imaging of Tendon for Assessment of Tendinopathies. Biomedical Engineering Society Annual Meeting, Oct 5-8, 2016. Minneapolis, MN: Biomedical Engineering Society.
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  Schmitz H, Gao L, Zuiga A, Fastje C, Taljanovic J, Latt LD, Witte R. Dynamic Model to Optimize Ultrasound Elasticity Imaging of Tendon for Assessment of Tendinopathies. Poster Presentation. Biomedical Engineering Society Annual Meeting, Oct 5-8, 2016, Minneapolis, MN.
• Latt, D. L., Witte, R. S., Gao, L., Taljanovic, M., Schmidt, H., Szivek, J. A., Klewer, J., Klewer, J., Schmidt, H., Szivek, J. A., Gao, L., Taljanovic, M., Witte, R. S., & Latt, D. L. (2016, August). Minimizing strain error for in vivo ultrasound elasticity imaging of human tendon. IEEE Engineering in Medicine and Biology Society, August 16-20, 2016. Orlando, Florida: IEEE Engineering in Medicine and Biology Society.
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  Gao L, Schmitz H, Zuniga Z, Klewer J, Szivek J, Taljanovic M, Latt LD Witte R. Minimizing strain error for in vivo ultrasound elasticity imaging of human tendon. Poster presentation. IEEE Engineering in Medicine and Biology Society. Aug 16-20, 2016, Orlando, FL.
• Latt, D. L. (2019, Feb). In Vivo Ultrasound Elastography of Material Properties of Healthy and Diseased Human Posterior Tibial Tendon. ORS 2019 Annual Meeting, February 2-5, 2019, Austin, TX.. Austin, TX: ORS.
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  Latt LD, Zuniga AN, Schmitz HA, Lim AE, Roussas A, Tang Y, Klewer JA, Taljanovic MS, Witte RS. . In Vivo Ultrasound Elastography of Material Properties of Healthy and Diseased Human Posterior Tibial Tendon. Poster Presentation (Tendon & Ligament – Diseases & Disorders Category). ORS 2019 Annual Meeting, February 2-5, 2019, Austin, TX.
• Latt, D. L. (2019, March). ePoster: Ultrasound shear wave elastography (SWE) of the tibialis posterior tendon (PTT) and tibiospring/spring ligaments at rest and stress in normal feet compared to asymptomatic and symptomatic acquired flatfoot deformity.. 42nd Annual Meeting of the Society of Skeletal Radiology. Scottsdale, AZ: SSR.
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  Taljanovic MS, Kim W, Caruso CC, Krupinski EA, Nuncio A, Latt LD. Ultrasound shear wave elastography (SWE) of the tibialis posterior tendon (PTT) and tibiospring/spring ligaments at rest and stress in normal feet compared to asymptomatic and symptomatic acquired flatfoot deformity. ePoster. 42nd Annual Meeting of the Society of Skeletal Radiology, March 10-13, 2019. Scottsdale, AZ.
• Latt, D. L. (2019, Nov). Quantification Of Compression Maintenance Using A Lag Screw For Hindfoot Arthrodesis. American Medical Association EXPO. Carmel, CA: AMA.
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  Rugg AL, Requist MR, Johnson BW, Alvarez A, Son MM, Latt LD. Quantification Of Compression Maintenance Using A Lag Screw For Hindfoot Arthrodesis. Poster presentation at the American Medical Association EXPO, November 15, 2019, Carmel, CA.
• Latt, D. L. (2019, Oct). Quantification Of Compression Maintenance Using A Lag Screw For Hindfoot Arthrodesis. American College of Physicians – Arizona Chapter 2019 Annual Meeting Poster Competition. Phoenix, AZ: American College of Physicians.
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  Rugg AL, Requist MR, Johnson BW, Alvarez A, Son MM, Latt LD. Quantification Of Compression Maintenance Using A Lag Screw For Hindfoot Arthrodesis. Poster presentation at the American College of Physicians – Arizona Chapter 2019 Annual Meeting Poster Competition, October 19, 2019, Phoenix, AZ.
• Latt, D. L. (2019, Oct). Self-reported injuries and treatments in collegiate dancers. International Association for Dance Medicine & Science Annual Conference. Montreal, Quebec: International Association for Dance Medicine & Science.
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  Paulsen K, Latt LD. Self-reported injuries and treatments in collegiate dancers. Poster presentation at the International Association for Dance Medicine & Science Annual Conference, October 24-27, 2019, Montreal, Quebec, Canada.
• Latt, D. L. (2019, Sept). Hindfoot Bone Viscoelasticity and Stress Relaxation.. AOFAS Annual Meeting, September 12-15, 2019. Chicago, IL: AOFAS.
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  Son M, Johnson B, Latt LD. Hindfoot Bone Viscoelasticity and Stress Relaxation. Poster presentation at the AOFAS Annual Meeting, September 12-15, 2019, Chicago, IL.
• Schmitz, H., Witte, R. S., Gao, L., Latt, D. L., Ingram, C. P., Taljanovic, M., Klewer, J., Szivek, J. A., Klewer, J., Szivek, J. A., Ingram, C. P., Taljanovic, M., Gao, L., Latt, D. L., Schmitz, H., & Witte, R. S. (2016, January). Ultrasound Elasticity Imaging of the Posterior Tibial Tendon using FOCUS Simulation Software. 27th Annual Undergraduate Biology Research Program Conference. Tucson, AZ.

Other Teaching Materials

• Latt, D. L. (2015. Shear Wave Elastography: Basic Physics and Musculoskeletal Applications.. Radiologic Society of North America 100th Scientific Assembly and Annual Meeting, Nov 29-Dec 4 2015.
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  Taljanovic MS, Melville D, Gimber LH, Latt LD, Becker GW, Klauser A. Shear Wave Elastography: Basic Physics and Musculoskeletal Applications. Accepted June 24, 2015 as an Educational Exhibit. Radiologic Society of North America 100th Scientific Assembly and Annual Meeting, November 29 - December 4, 2015. Chicago, IL.

Others

• Latt, D. L. (2015, November). In vivo Ultrasound Elasticity Imaging Differentiates Healthy From Diseased Tendons.. Abstract accepted November 2015.
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  Latt LD, Gao L, Taljanovic MS, Szivek JA, Guerra JD, Klewer JA, Witte RS. In vivo Ultrasound Elasticity Imaging Differentiates Healthy From Diseased Tendons. Abstract accepted Nov 4, 2015. Podium Presentation at the Orthopaedic Research Society 2016 Annual Meeting, March 5-8, 2016. Orlando, FL.