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https://www.readbyqxmd.com/read/28639171/subject-specific-axes-of-rotation-based-on-talar-morphology-do-not-improve-predictions-of-tibiotalar-and-subtalar-joint-kinematics
#1
Jennifer A Nichols, Koren E Roach, Niccolo M Fiorentino, Andrew E Anderson
Use of subject-specific axes of rotation may improve predictions generated by kinematic models, especially for joints with complex anatomy, such as the tibiotalar and subtalar joints of the ankle. The objective of this study was twofold. First, we compared the axes of rotation between generic and subject-specific ankle models for ten control subjects. Second, we quantified the accuracy of generic and subject-specific models for predicting tibiotalar and subtalar joint motion during level walking using inverse kinematics...
June 21, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28634696/prominent-midfoot-involvement-in-children-with-enthesitis-related-arthritis-category-of-juvenile-idiopathic-arthritis
#2
Sanat Phatak, Namita Mohindra, Abhishek Zanwar, Amita Aggarwal
Foot involvement is common in juvenile idiopathic arthritis (JIA) but is often unrecognized and difficult to treat. This study was done to assess clinical and radiological involvement of the feet and its impact on function in Indian children with enthesitis-related arthritis (ERA). We enrolled consecutive children with ERA with disease duration of less than 5 years. All patients underwent clinical examination of the feet and filled the juvenile arthritis foot index (JAFI) questionnaire. Ultrasound (US) of foot joints and entheses and extremity magnetic resonance imaging (MRI) scan of one foot were done...
June 20, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28633784/complications-of-talar-neck-fractures-by-hawkins-classification-a%C3%A2-systematic-review
#3
REVIEW
Richard K Jordan, Kunaal R Bafna, Jiayong Liu, Nabil A Ebraheim
The goal of the present study was to perform a systematic review of the published data on talar neck fractures for a better understanding of the postoperative clinical outcomes using open reduction and internal fixation stratified by Hawkins type. A PubMed search was performed using the keywords "talar," "neck," and "fracture." This search identified 209 potential studies, which were reviewed to yield 16 studies that met the criteria. The surgical outcomes of talar neck fractures stratified by the Hawkins classification analyzed in the present study were as follows: American Orthopaedic Foot and Ankle Society scale score was 77...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28633782/factors-predicting-length-of-hospital-stay-and-extended-care-facility-admission-after-hindfoot-arthrodesis-procedures
#4
Jacob Deister, Brian G Cothern, Chad Williams, Andrew W Froehle, Richard T Laughlin
Delayed identification of patients requiring admission to extended care facilities (ECFs) can lead to greater healthcare costs through an increased length of hospital stay (LOHS). Previous studies of hip and knee arthroplasty identified factors associated with a likely discharge to an ECF. These issues have not been extensively studied for major hindfoot procedures. We conducted a retrospective review of 198 cases treated during a 3-year period to identify the risk factors for an extended LOHS and ECF admission after ankle arthrodesis, triple arthrodesis, pantalar arthrodesis, and subtalar arthrodesis...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28633780/subtalar-coalitions-does-the-morphology-of-the-subtalar-joint-involvement-influence-outcomes-after-coalition-excision
#5
Susan T Mahan, Victoria I Prete, Samantha A Spencer, James R Kasser, Sarah D Bixby
Posteromedial subtalar (PMST) coalitions are a recently described anatomic subtype of tarsal coalitions. We compared with clinical patient-based outcomes of patients with PMST and standard middle facet (MF) coalitions who had undergone surgical excision of their coalition. The included patients had undergone surgical excision of a subtalar tarsal coalition, preoperative computed tomography (CT), and patient-based outcomes measures after surgery (including the American Orthopaedic Foot and Ankle Society [AOFAS] scale and University of California, Los Angeles [UCLA], activity score)...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28633776/bioabsorbable-calcaneo-stop-implant-for-the-treatment-of-flexible-flatfoot-a-retrospective-cohort-study-at-a-minimum-follow-up-of-4%C3%A2-years
#6
Sandro Giannini, Matteo Cadossi, Antonio Mazzotti, Valentina Persiani, Giuseppe Tedesco, Matteo Romagnoli, Cesare Faldini
Arthroereisis of the subtalar joint is a common surgical technique in Europe for the management of flexible flatfoot in the pediatric population. In most cases, it is performed using a calcaneo-stop metallic screw. Despite the good clinical results, screw removal is always advised after 2 to 3 years. The use of a bioabsorbable screw might overcome the need for a second operation to remove a nonabsorbable device. We report the results of a biodegradable calcaneo-stop screw at a minimum of 4 years of follow-up...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28633775/ball-and-socket-ankle-mechanism-and-computational-evidence-of-concept
#7
James R Jastifer, Peter A Gustafson, Aaron Labomascus, Tyler Snoap
The ball and socket ankle joint is a morphologically abnormal joint characterized by rounding of the articular surface of the talus. Other than anecdotal observation, little evidence has been presented to describe the development of this deformity. The purpose of the present study was to review ankle and subtalar joint mechanics and to kinematically examine the functional combination of these joints as a mechanism of the ball and socket ankle deformity. We reviewed functional representations of the ankle joint, subtalar joint, and ball and socket ankle deformity...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28630842/irreducible-subtalar-dislocation-caused-by-sustentaculum-tali-incarceration
#8
Mourad Zaraa, Ismail Jerbi, Sabri Mahjoub, Heithem Sehli, Mondher Mbarek
INTRODUCTION: Subtalar dislocation is an uncommon lesion in traumatology chiefly when it concerns the lateral form. Surgical treatment is required when a fracture is related or the dislocation is irreducible. Even well treated, these dislocations progress unavoidably to subtalar arthrosis, which stays well tolerated. CASE REPORT: A 46-year-old male with irreducible lateral subtalar dislocation caused sustentaculum tali incarceration confirmed on computed tomography (CT)...
January 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28623061/comparison-of-extraosseous-talotarsal-stabilization-implants-in-a-stage-ii-adult-acquired-flatfoot-model-a-finite-element-analysis
#9
Jian Xu, Xin Ma, Daping Wang, Wei Lu, Weimin Zhu, Kan Ouyang, Haifeng Liu, Hao Li, Luoyong Jiang
Subtalar arthroereisis has been proved to be an efficient method for correcting flexible adult flatfoot. However, the optimal sinus tarsi implant is still debated and yet to be determined. In the present study, we compared the biomechanical effects of type I and II sinus tarsi implants in stage II adult-acquired flatfoot deformity (AAFD). First, a finite element model of stage II AAFD was established in which virtual surgery of subtalar arthroereisis was simulated. The indexes of plantar stress distribution, peak von Mises of the medial and lateral columns, strain of the medial ligaments and plantar fascia, arch height, talo-first metatarsal angle, calcaneus pitch angle, talonavicular coverage angle, and hindfoot valgus angle were all compared and analyzed...
June 13, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28619268/ankle-hindfoot-after-calcaneal-fractures-a-biomechanical-study
#10
Xu Can, Li Mingqing, Wang Chenggong, Li Kanghua, Liu Hua
INTRODUCTION: Both the overall shape of the calcaneus and anatomical reduction of joint congruity are important prognostic factors. However, there is a significant lack of biomechanical data supporting the clinical importance of calcaneus height, length and heel width. The objective of this study was to determine the effects of abnormal calcaneus morphology on ankle-hindfoot biomechanics. HYPOTHESIS: The normal biomechanics of the ankle-hindfoot would be severely disrupted by the abnormal calcaneus morphology...
June 12, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28616637/calcaneal-cysts-and-lipomas-a-common-pathogenesis
#11
REVIEW
Jacques Malghem, Frédéric Lecouvet, Bruno Vande Berg
Calcaneal cysts and lipomas are relatively rare, benign bone lesions. They are similar in many ways, including in their location and radiological appearance, but their content differs. Cysts contain fluid whereas lipomas contain fat, although some lesions may exhibit a mixed content. The pathogenesis of the two entities is the subject of controversy. The theory that calcaneal cysts may result from lipomatous necrosis has been widely suggested in the literature, but no such progression has ever been shown. The contrary hypothesis has also been considered, i...
June 14, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28606790/unstable-open-posterior-subtalar-dislocation-treated-with-a-ring-external-fixator-a-case-report-and-review-of-the-literature
#12
Alex Quok An Teo, Fucai Han, Yu Han Chee, Gavin Kane O'Neill
Traumatic dislocation of the subtalar joint is an infrequently occurring injury, with open true posterior dislocation an even rarer injury. We describe our treatment of a young motorcyclist who was brought into hospital after a road traffic accident, having sustained an open posterior subtalar dislocation. After initial reduction and resuscitation in the emergency department, he was taken to the operating theater for emergent wound debridement and external fixation of his ankle using a unilateral external fixator device...
June 9, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28594487/current-management-of-talar-fractures
#13
Matthew P Sullivan, Reza Firoozabadi
Talar fractures are some of the most challenging injuries that orthopaedic traumatologists manage. The current knowledge of functional alterations with regard to malreduction of talar fractures is well established. Decision making with regard to timing, approach, and implant selection as well as strategies to help achieve accurate restoration of talar anatomy substantially affect outcomes and must be carefully considered. Perfect anatomic talar reconstruction should always be attempted, and orthopaedic surgeons should have a strong working knowledge of the vascular, three-dimensional, and radiographic anatomy of the talus before performing talar surgery...
February 15, 2017: Instructional Course Lectures
https://www.readbyqxmd.com/read/28594486/challenges-and-controversies-of-foot-and-ankle-trauma
#14
Cyrus E Taghavi, Michael Isiah Sandlin, David B Thordarson
Traumatic injury to the foot and ankle can result in long-term disability, which may have substantial negative implications on a patient's functional outcomes and quality of life. The diagnosis and appropriate management of these challenging injuries are not always agreed on or straightforward. In particular, the appropriate diagnosis and management of distal tibiofibular syndesmotic injuries as well as the surgical approach and role of primary subtalar arthrodesis for intra-articular calcaneal fractures are controversial...
February 15, 2017: Instructional Course Lectures
https://www.readbyqxmd.com/read/28594068/chimpanzee-ankle-and-foot-joint-kinematics-arboreal-versus-terrestrial-locomotion
#15
Nicholas B Holowka, Matthew C O'Neill, Nathan E Thompson, Brigitte Demes
OBJECTIVES: Many aspects of chimpanzee ankle and midfoot joint morphology are believed to reflect adaptations for arboreal locomotion. However, terrestrial travel also constitutes a significant component of chimpanzee locomotion, complicating functional interpretations of chimpanzee and fossil hominin foot morphology. Here we tested hypotheses of foot motion and, in keeping with general assumptions, we predicted that chimpanzees would use greater ankle and midfoot joint ranges of motion during travel on arboreal supports than on the ground...
June 8, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28587485/management-of-nonunited-talar-fractures-with-avascular-necrosis-by-resection-of-necrotic-bone-bone-grafting-and-fusion-with-an-intramedullary-nail
#16
Mohamed Mokhtar Abd-Ella, Ahmed Galhoum, Amr Farouk Abdelrahman, Markus Walther
BACKGROUND: The presence of nonunion of a talar fracture with displacement, together with complete avascular necrosis, is a challenging entity to treat. METHODS: Twelve patients, 8 men (66.7%) and 4 women (33.3%), with nonunited talar fractures and extensive avascular necrosis of the talus were included. The average age was 27.7 years (range, 19-38 years). After exclusion of infection, the patients underwent resection of necrotic bone, bulk autograft, and fusion using an intramedullary nail...
June 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28587475/management-of-severe-equinovalgus-in-patients-with-cerebral-palsy-by-naviculectomy-in-combination-with-midfoot-arthrodesis
#17
Chakravarthy U Dussa, Leonhard Döderlein, Raimund Forst, H Böhm, Albert Fujak
BACKGROUND: Equinovalgus deformity is the second most common deformity in cerebral palsy and may be flexible or rigid. Several operative methods from joint sparing to arthrodesis have been described with varying success rates. The aim of this study was to investigate the effectiveness of naviculectomy in combination with midfoot arthrodesis (talo-cuneiform and calcaneocuboid arthrodesis) in the correction of a rigid equinovalgus foot deformity in cerebral palsy. METHODS: Forty-eight rigid equinovalgus feet were operated upon in 30 patients from 2008 to 2013...
June 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28576195/tibiotalocalcaneal-arthrodesis-for-foot-and-ankle-deformities
#18
REVIEW
Patrick R Burns, Augusta Dunse
Tibiotalocalcaneal arthrodesis is a safe and viable option to treat patients with arthridities affecting ankle and subtalar joints, neuromuscular disorders, avascular necrosis of the talus, failed ankle arthrodesis, instability, and Charcot neuroarthropathy. Choice of incision and fixation is based on deformity, pathology, prior surgery and hardware, and surgeon comfort and preference. Intramedullary nails offer high primary stability, reduce sustained soft tissue damage, and may allow for earlier return to activities than traditional plate or screw constructs...
July 2017: Clinics in Podiatric Medicine and Surgery
https://www.readbyqxmd.com/read/28576193/hindfoot-arthrodesis-for-the-elective-and-posttraumatic-foot-deformity
#19
REVIEW
John J Stapleton, Thomas Zgonis
Triple (talonavicular, subtalar, and calcaneocuboid) joint arthrodesis and most recently double (talonavicular and subtalar) joint arthrodesis have been well proposed in the literature for surgical repair of the elective, posttraumatic, and/or neuropathic hindfoot deformities. The articulation of the hindfoot with the ankle and midfoot is multiaxial, and arthrodesis of these joints can significantly alter the lower extremity biomechanical manifestations by providing anatomic correction and alignment. This article reviews the indications and preoperative planning for some of the most common procedures to address the hindfoot deformity...
July 2017: Clinics in Podiatric Medicine and Surgery
https://www.readbyqxmd.com/read/28576192/subtalar-joint-arthrodesis-for-elective-and-posttraumatic-foot-and-ankle-deformities
#20
REVIEW
Lawrence A DiDomenico, Danielle N Butto
Subtalar joint arthrodesis is a procedure used in posttraumatic arthritis, osteoarthritis, tarsal coalition management, posterior tibial tendon dysfunction, and inflammatory arthropathies, and can be used in deformity correction. The goals of the procedure are to eliminate pain, improve function, restore stability, and realign the hind foot. The procedure has high patient satisfaction with low complications while preserving motion in adjacent tarsal joints. Joint preparation is important and time should be spent preparing the joint for successful arthrodesis and the fixation construct needs to be done well and effectively to provide a solid Arbeitsgemeinschaft für Osteosynthesefragen (AO) construct for good results...
July 2017: Clinics in Podiatric Medicine and Surgery
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