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Subtalar joint

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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/28633780/subtalar-coalitions-does-the-morphology-of-the-subtalar-joint-involvement-influence-outcomes-after-coalition-excision
#3
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
#4
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
#5
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/28619268/ankle-hindfoot-after-calcaneal-fractures-a-biomechanical-study
#6
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
#7
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
#8
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/28594068/chimpanzee-ankle-and-foot-joint-kinematics-arboreal-versus-terrestrial-locomotion
#9
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/28587475/management-of-severe-equinovalgus-in-patients-with-cerebral-palsy-by-naviculectomy-in-combination-with-midfoot-arthrodesis
#10
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
#11
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
#12
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
#13
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
https://www.readbyqxmd.com/read/28562561/comparison-of-mid-term-efficacy-of-spastic-flatfoot-in-ambulant-children-with-cerebral-palsy-by-2-different-methods
#14
Jie Wen, Hong Liu, Sheng Xiao, Xin Li, Ke Fang, Ming Zeng, Zhongwen Tang, Shu Cao, Fanling Li
To compare the treatment efficacy of spastic flatfoot surgery by 2 different surgical methods: nonfusion subtalar arthroereisis using subtalar joint stabilizer (SJS) and Dennyson-Fulford subtalar arthrodesis (D-FSA).A total of 26 cases of ambulant children with cerebral palsy diagnosed as spastic flatfoot were surgically treated from January 2011 to December 2014. Preoperative and postoperative American Orthopedic Foot and Ankle Society-Ankle and Hindfoot (AOFAS-AH) scores, anteroposterior-talocalcaneal angles (ATAs), and lateral talar-first metatarsal angles (Meary angles) of the affected foot were recorded...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28560132/arthroscopic-capsular-release-of-the-talocalcaneonavicular-joint
#15
Tun Hing Lui
Arthrofibrosis of the talocalcaneonavicular joint can follow talar neck fracture especially if anterior approaches have been used for fracture fixation. Capsular release of the talocalcaneonavicular joint is indicated if the painful hindfoot stiffness cannot be controlled with conservative treatment. Open capsular release of the talocalcaneonavicular joint demands extensive soft tissue dissection and hinders early postoperative mobilization exercise of the joint. The purpose of this technical note is to describe a minimally invasive approach of arthroscopic capsular release of the talocalcaneonavicular joint that is composed of arthroscopic release of the talonavicular joint and the anterior subtalar joint...
December 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28558765/sustentacular-screw-placement-with-guidance-during-orif-of-calcaneal-fracture-an-anatomical-specimen-study
#16
Chen Wang, Dichao Huang, Xin Ma, Xu Wang, Jiazhang Huang, Chao Zhang, Li Chen, Xiang Geng
BACKGROUND: The sustentacular screw is essential to maintain the stability of the subtalar joint during ORIF (open reduction with internal fixation) of calcaneal fractures. Currently, the screw is still inserted based on surgeons' anatomical experiences and nearly 40% of screws are misplaced from the sustentaculum. Previous studies demonstrated some methods of sustentacular screw placement through anatomical measurements or navigation system. The purposes of this study are to design an assistant guidance device that can effectively improve the accuracy of sustentacular screw placement and to compare the accuracy of this technique with traditional screw placement based on experience...
May 30, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28523427/-total-ankle-arthroplasty-with-simultaneous-subtalar-fusion
#17
J Mainzer, P Rippstein
OBJECTIVE: Pain free weight bearing ability with orthograde hindfoot position and preserved tibiotalar motion. INDICATIONS: Symptomatic arthritis of the ankle and subtalar joint, additional subtalar hindfoot malalignment. CONTRAINDICATIONS: Absolute: acute infection, noncorrectable ligamentous instability or bony defects, restricted perfusion, diabetic foot syndrome. Relative: inability to comply with postoperative partial weight bearing, only moderate symptoms of subtalar arthritis, smoking, intricate soft tissue situation...
June 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28514509/the-dimensions-of-the-tarsal-sinus-and-canal-in-different-foot-positions-and-its-clinical-implications
#18
R P Kleipool, L Blankevoort, J M Ruijter, G M M J Kerkhoffs, R J Oostra
INTRODUCTION: This study presents a reference for the dimensions of the tarsal sinus and canal in healthy adults in different foot positions to facilitate understanding of the kinematics of the subtalar joint, the effect of an implant, and other clinical issues. MATERIALS AND METHODS: In a 3D CT stress test on 20 subjects, the right foot was forced into a neutral and eight different extreme foot positions while CT scans were obtained. The bones were segmented in the neutral foot position...
May 17, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28503539/differences-in-pes-planus-and-pes-cavus-subtalar-eversion-inversion-before-and-after-prolonged-running-using-a-two-dimensional-digital-analysis
#19
Charlotte Sinclair, Ulla Svantesson, Rita Sjöström, Marie Alricsson
In sports, there is a constant discussion about the hyper-pronation and supination of the foot during loading and its relation to injuries or discomfort. The purpose of the present study was to investigate the possible differences in the subtalar joint in the midstance phase of running, between individuals with Pes Planus and Pes Cavus, after 5 min and 45 min of running. Thirty-four subjects, meeting the requirements for Pes Planus (30 feet) and Pes Cavus (35 feet), according to the criteria for Medial Longitudinal Arch-angle, were included in the study...
April 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28502352/revision-of-stemmed-agility-implants
#20
REVIEW
Michael M Brage, Uma E Ramadorai
Total ankle arthroplasty has advanced rapidly in the last 20 years. Early agility implants enjoyed improved survivability compared with more archaic total ankle implants. When talar subsidence occurs, the revision options include a stemmed component to improve stability by spanning the subtalar joint. Removal and revision of these stemmed components can be difficult because of ingrowth and bone loss.
June 2017: Foot and Ankle Clinics
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