Total Talus Replacement: Case Series and Literature Review

West, Tenaya A.; Rush, Shannon M.

doi:10.1053/j.jfas.2020.08.018

Cited by 35 publications

(27 citation statements)

References 21 publications

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“…Due to advancements in modern 3D printing and prosthesis casting technology [6], whole talar prostheses have been used for clinical treatment [7][8][9][10], considerably improving the treatment for talus collapse necrosis worldwide. The casting process and surgical indications for the prosthesis are very similar to those used for the conventional method, but the method of prosthesis xation is different.…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Establishment of a Finite Element Model and Biomechanical Analysis of Different Fixation Methods for Total Talar Prosthesis Replacement

Yang¹,

Chang²,

Wan³

et al. 2021

Preprint

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Back ground：A three-dimensional finite element model of the whole foot with high geometric similarity was established and used to simulate the conditions after whole talar prosthesis implantation with several fixation methods, including Screw fixation of subtalar+talus-navicular joint, fixation with screws at only the subtalar joint, and fixation without screws. The biomechanical characteristics of the talus prosthesis were assessed in different gait phases to guide the selection of surgical methods in clinical practice.Methods：With the three-dimensional CT data of a volunteer's foot, Mimics13.0 and Geomagic10.0 software were used to carry out geometric reconstruction of the ankle-related tissues, and Hypermesh10.0 software was used for grid division and material attribute selection. Finally, the data were imported into Abaqus 6.9, and the simulated screw data were applied to different models. Finite element models with different fixation methods were simulated, and the stresses exerted by the human body in three gait phases (heel-strike, midstance and push-off) were simulated. The pressure changes in the articular surface around the talus or the prosthesis, the micromotion of the talus and the prosthesis and ankle motion were measured. Results：Finite element analysis on the biomechanical mechanism showed that screw fixation of the prosthesis in different gait phases mainly increases the pressure on the tibialis articular surface as well as decreases the pressure on the fused articular surface and joint micromotion, which hinders ankle motion. The indicator values were nearly the same in the models of fixation without screws and the normal state.Conclusion：The 3D finite element model created in this study has been verified to be an accurate and reliable model. The biomechanical mechanism varies by fixation method according to finite element analysis. Fixation of the prosthesis without screws yields values most similar to normal values.

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Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Establishment of a Finite Element Model and Biomechanical Analysis of Different Fixation Methods for Total Talar Prosthesis Replacement

Yang¹,

Chang²,

Wan³

et al. 2021

Preprint

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“…One patient required revision of the tibial component due to loosening. 10 Further studies report outcomes of custom made total talus replacements for avascular necrosis of the talus. Tonogai et al investigated the outcomes of two cases of idiopathic talar AVN treated with custom total aluminum ceramic talar prosthesis.…”

Section: Discussionmentioning

confidence: 99%

Custom total talus replacement as a salvage option for failed total ankle arthroplasty: A prospective report of two cases

Strand

Juels²,

Nowak

2022

Foot & Ankle Surgery: Techniques, Reports & Cases

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“…( Ando et al, 2016 ) Hence, some surgeons preferred to fix the talar prosthesis to the calcaneus with screws to enhance stability. ( Mu et al, 2021 ; West and Rush, 2021 ) Porous coating surfaces and other auxiliary devices have also been used to enhance prosthesis fixation in some studies. ( Stevens et al, 2007 ; Regauer et al, 2017 ) Notably however, reported cases of prosthesis failure such as loosening and subsidence have mainly occurred at the bone-prosthesis interface.…”

Section: Discussionmentioning

confidence: 99%

Total Talar Replacement With Custom-Made Vitallium Prosthesis for Talar Avascular Necrosis

Luo

Zhang

Han

et al. 2022

Front. Bioeng. Biotechnol.

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Background: The current study investigated the application of three-dimensional (3D) printing technology in the treatment of talar avascular necrosis (TAN). Custom-made Vitallium talar prostheses were designed and generated via 3D printing. We hypothesized that these talar prostheses would facilitate more stable positioning, better ergonomically fit the ankle joint surfaces, and promote favorable long-term prognoses.Material and Methods: Computed tomography scans of both ankle joints were acquired from three patients diagnosed with TAN. The talar on the unaffected side was used as the design blueprint. Hence, with the aid of 3D printing technology a customized talar prosthesis made from a novel Vitallium alloy could be manufactured for each individual patient.Results: In all three cases there were no signs of prosthesis loosening or substantial degenerative change in the surrounding area of the joint, but small osteophytes were observed on the tibial side and navicular side. No chronic infection or other prosthesis-related complications were observed in any of the patients. All three were able to walk without pain at the most recent follow-up.Conclusion: With the aid of 3D printing and a novel Vitallium alloy, total talar replacement achieved encouraging results in 3/3 patients. All patients were satisfied with their joint function, and were able to return to their daily activities without limitations. Although more cases and longer-term follow-up periods are required, the success rate reported herein is encouraging.

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Total Talus Replacement: Case Series and Literature Review

Cited by 35 publications

References 21 publications

WITHDRAWN: Establishment of a Finite Element Model and Biomechanical Analysis of Different Fixation Methods for Total Talar Prosthesis Replacement

WITHDRAWN: Establishment of a Finite Element Model and Biomechanical Analysis of Different Fixation Methods for Total Talar Prosthesis Replacement

Custom total talus replacement as a salvage option for failed total ankle arthroplasty: A prospective report of two cases

Total Talar Replacement With Custom-Made Vitallium Prosthesis for Talar Avascular Necrosis

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