AI Article Synopsis
- Two out of three ankles experienced failure after total ankle arthroplasty due to varus migration of the tibial component, despite different alignment techniques used during the procedure.
- One ankle successfully maintained its prosthesis position over five years with tibial osteotomy performed in valgus alignment, while the others had varus alignments at 5° and 2°.
- The study suggests that internal fixation post-medial malleolar osteotomy is essential for severe varus cases, and avoiding medially shifted placement of the tibial component may reduce complication risks.
Article Abstract
Of the three ankles after total ankle arthroplasty (TAA) with medial malleolar osteotomy for severe varus deformity (talar varus tilt >10°), two failed in varus migration of the tibial component. In these two cases, tibial osteotomy was performed with varus alignment of 5°and 2°, and with medially shifted placement of tibial component, while one ankle showed no migratoin of prostheses after 5 years, even with nonunion. In this case, tibial osteotomy was performed with a valgus alignment of 4°. Internal fixation after medial malleolar osteotomy should be done for severe varus cases. Medially shifted placement of tibial component should be avoided. Fortunately, the failure did not occur in a case of valgus of the distal tibia. Valgus tibial osteotomy might help to reduce the collision of the talus against the medial malleolus.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11138109 | PMC |
| http://dx.doi.org/10.1093/jscr/rjae358 | DOI Listing |
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