Fixed-bearing unicompartmental knee arthroplasty tolerates higher variance in tibial implant rotation than mobile-bearing designs

Archives of Orthopaedic and Trauma Surgery
Cem OzcanMurat Bozkurt

Abstract

UKA necessitates a learning period. From this point of view, it would be logical to prefer the design that tolerates suboptimal tibial rotations better, especially for inexperienced surgeons. The aim of this study was to evaluate and compare the clinical and radiological results of mobile-bearing and fix-bearing UKA designs in case of suboptimal tibial rotations. A retrospective case-control evaluation was made of all the patients with medial compartment osteoarthritis, treated between January 2011 and January 2015. 324 patients ideal femoral rotation were enrolled in the study. 153 patients (Group 1) were treated with fix-bearing design with a mean 28.8 ± 11.3 month follow-up and 171 patients (Group 2) were treated with mobile-bearing design with a 31 ± 14.3 month follow-up. Each patient in groups was subdivided into (A): optimal tibial rotation, (B): external rotation of tibial component > 5°, (C): internal rotation of tibial component > 5° subgroups. WOMAC and KSS scores of each patient at preoperative and postoperative final control were compared between groups and subgroups. No significant differences were determined between the groups in terms of mean follow-up time (p = 0.0612), preoperative WOMAC, and KSS scores (p = 0....Continue Reading

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Citations

Nov 13, 2018·Archives of Orthopaedic and Trauma Surgery·Qidong ZhangWeiguo Wang
Nov 7, 2020·Scientific Reports·Wenchao ZhangTianlong Huang

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