Intraoperative mobile-bearing movement in Oxford unicompartmental knee arthroplasty

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA
Kohei KawaguchiSakae Tanaka

Abstract

Mobile-bearing Oxford unicompartmental knee arthroplasty has been used widely and successfully; however, there is no previous research on the intraoperative bearing movement. The purpose of this study was to characterise intraoperative bearing movement and investigate whether bearing movement relates to component positions, bearing size, intraoperative rotational kinematics and clinical results. A trial tibial component, which was scaled every 2 mm, was used to measure the intraoperative movement of the mobile bearings. Bearing movements from 30° flexion to deep flexion were classified into two groups: 30 patients exhibited posterior bearing movement that contacted the lateral wall of the tibial component (Group W), and 37 patients exhibited posterior bearing movement, without contact, or with only transient contact, with the lateral wall (Group S). All mobile bearings moved posteriorly during knee flexion in the anteroposterior direction. In postoperative radiography with the knee flexed, the femoral component in Group W was significantly more laterally implanted than that in Group S. The width ratio between the bearing and tibial component in Group W was significantly greater than in Group S. There were no significant differe...Continue Reading

References

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May 3, 2005·Clinical Orthopaedics and Related Research·Kouichi KanekasuYoshinori Kadoya
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May 4, 2013·BMC Sports Science, Medicine and Rehabilitation·Hiroshi InuiTakumi Nakagawa
Sep 3, 2013·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Seung-Ju KimJong Hun Kim
Dec 3, 2014·The Journal of Arthroplasty·Jason M HurstAdolph V Lombardi
May 4, 2016·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Hiroshi InuiSakae Tanaka
Jun 10, 2016·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Seung-Yup LeeJi-Hoon Bae
Apr 26, 2017·Archives of Orthopaedic and Trauma Surgery·Tilman WalkerTobias Gotterbarm

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