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Archives of Orthopaedic and Trauma Surgery

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01-11-2016 | Knee Arthroplasty

Mobile-bearing TKA improved the anteroposterior joint stability in mid-flexion range comparing to fixed-bearing TKA

Authors: Yukihide Minoda, Mitsuhiko Ikebuchi, Shigekazu Mizokawa, Yoichi Ohta, Hiroaki Nakamura

Published in: Archives of Orthopaedic and Trauma Surgery | Issue 11/2016

Abstract

Introduction

Proper anteroposterior (AP) joint displacement is an important indicator of good clinical outcome following total knee arthroplasty (TKA). We hypothesized that a newly introduced mobile-bearing posterior stabilized (PS) prosthesis reduces the AP joint displacement. The aim of this study is to compare the AP joint displacement between a newly introduced mobile-bearing PS TKA in one knee and a conventional fixed-bearing PS TKA in other knee.

Materials and methods

82 knees in 41 patients who had bilateral TKAs were investigated. All the patients received a conventional fixed-bearing PS prosthesis in one knee and a highly congruent mobile-bearing PS prosthesis in the other knee. AP joint displacement was measured using the KT-2000 arthrometer, at 30° and 75° in flexion, at average of 3.3 years after the operation.

Results

AP joint displacements at 30° in flexion were 6 ± 3 mm in the knees with the mobile-bearing PS prosthesis and 9 ± 4 mm in the knee with fixed-bearing PS prosthesis (p < 0.001). AP joint displacements at 75° in flexion were 4 ± 2 mm in the knees with the mobile-bearing PS prosthesis and 6 ± 3 mm in the knee with fixed-bearing PS prosthesis (p < 0.001).

Conclusions

This study suggested that the design of the prosthesis can improve the AP joint stability in mid-flexion range.

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Title: Mobile-bearing TKA improved the anteroposterior joint stability in mid-flexion range comparing to fixed-bearing TKA
Authors: Yukihide Minoda
Mitsuhiko Ikebuchi
Shigekazu Mizokawa
Yoichi Ohta
Hiroaki Nakamura
Publication date: 01-11-2016
Publisher: Springer Berlin Heidelberg
Published in: Archives of Orthopaedic and Trauma Surgery / Issue 11/2016
Print ISSN: 0936-8051
Electronic ISSN: 1434-3916
DOI: https://doi.org/10.1007/s00402-016-2567-9

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Mobile-bearing TKA improved the anteroposterior joint stability in mid-flexion range comparing to fixed-bearing TKA

Abstract

Introduction

Materials and methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Introduction

Materials and methods

Results

Conclusions

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