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Journal of Orthopaedic Science

Published in:

01-07-2014 | Original Article

Change in tibiofemoral rotational alignment during total knee arthroplasty

Authors: Satoshi Watanabe, Takashi Sato, Go Omori, Yoshio Koga, Naoto Endo

Published in: Journal of Orthopaedic Science | Issue 4/2014

Abstract

Background

Rotational mismatch between femoral and tibial components has been recognized as a risk factor of unsuccessful total knee arthroplasty (TKA), but a main cause of rotational mismatch is uncertain. This study aims to evaluate rotational alignment of the knee by measuring both component rotation and version of the knee in TKA.

Method

Fifty-one TKAs (mean age 73.7 years) were included in this study. The three dimensional, weight-bearing knee alignment was measured before and after TKA. A transepicondylar axis was referenced to femoral component rotation, and an anteroposterior axis of the tibia (middle of posterior cruciate ligament attachment to medial border of patella tendon attachment) was referenced to tibial component rotation. Knee rotational angle was defined as the angle between these two axes.

Result

The mean preoperative knee rotation angle of 9.7° (±8.5°) internal rotation was significantly reduced to 1.8° (±7.3°) external rotation after TKA. Twenty-one of 51 knees (41 %) exhibited rotational mismatch (>10°) preoperatively, and this number was reduced to eight knees (16 %) post-TKA. The femoral component was rotationally aligned within 5° of neutral in all knees, while rotational alignment of the tibial component showed a high degree of variability (range 20.7° internal rotation to 17.2° external rotation).

Conclusion

Rotational malposition of the tibial component was considered to be a main factor of rotational mismatch of the knee after TKA.

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Title: Change in tibiofemoral rotational alignment during total knee arthroplasty
Authors: Satoshi Watanabe
Takashi Sato
Go Omori
Yoshio Koga
Naoto Endo
Publication date: 01-07-2014
Publisher: Springer Japan
Published in: Journal of Orthopaedic Science / Issue 4/2014
Print ISSN: 0949-2658
Electronic ISSN: 1436-2023
DOI: https://doi.org/10.1007/s00776-014-0565-8

ACC 2024 Congress

Springer Medicine

Change in tibiofemoral rotational alignment during total knee arthroplasty

Abstract

Background

Method

Result

Conclusion

ACC 2024 Congress

Springer Medicine

Abstract

Background

Method

Result

Conclusion

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