Abstract:
Aims:Commonly performed unicompartmental knee arthroplasty (UKA) is not designed for the lateral compartment. Additionally, the anatomical medial and lateral tibial plateaus have asymmetrical geometries, with a slightly dished medial plateau and a convex lateral plateau. Therefore, this study aims to investigate the native knee kinematics with respect to the tibial insert design corresponding to the lateral femoral component. Methods:Subject-specific finite element models were developed with tibiofemoral (TF) and patellofemoral joints for one female and four male subjects. Three different TF conformity designs were applied. Flat, convex, and conforming tibial insert designs were applied to the identical femoral component. A deep knee bend was considered as the loading condition, and the kinematic preservation in the native knee was investigated. Results:The convex design, the femoral rollback, and internal rotation were similar to those of the native knee. However, the conforming design showed a significantly decreased femoral rollback and internal rotation compared with that of the native knee (p < 0.05). The flat design showed a significant difference in the femoral rollback; however, there was no difference in the tibial internal rotation compared with that of the native knee. Conclusion:The geometry of the surface of the lateral tibial plateau determined the ability to restore the rotational kinematics of the native knee. Surgeons and implant designers should consider the geometry of the anatomical lateral tibial plateau as an important factor in the restoration of native knee kinematics after lateral UKA.Cite this article:Bone Joint Res 2019;8:593-600.
journal_name
Bone Joint Resjournal_title
Bone & joint researchauthors
Koh YG,Lee JA,Lee HY,Kim HJ,Chung HS,Kang KTdoi
10.1302/2046-3758.812.BJR-2019-0114.R1subject
Has Abstractpub_date
2020-01-08 00:00:00pages
593-600issue
12issn
2046-3758pii
10.1302_2046-3758.812.BJR-2019-0114.R1journal_volume
8pub_type
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journal_title:Bone & joint research
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更新日期:2021-01-01 00:00:00