Title: The application study on the malrotation between tibial and femoral components in TKA
Abstract: Objective It would explore the influencing factors of malrotation alignment of femoral component in TKA.Methods Analyse 80 CT images of normal human knees as subjects.Calculate potential malrotation scales between the femoral component and the tibial component by referencing to forementioned axes and their extent.Results Mark the tibial prosthesis and the femoral prosthesis respectively in total knee arthroplasty and determine the rotational alignment of femoral component referencing to the transepicondylar axis and the line perpendicularity to anterior posterior line amd 3 degrees lateral rotated In the posterior condylar surfaces of the femur separately.The mean rotational mismatch angle between tibial component and femoral component was 4.54°、7.26°、4.88° respectively.Conclusions Respective landmarks were the intrinsic cause of the rotational mismatch in the total knee arthroplasty.The transepicondylar axis can be.chosen as the optimal reference to decide the rotational alignment of the femoral component because of its minimal rotational mismatch between each component.
Key words:
Total knee arthroplasty; Rotation axis; Femur-tibia joint; Femoral epicondyle
Publication Year: 2009
Publication Date: 2009-11-15
Language: en
Type: article
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