Rotational Alignment of the Femoral Component in the Knees with Varus Deformities:a CT evalua-tion
Abstract：Objective To analyze the rotational alignment of distal femoral on CT scans of the normal knees and osteoar-thritis knees with varus deformities,and to identify whether PCL,AP axis and FAT line are reliable for determining rotational a-lignment in varus knees. Methods One hundred and eight knees underwent CT were included in this study,and were divided into three groups(Group A,normal knees,n = 30;Group B,mild varus,n = 47;Group C,severe varus,n = 31). SEA,PCL,AP axis and AFA were located respectively in different slices,then PCA,ASA and FSA were measured,and these angles were com-pared between 3 groups. Results The values of PCA in Group C was significantly less than that in Group A and Group B,but there was no statistical differences between Group A and Group B. There were no significant differences between the three groups in the values of ASA and FSA. Conclusion This study indicates that the PCA is not reliable for femoral rotational a-lignment in severe varus knees. ASA and FSA are not affected by osteoarthritis,however the variation of values suggests that the AP axis should be used with caution,and the AFA is a stable axis as a rotational assessment guide.
Keywords：total knee arthroplastyrational alignment of implantknee varus deformityimage analyzes
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 702-705 )