Dependability of trochlear line as femoral rotation osteotomy axis in total knee arthroplasty

VernacularTitle:股骨滑车轴作为全膝置换股骨旋转截骨轴线的可靠性评估
Author: Rongbin SUN ; Yuji WANG ; Nanwei XU
Publication Type:Journal Article
Keywords: Knee,replacement; Femoral fractures; Trochlear line
From: Chinese Journal of Trauma 2012;28(3):243-246
CountryChina
Language:Chinese
Abstract: ObjectiveTo probe into the dependability of trochlear line (TL) as the reference axis for femoral component rotation in total knee arthroplasty.MethodsEighty-nine healthy adults had computed tomography (CT) scan for knees to position the surgical transepicondylar axis (STEA),posterior condylar line (PCL) and TL on the transverse sections.In the meantime,the angles including angle between TL and STEA (TSA),angle between TL and PCL (TPA) and angle between PCL and STEA (PCA) were measured and compare the dependability of TSA and PCA.ResultsThe TSA,TPA and PCA were (6.77 ± 3.12) °,(4.22 ± 2.64) ° and (2.95 ± 1.77) °,respectively.Three types of angles showed no statistical differences between males and females or between right knees and left knees (P ＞0.05).Rank sum test displayed significant differences in the overall distributions of three kinds of angles ( HC =66.837,P ＜0.01 ).The coefficient of variation of TSA was insignificant,but the standard variation was significant (3.12°).ConclusionTL can be considered only as the subsidiary femoral rotation osteotomy axis in total knee arthroplasty.