全膝关节置换术股骨远端外翻角影响因素探讨

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Abstract Objective: To measure distal femoral valgus resection and determine influential factors in patients undergone total knee arthroplasty. Methods: Two hundred and twenty two patients planned to undergo primary TKA from February first 2012 to February first 2014 in the First Affiliated Hospital of Wenzhou Medical University were included. The clinical data of age, gender, height, weight, body mass index and the radiographic data of distal femoral valgus resection, femoral length, femoral neck length, femoral shaft-neck angle, femoral bowing angle and mechanical lateral distal femoral angle were recorded and analyzed. Results: The mean distal femoral valgus angle was 6.66°±2.06° (range: 2.78°-12.84°). The femoral bowing angle was the factor that showed the strongest correlation with this angle (r= 0.845, P<0.01). The mechanical lateral distal femoral angle and age showed only a weak correlation (r=0.377, 0.446, P<0.01), and other parameters showed no correlation (P>0.05). Apparent femoral bowing angle (>3° of bowing) was found in 84 (37.8%) cases. Cases with apparent femoral bowing had statistically significant higher potential cutting error than cases with non-femoral bowing when a 5° or 6° distal femoral valgus angle was chosen (P<0.05). Conclusion: Chinese races’ distal femoral valgus angles are mainly influenced by femoral bowing among femoral deformities in the coronal plane. Therefore, it is necessary to measure the distal femoral valgus angle preoperatively from coronal radiographs covering the whole femur.

Key words： knee arthroplasty femoral bowing distal femoral valgus resection

Received: 02 December 2015

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	WU Peng
	LANG Junzhe
	LIU Yangbo
	CHEN Lei.

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https://xb.wmu.edu.cn/EN/ OR https://xb.wmu.edu.cn/EN/Y2016/V46/I12/878

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