Jingjit Warakorn, Poomcharoen Pakpoom, Limmahakhun Sakkadech, Klunklin Kasisin, Leerapun Taninnit, Rojanasthien Sattaya
J Med Assoc Thai. 2014 Dec;97(12):1314-8.
To perform total knee arthroplasty, some surgeons prefer to use a fixed valgus angle, for example 5° or 6°, for the distal femoral cut with every patient. This angle may be appropriate for some patients, but may not be for all.
To determine the proper angle of the distal femoral cut during total knee arthroplasty (TKA) in Thai patients with osteoarthritis of the knee.
A cross-sectional study was conducted of 80 osteoarthritic knees of 50 Thai patients with a mean age of 69 years (range 52-82, SD 7.64) who had received total knee arthroplasty at Chiang Mai University Hospital between January 2011 and March 2013. The femoral mechanical-anatomical (FMA) angle, femorotibial (FT) angle, mechanical femorotibial (MFT) angle, femoral bowing angle, femoral length, hip offset, gender, and age of the patients were analysed using multivariate regression analysis.
Average FMA angle was 6.46° (range 4°-10°, SD 1.26°). The FMA angle was 6.85° and 5.28° in patients with varus and valgus deformity, respectively. Fifteen percent of all patients showed a FMA angle either less than 5° or greater than 7°.
The average FMA angle of patients with gonarthrosis was 6.46°. If it is not possible to measure the FMA angle in Thai patients, 7° valgus cut angle is recommended for patients with varus deformity. Variation in this angle was high. Pre-operative measurement of FMA angle is beneficial for precise TKA.
为进行全膝关节置换术，一些外科医生倾向于对每位患者的股骨远端截骨采用固定的外翻角度，例如5°或6°。这个角度可能对某些患者合适，但并非对所有患者都合适。
确定泰国膝关节骨关节炎患者全膝关节置换术（TKA）中股骨远端截骨的合适角度。
对2011年1月至2013年3月在清迈大学医院接受全膝关节置换术的50例泰国患者的80个骨关节炎膝关节进行了横断面研究。这些患者平均年龄69岁（范围52 - 82岁，标准差7.64）。使用多变量回归分析对患者的股骨机械解剖（FMA）角、股胫（FT）角、机械股胫（MFT）角、股骨弯曲角、股骨长度、髋关节偏移、性别和年龄进行分析。
平均FMA角为6.46°（范围4° - 10°，标准差1.26°）。内翻和外翻畸形患者的FMA角分别为6.85°和5.28°。所有患者中有15%的FMA角小于5°或大于7°。
膝关节病患者的平均FMA角为6.46°。如果无法测量泰国患者的FMA角，对于内翻畸形患者建议采用7°外翻截骨角。该角度的变异性较高。术前测量FMA角有利于精确的全膝关节置换术。
