Abstract：Objective To validate the accuracy and feasibility of personalized femoral prosthesis rotational certification assisted by digital technology in total knee arthroplasty(TKA).Methods From May 2012 to November 2014, 68 patients of severe knee joint degeneration were treated surgically by TKA. Femoral prothesis rotational certification based on the posterior condylar angle (PCA), which was measured by digital software Mimics14.01 according to preoperative CT data, could modulate the lateral rotation angle during the surgery. From September 2010 to October 2012, 62 patients who received the standard TKA were set as a control group. All cases had radiographic knee osteoarthritis above grade Ⅲ according to Kellgren & Lawrence system combined with chronic knee pain and limited range of motion. Subsequently, the multi-slice spiral CT scan and digital calculation were performed to evaluate the accuracy of the placed prosthesis postoperatively.Results The pre-operative PCA was 5.14°±1.59°(range,1.05°-8.26°) in the digital group and 5.47°±1.23°(range,1.97°-8.41°) in the control group. There was no significant difference between the two groups preoperatively(t=1.349, P＞0.05). Femoral prosthesis rotation angle was 0.83°±0.44°(range, 0.03°-2.28°) in the digital group and 3.82°±0.41°(range,0.08°-6.93°) in the control group. There was significant difference between the two groups(t=39.973, P＜0.01). The malrotation rate was 38.7% in the control group, while the digital group was only 10.3%. There was statistic difference between the two groups(χ2=14.420, P＜0.01).Coclusions Femoral prothesis rotational certification based on the PCA, which is measured by digital software Mimics14.01 according to preoperative CT data, can lead to a more personalized and accurate total knee arthroplasty.
马敏, 罗树林, 蔡俊丰, 袁锋, 魏艳辉, 尹峰. 数字技术在全膝关节置换术股骨旋转控制中的应用[J]. 中华解剖与临床杂志, 2014, 19(6): 460-464.
Ma Min, Luo Shulin, Cai Junfeng, Yuan Feng, Wei Yanhui, Yin Feng.. Feasibility study of personalized femoral prosthesis rotational certification assisted by digital technology in total knee arthroplasty. Chinese Journal of Anatomy and Clinics, 2014, 19(6): 460-464.
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