Grace J N, Sim F H
Mayo Graduate School of Medicine, Rochester, Minnesota.
Clin Orthop Relat Res. 1988 May(230):168-75.
Patellar fracture after knee arthroplasty was found in 11 patients (12 knees) during a 15-year period. Causes of this fracture include trauma, technical factors, and biophysical factors. The incidence of this infrequent complication was significantly increased after patella resurfacing and revision arthroplasty. Minimally displaced, non-comminuted fractures were immobilized, whereas displaced, comminuted fractures with loose patellar prostheses were treated operatively. At a mean follow-up period of 28 months, the average knee score was 75 points. The average arc of motion was 87 degrees, and six of the 11 patients have returned to their prefracture functional level. Treatment should be individualized on the basis of fracture displacement, comminution, and button fixation.
在15年期间，11例患者（12膝）出现膝关节置换术后髌骨骨折。该骨折的原因包括创伤、技术因素和生物物理因素。髌骨表面置换和翻修关节置换术后，这种罕见并发症的发生率显著增加。无移位、无粉碎的骨折采用固定治疗，而伴有髌骨假体松动的移位、粉碎骨折则行手术治疗。平均随访28个月时，膝关节平均评分为75分。平均活动弧度为87度，11例患者中有6例恢复到骨折前的功能水平。应根据骨折移位、粉碎程度和纽扣固定情况进行个体化治疗。
