Freeman M A, Hammer A
Arch Orthop Trauma Surg (1978). 1978 Aug 11;92(1):63-7. doi: 10.1007/BF00381642.
Four cases are reported of spontaneous fracture of the patella after ICLH replacement of the knee for Rheumatoid Arthritis. Three of these occur-red in patellae that had not themselves been replaced; one in a resurfaced patella. The former required no specific treatment but the latter required revision surgery. It is argued that the existence of this complication may represent a contra-indication to patellar replacement in the osteoporotic rheumatoid knee.
报告了4例类风湿性关节炎患者在进行膝关节表面置换术后髌骨自发性骨折的病例。其中3例发生在未进行过髌骨置换的患者中；1例发生在已进行髌骨表面置换的患者中。前者无需特殊治疗，而后者需要翻修手术。有人认为，这种并发症的存在可能是骨质疏松性类风湿性膝关节进行髌骨置换的禁忌症。
