McIvor J B, Gillespie R
J Pediatr Orthop. 1987 Sep-Oct;7(5):553-6. doi: 10.1097/01241398-198709000-00010.
Forty-three ipsilateral knees in 41 juvenile amputees were studied for determination of the extent and severity of patellar instability. The amputation was performed for trauma in 13 patients and congenital anomalies in 28 patients. Eleven patients had instability, and three had patellofemoral pain. All symptomatic patients had patella alta, lateral subluxation, and hypoplastic patellae on radiographs. Of the asymptomatic patients, 68% had patella alta, and 35% had hypoplasia. Amputees with patella alta had more below-knee amputations and had worn prostheses longer. It is hypothesized that the pressure of the prosthesis on the patellar tendon may lead to patella alta and predispose to instability.
对41名青少年截肢者的43个同侧膝关节进行了研究，以确定髌骨不稳定的程度和严重性。13例患者因创伤行截肢术，28例患者因先天性畸形行截肢术。11例患者存在不稳定，3例有髌股关节疼痛。所有有症状的患者在X线片上均显示髌骨高位、外侧半脱位和髌骨发育不全。在无症状的患者中，68%有髌骨高位，35%有发育不全。髌骨高位的截肢者膝下截肢更多，佩戴假肢的时间更长。据推测，假肢对髌腱的压力可能导致髌骨高位并易发生不稳定。
