Simonian P T, Mann F A, Mandt P R
Department of Orthopaedic Surgery, Virginia Mason Medical Center, Seattle, Washington, USA.
Am J Knee Surg. 1995 Spring;8(2):60-4; discussion 64-5.
Patella fracture is either an infrequent or underreported complication after anterior cruciate ligament (ACL) reconstruction using a portion of the patellar ligament. Patella fracture pattern has been related to the mechanism of injury. Direct fractures resulting from impaction forces delivered to the patella are typically stellate or comminuted. Indirect fractures resulting from tensile stresses applied across the extensor mechanism typically are displaced transverse disruptions. After ACL reconstruction using a portion of the patellar ligament, Y-shaped stellate fractures can occur. Fracture pattern seems related to the time elapsed since the harvest; stellate fractures occur following stumbles or slips without direct injury early in the postoperative period while transverse fractures occur late. This article describes two cases of patella stellate fractures that occurred in patients who underwent ACL reconstruction using patellar graft.
在使用部分髌韧带进行前交叉韧带（ACL）重建后，髌骨骨折是一种不常见或报道不足的并发症。髌骨骨折类型与损伤机制有关。传递至髌骨的撞击力导致的直接骨折通常为星芒状或粉碎性骨折。通过伸肌机制施加的拉应力导致的间接骨折通常为移位的横行断裂。在使用部分髌韧带进行ACL重建后，可发生Y形星芒状骨折。骨折类型似乎与取材后经过的时间有关；星芒状骨折发生在术后早期因绊倒或滑倒而无直接损伤的情况下，而横行骨折发生较晚。本文描述了两例在使用髌腱移植物进行ACL重建的患者中发生的髌骨星芒状骨折病例。
