Tasker T, Waugh W
J Bone Joint Surg Br. 1982;64(4):486-8. doi: 10.1302/0301-620X.64B4.7096428.
A prospective study was made of 100 knees which had been operated on for various kinds of internal derangement. An observer, who did not know the clinical condition of the knee, recorded whether or not there were articular lesions of the femoral condyles. Lesions were found to be localised to a triangular area on the medial condyle and to a strip on the lateral condyle. Similar lesions have been described in association with flexion deformities in rheumatoid and osteoarthritic knees. Lesions were found in 49 out of 50 knees which had been locked for more than three days. They were also found in 29 knees in which there appeared to be full extension before operation, but where there was either a torn meniscus with a history of intermittent locking or serious anterolateral instability. In these cases it was considered that the final "screw-home" mechanism of full extension had been lost. Lesions were not present in 10 knees which appeared locked, but in nine of these the interval between injury and operation was less than three days. Lesions were not found in eight knees where there was full extension and no history of locking or instability. In four knees with a plica syndrome similar lesions were present.
对100个因各种关节内紊乱而接受手术的膝关节进行了一项前瞻性研究。一名不了解膝关节临床状况的观察者记录了股骨髁是否存在关节病变。发现病变局限于内侧髁的一个三角形区域和外侧髁的一个条带。在类风湿性和骨关节炎膝关节中，类似病变与屈曲畸形有关。在50个被锁定超过三天的膝关节中，有49个发现了病变。在29个术前似乎能完全伸直，但存在半月板撕裂并有间歇性锁定病史或严重前外侧不稳定的膝关节中也发现了病变。在这些病例中，认为完全伸直的最终“锁定”机制已经丧失。在10个看似锁定的膝关节中未发现病变，但其中9个受伤与手术之间的间隔不到三天。在8个能完全伸直且无锁定或不稳定病史的膝关节中未发现病变。在4个患有滑膜皱襞综合征的膝关节中存在类似病变。
