Nietosvaara Y, Aalto K, Kallio P E
Department of Surgery, Aurora Hospital, Helsinki, Finland.
J Pediatr Orthop. 1994 Jul-Aug;14(4):513-5. doi: 10.1097/01241398-199407000-00018.
In a prospective two-year study on urban (city of Helsinki) Finnish children, 72 acute patellar dislocations were observed. The calculated annual incidence rate was 43/100,000 in children under 16 years. A total of 28 knees (39%) had associated osteochondral fractures. These fractures comprised 15 capsular avulsions of the medial patellar margin and 15 loose intra-articular fragments detached from the patella and/or lateral femoral condyle. The intra-articular fragments were found only after spontaneous relocation of the patella. The femoral fracture constantly involved the edge of the articular surface in the middle third of the condylar arc.
在一项针对芬兰赫尔辛基市城市儿童的为期两年的前瞻性研究中，观察到72例急性髌骨脱位。计算得出16岁以下儿童的年发病率为43/100,000。共有28个膝关节（39%）伴有骨软骨骨折。这些骨折包括15例髌骨内侧缘的关节囊撕脱和15例从髌骨和/或股骨外侧髁分离的关节内游离碎片。关节内碎片仅在髌骨自行复位后才被发现。股骨骨折总是累及髁间弧中三分之一处的关节面边缘。
