Ando T
Department of Orthopaedic Surgery, Yashima General Hospital, 1857-1 Yashima-nishi, Takamatsu 761-0113, Japan.
J Orthop Sci. 1999;4(2):73-7. doi: 10.1007/s007760050077.
We devised a method to measure the Q-angle (the angle between the rectus femoris and the patellar ligament), using computed tomography (CT), in 1993. In this study, I investigated the lateral shift at each point forming the angle as factors affecting the Q-angle. The study group consisted of 83 patients with recurrent patellar dislocation (83 lower limbs) and a control group of 55 healthy people (55 lower limbs). A lateral shift was found in the anterosuperior iliac spine (ASIS) in the dislocation group compared with the control group (P < 0.01). A lateral shift was also found in the anteroinferior iliac spine (AIIS) in the dislocation group compared with the control group (P < 0.05). A medial shift was found in the bottom of the groove of the femoral condyle in the dislocation group compared with the control group (P < 0.001). A lateral shift was also seen in the tibial tubercle of the dislocation group in comparison with the control group (P < 0.0001). Lateral shift of the tibial tubercle may be the main factor influencing the Q-angle, as measured by CT.
1993年，我们设计了一种利用计算机断层扫描（CT）测量Q角（股直肌与髌韧带之间的夹角）的方法。在本研究中，我研究了构成该角度的各点的外侧移位作为影响Q角的因素。研究组由83例复发性髌骨脱位患者（83条下肢）组成，对照组为55名健康人（55条下肢）。与对照组相比，脱位组的髂前上棘（ASIS）出现外侧移位（P < 0.01）。与对照组相比，脱位组的髂前下棘（AIIS）也出现外侧移位（P < 0.05）。与对照组相比，脱位组的股骨髁沟底部出现内侧移位（P < 0.001）。与对照组相比，脱位组的胫骨结节也出现外侧移位（P < 0.0001）。通过CT测量，胫骨结节的外侧移位可能是影响Q角的主要因素。
