Johnson R M, Hart D L, Simmons E F, Ramsby G R, Southwick W O
J Bone Joint Surg Am. 1977 Apr;59(3):332-9.
The effectiveness of five cervical orthoses in restricting cervical motion was evaluated quantitatively in normal subjects using roentgenograms and overhead photographs made at the extremes of three planes of motion, while the effectiveness of the halo with a plastic body-vest was studied in seven patients with cervical fractures or local fusions. Flexion and extension were measured at each cervical intervertebral joint and combined cervical motion was measured for rotation and lateral bending. The best conventional braces restricted only 45 per cent of flexion-extension at the atlanto-axial joint; the halo restricted 75 per cent. The conventional braces were more effective in the middle and lower portions of the cervical spine. The results may prove to be useful guidelines for the selection of an appropriate orthosis to control motion in different planes and at different levels of the spine.
利用在三个运动平面极限位置拍摄的X线片和俯视图，对五种植入式颈椎矫形器在限制正常受试者颈椎活动方面的有效性进行了定量评估，同时对七名颈椎骨折或局部融合患者使用带有塑料背心的头环的有效性进行了研究。在每个颈椎椎间关节测量屈伸，测量颈椎旋转和侧屈的联合活动。最佳传统支具仅限制寰枢关节屈伸活动的45%；头环限制75%。传统支具在颈椎中下部更有效。这些结果可能为选择合适的矫形器以控制脊柱不同平面和不同节段的活动提供有用的指导。
