Lee W Y, Okeson J P, Lindroth J
Orofacial Pain Clinic, Department of Orthodontics, Wonju Christian Hospital, Yonsei University, Korea.
J Orofac Pain. 1995 Spring;9(2):161-7.
This study investigated the relationship between forward head posture and temporomandibular disorder symptoms. Thirty-three temporomandibular disorder patients with predominant complaints of masticatory muscle pain were compared with an age- and gender-matched control group. Head position was measured from photographs taken with a plumb line drawn from the ceiling to the lateral malleolus of the ankle and with a horizontal plane that was perpendicular to the plumb line and that passed through the spinous process of the seventh cervical vertebra. The distances from the plumb line to the ear, to the seventh vertebra, and to the shoulder were measured. Two angles were also measured: (1) ear-seventh cervical vertebra-horizontal plane and (2) eye-ear-seventh cervical vertebra. The only measurement that revealed a statistically significant difference was angle ear-seventh cervical vertebra-horizontal plane. This angle was smaller in the patients with temporomandibular disorders than in the control subjects. In other words, when evaluating the ear position with respect to the seventh cervical vertebra, the head was positioned more forward in the group with temporomandibular disorders than in the control group (P < .05).
本研究调查了头部前倾姿势与颞下颌关节紊乱症状之间的关系。将33例以咀嚼肌疼痛为主要主诉的颞下颌关节紊乱患者与一个年龄和性别匹配的对照组进行比较。通过从天花板向踝关节外侧髁绘制铅垂线，并使用与该铅垂线垂直且经过第七颈椎棘突的水平面，从拍摄的照片中测量头部位置。测量从铅垂线到耳朵、到第七颈椎以及到肩膀的距离。还测量了两个角度：（1）耳朵-第七颈椎-水平面和（2）眼睛-耳朵-第七颈椎。唯一显示出统计学显著差异的测量值是耳朵-第七颈椎-水平面角度。颞下颌关节紊乱患者的这个角度比对照组小。换句话说，在评估耳朵相对于第七颈椎的位置时，颞下颌关节紊乱组的头部比对照组更向前倾（P <.05）。
