Kuwahara T, Miyauchi S, Maruyama T
J Osaka Univ Dent Sch. 1989 Dec;29:87-102.
To investigate the relationship between mastication and TMJ abnormalities, the incisal point and condylar movements during mastication were analysed in two normal subjects and six patients with stomatognathic dysfunction. The patients with stomatognathic dysfunction were two patients with unilateral anterior disk displacement with reduction, two with unilateral anterior disk displacement without reduction, and two with unilateral osteoarthritis. The incisal point movement was recorded using Sirognathograph Analysing System, and condylar movement was recorded with a pantograph. The movement path of the non-working condyle was shorter than that of the working condyle when patients with unilateral TMJ abnormalities used their non-abnormal side to chew, which resulted in deviation of the turning point (the point where the mouth changes from opening to closing) to the non-chewing side. Also, the convexity of the opening path was influenced by the condylar mobility of the abnormal side TMJ. Posterior dislocation of the condyle of the abnormal side TMJ resulted in a crossover chewing pattern of incisal point movement in the frontal or horizontal planes.
为研究咀嚼与颞下颌关节异常之间的关系，对两名正常受试者和六名口颌功能障碍患者咀嚼过程中的切牙点和髁突运动进行了分析。口颌功能障碍患者包括两名单侧可复性盘前移位患者、两名单侧不可复性盘前移位患者和两名单侧骨关节炎患者。使用Sirognathograph分析系统记录切牙点运动，并用面弓记录髁突运动。当单侧颞下颌关节异常的患者用其正常侧咀嚼时，非工作侧髁突的运动路径比工作侧髁突的运动路径短，这导致转折点（即嘴巴从张开变为闭合的点）向非咀嚼侧偏移。此外，开口路径的凸度受异常侧颞下颌关节髁突活动度的影响。异常侧颞下颌关节髁突后脱位导致切牙点运动在额面或水平面出现交叉咀嚼模式。
