Hou Zhengang, Feng Hailan, Li Guozhen
Department of Prosthodontics, Peking University School of Stomatology, Beijing 100081, China.
Zhonghua Kou Qiang Yi Xue Za Zhi. 2002 Mar;37(2):116-9.
To investigate the variation in movement traces of different condylar reference points.
In 30 healthy subjects, mandibular movements were recorded during protrusion and open-closing of the jaw. The kinematic center and terminal hinge axis point of the condyle were used as reference points.
The kinematic center was located anteriorly and superiorly with respect to the terminal hinge axis point. The trace distance of the kinematic center was longer than that of the terminal hinge axis point of the condyle during opening. In contrast to differences in trace distances of the left and right condylar terminal hinge axis points, no such left-right differences were found for the kinematic centers. The ratio between the distance of opening trace and the distance of protrusion trace of the kinematic center was above 1.5.
In comparison to the terminal hinge axis, the kinematic center shows fewer variations in the movement traces.
研究不同髁突参考点运动轨迹的变化。
选取30名健康受试者，记录其下颌前伸及开闭颌运动。以髁突的运动中心和终末铰链轴点作为参考点。
运动中心相对于终末铰链轴点位于前方和上方。开口时，运动中心的轨迹距离长于髁突终末铰链轴点的轨迹距离。与左右髁突终末铰链轴点的轨迹距离差异不同，运动中心未发现左右差异。运动中心开口轨迹距离与前伸轨迹距离之比大于1.5。
与终末铰链轴相比，运动中心的运动轨迹变化较少。
