Objective To observe the effect of position of occlusal disturbance on condyle track during protrusive movement.
目的研究下颌前伸运动过程中，干扰发生部位对髁突运动轨迹的影响。
Conclusion: Cusp movement inclination is the basic and the most important concept in protrusive balanced occlusion.
结论：牙尖运动斜度是前伸平衡中最基本、最重要的因素。
Results: the focus of protrusive balanced occlusion is relationship between the track of mandibular cusp movement and working incline of maxillary cusp.
结果：牙尖运动斜度等于牙尖工作斜面斜度是获得前伸平衡的首要条件。
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