目的：探讨前伸平衡的相关因素及各因素间的相互关系。
Objective: The experiment was designed to study the condition for achieving protrusive balanced occlusion and the factors involved in occlusal equilibration.
结论：牙尖运动斜度是前伸平衡中最基本、最重要的因素。
Conclusion: Cusp movement inclination is the basic and the most important concept in protrusive balanced occlusion.
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。
Results: the focus of protrusive balanced occlusion is relationship between the track of mandibular cusp movement and working incline of maxillary cusp.
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