正常牙嵴关系的定义在正中(牙合)时,上颌前部牙嵴稍位于下颌前部牙嵴的唇侧。其后部牙嵴关系为上下牙嵴顶的连线与水平面成80度角。即下牙嵴顶稍位于上牙嵴顶的颊侧(图1)。异常牙嵴关系的定义 The relationship between the normal ridge is defined in the middle (occlusion), the maxillary anterior ridge slightly located in the anterior mandibular ridge of the labia. The posterior ridges of the relationship between the upper and lower crest crest of the connection and the horizontal plane at an 80 degree angle. The lower crest slightly above the buccal crest of the ridge (Figure 1). The definition of abnormal ridge