颊肌与总义齿的关系早已被认识,一般认为,总义齿抛光面的外形应与颊肌的活动相适应,才能较好地发挥颊肌对总义齿的固位与稳定作用。因此要求上颌总义齿颊侧基托外形制成向上向外而略凹的形状,下颌则制成向下向外的斜凹形,以适应颊肌的固位要求 The relationship between the buccal muscle and the total denture has long been recognized. It is generally believed that the shape of the polished surface of the general denture should be adapted to the activity of the buccal muscle in order to better exert the retention and stabilization effect of the buccal muscle on the total denture. Therefore, it is required that the shape of the base of the maxillary total denture be made upwardly and outwardly slightly concave, and the lower jaw should be made obliquely concave downward and downward so as to meet the requirement of the buccal muscle retention