本研究通过对无牙下颌牙槽嵴基托区及在此区内的三个区域的面积计算,得出结论:大的牙槽嵴之所以比小的好,主要是由舌翼区组成的稳定区所起的作用比承托区大。材料及方法:将收集的无牙下颌模型标上号,随机抽样选150个,修整模型基底使之与牙槽嵴顶间平面平行,并包括磨牙后垫及外斜嵴。模型基底外围在印模边缘外2 mm, In this study, we calculated the area of ​​the toothless mandible alveolar crest base and the three areas in the area, and concluded that the larger alveolar ridge is better than the lesser, mainly composed of the lingual wing area Stabilization zone plays a greater role than the supporting area. MATERIALS AND METHODS: The toothless mandibular model collected was marked with 150 samples randomly selected to trim the model base parallel to the alveolar crest and included the posterior molar pad and external oblique ridge. The periphery of the model substrate is 2 mm outside the die edge,