一般认为无论牙槽萎缩或年龄增长,下颌管及颏孔位置保持稳定。这主要建立在解剖标本研究上。此实验通过比较有牙颌及无牙颌老年妇女中下颌管和颏孔与下颌下缘皮质的距离,论证了二者间区别。 材料和方法 从210名老年妇女中挑选出40名无牙颌伴进行性牙槽萎缩患者与40名残余有10颗或 Generally believed that regardless of alveolar atrophy or age, mandibular tube and mental foramen position remained stable. This is mainly based on anatomical specimens. This experiment demonstrates the difference between the two by comparing the distance between the mandibular canal and the mental foramina and the lower cortical margin of the cadaveric and edentulous elderly women. MATERIALS AND METHODS Forty elder patients with alveolar atrophy were selected from 210 elderly women and 40 with 10 residual or