从1916年到现在均认为缺牙后,上颌骨吸收的方向是向上向内,故上颌骨逐渐变小;而下颌骨则因舌侧骨板吸收较多,故下颌骨逐渐变宽。本文的目的是研究无牙颌病人上下颌弓后部宽度的差异。用Boley尺测量。上颌弓的宽度从两侧上颌结节的前部测量,下颌弓的宽度从两侧磨牙后垫前部测量。测量了100 From 1916 until now are considered missing teeth, the direction of maxillary absorption is upward inward, so the upper jaw gradually becomes smaller; and the mandible is absorbed because of the lingual plate more, so the mandible gradually widened. The purpose of this article is to study the difference in the width of the posterior jaw of the maxillary mandible in edentulous patients. Measure with Boley ruler. The width of the maxillary arch was measured from the anterior portion of the maxillary tuberosity on both sides, and the width of the mandibular arch was measured from the anterior portion of the posterior pad of both molars. Measured 100