牙周疾患时,往往造成牙槽骨的垂直性吸收。由于垂直性吸收则形成骨下袋。骨下袋表示骨的吸收状态,通常按残留牙槽骨壁的数来分类,一般以一二三壁破坏来表示。随着骨吸收的进展使剩余牙槽骨壁数逐渐减少。在临床上,对于三壁性骨缺损,常用去除病因和外科方法进行处治。这种外科处治后的牙周修复情况曾用猴子作过若干实验, Periodontal disorders often result in vertical absorption of alveolar bone. Due to the vertical absorption is formed under the bag. Bone under the bag that bone absorption state, usually according to the number of residual alveolar bone wall to the classification, usually to one two three wall damage to that. With the progress of bone resorption, the number of remaining alveolar bone walls gradually decreases. Clinically, for the three wall defects, commonly used to remove the cause and surgical treatment. This surgical treatment of periodontal restoration has done a number of experiments with the monkey,