Methods: By comparing the height of bilateral alveolar bone in 81 patients after overdenture restorration, bone resorption status was observed in conditions with or without roots.

• 方法:通过81例患者覆盖义齿修复后双侧下颌牙槽骨高度的比较,观察在有无牙根保留的情况下,牙槽骨的吸收状况。