无牙颌病人牙槽嵴广泛吸收,使牙槽嵴变低变窄、凹陷或呈刀刃状,义齿基托与牙槽嵴附着面缩小,影响义齿固位,不能达到恢复咀嚼功能的目的。当下颌骨严重萎缩时,下颌骨下缘厚度可少于1 cm,甚至经不起正常咀嚼压力,而出现自发性骨折。这些病人需要用手术的方法使牙槽嵴加高,才能获得满意的义齿修复效果。近年来,对口腔硬、软组织的各种矫正方法的发展,为病人提供了镶牙一手术联合修复的方法,为支持义齿行使功能提供一个合适的硬、软组织结构。本文将近年来前庭沟成形术和牙槽嵴加高术的发展和外科手术方法作一介绍。一、牙槽骨萎缩的原因无牙颌病人牙槽骨吸收的速度,与失牙原因、失牙时间、骨质致密程度以及全身健 Edentulous patients with extensive absorption of the alveolar ridge, the alveolar ridge becomes narrow, concave or was knife-shaped, denture base and alveolar ridge attachment surface narrowed, affecting denture retention, can not achieve the purpose of restoring chewing function. When the mandible serious atrophy, mandibular lower edge of the thickness of less than 1 cm, or even can not withstand the normal chewing pressure, and spontaneous fracture. These patients require surgery to raise the alveolar ridge in order to obtain satisfactory denture repair. In recent years, the development of various correction methods for oral hard and soft tissue provides the patient with a method of denture-surgery combined repair, which provides a suitable hard and soft tissue structure for supporting the function of the denture. In this paper, the development of forefoot trenches and alveolar ridge augmentation surgery and surgical methods for an introduction. First, the causes of alveolar atrophy Edentulous patients alveolar bone absorption rate, and loss of teeth causes, loss of teeth time, the degree of bone density and body health