无牙颌(edentulous jaw)是指各种原因导致的上颌或(和)下颌牙列缺失后的颌骨[1],常规使用全口活动义齿修复。然而针对牙弓内仅存个别患牙的情况,如果患牙经过牙髓、牙周的系统治疗后可利用,覆盖义齿修复则是常用修复方式。但由于大多数牙齿缺失、牙槽嵴萎缩,致使义齿的固位力十分有限,患者修复后咀嚼效果仍然不理想。另 Edentulous jaw (edentulous jaw) refers to the various causes of the maxillary or (and) mandibular dentition missing jaw [1], the routine use of full denture repair. However, in the case of the only remaining teeth in the dental arch, if the affected tooth passes through the dental pulp, the periodontal system can be used after treatment, and the overdenture repair is the commonly used repair method. However, due to the loss of most teeth, the atrophy of the alveolar ridge, resulting in a very limited retention of the denture, the effect of chewing after the patient is still not ideal. another