论文部分内容阅读
覆盖义齿是基托覆盖在天然牙或已经处理的牙根上的全口或部份活动义齿。由于经过细致的牙髓治疗和根管充填,不存在病灶感染的危害,将松动牙齿的临床牙冠磨短或齐龈锯断,改变冠根长度比例后,患牙将较为稳固,可以不拔牙或少拔依照常规必需拔去的牙齿并留作基牙,可提早修复,并可维持牙槽骨的丰满度。Loislle等发现保留牙根的患者其牙嵴的高度在2～3年内无明显改变,而一般义齿在第1年内平均减少4 mg,Crum等观察5年发现戴下颌一般总义齿的病人其牙槽骨吸收较覆盖义齿多8倍。保留牙根尚可减轻基托对软组织的损伤,增加义齿的稳定和固位作用,保存了牙周膜的本体感受器,能分辨(牙合)力大小方
Overdenture is a complete or partial removable denture that covers the base tooth or the treated root. Because after careful endodontic treatment and root canal filling, there is no risk of focal infection, the loose dental crown or shortening of the clinical alveolar gingiva sawing change crown crown length ratio, the affected teeth will be more stable, you can not pull the tooth Or less pull in accordance with the conventional need to pull out the teeth and leave the abutment, can be restored earlier, and can maintain the fullness of alveolar bone. Loislle et al found that the height of the crest of the patients with retained roots did not change significantly in 2 ~ 3 years, while the average denture decreased 4 mg in the first year. Crum et al observed that the alveolar bone of patients with mandibular general denture Absorb more than covered overdenture 8 times. Preserving the root can still reduce the base of soft tissue damage, increase the stability and retention of the denture, preserved periodontal membrane ontology sensor, able to distinguish (occlusal) force size