Department of Periodontology, Fluminense Federal University, Rio de Janeiro, Brazil.
Implant Dent. 2010 Feb;19(1):2-7. doi: 10.1097/ID.0b013e3181cda72c.
The biologic principle of guided bone regeneration has been successfully used to prevent bone loss in extraction sites. This study comprises 420 cases of alveolar ridge maintenance in preparation for dental implant placements. Nonexpanded polytetrafluoroethylene membranes were positioned over all extraction sites and left intentionally exposed. Lyophilized mineralized bone allografts were used to prevent membrane collapse when buccal bone walls were lost. Membranes were removed at week 4. At the time of implant placements, all sites presented soft tissue compatibility with keratinized gingiva. The mucogingival junction position seemed to be preserved. Exposed nonexpanded polytetrafluoroethylene membranes associated, or not, with bone graft provide tissue formation suitable for implant placement.
引导骨再生的生物学原理已成功用于防止拔牙部位的骨质流失。本研究包括 420 例牙槽嵴维持，以准备牙种植体植入。所有拔牙部位均放置未扩展聚四氟乙烯膜，并故意暴露。当颊骨壁丢失时，使用冻干矿化骨同种异体移植物防止膜塌陷。第 4 周时去除膜。在植入物放置时，所有部位的软组织与角化龈相容。龈粘膜联合位置似乎得到保留。暴露的未扩展聚四氟乙烯膜与骨移植结合或不结合可提供适合种植体放置的组织形成。
