关键词: 位点保存, 拔牙, 骨吸收, 牙槽骨, 植骨材料

Abstract:

Ridge preservation after tooth extraction is a series of clinical treatments aiming at limiting alveolar bone resorption during or after tooth extraction and stimulating new bone formation in alveolus. Presently，guided tissue regeneration technique is often applied together with guided bone regeneration clinically，combined with techniques such as instant implantation and atraumatic extraction，to reinforce both the rehabilitation of bone tissue and soft tissue as well as their regeneration. This paper primarily discusses the periodontal biological changes after tooth extraction，the concept and methods of ridge preservation，biological material concerned as well as the progress achieved in ridge preservation domain.

Key words: ridge preservation, tooth extraction, bone resorption, alveolar bone, graft materials