Abstract: As a common intraoral bone donor site in clinic, mandibular ramus can effectively improve the small and medium-sized alveolar bone defects caused by various reasons in maxillofacial region. Based on the anatomy and characteristics of mandibular ramus, this paper discussed the clinical acceptability, potential bone supply，postoperative reaction and the possibility of secondary bone supply of mandibular ramus. And the measures to reduce postoperative adverse reactions were summarized.

Key words: mandibular ramus, bone augmentation surgery, autogenous bone graft