【用戶】麵線
【年級】高一上
【評論內容】(D)解釋:來自Carranza原文:Bone From Extraoral SitesThe use of fresh or preserved iliac cancellous marrow bone has been extensively investigated. This material has been used by orthopedic surgeons for years. Data from human and animal studies support its use, and the technique has proved successful in osseous defects with various numbers of walls. It has also been successful in furcations and even supracrestally to some extent.However, because of numerous problems associated with its use, the technique is no longer in use.Some of the problems were postoperative infection, bone exfoliation, seque...