Objective: The aim of this study is to evaluate clinical effects of sandwich bone graft and immediate implant placement in partial edentulous anterior mandible with limited alveolar bone. Methods: From 2002-05 to 2004-03, 8patients with 37 teeth lost in anterior mandible were received sandwich bone graft and 36 implants were placed totally. 24implants were placed at the same time of bone grafin8 and 12 implants were implanted after 4 months. The final restorations were delivered at 3 to 6 months later. Results: The vertical height and horizontal width of mandibular alveolar bone were increased 7.6 mm and 6 mm respectively. All bone grafts survived and all implants osteointegrated and succeeded with a follow-up of 5.3 to 7.1 years. Vertical absorption of bone graft was less than 0.16 mm and periimplant disc bone absorption was less than 0.25 mm respectively. Conclusion: Sandwich bone graft is an effective technique to repair severe bone defect in anterior mandible restoration.%目的:评价下颌前部连续多颗牙缺失伴重度骨缺损,以夹层骨移植,同期进行常规种植的临床效果.方法:2002-05-2004-03北京协和医院口腔种植中心的8例患者,下颌前牙区37颗缺牙位点.行夹层骨移植,同期植入24枚种植体:平均4个月愈合期后再次植入12枚种植体;再经过3～6个月后完成最终修复.结果:术后平均垂直向高度提升7.6 mm,牙槽嵴顶厚度增加6 mm;骨块无坏死;所有种植体实现骨结合.随访5.3～7.1年,非种植区骨块牙槽嵴顶冠根向骨吸收<0.16 mm,种植体周围碟形骨吸收<0.25 mm.结论:夹层骨移植是修复下颌前牙区重度骨缺损的有效方法,并可同期种植,减少了手术次数,缩短了治疗时间.
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