下颌骨取骨onlay植骨改善种植骨量不足的临床研究

Clinical Analysis of Reconstruction of Bone Defects for Dental Implants with Onlay Bone Grafts from Mandible Donor

目的:评价应用下颌骨取骨onlay植骨改善种植术前重度萎缩牙槽嵴的手术方法及疗效。方法:18例患者接受了下颌骨来源的onlay植骨术,手术同期或术后4～6个月共植入22颗种植体,并于术后4～6个月暴露种植体,最终完成烤瓷冠修复。结果:植骨术后无并发症发生,2例骨吸收较明显,其余均顺利植入种植体,二期手术时骨吸收平均20%。所有病例均最终完成种植修复,观察6～28个月,无种植体脱落。结论:下颌骨取骨onlay植骨修复重度萎缩的牙槽嵴操作简便,效果可靠。

Objective: To evaluate the surgical methods and treatment effects of reconstruction of bone defects for dental implants with onlay bone grafts from intro-oral donor. Methods: 18 consecutive patients underwent onlay bone grafting from autogenous mandible. 22 implants were inserted 4-6 months later or simultaneously. The implants were exposed and final porcelain restorations were made 4-6 months later. Results: There were no evident complications happened. 2 cases showed evident bone resorption. The average bone resorption rate was 20 percent when inserting implant. The final restorations were made for all the cases. There was no implant defeated after 6-28 months' observation. Conclusion: The onlay bone grafting technique is simple and reliable for the restoration of severely atrophic alveolar crest.