“All-on-4”种植即刻修复技术的临床应用研究

Clinical study of ＂All-on-4＂ implant immediate function in edentulous patients

目的评价应用“All-on-4”种植即刻修复技术对牙列缺失患者进行种植即刻修复的临床效果，探讨其技术要点及临床意义。方法2008年4月至2009年10月共29例患者（男15例，女14例）接受了“All-on-4”种植即刻修复。29例（上颌牙列缺失8例，下颌牙列缺失15例，全口牙列缺失6例）共植入140枚种植体，在种植体植入当天完成即刻修复，一共完成35件“All-on-4”即刻义齿。即刻修复后观察种植体边缘骨吸收情况、修复体功能状况、患者满意度，追踪种植体的存留率。患者平均追踪10个月（6～24个月）。结果140枚种植体中，8枚于植入后6-8周脱落；其余132枚种植体至最后一次复查临床稳定，种植体存留率94．3％；即刻修复义齿的存留率94％（33／35）；边缘骨吸收程度为（0．8±0．4）mm。结论“All-on-4”种植即刻修复技术应用于牙列缺失患者近期效果好，患者满意度高。远期效果需要进一步观察。

Objective To evaluate the preliminary clinical results of application of All-on-4 immediate function in edentulous patients. Methods Twenty nine edentulous patients with 140 immediately loaded implants supporting fixed complete-arch all-acrylic prostheses from April 2008 to October 2009 in Peking University School of Stomatology were included. The implant-supported fixed complete-arch all- acrylic prostheses were delivery on the operation day. At time of abutments connection, a panoramic radiograph was taken. And radiographic assessment of the marginal bone level was performed in every 2 months. Clinical observe items included marginal bone level, integrity of the restoration, survival of the implants and degree of satisfaction of the patients. Results A total of 140 implants were immediate loading. Eight implants were lost during 6-8 weeks after immediate loading, giving survival rate of 94. 3%. The marginal bone level was （0. 8 ± 0.4 ） mm . The All patients were satisfied with the clinical results. Conclusions The data and the experience described in this study indicate that All-on-four immediate function technique can be a predictable technique for edentulous patients. Further study is needed to determine the long-term result of the technology.