摘要目的 评估应用平台转换技术种植修复上颌前牙区牙列缺损的临床效果,探讨该技术的临床应用特点.方法 2001年1至12月就诊于北京大学口腔医学院·口腔医院口腔种植中心上颌前牙区牙列缺损患者17例,共植入Frialit-2系统种植体26枚,Ⅱ期手术后应用平台转换技术修复.随访时间24～74个月,平均56.3个月,观察方法为临床检查和x线检查,评价种植体周骨高度丧失,进行红色美学评分.结果 全部患者至最后一次随访,均未见严重并发症,应用平台转换技术的种植体修复临床效果满意.种植修复完成1年和5年后边缘骨吸收分别为0.13(-0.12～0.55)mm和0.27(-0.04～0.77)mm;相邻种植体间牙槽骨高度丧失分别为0.14(0～0.30)mm和0.21(0.09～0.31)mm.按Jemt牙间乳头分类本组36个位点中达Ⅰ度3个位点,Ⅱ度23个位点,Ⅲ度10个位点.单牙种植修复Fürhauser红色美学评分为10～14,平均11.8分.结论 上领前牙区应用平台转换技术操作简单可靠,短期临床效果满意,可减少种植体边缘骨吸收、增进种植修复美学效果.

abstractsObjective To evaluate the clinical results of dental implant treatment with platform switching technique in esthetic zone and to investigate its technical characteristics. Methods Seventeen patients who were partially edentulous in esthetic zone were included and received a total of 26 Frialit-2 system implants in Center of Dental Implantation, Peking University School and Hospital of Stomatology from January to December 2001, and the platform switching technique was applied. The mean follow-up time was 56.3 months (24 to 74 months). Clinical examination and X-ray were conducted. Results Clinical results of all implant restoration that used platform-switched abutments were satisfied. No implant loss or other severe complications occurred. The medians of marginal bone loss 1 year and 5 years after final restoration was 0.13 (-0.12-0.55) mm and 0.27 (-0.04-0.77)mm respectivdy. The medians of interimplant erestal bone resorption was 0.14(0.00-0.30) mm and 0.21 (0.09.0.31) mm after 1 year and 5 years'functional loading respectively. According to Jemt classification of papilla, 23 sites reached Ⅱ degree, and 10 sites reached Ⅲ degree among 36 sites 5 years after prostheses. The mean value of pink esthetic score (PES) was 11.8 (10-14). Conclusions Platform switching is a simple and reliable technique for dental implant treatment, helping to control marginal bone loss and ensure an esthetic results in the esthetic zone.