平台转换种植体在上颌前牙区的临床应用

目的 评价平台转换种植体在上颌前牙区的应用效果,探讨平台转换技术对种植体周围组织的影响.方法 上颌前牙区单牙种植患者55例共60枚,分为2组,平台转换组25例,共28枚Ankylos系统种植体;平齐对接组30例,共32枚Nobel Replace系统种植体.分别于完成修复后1年和2年,观察种植体周围骨组织情况,计算红色美学得分(pink esthetic score,PES),比较2组种植体边缘骨组织和周围软组织的变化.结果种植体修复1年后,平台转换组种植体边缘骨变化量为(-0.41±0.36)mm,PES为10.43±1.37,平齐对接组种植体边缘骨平均变化量为(-1.77±0.54)mm,PES平均值为9.21±0.97;2年后,平台转换组骨变化量为(-0.55±0.33)mm,PES为10.32±1.21,平齐对接组边缘骨平均变化量为(-1.82±0.61)mm,PES为9.16±0.95.修复后1、2年,2组的种植体周围边缘骨吸收量和PES差异均具有统计学意义.结论 平台转换种植体在上颌美学区单牙种植修复能更有效保留周围骨组织及具有更佳的美学效果.

Clinical application of platform switching implants in maxillary anterior region

Objective To evaluate the application effect of the platform switching implants in maxillary anterior region, to explore the effect of platform switching technology on the surrounding tissues. Methods 55 patients with 60 single maxillary anterior implants were divided into two groups:platform-switching implants group (Ankylos), 25 patients with 28 implants;butt-joint implants group (Nobel Replace), 30 patients with 32 implants. The patients received follow-up care more than 1 and 2 year after the final setting of the prosthesis, at which time periapical radiographs were taken. The marginal bone level around the implant and Pink Esthetic Score (PES) were measured for comparison. Results The average marginal bone changes of platform-switching implants after 1 year and 2 year were (-0.41 ± 0.36) mm and (-0.55 ± 0.33) mm respectively;and the ones of butt-joint implants were (-1.77 ± 0.54) mm and (-1.82 ± 0.61) mm. The average PES of platform-switched implants after 1 year and 2 year were 10.43 ± 1.37 and 10.32 ± 1.21 respectively;the ones of butt-joint implants were 9.21 ± 0.97 and 9.16 ± 0.95. There were significantly differences of marginal bone changes and PES between both groups (P<0.05). Conclusion Platform switching implant in the maxillary aesthetics area is more effective in preserving the surrounding bone tissue and aesthetic effect.