不同连接方式种植体对周围组织影响的临床比较

目的比较平台转换种植体和传统基台连接种植体对上颌美学区单牙种植周围组织的影响。方法随机选择95例（110枚）上颌美学区单牙种植修复患者，其中Ankylos系统（平台转换）47例（54枚种植体），Nobel Replace系统（传统基台连接）48例（56枚种植体）。在患者最终修复后36～62个月进行随访，拍摄X线片及临床检查来记录种植体周围骨组织和牙龈组织的状况，比较两组种植体边缘骨吸收量和周围软组织红色美学指数。利用统计学方法分析所得数据。结果不同连接方式种植修复后种植体周围边缘骨吸收量与红色美学指数具有显著差异，平台转换种植体的骨吸收量明显少于传统基台连接组，红色美学指数也高于传统基台连接。结论平台转换种植体在上颌美学区单牙种植修复相较于传统基台连接种植体能更有效的保留周围骨组织且美学效果较佳。

Clinical comparison of different abutment connection on peri-implant tissues

Objective The purpose of this study is to compare peri-implant tissues outcomes of single-tooth implants using platform switching and platform butt-joint placed into maxillary esthetics area. Methods One hundred and ten single-tooth implants were placed into the maxillary aesthetic area of 95 patients selected randomly; 54 implants of 47 patients were using Ankylos system （platform switching）; and 56 implants of 48 patients were using Nobel Replace system （butt-joint）. All the patients had a follow-up of 36 to 62 months after the implant restoration. Radiographic and clinical examinations were made at the time of the final crowns delivery and the subsequent following-up month. The peri-implant bone resorption and the index of Red Aesthetic Standard were evaluated, respectively. Results There were significant differences in bone resorption and red aesthetic index between the two groups after implant restoration. Bone resorption around implants using platform switching was significantly less than that using platform butt-joint, and aesthetic index of the former group was higher than the later one. Conclusion Dental implants using platform switching placed into the maxillary esthetic area were able to preserve better marginal bone and acquired better aesthetic effect.