平台转换在种植义齿修复中的临床评价

目的：评价平台转换技术在牙列缺损种植修复中的临床效果。方法：38例牙列缺损种植患者随机分为实验组与对照组,共植入51枚直径为4.5 mm XIVE种植体。实验组：19例27枚种植体选用愈合基台直径为3.8 mm平台转换连接式,重建种植区的结合上皮,3.8 mm修复基台,高含金量贵金属烤瓷冠修复。对照组：19例24枚种植体选用愈合基台、修复基台直径与种植体直径相同的平齐对接连接式,高含金量贵金属烤瓷冠修复。分别于种植体负载前及负载后3、6、12月时行X线检查,测量种植体颈部边缘骨吸收量及软组织健康状况并进行评价。结果：平台转换种植体颈部骨吸收量明显小于对连接种植体（P﹤0.01）,两者软组织健康状况差异不明显（P﹥0.05）。结论：与平齐式对接相比,功能负载1年内,临床平台转换设计可保留种植体颈部边缘骨高度。

The clinical evaluation of the platform-switching in the implant dentures prostheses

Objective:To evaluate the effects of the platform-switching in the implant dentures prostheses of dentition defect.Method:38 dentition defect implanting patients were radomly assigned to 2 groups(n=19)and 51 Xive implants of diameter in 4.5 mm were placed.The experimental group:27 implants of a healing abutment 0.7 mm narrower than the implant platform were placed at the time of surgery.The controlled group:24 implants of a healing abutment of the same diameter as the implant were inserted.All implants were...