Peri-implant bone level around implants with platform-switched abutments:: Preliminary data from a prospective study
Peri-implant bone level around implants with platform-switched abutments:: Preliminary data from a prospective study
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DOI：
10.1016/j.joms.2007.03.024
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发表时间：
2007-07-01
影响因子：
1.9
通讯作者：
Wachtel, Hannes C.
中科院分区：
文献类型：
--
作者：
Huerzeler, Markus;Fickl, Stefan;Wachtel, Hannes C.
目的：多项长期临床研究表明，义齿修复后第一年种植体周缘骨丢失平均为1.5~2 mm。目前，人们已经提出了避免种植体周围骨质重塑的概念。使用与种植体直径相关的宽度较小的假体基牙(平台切换)似乎最有可能限制顶端吸收。这项临床试验的目的是表明平台转换方案可以影响种植体周围的顶骨高度，并在最终修复重建后1年内保持骨水平稳定。材料和方法：15例患者接受固定种植体固位修复，14例大直径种植体安装平台转换基牙作为试验组。用传统基牙修复8颗直径规则的种植体，作为对照组。在最终修复体安装时和一年的随访中，获得标准化的数字X线片以评估种植体周围骨水平。结果：平台切换种植体尖周骨高度的平均值为-0.09 mm+/-0.65 mm，非平台切换种植体尖周骨高度平均值为-1.73 mm+/-0.46 mm。终修复体1年后，试验组平均骨高为-0.22 rum+/-0.53 mm，对照组为-2.02 mm+/-0.49 mm。经统计学检验，基线和随访时差异均有统计学意义(P
Purpose: Several long-term clinical studies have shown a mean marginal bone loss around dental implants of 1.5 to 2 mm in the first year after prosthetic restoration. Currently, concepts to avoid bone remodeling around dental implants have been developed. The use of prosthetic abutments with reduced width in relation to the implant diameter (platform switching) seems to have the greatest potential to limit the crestal resorption. The purpose of this clinical trial was to show that crestal bone height around dental implants could be influenced using a platform switch protocol and that the bone level would remain stable within I year after final prosthetic reconstruction.Materials and Methods: Fifteen patients were treated with fixed implant retained prosthesis; 14 wide-diameter implants were supplied with platform-switched abutments and served as the test group. Eight implants with regular diameter were reconstructed with traditional abutments and served as the control group. Standardized digital radiographs were obtained for evaluation of the peri-implant bone levels at the time of installation of the final restoration and at 1-year follow-up. Marginal peri-implant bone levels were measured at the mesial and distal surfaces of each implant using digital image analysis.Results: The mean values of crestal bone height at baseline were -0.09 mm +/- 0.65 mm for the platform-switched implants and -1.73 mm +/- 0.46 mm for the nonplatform-switched implants. One year after final restoration, the mean value of crestal bone height was -0.22 rum +/- 0.53 mm for the test group and -2.02 mm +/- 0.49 mm for the control group. When tested with statistical means, the differences were significant for baseline and for follow-up (P