Batenburg R H, Meijer H J, Geraets W G, van der Stelt P F
Department of Oral and Maxillofacial Surgery and Maxillofacial Prosthetics, University Hospital Groningen, The Netherlands.
Dentomaxillofac Radiol. 1998 Jul;27(4):221-4. doi: 10.1038/sj/dmfr/4600354.
To evaluate the reliability of a new method for quantification of radiographic changes in the marginal bone around implants.
Three groups of seven patients treated with an overdenture supported by two endosseous implants (Brnemark, n = 7 patients; IMZ, n = 7 patients; ITI Bonefit, n = 7 patients) were selected. Six weeks after loading the implants, radiographs were obtained using the long cone technique and an aiming device, scanned and digitized. Two observers measured the height and area of the peri-implant bone defects twice. The difference between measurements was statistically analysed using paired t-tests.
There were small differences in interobserver error for the Brnemark implant system (P < 0.05), but no significant differences for the IMZ and ITI Bonefit. There were no significant difference in intraobserver error with any of the three implant systems (P > 0.05).
The newly developed technique by measuring the area of the defect overcomes some drawbacks of existing techniques for quantification of peri-implant bone loss in the mandible.
评估一种用于量化种植体周围边缘骨放射学变化的新方法的可靠性。
选取三组患者，每组7例，均采用由两颗骨内种植体支持的覆盖义齿进行治疗（Brnemark种植体，n = 7例患者；IMZ种植体，n = 7例患者；ITI Bonefit种植体，n = 7例患者）。种植体加载6周后，使用长锥技术和瞄准装置获取X线片，进行扫描并数字化。两名观察者对种植体周围骨缺损的高度和面积进行两次测量。测量结果的差异采用配对t检验进行统计学分析。
Brnemark种植体系统观察者间误差存在小差异（P < 0.05），但IMZ和ITI Bonefit种植体系统无显著差异。三种种植体系统中任何一种的观察者内误差均无显著差异（P > 0.05）。
通过测量缺损面积新开发的技术克服了现有技术在量化下颌种植体周围骨丢失方面的一些缺点。
