Spinks G C, Carson R E, Hancock E B, Pelleu G B
J Periodontol. 1986 Oct;57(10):632-6. doi: 10.1902/jop.1986.57.10.632.
The sonic scaler, the curet, and the reciprocating motor-driven diamond tip were evaluated by comparing the number of rough root surfaces produced by each device in recontouring overhanging root-surface margins of amalgam and composite resin restorations. Ninety extracted human teeth were restored with amalgam or composite resin so that overhangs were created. Each instrument was used to remove 30 overhangs. The root surfaces apical to the overhangs were photographed under the scanning electron microscope at a magnification of x 140 and compared by five dentists, in a single-blind manner, with two control photomicrographs of surfaces classified as rough (treated with a coarse diamond bur) or not rough (treated with a greenstone). The number of rough responses for each instrument were compared statistically. For both restorative materials, the sonic scaler produced a significantly greater number of rough responses than did the other two instruments. Similar comparisons between the curets and the diamond-tip system showed no significant differences. No differences in the number of gaps produced between restoration and tooth were noted among the instruments. Clinical ease of overhang removal was greatest for the reciprocating motor-driven diamond tip and least for the curet. The approximate time to remove an overhang from a tooth was 3 minutes for the motor-driven diamond tip, 7 minutes for the sonic scaler and 15 minutes for the curet.
通过比较每种器械在修整汞合金和复合树脂修复体悬突根面边缘时产生的粗糙根面数量，对超声洁治器、刮治器和往复式电动金刚石车针进行了评估。用汞合金或复合树脂修复90颗拔除的人牙，以形成悬突。每种器械用于去除30个悬突。在扫描电子显微镜下以140倍的放大倍数拍摄悬突根尖的根面照片，并由五名牙医以单盲方式与两张分别分类为粗糙（用粗金刚石车针处理）或不粗糙（用绿石处理）的对照表面显微照片进行比较。对每种器械的粗糙反应数量进行统计学比较。对于两种修复材料，超声洁治器产生的粗糙反应数量均显著多于其他两种器械。刮治器和金刚石车针系统之间的类似比较未显示出显著差异。各器械在修复体与牙齿之间产生的间隙数量上没有差异。往复式电动金刚石车针去除悬突的临床操作最简便，刮治器最繁琐。用电动金刚石车针从一颗牙齿上去除悬突的大致时间为3分钟，超声洁治器为7分钟，刮治器为15分钟。
