Nagy R J, Otomo-Corgel J, Stambaugh R
J Periodontol. 1992 Dec;63(12):954-9. doi: 10.1902/jop.1992.63.12.954.
This study evaluates the effectiveness of subgingival scaling and root planing with longer shank, thinner blade, rigid curets compared to the standard rigid Gracey curet. A total of 35 non-molar teeth from 7 patients provided 140 root surfaces for evaluation; 52 root surfaces were instrumented with the rigid longer shank curets; 52 with the standard rigid Gracey curets; and 36 provided untreated controls. A bilateral matched design was utilized where contralateral teeth in the same arch were instrumented. Instrumentation was standardized at 15 minutes per tooth. Both scaled and unscaled teeth were extracted immediately after the experimental procedures. They were viewed under a stereomicroscope with a 0.10 mm grid to assess the percent of surface covered by calculus and unaltered cementum. The curet efficiency was also evaluated. The results indicated a significant treatment effect compared to the controls in relation to the percentage of residual calculus and curet efficiency. However, there was no significant difference between the rigid longer shank and standard rigid Gracey curets. There was a difference noted when tooth surfaces were evaluated. Mesial tooth surfaces had the least remaining calculus and demonstrated the best curet efficiency.
本研究评估了与标准刚性格雷斯刮治器相比，使用柄更长、刃更薄的刚性刮治器进行龈下刮治和根面平整的效果。7名患者的35颗非磨牙提供了140个根面用于评估；52个根面用刚性长柄刮治器进行器械操作；52个用标准刚性格雷斯刮治器；36个作为未处理的对照。采用双侧配对设计，对同一牙弓的对侧牙进行器械操作。每颗牙的器械操作时间标准化为15分钟。实验程序结束后，立即拔除已刮治和未刮治的牙齿。在带有0.10毫米网格的体视显微镜下观察，以评估牙石和未改变的牙骨质覆盖的表面百分比。还评估了刮治器的效率。结果表明，与对照组相比，在残留牙石百分比和刮治器效率方面有显著的治疗效果。然而，刚性长柄刮治器和标准刚性格雷斯刮治器之间没有显著差异。在评估牙面时发现有差异。近中牙面残留的牙石最少，刮治器效率最佳。
