Rühling A, Schlemme H, König J, Kocher T, Schwahn C, Plagmann H C
Department of Periodontology, School of Dentistry, University of Kiel, Germany.
J Clin Periodontol. 2002 Jul;29(7):622-9. doi: 10.1034/j.1600-051x.2002.290706.x.
BACKGROUND/AIMS: In a dummy-head trial, we assessed how effectively untrained operators were able to learn scaling with curettes and power-driven instruments.
Two untrained operator groups (n = 11 each) received six 2-h lessons during a 10-week period following a training program. Subgingival scaling was performed with curettes (GRA) and a power-driven system (PP). At 6 test days each subject had to instrument 10 test teeth. The percentage of debrided area was assessed with an image analysis program. Learning success was measured as a percentage of debrided root area and scaling time. Furthermore, the effectivity was related to difficulty in anatomical situations and access to root surfaces. Statistical analysis was carried out with SPSS.
At baseline, effectivity was 63.1% (GRA) vs. 52.3% (PP). Between weeks 9 and 11, operators reached a plateau for group GRA at 84.7% and group PP at 81.3%. Scaling time did not differ between the two groups. Debridement of teeth with complex root shapes that were hard to access was less effective with the power-driven system.
Independent of the instrument used, untrained operators were only able to debride root surfaces at low levels of efficacy. With systematical training, effective scaling with the power- driven system was as easy to learn as with hand instruments. On root surfaces with complicated shape and anatomy or difficult accessibility, the power-driven system works significantly less effectively.
背景/目的：在一项模拟人头试验中，我们评估了未经培训的操作人员使用刮治器和动力驱动器械进行洁治的效果。
两个未经培训的操作人员组（每组n = 11）在为期10周的培训计划后的时间段内接受了6次每次2小时的课程。使用刮治器（GRA）和动力驱动系统（PP）进行龈下刮治。在6个测试日，每个受试者必须对10颗测试牙进行器械操作。使用图像分析程序评估清创面积的百分比。学习成功以清创根面积和刮治时间的百分比来衡量。此外，有效性与解剖部位的难度和牙根表面的可达性有关。使用SPSS进行统计分析。
基线时，GRA组的有效性为63.1%，PP组为52.3%。在第9周和第11周之间，GRA组的操作人员达到了84.7%的平稳期，PP组为81.3%。两组之间的刮治时间没有差异。动力驱动系统对难以触及的复杂牙根形状牙齿的清创效果较差。
无论使用何种器械，未经培训的操作人员只能以较低的效率清创牙根表面。通过系统培训，动力驱动系统的有效刮治与手动器械一样容易学习。在形状和解剖结构复杂或难以触及的牙根表面，动力驱动系统的效果明显较差。
