Working parameters of a magnetostrictive ultrasonic scaler influencing root substance removal in vitro

被引:81
作者
Flemmig, TF
Petersilka, GJ
Mehl, A
Hickel, R
Klaiber, B
机构
[1] Univ Wurzburg, Poliklin Zahnerhaltung & Paradontol, Dept Periodontol, Abt Parodontol, D-97070 Wurzburg, Germany
[2] Univ Munich, Clin Operat Dent & Periodontol, D-80539 Munich, Germany
[3] Univ Wurzburg, Clin Operat Dent & Periodontol, D-97070 Wurzburg, Germany
关键词
dental instruments; periodontal diseases; therapy; scaling; instrumentation; tooth root; ultrasonics;
D O I
10.1902/jop.1998.69.5.547
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
THIS STUDY ASSESSED DEFECT DEPTH and volume resulting from root instrumentation using a magnetostrictive ultrasonic scaler with a slim scaling tip (P 12) in vitro. Combinations of the following working parameters were analyzed: lateral forces of 0.5 N, 1 N, and 2 N; tip angulations of 0 degrees, 45 degrees, and 90 degrees; power settings of low, medium, and high; and instrumentation time of 10, 20, 40, and 80 seconds. Defects were quantified using a 3-dimensional optical laser scanner. Lateral force had the greatest influence on defect volume compared to tip angulation and power setting (beta-weights 0.53 +/- 0.04, 0.17 +/- 0.04, and 0.19 +/- 0.04, respectively). Lateral force and tip angulation had similar effects on defect depth, but both effects were greater compared to power setting (beta-weights 0.43 +/- 0.04, 0.49 +/- 0.04, and 0.19 +/- 0.04, respectively). The various combinations of the assessed working parameters showed synergistic effects resulting in a wide range of defect depths (14.1 +/- 1.7 mu m to 410.5 +/- 51.1 mu m) and volumes (0.0084 +/- 0.0057 mm(3) to 1.3 +/- 0.079 mm(3)). Severe root damage (defect depth > 50 mu m) at 40 seconds instrumentation time occurred under most combinations of lateral force, angulation, and power settings. The only exceptions were combinations of: 1) 0 degrees angulation, 0.5 N and 1 N lateral force at any power setting and 2) 45 degrees angulation, 0.5 N lateral force at low and medium power setting. The efficacy of the assessed magnetostrictive ultrasonic scaler may be adapted to the various clinical needs by adjusting the lateral force, tip angulation, and power setting.
引用
收藏
页码:547 / 553
页数:7
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