Scanning electron microscope evaluation of wear of dental curettes during standardized root planing.
Scanning electron microscope evaluation of wear of dental curettes during standardized root planing.
复制标题
扫描电子显微镜评估标准化根面平整过程中牙科刮匙的磨损。
DOI：
10.1902/jop.1985.56.9.532
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发表时间：
1985
影响因子：
4.3
通讯作者：
T. Vaidyanathan
中科院分区：
文献类型：
--
作者：
H. Tal;J. M. Panno;T. Vaidyanathan
根面平整取决于器械切削刃的质量。本研究评估了标准化根面平整术后市场上一些牙科刮匙的锋利度和磨损情况。使用9个Gracey 1/2号DE刮匙的9个工作边缘作为对照，每个刮匙来自3个不同的制造商。通过扫描电子显微镜（SEM）检查这些未使用的工厂锐化边缘。在根面平整术后，同样检查了9个相同品牌刮匙的18个边缘。根面刨削进行了提取一根牙齿安装在自然位置的假人颌骨。测量3 × 5 mm的工作区域标记在先前因牙周炎暴露的牙根表面上。根面平整程序包括由每个器械的侧面1或侧面2相对于牙齿的单个工作区域进行15次垂直敲击，并且使用刮匙的相对侧面重复相同的程序3次。在500倍放大倍率下，在距离头端1 mm和2 mm的点处检查所有工作边缘。边缘变形从对照组到“15行程”组和从“15行程”组到“45行程”组显著增加。工厂锐化的刮匙（对照）锋利，55%的样本上存在功能性金属丝边缘。在15次行程后，存在非功能性金属丝边缘和窄边缘变形，斜面小于15 μ。经过45次行程后，8个切削刃（88.9%）显示出大于15 μ的斜面。三个品牌之间的差异在任何组中都不显著（即，对照组，15个冲程，45个冲程）。本研究旨在进一步探讨斜面尺寸与根面平整效果的关系。
Root planing relies upon the quality of instrument cutting edges. This study evaluated the sharpness and wear of some dental curettes available in the market following standardized root planing procedures. Nine working edges of nine Gracey No. 1/2 DE curettes, three each from three different manufacturers, were used as controls. These unused factory-sharpened edges were examined by scanning electron microscope (SEM). Eighteen edges of nine curettes of the same brands were likewise examined after root planing procedures. Root planing was carried out on extracted one-rooted teeth mounted in natural positions in manikin jaws. Working areas measuring 3 X 5 mm were marked on root surfaces previously exposed by periodontitis. Root planing procedures included 15 vertical strokes done by either Side 1 or Side 2 of each instrument in relation to a single working area of a tooth, and the same procedure repeated 3 times using the opposite side of the curette. All working edges were examined at points 1 and 2 mm from the tip under 500 times magnification. Edge deformation increased significantly from the control group to the "15-stroke" group and from the "15-stroke" group to the "45-stroke" group. Factory-sharpened curettes (control) were sharp, with functional wire edges present on 55% of the specimens. After 15 strokes, nonfunctional wire edges and narrow edge deformations with bevels measuring less than 15 mu were present. After 45 strokes eight cutting edges (88.9%) showed bevels wider than 15 mu. The difference between the three brands was not significant in any group (i.e., controls, 15 strokes, 45 strokes). Further study is indicated to evaluate the relationships between bevel dimensions and root planing effectiveness.