Visual and profilometric wear measurements.
Visual and profilometric wear measurements.
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DOI：
10.3109/00016359209012754
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发表时间：
1992
影响因子：
2
通讯作者：
K. Söderholm;M. Roberts;D. Antonson;K. Anusavice;A. Mauderli;D. Sarrett;J. W. Warren
中科院分区：
文献类型：
--
作者：
K. Söderholm;M. Roberts;D. Antonson;K. Anusavice;A. Mauderli;D. Sarrett;J. W. Warren
复合材料的磨损可以通过制备的腔壁与复合材料咬合边缘之间的边缘差异程度来估计。这种评估是通过比较和评定与标准铸型的边际差异来完成的。我们分析了这种技术在金属和石头标本上的可靠性。这些标本含有不同宽度和深度的凹槽。为了进行视觉比较，我们使用了已知槽深的机械加工标准的石模。我们用轮廓仪测量了金属标本的深度，并制作了这些原始标本的石模。使用标准的石模，五位牙医估计了剩余石模上未知的凹槽深度。这些估计是在标准化条件下进行的，并由每位牙医在五次不同的场合重复进行。结果表明，与用轮廓仪在原始金属模型上测量的深度相比，模版石样品的视觉深度评估低估了深度。一位研究者在不同场合给出了显著不同（p < 0.05）的凹槽深度估计。
Wear of composites can be estimated by the degree of marginal discrepancy between the prepared cavity wall and the occlusal margins of composites. Such evaluations are done on casts by comparing and rating the marginal discrepancy with those on standard casts. We analyzed the reliability of this technique on metal and stone specimens. These specimens contained grooves of different width and depth. For the visual comparison we used stone casts of machined standards of known groove depth. We measured the depths of the metal specimens with a profilometer and made stone casts of these original specimens. Using the stone casts of the standards, five dentists estimated the unknown groove depths on the remaining stone casts. These estimates were done under standardized conditions and repeated by each dentist on five different occasions. The results showed that visual depth evaluations of die stone specimens underestimated the depths when compared with the values measured with a profilometer on the original metal models. One investigator gave significantly different (p less than 0.05) groove depth estimates at different occasions.