Development of a novel system for assessing tooth and restoration wear
Development of a novel system for assessing tooth and restoration wear
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DOI：
10.1016/0300-5712(95)00122-0
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发表时间：
1997-01-01
影响因子：
4.4
通讯作者：
Tulley, M
中科院分区：
文献类型：
--
作者：
Chadwick, RG;Mitchell, HL;Tulley, M
目的：本研究旨在开发一种用于评估牙齿和修复体磨损的测绘设备。方法：构建了一种计算机控制的测绘设备，能够通过电反馈机制扫描适当准备的导电牙齿复制品，并通过测量四名工程师的滑差规各 12 次的厚度来评估其准确性。还研究了使模具复制品导电的三种潜在方法的再现性。最后，对牙齿复制品进行表面轮廓分析，并使用商业表面测绘程序与原始牙齿进行经验比较。结果：滑移规平均厚度的总体平均精度为 4.4 (2.8) μm。在已成型的复制品上进行镍喷雾或金箔的表面沉积都无法获得可再现的厚度，在复制品生产之前用镍喷雾预涂硅树脂印模克服了这个问题。根据经验，该仪器产生了精确的牙齿复制品数字地形模型。结论：已经开发出一种既准确又可重复的表面测绘设备。在铸造复制品之前，通过用镍喷雾预涂硅胶印模，可以在牙齿复制品上产生令人满意的导电表面。该技术对于监测牙齿和修复体的磨损应该被证明是非常有价值的，但还需要进一步的工作来检查这种方法在临床上的表现。 (C) 1997 爱思唯尔科学有限公司。
Objectives: This investigation sought to develop a mapping apparatus for use in the assessment of both tooth and restoration wear.Methods: A computer controlled mapping device, capable of scanning a suitably prepared electroconductive tooth replica by means of an electrical Feedback mechanism, was constructed and its accuracy assessed by measuring the thicknesses of four engineers' slip gauges 12 times each. The reproducibility of three potential methods of rendering a die stone replica electroconductive was also investigated. Finally, tooth replicas were surface profiled and compared empirically with the originals using a commercial surface mapping program.Results: The overall mean accuracy of the mean thicknesses of the slip gauges was 4.4 (2.8) mu m. Surface deposition of either nickel spray or gold leaf, upon a ready formed replica, did not give a reproducible thickness, Precoating silicone impressions with nickel spray prior to replica production overcame this problem. On an empirical basis the instrument yielded accurate digital terrain models of tooth replicas.Conclusions: A surface mapping device has been developed which is both accurate and reproducible. A satisfactory electroconductive surface may be produced upon a tooth replica by precoating a silicone impression with nickel spray before casting the replica, The technique should prove invaluable for monitoring both tooth and restoration wear but further work is necessary to examine how such an approach will perform clinically. (C) 1997 Elsevier Science Ltd.