Arora Ankit, Acharya Shashi Rashmi, Ballal Vasudev, Sharma Padmaja
Department of Conservative Dentistry and Endodontics, Manipal College of Dental Sciences, Manipal University, Karnataka, India.
J Conserv Dent. 2012 Jul;15(3):253-6. doi: 10.4103/0972-0707.97951.
Fighting the controversies, amalgam, as a posterior restorative material has survived till date. The fate of amalgam restoration is determined by geometry of the cavity preparation and cavosurface angle is one integral part of the cavity, which decides the marginal characteristics of the restoration and health of the tooth. Low edge strength of amalgam highlights the importance of cavosurface angle. However, at the same time conservation of the tooth also should be considered. This article presents a self-designed instrument to evaluate and obtain a cavosurface angle close to 110°. The design of the instrument also helps in evaluating parameters, such as depth of the cavity, undercut angle, and allows finishing of the buccal or lingual walls.
尽管存在争议，但汞合金作为一种后牙修复材料一直沿用至今。汞合金修复体的命运取决于窝洞预备的几何形状，而洞缘角是窝洞的一个组成部分，它决定了修复体的边缘特征和牙齿的健康状况。汞合金边缘强度较低凸显了洞缘角的重要性。然而，与此同时，牙齿的保存也应予以考虑。本文介绍了一种自行设计的器械，用于评估并获得接近110°的洞缘角。该器械的设计还有助于评估诸如窝洞深度、倒凹角等参数，并能对颊壁或舌壁进行修整。
