Analysis of three-dimensional sinter shrinkage of copings made from alumina in an innovative direct shaping process

被引：9

作者：

Brick, EM

Rudolph, H

Arnold, J

Luthardt, RG

机构：

[1] Tech Univ Dresden, Univ Hosp Carl Gustav Carus, Fac Med, Dept Prosthodont, D-01307 Dresden, Germany

[2] ILMCAD GmbH Ilmenau, D-98693 Ilmenau, Germany

来源：

COMPUTERIZED MEDICAL IMAGING AND GRAPHICS | 2004年 / 28卷 / 03期

关键词：

3D visualization; computer simulation; computer imaging techniques; dental ceramic; sinter shrinkage;

D O I：

10.1016/j.compmedimag.2003.11.006

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The three-dimensional (3D) evaluation and comparison of free-form-surfaces is a complex problem [Dent. Mater. 8 (1992)49;J. Dent. Res. 76 (1997) 1799: Dent. Mater. 16(2000) 145; 1 J. Prosthet. Dent. 70(1993)457 Dent. Mater. 19 (2003) 19]. However, it is essential in order to analyze the sinter shrinkage of dental ceramic-restorations where isotropic and linear shrinkage is desired for accurate fit on the prepared teeth. In this article, we examine the 3D sinter shrinkage in general and for nine copings from alumina in particular. Using various scaled CAD-models in an iteration scheme. each model was compared to the filtered point Cloud of the coping, determining the surface-cloud difference. The magnitude of deviations from linear sinter shrinkage was investigated. Furthermore, a new fabrication process for ceramic-restorations is introduced. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：159 / 165

页数：7

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