Abstract

Since the late 90s the use of zirconia in dentistry increases, it is used for example for all-ceramic restorations, brackets and implants. This article will deal with all-ceramic restorations. For the production of these restorations many manufacturing steps are necessary: Pre-sintering of the ceramic powder, soft machining (pre-sintered condition), sintering and a pre-processing of the ‘finished’ geometry like hard machining (fully sintered) or grit blasting (GB) in combination with a final staining or veneering step. Most of the steps (excluding soft machining in a pre-sintered condition and sintering) are still carried out manually. All these techniques are associated with the production of flaws in different scales, in conjunction with thermal and residual stresses and phase transformations. This study investigates how those surface and subsurface properties, which arise due to the manufacturing process, influence the bonding between a framework ceramic and a veneering ceramic. This will be investigated by means of a scratch test.

摘要

自 90 年代后期，氧化锆在牙科中的使用增加，例如用于全瓷修复、托槽和种植体。本文将介绍全瓷修复体。为了生产这些修复体，许多制造步骤是必要的：陶瓷粉末的预烧结、软加工（预烧结条件）、烧结和“成品”几何形状的预处理，如硬加工（完全烧结）或砂砾喷砂 (GB) 结合最终染色或饰面步骤。大多数步骤（不包括预烧结条件下的软加工和烧结）仍然是手动进行的。所有这些技术都与不同尺度的缺陷的产生有关，以及热应力和残余应力以及相变。本研究调查了由于制造过程而产生的这些表面和亚表面特性如何影响框架陶瓷和贴面陶瓷之间的粘合。这将通过划痕测试进行调查。