制造工艺对牙科氧化锆相变的影响。

Influence of Manufacturing Regimes on the Phase Transformation of Dental Zirconia.

作者信息

Wertz Markus, Hoelzig Hieronymus, Kloess Gert, Hahnel Sebastian, Koenig Andreas

机构信息

Department of Prosthodontics and Material Sciences, Leipzig University, 04103 Leipzig, Germany.

Institute of Mineralogy, Crystallography and Materials Science, Leipzig University, 04103 Leipzig, Germany.

出版信息

Materials (Basel). 2021 Aug 31;14(17):4980. doi: 10.3390/ma14174980.

DOI:10.3390/ma14174980

PMID:34501071

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8434073/

Abstract

BACKGROUND

The influence of typical manufacturing regimes for producing fixed dental prostheses (FDPs) from yttria partly-stabilized zirconia polycrystals (3Y/4Y/5Y-TZP) on the phase composition is quantified.

METHODS

Fixed dental prostheses (FDPs) were designed using a CAD process and machined from different Y-TZP blanks from two manufacturers differing in yttria contents. Subsequent to sintering, the FDPs were glaze fired and air-blasted using alumina particles. Phase composition was determined with X-ray diffraction and quantified with Rietveld refinement.

RESULTS

The blanks from VITA Zahnfabrik (VITA YZ HT, VITA YZ ST, VITA YZ XT) and Dental Direct (DD Bio ZX, DD cube ONE, DD cube X) featured a rhombohedral portion with rather small crystallites and a small monoclinic portion for 3Y/4Y-TZPs, which increased after machining and disappeared after sintering. Glaze firing and air-blasting with alumina particles had no significant influence on the phase composition.

CONCLUSION

The phase history of dental zirconia is revealed, which may have implications on further processing and aging of the FDP (e.g. low temperature degradation) in mouth.

摘要

背景

量化了用氧化钇部分稳定的氧化锆多晶体（3Y/4Y/5Y-TZP）生产固定义齿（FDP）的典型制造工艺对相组成的影响。

方法

使用计算机辅助设计（CAD）流程设计固定义齿，并由来自两家氧化钇含量不同的制造商的不同Y-TZP坯料加工而成。烧结后，对FDP进行釉烧，并使用氧化铝颗粒进行喷砂处理。用X射线衍射测定相组成，并用Rietveld精修法进行量化。

结果

VITA齿科材料公司（VITA YZ HT、VITA YZ ST、VITA YZ XT）和牙科直接公司（DD Bio ZX、DD cube ONE、DD cube X）的坯料，对于3Y/4Y-TZP，具有菱面体部分，微晶相当小，还有一小部分单斜晶，加工后增加，烧结后消失。釉烧和用氧化铝颗粒喷砂处理对相组成没有显著影响。