Effect of low-temperature degradation and sintering protocols on the color of monolithic zirconia crowns with different yttria contents

被引：3

作者：

Miura, Shoko ^{[1
,2
,3
]}

Shinya, Akikazu ^{[4
,5
]}

Koizumi, Hiroyasu ^{[6
]}

Vallittu, Pekka ^{[2
,3
,5
,7
]}

Lassila, Lippo ^{[2
,3
]}

Fujisawa, Masanori ^{[1
]}

机构：

[1] Meikai Univ, Dept Restorat & Biomat Sci, Div Fixed Prosthodont, Sch Dent, 1-1 Keyakidai, Sakado, Saitama 3500248, Japan

[2] Univ Turku, Inst Dent, Dept Biomat Sci, Lemminkaisenkatu 2, Turku 20520, Finland

[3] Univ Turku, Inst Dent, Turku Clin Biomat Ctr TCBC, Lemminkaisenkatu 2, Turku 20520, Finland

[4] Nippon Dent Univ Tokyo, Sch Life Dent Tokyo, Dept Dent Mat Sci, 1-9-20 Fujimi, Tokyo, Tokyo 1020071, Japan

[5] Univ Turku, Inst Dent, Dept Prosthet Dent & Biomat Sci, Lemminkaisenkatu 2, Turku 20520, Finland

[6] Nihon Univ, Sch Tokyo, Dept Dent Mat, 1-8-13 Kandasurugadai, Tokyo, Tokyo 1018310, Japan

[7] Welf Dist Cty Southwest Finland, Lemminkaisenkatu 23, Turku 20520, Finland

来源：

DENTAL MATERIALS JOURNAL | 2024年 / 43卷 / 02期

关键词：

Aging; Esthetic dentistry; Optical property; Speed sintering; Y-TZP; DENTAL CERAMICS; STABILITY; MICROSTRUCTURE; THRESHOLDS; STRENGTH; WEAR;

D O I：

10.4012/dmj.2023-194

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

This study investigated the effects of low-temperature degradation (LTD) on the L", a", and b" values of highly translucent zirconia crowns. Four types of zirconia disks with different yttria contents (IPS e.max ZirCAD LT, IPS e max ZirCAD MT, IPS e.max ZirCAD MT Multi, IPS e.max ZirCAD Prime, Ivoclar) and two shades (A2 and BL) were used. A crown was manufactured using four types of zirconia and LTD treated. Color measurements were performed, and the color difference (AE) before and after LTD was calculated. The microstructure was determined through X-ray fluorescence and X-ray diffractometry. Highly translucent zirconia crowns showed greater changes in the a and b values than in the L" value after LTD, regardless of the shade. The Multi2 crowns exhibited. a discernible color change due to the LTD treatment. The X-ray fluorescence results did not reveal any apparent change in the microstructure between sintering programs for all zirconia specimens.

引用

页码：164 / 171

页数：196

共 45 条

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