The effect of adding silica to zirconia to counteract zirconia's tendency to degrade at low temperatures

被引：23

作者：

Nakamura, Takashi ^{[1
]}

Usami, Hirofumi ^{[1
]}

Ohnishi, Hiroshi ^{[2
]}

Takeuchi, Miyuki ^{[2
]}

Nishida, Hisataka ^{[3
]}

Sekino, Tohru ^{[4
]}

Yatani, Hirofumi ^{[1
]}

机构：

[1] Osaka Univ, Dept Fixed Prosthodont, Grad Sch Dent, Suita, Osaka 5650871, Japan

[2] Nikkato Corp, Osaka 5900001, Japan

[3] Osaka Dent Univ, Dept Operat Dent, Osaka 5731121, Japan

[4] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

DENTAL MATERIALS JOURNAL | 2011年 / 30卷 / 03期

关键词：

Zirconia; Silica; Degradation; Accelerated aging test; FIXED PARTIAL DENTURES; Y-TZP; DENTAL APPLICATIONS; FLEXURAL STRENGTH; IN-VITRO; CERAMICS; STABILITY; CROWNS; RESISTANCE;

D O I：

10.4012/dmj.2010-142

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

Yttria-based zirconia material (Y-TZP) widely used in dentistry, may degrade in a humid, low-temperature environment such as that in the oral cavity. The aim of this study was to compare the degradation of a new silica doped Y-TZP material with that of conventional Y-TZP by using accelerated aging tests at 200 C. The results of the accelerated tests revealed that after 50 hours of aging, the conventional Y-TZP samples had damaged surfaces that were weakened by 50 to 60%, while the silica-doped Y-TZP samples were only weakened by less than 20%. The monoclinic content of the conventional Y-TZP samples increased substantially to 62.7%, however, that of silica-doped Y-TZP samples was 18.9% after 5 hours of aging. It was concluded that a new type of silica-doped Y-TZP, created by adding a small amount of silica to Y-TZP, will be more resistant to low temperature degradation than conventional Y-TZP.

引用

页码：330 / 335

页数：6

共 27 条

[1]

[Anonymous], 2008, 6872 INT STAND ORG

[2]

[Anonymous], 2008, 13356 INT STAND ORG

[3] Transformation-toughened zirconia for dental inlays, crowns and bridges: chemical stability and effect of low-temperature aging on flexural strength and surface structure [J].

Ardlin, BI .

DENTAL MATERIALS, 2002, 18 (08) :590-595

[4] Mechanical properties of zirconia/alumina nano-composite after soaking in various water-based conditions [J].

Ban, S ;

Nawa, M ;

Suehiro, Y ;

Nakanishi, H .

BIOCERAMICS 18, PTS 1 AND 2, 2006, 309-311 :1219-1222

[5] What future for zirconia as a biomaterial? [J].

Chevalier, J .

BIOMATERIALS, 2006, 27 (04) :535-543

[6] State of the art of zirconia for dental applications [J].

Denry, Isabelle ;

Kelly, J. Robert .

DENTAL MATERIALS, 2008, 24 (03) :299-307

[7] A critical comparison of methods for the determination of the aging sensitivity in biomedical grade yttria-stabilized zirconia [J].

Deville, S ;

Gremillard, L ;

Chevalier, J ;

Fantozzi, G .

JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS, 2005, 72B (02) :239-245

[8] PHASE ANALYSIS IN ZIRCONIA SYSTEMS [J].

GARVIE, RC .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1972, 55 (06) :303-&

[9] Improving the durability of a biomedical-grade zirconia ceramic by the addition of silica [J].

Gremillard, L ;

Chevalier, J ;

Epicier, T ;

Fantozzi, G .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2002, 85 (02) :401-407

[10] Microstructural study of silica-doped zirconia ceramics [J].

Gremillard, L ;

Epicier, T ;

Chevalier, J ;

Fantozzi, G .

ACTA MATERIALIA, 2000, 48 (18-19) :4647-4652

← 1 2 3 →