Air-particle abrasion on zirconia ceramic using different protocols: Effects on biaxial flexural strength after cyclic loading, phase transformation and surface topography

被引:107
作者
Souza, Rodrigo O. A. [1 ]
Valandro, Luiz F. [2 ]
Melo, Renata M. [3 ]
Machado, Joao P. B. [4 ]
Bottino, Marco A. [3 ]
Oezcan, Mutlu [5 ]
机构
[1] Univ Fed Paraiba, Dept Restorat Dent, Div Prosthodont, BR-59092220 Natal, RN, Brazil
[2] Univ Fed Santa Maria, Dept Restorat Dent, Div Prosthodont, BR-97015372 Santa Maria, RS, Brazil
[3] Sao Paulo State Univ, Sao Jose dos Campos Dent Sch, Dept Dent Mat & Prosthodont, BR-12245000 Sao Jose Dos Campos, SP, Brazil
[4] Natl Inst Spatial Res, BR-12227010 Sao Jose Dos Campos, SP, Brazil
[5] Univ Zurich, Ctr Dent & Oral Med, Clin Fixed & Removable Prosthodont & Dent Mat Sci, Dent Mat Unit, CH-8032 Zurich, Switzerland
基金
巴西圣保罗研究基金会;
关键词
Air-abrasion; Biaxial flexural strength; Silica coating; Y-TZP; Zirconia; BOND STRENGTH; CONDITIONING METHODS; FRACTURE-RESISTANCE; STABILIZED ZIRCONIA; RELIABILITY; FATIGUE; CEMENT; PERFORMANCE; TOUGHNESS; ALUMINA;
D O I
10.1016/j.jmbbm.2013.04.018
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
This study evaluated the effect of different air particle abrasion protocols on the biaxial flexural strength and structural stability of zirconia ceramics. Zirconia ceramic specimens (ISO 6872) (Lava, 3M ESPE) were obtained (N=336). The specimens (N=118, n=20 per group) were randomly assigned to one of the air-abrasion protocols: Gr1: Control (as-sintered); Gr2: 50 mu m Al2O3 (2.5 bar); Gr3: 50 mu m Al2O3 (3.5 bar); GT4: 110 mu m Al2O3(2.5 bar); Gr5: 110 mu m Al2O3 (3.5 bar); GT6: 30 mu m SiO2 (2.5 bar) (CoJet); Gr7: 30 mu m SiO2(3.5 bar); Gr8: 110 mu m SiO2 (2.5 bar) (Rocatec Plus); and Gr9: 110 mu m SiO2 (3.5 bar) (duration: 20 s, distance: 10 mm). While half of the specimens were tested immediately, the other half was subjected to cyclic loading in water (100,000 cycles; 50 N, 4 Hz, 37 degrees C) prior to biaxial flexural strength test (ISO 6872). Phase transformation (t -> m), relative amount of transformed monoclinic zirconia (F-M), transformed zone depth (TZD) and surface roughness were measured. Particle type (p=0.2746), pressure (p=0.5084) and cyclic loading (p=0.1610) did not influence the flexural strength. Except for the air-abraded group with 110 pm Al2O3 at 3.5 bar, all air-abrasion protocols increased the biaxial flexural strength (MPa) (Control.-aged: 1030 +/- 153, Controlaged: 1138 +/- 138; Experimental(aged): 1307 +/- 184-1554 +/- 124; Experiment(alagea): 1308 +/- 118-1451 +/- 135) in both non-aged and aged conditions, respectively. Surface roughness (Ra) was the highest with 110 pm Al0O3(0.84 mu m. F-M values ranged from 0% to 27.21%, higher value for the Rocatec Plus (110 mu m SiO2) and 110 pm Al2O3 groups at 3.5 bar pressure. TZD ranged between 0 and 1.43 mu m, with the highest values for Rocatec Plus and 110 mu m Al2O3 groups at 3.5 bar pressure. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:155 / 163
页数:9
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