A new modified laser pretreatment for porcelain zirconia bonding
A new modified laser pretreatment for porcelain zirconia bonding
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DOI：
10.1016/j.dental.2013.03.002
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发表时间：
2013-05-01
期刊：
影响因子：
5
通讯作者：
Kan, Chi-Wai
中科院分区：
文献类型：
--
作者：
Liu, Dan;Matinlinna, Jukka P.;Kan, Chi-Wai
目标。本研究的目的是比较三种不同表面处理在增强瓷氧化锆粘合方面的效果。方法。总共制备了 160 个致密烧结氧化锆样品，并随机分为四个研究组：对照（无处理，C 组）、喷砂（S 组）、喷砂后再生烧制（SH 组）和 CO2 激光系统上的激光照射（脉冲模式）（L 组）。经过表面处理后，在氧化锆表面贴上瓷粉。每组中一半的样品在未老化的情况下进行评估（初始剪切粘合强度-初始SBS），另一半在水中存放一个月后进行测试（老化SBS）。 X 射线衍射 (XRD) 用于观察氧化锆表面的任何晶体转变。使用方差分析 (ANOVA) 和火鸡检验 (= 0.05) 对结果进行统计分析。结果。 S组、SH组和L组的初始平均SBS值分别为31.3±5.7MPa、29.2±7.0MPa和32.1±7.5MPa。这三组之间的差异并不显着。对照组的值显着低于S组和L组，为24.8+/-6.7MPa。此外，各组的初始值和老化值之间没有显着差异。 XRD分析表明喷砂引起四方相到单斜相的转变。再生点火逆转了这种转变。然而，在激光处理的样品中无法检测到晶体转变。意义。喷砂和激光照射都增加了氧化锆陶瓷的结合强度。所提出的新改良激光预处理可能是喷砂的替代方法，以改善氧化锆/瓷的集成。 (C) 2013 年牙科材料学会。由爱思唯尔有限公司出版。保留所有权利。
Objectives. The aim of this study was to compare the effects of three different surface treatments in enhancing porcelain zirconia bonding.Methods. Totally, 160 densely sintered zirconia specimens were prepared and randomly divided into four study groups: control (no treatment, Group C), sandblasting (Group S), sandblasting followed by regeneration firing (Group SH), and laser irradiation (pulse mode) on a CO2 laser system (Group L). After surface treatment, porcelain powders were veneered on zirconia surface. Half of the specimens in each group were evaluated without aging (initial shear bond strength - initial SBS), and the other half was tested after being stored in water for one month (aging SBS). X-ray diffractometry (XRD) was used to observe any crystallographic transformation at zirconia surface. Results were statistically analyzed using analysis of variance (ANOVA) and Turkey test (= 0.05).Results. The initial average SBS values of Group S, Group SH, and Group L were 31.3 +/- 5.7 MPa, 29.2 +/- 7.0 MPa and 32.1 +/- 7.5 MPa, respectively. The differences among these three groups were not significant. The control group had significantly lower value, 24.8 +/- 6.7 MPa, than those of Group S and Group L. Furthermore, there was no significant difference between initial and aging values in each group. XRD analysis showed that sandblasting caused tetragonal to monoclinic phase transformation. Regeneration firing reversed such a transformation. However, crystallographic transformation could not be detected in laser treated specimens.Significance. Both sandblasting and laser irradiation increased porcelain zirconia bond strength. The presented new modified laser pre-treatment might be an alternative way to sandblasting for improving zirconia/porcelain integration. (C) 2013 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.