不同瓷表面处理对托槽与瓷面粘结强度的影响

doi:10.13481/j.1671-587x.20150621

Abstract

Abstract:

Objective To observe the porcelain treated with Nd∶YAG laser irradiation and hydrofluoric acid(HF), and to explore the influence of integrated treatment of Nd∶YAG laser irradiation and HF etching in the bond strength of brackets to porcelain. Methods 48 metal ceramic prostheses were randomly divided into untreated control group, HF group, grooved treatment group, 0.75W laser group, 1.05W laser group, 1.45W laser group. All samples were bonded to the brackets. After temperature cycling test, the shear bond strength (SBS) and tensile bond strength (TBS)were measured. Results There were significant differences in SBS and TBS between various surface treatment groups and untreated control group (P<0.01). The SBS and TBS of brackets bonded in HF group was significantly higher than those in 1.05W laser and 1.45W laser groups (P<0.05).The SBS and TBS in 1.05W laser and 1.45W laser groups were higher than those in HF group(P<0.05). The SBS and TBS in 1.05W laser group were higher than those in other groups(P<0.05). SBS showed positive correlation with TBS(r=0.426, P=0.000). Conclusion The use of Nd∶YAG laser irradiation with the energy parameter of 1.05W and HF could increase the bonding with formation of composite resin, and the more SBS, the more TBS.

Key words: surface treatment, hydrofluoric acid, Nd∶YAG laser, shear bond strength, tensile bond strength

CLC Number:

R783

TAI Yinxia, ZHU Xianchun, TANG Guanqun, WANG Qiuyu, MAO Zhi. Influence of different surface treatments in bond strength of brackets to porcelain[J].Journal of Jilin University Medicine Edition, 2015, 41(06): 1207-1210.

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Influence of different surface treatments in bond strength of brackets to porcelain

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