Er:YAG激光预处理对牙本质-全瓷粘结剪切强度影响的体外研究

Abstract

Abstract: Objective To evaluate the effects of Er:YAG laser(EL) with different adhesive systems on the shear bond strength (SBS) of E-max CAD restoration in order to provide reference for clinical application of Er:YAG laser. Methods 80 newly extracted third molars prepared for SBS test and electron microscope analysis were randomly assigned to five groups. The buccal surface of each group was marked with ABCDE, and the lingual surface of each group was marked with abcde. Treatment method of each surface was as follows:A/a:EL+Optibond Versa/Adper Easy One; B/b:EL+35%phosphate etch+Optibond Solo Plus/Adper Single Bond 2; C/c:EL15.73 J/cm2/31.46 J/cm2; D/d:Optibond Versa/Adper Easy One; E/e:35%phosphate etch+Optibond Solo Plus/ Adper Single Bond 2. Bond strength test:3.5 mm×2.0 mm E-max CAD on lays were placed onto resin cement and bonded with the specimens. Electron microscope analysis:The dentin-adhesive interfaces were evaluated for the ultra structure of hybrid layer. Data of SBS(MPa) were statistically analyzed by ANOVA and χ2 test. Results Dentin irradiated by Er:YAG laser combined with total-acid etching system demonstrated significantly higher SBS (P＜0.05) compared to other group (23.01±4.41/25.37±3.96)MPa. Conclusion Er:YAG laser irradiated tooth surface combined with total-acid etching adhesive of different manufacturers can effectively improve the shear bond strength of dentin and ceramic.

Key words: Er:YAG Laser , dentin, bonding

CLC Number:

R783.1

References

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In vitro study of the effects of Er:YAG laser irradiation on the shear bond strength of dentin-ceramic interface

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