2种激光对硬化牙本质粘接强度影响的实验研究

Abstract

Abstract: Abstract: Objective To compare the effect of different kinds of lasers on microtensile bond strength of noncarious sclerotic dentin.Methods Thirty human molars with occlusal wear were randomly divided into group E,group N and the control group.Group E were treated with Er,Cr:YSGG laser,while group N were treated with Nd:YAG laser.Then all three groups were treated with Adper Prompt LPop,filled with Z350 resin,and preserved in normal saline （37 ℃）for 24 h.Then fatigue test pieces were made and the microtensile bond strength was evaluated.Results were subject to statistical analysis using oneway analysis of variance （ANOVA）.Results The bonding strength was （24.71±3.13）MPa in group E,（21.72±2.36）MPa in group N,and （18.61±2.01）MPa in the control group.The differences among all groups were statistically significant （P＜0.05）.The breakage mostly happened in adhesive dentine surface.Conclusions The bonding strength of molars to Z350 resin can be increased by Er,Cr:YSGG laser and Nd:YAG laser,and the former is more effective.

Key words: laser, sclerotic dentin, micro-tensile bond strength

CLC Number:

R781.05

References

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Effect of different kinds of lasers on microtensile bond strength of noncarious sclerotic dentin

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