饵激光预备及光固化灯超强功率模式对树脂微渗漏的影响

Abstract

Abstract: Objective To study the effect of Er: YAG laser preparation and xtra power mode of curing light on the microleakage of the composite resin filling. Methods 40 extracted molars were randomly divided into 4 groups for cavity preparation, filling and curing: Group A—High speed handpiece and ANTHOS therapy unit attached LED light (550 mW/cm2, 20 s); Group B—high speed handpiece and VALO light curing unit (xtra power mode 3200 mW/cm2, 3 s ); Group C—Er: YAG laser and ANTHOS therapy unit attached LED light; Group D—Er: YAG laser and VALO light curing unit. All the samples were prepared for class V cavities thereupon resin filling and placed in the normal saline at 37 ℃ for 24 h. After thermocycling, all samples were stained by methylene blue solution, and then sectioned longitudinally in buccolingual direction. Microleakage of the composite resin was observed under stereomicroscope and statistically analyzed. Results Microleakage of gingival wall in all samples was higher than that of the occlusal wall; Microleakage of group A was lower than in group B and group C, with a statistically significant difference (P ＜ 0.05). Group D had the largest microleakage compared with other groups, and the difference was statistically significant (P＜0.05). Conclusion The Er: YAG laser preparation and xtra power mode of the light curing unit will increase the risk of the resin filling leakage.

Key words: Er:YAG laser xtra power mode resin microleakage

CLC Number:

R781.05

References

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The effect of Er: YAG laser preparation and xtra power mode of curing light on the microleakage of the composite resin

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