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In modern operative dentistry in the field of pediatric dentistry Er,Cr:YSGG laser is suitable for cavity preparation in deciduous molars because it have many advantages. Microleakage is one of the major problems that influence the longevity for the resin-based dental restorations. The purpose of the current study is comparing the effect of Er,Cr:YSGG laser and conventional conditioning on the microleakage in cavity class V restored by composite resin and conventional flowable composite in deciduous molars. Materials and methods: A standard class V cavity were prepared at the buccal or lingual surface of forty-eight freshly extracted caries-free human deciduous molars which were divided into 2 groups according to the mode of conditioning: group 1: by using Er,Cr:YSGG laser; group 2: by using conventional conditioning. The samples were subjected to thermocycling and dying step. Results: Laser conditioning showed statistically significantly lower mean microleakage scores than conventional technique (P-value <0.001) and (P-value = 0.001), respectively. There was no statistically significant difference between mean microleakage scores of the two composite types (P-value = 0.054) and (P-value = 0.096), respectively. Conclusion: Conditioning by Er,Cr:YSGG Laser is better than conventional method as regards microleakage and no significant difference between composite resin and conventional flowable composite clinically.

egyptian dental journal /egyptian dental journal

Microleakage of Cavity Class V Restored by Composite Resin and Conventional Flowable Composite Restorations in Primary Molars Conditioned by Er,Cr:YSGG Laser Versus Conventional method (An in Vitro Study)