الفهرس 
Dental composite resin
Laser cavity preparation:Only 14 pages are availabe for public view
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Abstract
Objective: The aim of this study was to evaluate and compare the marginal integrity of composite resin restorations made by two different preparation techniques:conventional drill and hydro-abrasion.Materials and methods: forty extracted human premolars with simple occlusal caries were used. The teeth were fixed with sticky wax to the base of plastic cylinder.The cylinder was filled with self-curing acrylic resin so that only root was embedded within the self- curing acrylic resin.