1998 Volume 16 Issue 1 Pages 24-33
The purpose of this study was to investigate the application of Er: YAG laser for cavity preparation and the composite resin restoration (Clearfil AP-X with Clearfil Liner Bond II).The adaptation of the composite resin filling to cavity walls was observed by dye penetration test and scanning electron microscopy (SEM).Using a SEM, a stomatal opening of dentinal tubule was observed, but a smear layer and dentinal plug were not identified on the dentin surface irradiated by Er: YAG laser. When Er: YAG laser ablation and high-speed rotation cutting by air turbine handpiece were compared, signigicant difference was not recognized in the marginal sealing of enamel and the composite resin, also dentin and resin were obiously bonded.These results indicate that Er: YAG laser used with water supply for cavity preparation may be safe to the adaptability to the composite resin restoration used in this study.
