Under the conditions of these in vitro leakage studies , it is concluded that smear layer removal improves the fluid-tight seal of the root canal system whereas other factors such as the obturation technique or the sealer , did not produce significant effects
The purpose of this systematic review was to determine whether smear layer removal reduces leakage of obturated human teeth in vitro .
A study of cavity preparation by Er:YAG laser. Effects on the marginal leakage of composite resin restoration.
The purpose of this study was to evaluate marginal leakage of composite resin restoration from cavities prepared by Er : YAG laser .  The observation of the dentin surface after the application of laser irradiation was performed by LSM , the cutting surface showed a rough surface similar to scales , and exposed dentinal tubules were observed without striations or a smeared layer formation that were observed when using a rotary cutting device . Leakage tests revealed no significant differences in the marginal seal for both enamel and dentin between cavities prepared by Er : YAG laser irradiation and when using an air-turbine . In this study , the usefulness of cavity preparation by Er : YAG laser irradiation in composite resin restoration was suggested
Under the conditions of these in vitro leakage studies , it is concluded that smear layer removal improves the fluid-tight seal of the root canal system whereas other factors such as the obturation technique or the sealer , did not produce significant effects
The purpose of this systematic review was to determine whether smear layer removal reduces leakage of obturated human teeth in vitro .