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 .
Preliminary report of an experimental design for in vivo testing of bonded restorations applied to a new enamel-dentinal bonding agent.
Because of inconsistency often found between in vitro testing and in vivo performance , a new restorative bonding system was evaluated by the placement of  restorations in vivo in teeth to be extracted . The microleakage was determined following extraction after 3 months of clinical service . In each of the sample teeth , two restorations were placed on the labial surface , one in the middle of the enamel portion and the other extending over the cementoenamel portion . The results of this pilot study indicated that bonding to conditioned enamel with the new adhesive material is effective , and bonding to conditioned dentin appears to be clinical ly adequate
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 .