title: The effect on coronal leakage of liquid adhesive application over root fillings after smear layer removal with EDTA or Er:YAG laser.
abstract: OBJECTIVE
  To evaluate coronal microleakage in filled root canals that received different biomechanical preparations and application of liquid adhesives over the root filling and the pulp chamber walls.
  
  
  METHODS
  Root canals of 94 extracted canine teeth were filled after being biomechanically prepared with 1% sodium hypochlorite and divided into 3 groups. In 2 groups attempts were made to remove the smear layer with either 17% EDTA or Er:YAG laser irradiation (10 Hz, 250 mJ input, 112 mJ output). Liquid adhesive (Super Bonder and Single Bond adhesive) was applied and the teeth were immersed for 90 days in India ink.
  
  
  RESULTS
  Statistically significant differences were found for the different preparations, the use of liquid adhesives, and the different liquid adhesives. The use of Er:YAG laser, EDTA, and the liquid adhesive reduced coronal microleakage (P < .01).
  
  
  CONCLUSIONS
  Because of the risk of coronal microleakage, endodontically treated teeth should be restored as quickly as possible.
authors.affiliation: University of São Paulo Faculty of Dentistry, Ribeirão Preto, Brazil. fabriciodspg@hotmail.com
authors.forename: Fabrício Dias
authors.initials: FD
authors.lastname: de Souza
authors.forename: Jesus Djalma
authors.initials: JD
authors.lastname: Pécora
authors.forename: Ricardo Gariba
authors.initials: RG
authors.lastname: Silva
mesh_terms: D000538:Aluminum Silicates; D017438:Bisphenol A-Glycidyl Methacrylate / Q000627:therapeutic use; D002244:Carbon; D002614:Chelating Agents / Q000627:therapeutic use*; D004396:Coloring Agents; D003481:Cuspid; D003763:Dental Leakage / Q000145:classification*; D003786:Dental Pulp Cavity / Q000473:pathology; D017220:Dentin-Bonding Agents / Q000627:therapeutic use; D004492:Edetic Acid / Q000627:therapeutic use*; D004871:Erbium; D006801:Humans; D053685:Laser Therapy; D008689:Methacrylates / Q000627:therapeutic use; D019279:Resin Cements / Q000627:therapeutic use*; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D012388:Root Canal Irrigants / Q000627:therapeutic use; D018915:Root Canal Preparation / Q000379:methods*; D016369:Smear Layer; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D015019:Yttrium
chemical_list: D000538:Aluminum Silicates; D002614:Chelating Agents; D004396:Coloring Agents; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D019279:Resin Cements; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; C084543:Super Bond D-Liner; C028433:chinese ink; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate; D015019:Yttrium; D002244:Carbon; D004871:Erbium; D004492:Edetic Acid; D012973:Sodium Hypochlorite