title: Cavity wall adaptation of resin-based composites lined with flowable composites.
abstract: OBJECTIVE
  To compare the adhesion of a flowable resin-based composite (RBC) vs. a condensable RBC to tooth structure using scanning electron microscopy (SEM).
  
  
  METHODS
  Fifteen recently extracted human teeth were prepared for Class I restorations and equally divided into three groups. Group 1 was filled with Heliomolar bonded with Syntac Single Component. Group 2 was lined with Flow-It in addition to ALERT condensable RBC bonded with Bond-1 Primer/Adhesive. Group 3 was filled with ALERT bonded with Bond-1 Primer/Adhesive. All teeth were thermocycled, sectioned and evaluated for gap formation with the SEM.
  
  
  RESULTS
  SEM at x15 demonstrated that restorations with the flowable RBC at the tooth/restoration interface showed no evidence of marginal gaps between the RBC material or at the underlying tooth structure. A significant difference (P < 0.05) in wall adaptation was found between Groups 2 and 3.
authors.affiliation: Division of Restorative and Prosthodontic Sciences, New York University College of Dentistry, NY 10010, USA. de1@is.nyu.edu
authors.forename: D
authors.initials: D
authors.lastname: Estafan
authors.forename: A
authors.initials: A
authors.lastname: Estafan
authors.forename: K F
authors.initials: KF
authors.lastname: Leinfelder
mesh_terms: D000134:Acid Etching, Dental; D000180:Acrylic Resins / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003737:Dental Cavity Preparation / Q000145:classification; D003743:Dental Enamel / Q000648:ultrastructure; D003763:Dental Leakage / Q000145:classification; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000145:classification; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D011140:Polyurethanes / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D013223:Statistics as Topic; D013499:Surface Properties; D013816:Thermodynamics; D014783:Viscosity
chemical_list: D000180:Acrylic Resins; C406265:Alert composite resin; C115611:BOND-1 adhesive; C029012:Composite Dental Resin; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C513708:Heliomolar; D008689:Methacrylates; D011140:Polyurethanes; D019279:Resin Cements; C078484:Syntac dentine adhesive; C111840:flowable hybrid composite