title: Effects of resin luting agents and 1% NaOCl on the marginal fit of indirect composite restorations in primary teeth.
abstract: OBJECTIVE
  The purpose of this study was to provide information regarding the marginal adaptation of composite resin onlays in primary teeth previously treated with 1% sodium hypochlorite (NaOCl) (pulp irrigant) using two different resin luting agents.
  
  
  METHODS
  Forty extracted sound primary molars had their crowns prepared in a standardized machine and were randomly divided into 4 groups (n=10): G1 (1% NaOCl irrigation+EnForce); G2 (EnForce); G3 (1% NaOCl irrigation+Rely X); G4 (Rely X). The onlays were made with Z250 composite resin on plaster models. After luting, the tooth/restoration set was stored in 100% relative humidity at 37ºC for 24 h and finished with Soflex discs. Caries Detector solution was applied at the tooth/restoration interface for 5 s. The specimens were washed and four digital photos of each tooth were then taken. The extents of the gaps were measured with Image Tool 3.0 software. The percentage data were submitted to a Kruskal-Wallis test (α=0.05). The Relative Risk test analyzed the chance of a gap presence correlated to each group.
  
  
  RESULTS
  There were no statistically significant differences (p>0.05) among the groups. The relative risk test revealed that some groups were more apt to have a presence of gaps than others.
  
  
  CONCLUSIONS
  Neither the 1% NaOCl treatment nor the resin luting agents caused any alterations in the dental substrate that could have influenced the marginal adaptation of composite onlays in primary teeth.
authors: Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
authors: Ana Flávia Sanches
authors: AF
authors: Borges
authors: Luciana Estevam
authors: LE
authors: Simonato
authors: Fernanda Miori
authors: FM
authors: Pascon
authors: Kamila Rosamiglia
authors: KR
authors: Kantowitz
authors: Regina Maria Puppin
authors: RM
authors: Rontani
mesh_terms: D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods; D003738:Dental Cements / Q000737:chemistry*; D018772:Dental Marginal Adaptation; D003804:Dentin / Q000737:chemistry; D006801:Humans; D007284:Inlays / Q000379:methods; D008422:Materials Testing; D011897:Random Allocation; D012973:Sodium Hypochlorite / Q000737:chemistry*; D013499:Surface Properties; D014094:Tooth, Deciduous
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D012973:Sodium Hypochlorite