title: Permeability evaluation after decay removal in primary teeth with current caries-excavation techniques.
abstract: OBJECTIVE
  The goal of the study was to evaluate the effect of caries removal by three various methods on the permeability of class II composite resin restorations in primary molar teeth.
  
  
  METHODS
  Forty-five recently extracted primary molars were randomly assigned to three groups for three different methods of caries removal; group 1-mechanical, group 2-caries detector dye, and group 3-Carisolv (n = 15). After that, class II cavities in all groups were restored with the adhesive (Opti Bond Solo Plus) that was applied according to the manufacturer's instruction and a posterior composite (Herculite XRV), which was used incrementally. After 24 hours the samples were thermocycled in water for 500 cycles between 5 and 55°C with a dwell time of 30 sec. Permeability was assessed by the fluid filtration method. The data were analyzed using the ANOVA test while study groups were compared with Tukey test for statistically significant differences at a 5% significance level.
  
  
  RESULTS
  The evaluation of tested groups indicated that the highest (0.80) and least (0.37) mean of permeability was observed in group 2 and 3 respectively. Significant difference was revealed among the tested groups (p = 0.045). The comparison of Carisolv and caries detector dye groups indicated a statistically significant difference (p = 0.037). There was not any significant difference between Carisolv or caries dye in the conventional group.
  
  
  CONCLUSIONS
  Using the chemomechanical and staining methods for caries removal had no more detrimental effect on permeability than the conventional technique. However, caries detection dye for caries removal could be more harmful than chemomechanical method.
  
  
  CONCLUSIONS
  None of the current caries-excavation techniques could eliminate permeability in class II composite resin restorations. Furthermore, staining methods do not have an adverse effect on sealing ability in comparison to the conventional technique.
authors.affiliation: Department of Pediatric Dentistry, Dental Materials Research Center, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Mahbobeh
authors.initials: M
authors.lastname: Shabzendedar
authors.forename: Horieh
authors.initials: H
authors.lastname: Moosavi
authors.forename: Maryam
authors.initials: M
authors.lastname: Talbi
authors.forename: Marjan
authors.initials: M
authors.lastname: Sharifi
mesh_terms: D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry*; D003731:Dental Caries / Q000628:therapy*; D003737:Dental Cavity Preparation / Q000295:instrumentation / Q000379:methods*; D003763:Dental Leakage / Q000145:classification; D003764:Dental Materials / Q000737:chemistry*; D003793:Dental Restoration, Permanent / Q000379:methods; D003804:Dentin / Q000473:pathology; D018698:Glutamic Acid / Q000627:therapeutic use; D006801:Humans; D007930:Leucine / Q000627:therapeutic use; D008239:Lysine / Q000627:therapeutic use; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D008963:Molar / Q000473:pathology*; D010539:Permeability; D019279:Resin Cements / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014094:Tooth, Deciduous / Q000473:pathology*; D014867:Water / Q000737:chemistry
chemical_list: C119934:Carisolv; D004396:Coloring Agents; D003188:Composite Resins; D003764:Dental Materials; C451600:OptiBond Solo Plus; D019279:Resin Cements; D014867:Water; C065770:Herculite XR; D018698:Glutamic Acid; D007930:Leucine; D008239:Lysine