title: Effect of decontamination on micro-shear bond strength of silorane-based composite increments.
abstract: OBJECTIVE
  The aim of the present study was to evaluate the micro-shear bond strength of silorane-based composites after saliva/blood decontamination.
  
  
  METHODS
  A transparent mold (1 × 2 × 1 cm) was used to make 11 flat, silorane-based composite blocks. One block served as the control. After contamination, the blocks were treated as follows: group 1: 10-s air spray; group 2: 10-s water spray + 10-s air spray; group 3: 10-s water spray + 10-s air spray + 10-s etching with phosphoric acid; group 4: 10-s air spray + 10-s etching + bonding; group 5: 10-s water spray + 10-s air spray + 10-s etching + bonding; and groups 6-10: treated the same as groups 1-5, the only difference being that blood was used instead of saliva. Ten tubes (0.7 mm × 1 mm) containing silorane-based composites were attached to each decontaminated block and light cured for 40 s. After 24-h storage in distilled water, specimens were tested under micro-shear loading at a cross-head speed of 0.5 mm/min. Data were analyzed using one-way anova and Tukey's honest significant difference (HSD) test (P < 0.05).
  
  
  RESULTS
  One-way anova showed significant differences in the micro-shear bond strength among the experimental groups (P < 0.001). Tukey's HSD test revealed that the bond strengths in groups 5, 9, and 10 were similar to the control group (P > 0.05).
  
  
  CONCLUSIONS
  Decontamination by water and air spray, etching, and bonding was effective in restoring the bond strength of silorane-based composite increments.
authors.affiliation: Dental Research Center, Research Institute of Dental Sciences, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Seyedeh Mahsa
authors.initials: SM
authors.lastname: Sheikh-Al-Eslamian
authors.affiliation: Dental Research Center, Research Institute of Dental Sciences, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Narges
authors.initials: N
authors.lastname: Panahandeh
authors.affiliation: Dental Research Center, Research Institute of Dental Sciences, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Najafi-Abrandabadi
authors.affiliation: Dental Research Center, Research Institute of Dental Sciences, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Elham
authors.initials: E
authors.lastname: Hasani
authors.affiliation: Iranian Center for Endodontic Research, Research Institute of Dental Sciences, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Hassan
authors.initials: H
authors.lastname: Torabzadeh
authors.affiliation: Preventive Dentistry Research Center, Research Institute of Dental Sciences, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Amir
authors.initials: A
authors.lastname: Ghassemi
mesh_terms: D000704:Analysis of Variance; D001769:Blood; D003666:Decontamination; D001840:Dental Bonding; D003799:Dental Stress Analysis; D006801:Humans; D008422:Materials Testing; D012463:Saliva; D033081:Shear Strength; D062047:Silorane Resins / Q000737:chemistry
chemical_list: D062047:Silorane Resins
keywords: contamination; shear bond strength; silorane system adhesive; silorane-based composite; surface treatment