Effect of saliva contamination on bond strength of resin luting cements to dentin

J Dent. 2009 Dec;37(12):923-31. doi: 10.1016/j.jdent.2009.07.007. Epub 2009 Aug 4.

Abstract

Objectives: This study examined the effect of saliva contamination on the microtensile bond strength (microTBS) of resin luting cements to dentin.

Methods: For RelyX ARC (ARC, 3M ESPE), dentin surfaces were etched with 32% phosphoric acid. The subgroups were: ARC-control (uncontaminated), ARC-I (saliva contamination, blot-dried), ARC-II (saliva contamination, rinse, blot-dried) and ARC-III (saliva contamination, rinse, re-etch, rinse, blot-dried). For Panavia F 2.0 (PF, Kuraray), the subgroups were: PF-control (uncontaminated), PF-I (saliva contamination, dried), PF-II (saliva contamination, rinse, dried), PF-III (primer, saliva contamination, dried), PF-IV (primer, saliva contamination, dried, primer re-applied) and PF-V (primer, saliva contamination, rinse, dried, primer re-applied). Composite blocks were luted onto dentin using the two cements. Bonded specimens were sectioned into 0.9 mm x 0.9 mm beams for muTBS testing. Representative fractured beams were prepared for fractographic analysis.

Results: For ARC, salivary contamination of etched dentin (ARC-I) significantly lowered bond strength (p=0.001). Rinsing saliva off with water (ARC-II) restored bond strength to control level. Re-etching dentin surface after rinsing (ARC-III) resulted in the lowest bond strength (p<0.001). For PF, salivary contamination of dentin before (PF-I) and after application of primer (PF-III and PF-IV) significantly lowered bond strength (p<0.001). Rinsing saliva off with water and re-application of primer (PF-II and PF-V) improved bond strength.

Conclusion: Saliva contamination during luting deteriorated the bond quality of resin cements. Decontamination by rinsing with water was most effective in restoring the bond strength of RelyX ARC. Decontamination by water-rinsing and primer re-application after rinsing improved the bond strength of Panavia F 2.0.

Publication types

  • Comparative Study
  • Randomized Controlled Trial

MeSH terms

  • Acid Etching, Dental / methods
  • Adhesiveness
  • Bisphenol A-Glycidyl Methacrylate / chemistry
  • Carbon Compounds, Inorganic / chemistry
  • Dental Bonding*
  • Dental Cements / chemistry
  • Dental Stress Analysis
  • Dentin / ultrastructure*
  • Dentin-Bonding Agents / chemistry
  • Humans
  • Materials Testing
  • Methacrylates / chemistry
  • Phosphoric Acids / chemistry
  • Polyethylene Glycols / chemistry
  • Polymethacrylic Acids / chemistry
  • Polyurethanes / chemistry
  • Resin Cements / chemistry*
  • Saliva / physiology*
  • Silicon Compounds / chemistry
  • Stress, Mechanical
  • Surface Properties
  • Tensile Strength
  • Water / chemistry

Substances

  • Bis-GMA, BPDM, HEMA dental-bonding resin
  • Carbon Compounds, Inorganic
  • Clearfil Porcelain Bond
  • Clearfil SE Bond
  • Dental Cements
  • Dentin-Bonding Agents
  • ED Primer II
  • Methacrylates
  • Panavia-Fluoro
  • Phosphoric Acids
  • Polymethacrylic Acids
  • Polyurethanes
  • RelyX ARC
  • Resin Cements
  • Silicon Compounds
  • Single Bond Plus
  • urethanetrimethacrylate
  • Water
  • Polyethylene Glycols
  • Bisphenol A-Glycidyl Methacrylate
  • phosphoric acid
  • silicon carbide