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

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.

• Authors: C W M Chung, C K Y Yiu, N M King, N Hiraishi, F R Tay
• Journal: Journal of dentistry (J Dent) Vol. 37 Issue 12 Pg. 923-31 (Dec 2009) ISSN: 1879-176X [Electronic] England
• PMID: 19660517 (Publication Type: Comparative Study, Journal Article, Randomized Controlled Trial)

Chemical References

• 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

Topics

• 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)