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.
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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)
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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
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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)
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