Long-Term Bond Strength of Self-Etch Adhesives to Normal and Artificially Eroded Dentin: Effect of Relative Humidity and Saliva Contamination.

Amsler, Fabienne; Peutzfeldt, Anne; Lussi, Adrian; Flury, Simon (2017). Long-Term Bond Strength of Self-Etch Adhesives to Normal and Artificially Eroded Dentin: Effect of Relative Humidity and Saliva Contamination. Journal of adhesive dentistry, 19(2), pp. 169-176. Quintessence Publ. 10.3290/j.jad.a38101

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PURPOSE To investigate the effect of relative humidity and saliva contamination on short- and long-term bond strength of two self-etch adhesives to normal and artificially eroded dentin. MATERIALS AND METHODS A total of 480 dentin specimens were produced from extracted human molars. Half of the specimens (n = 240) were left untreated (normal dentin) whereas the other half (n = 240) were artificially eroded. The specimens were treated with Clearfil SE Bond (CSE) or Scotchbond Universal (SBU), and composite (Filtek Z250) was applied to the treated dentin surface under four experimental conditions: at a relative humidity of 45% or 85% without/with human saliva contamination. Shear bond strength (SBS) was measured after storage for 24 h (100% humidity; 37°C) or 1 year (tap water; 37°C). SBS results were statistically analyzed with a nonparametric ANOVA followed by Wilcoxon-Mann-Whitney tests (significance level: α = 0.05). RESULTS SBS was significantly influenced by the dentin substrate (normal or artificially eroded dentin) and adhesive (p < 0.001) but not by relative humidity, saliva contamination, or storage. SBS significantly differed (all p < 0.001) following the ranking (MPa; medians [pooled]): SBU on normal dentin (21.1) > CSE on normal dentin (19.2) > SBU on artificially eroded dentin (17.1) > CSE on artificially eroded dentin (10.9). CONCLUSION On normal dentin, the two self-etch adhesives showed stable bond strength over time even under adverse conditions such as high relative humidity and saliva contamination. However, erosively altered dentin had a detrimental effect on the bond strength of both the adhesives investigated.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Preventive, Restorative and Pediatric Dentistry

UniBE Contributor:

Amsler, Fabienne; Peutzfeldt, Anne; Lussi, Adrian and Flury, Simon

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1461-5185

Publisher:

Quintessence Publ.

Language:

English

Submitter:

Simon Flury

Date Deposited:

20 Jun 2017 14:57

Last Modified:

20 Jun 2017 14:57

Publisher DOI:

10.3290/j.jad.a38101

PubMed ID:

28439578

URI:

https://boris.unibe.ch/id/eprint/99533

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