Exposed Dentin: Influence of Cleaning Procedures and Simulated Pulpal Pressure on Bond Strength of a Universal Adhesive System.

Flury, Simon; Peutzfeldt, Anne; Schmidlin, Patrick R; Lussi, Adrian (2017). Exposed Dentin: Influence of Cleaning Procedures and Simulated Pulpal Pressure on Bond Strength of a Universal Adhesive System. PLoS ONE, 12(1), e0169680. Public Library of Science 10.1371/journal.pone.0169680

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PURPOSE To compare various pre-treatments serving as cleaning procedures of dentin on the bond strength of resin composite promoted by a universal adhesive system applied either in the absence or presence of simulated pulpal pressure. MATERIALS AND METHODS Prior to application of the adhesive system (Scotchbond Universal) and resin composite (Filtek Z250), ground dentin surfaces were given one of five pre-treatments either without or with simulated pulpal pressure: 1) no pre-treatment, adhesive system in "self-etch" mode, 2) phosphoric acid etching, adhesive system in "total-etch" mode, 3) polishing with pumice on prophylaxis cup, 4) air abrasion with AIR-FLOW PLUS powder, 5) air abrasion with AIR-FLOW PERIO powder; n = 20/group of pre-treatment. After storage (37°C, 100% humidity, 24 h), micro shear bond strength was measured and data analyzed with parametric ANOVA including Bonferroni-Holm correction for multiple testing followed by Student's t tests (significance level: α = 0.05). RESULTS The ANOVA found type of pre-treatment and simulated pulpal pressure to have no significant effect on dentin bond strength. The explorative post-hoc tests showed a negative effect of simulated pulpal pressure for phosphoric acid etching (adhesive system in "total-etch" mode; p = 0.020), but not for the other four pre-treatments (all p = 1.000). CONCLUSION Air abrasion with powders containing either erythritol and chlorhexidine (AIR-FLOW PLUS) or glycine (AIR-FLOW PERIO) yielded dentin bond strengths similar to no pre-treatment, phosphoric acid etching, or polishing with pumice. Simulated pulpal pressure reduced the bond strength only when the self-etch adhesive system was used in total-etch mode.

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:

Flury, Simon; Peutzfeldt, Anne and Lussi, Adrian

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1932-6203

Publisher:

Public Library of Science

Language:

English

Submitter:

Simon Flury

Date Deposited:

26 Jan 2017 14:29

Last Modified:

26 Jan 2017 14:29

Publisher DOI:

10.1371/journal.pone.0169680

PubMed ID:

28081572

BORIS DOI:

10.7892/boris.93875

URI:

https://boris.unibe.ch/id/eprint/93875

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