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Open AccessArticle

Effect of Decontamination Treatments on Micro-Shear Bond Strength between Blood–Saliva-Contaminated Post-Etched Dentin Substrate and Composite Resin

Department of Prosthodontics, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia
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Healthcare 2019, 7(4), 128; https://doi.org/10.3390/healthcare7040128
Received: 22 September 2019 / Revised: 26 October 2019 / Accepted: 28 October 2019 / Published: 1 November 2019
(This article belongs to the Section Healthcare Quality and Patient Safety)
Blood–saliva contamination negatively affects the bonding potential of adhesive agents. The study aimed to assess the effect of various cleaning protocols on micro-shear bond strength (μSBS) between blood–saliva-contaminated post-etched dentin and composite resin in total-etch and self-etch adhesives. The cleaning methods tested were water rinsing, 37.5% phosphoric acid (H3PO4) re-etching, 6% sodium hypochlorite (NaoCl), 2% chlorhexidine gluconate (CXG), isopropyl alcohol (IPA), and pumice. Nono-hybrid composite cylinders with a 3-mm diameter and 2-mm height were directly cured over the dentin substrate, stored for 24 h, and subjected to 12,000 thermocycles. The shear force was exerted with a 200-μm knife-edged chisel-shaped head from a universal testing machine. The type of failure was assessed with stereomicroscope magnified images. The obtained data were evaluated by Kruskal–Wallis and Mann–Whitney U post-hoc tests. Water-rinsed contaminated dentin surfaces showed substantially reduced μSBS in the total etch from 25.93 to 20.29 Mpa and the corresponding values for the one-step self-etch adhesive were 10.10 to 8.8. Re-etching with 37.5% H3Po4 resulted in a recovery of bonding potential in both total-etch (24.58 Mpa) and self-etch adhesive (9.23 Mpa). Alternately, NaoCl and pumice cleaning showed promising results for the total-etch (23.51 Mpa) and self-etch (7.79 Mpa). View Full-Text
Keywords: dentin bonding agents; blood–saliva contamination; micro-shear bond strength; dentin decontamination method dentin bonding agents; blood–saliva contamination; micro-shear bond strength; dentin decontamination method
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Haralur, S.B.; Alharthi, S.M.; Abohasel, S.A.; alqahtani, K.M. Effect of Decontamination Treatments on Micro-Shear Bond Strength between Blood–Saliva-Contaminated Post-Etched Dentin Substrate and Composite Resin. Healthcare 2019, 7, 128.

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