Effect of surface treatment and cleaning on the bond strength to polymer-infiltrated ceramic network CAD-CAM material.

Autor: Conejo J; Assistant Professor, Department of Preventive and Restorative Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, Pa. Electronic address: jconejo@upenn.edu., Ozer F; Associate Professor of Restorative Dentistry, Department of Preventive and Restorative Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, Pa., Mante F; Associate Professor, Department of Preventive and Restorative Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, Pa., Atria PJ; Assistant Professor, Department of Biomaterials, Universidad de Los Andes, Santiago, Chile., Blatz MB; Professor of Restorative Dentistry and Chairman, Department of Preventive and Restorative Sciences, Assistant Dean, University of Pennsylvania School of Dental Medicine, Philadelphia, Pa.
Jazyk: angličtina
Zdroj: The Journal of prosthetic dentistry [J Prosthet Dent] 2021 Nov; Vol. 126 (5), pp. 698-702. Date of Electronic Publication: 2020 Oct 27.
DOI: 10.1016/j.prosdent.2020.08.016
Abstrakt: Statement of Problem: Optimal composite resin bonds to polymer-infiltrated ceramic network (PICN) computer-aided design and computer-aided manufacturing (CAD-CAM) materials are essential for clinical success. However, comparative bond strength studies on the influence of different etching and cleaning methods on these materials are lacking.
Purpose: The purpose of this in vitro study was to measure and compare the microshear bond strength (μSBS) of a composite resin cement with that of a PICN material after different surface treatment and cleaning methods.
Material and Methods: Seventy specimens of a CAD-CAM PICN were divided into 7 groups (n=10): no treatment (control), hydrofluoric acid etching for 20 seconds (HF20), 60 seconds (HF60), 120 seconds (HF120), HF20 + phosphoric acid for 60 seconds and ultrasonic bath for 5 minutes, HF60 + PH, and HF120 + PH. After surface treatment, a silane coupling agent and composite resin cement were applied. Microshear bond strength was determined, and data were analyzed with 1-way ANOVA and Tukey post hoc multiple comparison tests (α=.05).
Results: All HF acid treatments resulted in a significant increase in bond strength to the polymer-infiltrated ceramic network material (P=.02). Bond strength values for HF etching for 20 seconds were significantly lower than those for 60 seconds and 120 seconds (P=.034). No difference was found between 60 seconds and 120 seconds of HF etching time (P=.986). Additional surface treatment with phosphoric acid 60 seconds and ultrasonic bath 5 minutes did not improve the bond strength beyond values obtained by hydrofluoric acid treatment only (P=.834). Most failures were cohesive.
Conclusions: Acid etching and surface treatment have significant effects on composite resin bond strength to a PICN CAD-CAM material. HF etching for 60 seconds or 120 seconds provides the highest bond strengths. Cleaning methods after etching did not have any significant effect on bond strength.
(Copyright © 2020 Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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