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Coatings 2018, 8(7), 230; https://doi.org/10.3390/coatings8070230

Repair Bond Strength of a Resin Composite to Plasma-Treated or UV-Irradiated CAD/CAM Ceramic Surface

1
Department of Operative Dentistry, Cariology and Pulp Biology (Chiba Campus), Tokyo Dental College, Chiba 261-8502, Japan
2
Division of General Dentistry, Tokyo Dental College Chiba Dental Center, Chiba 261-8502, Japan
3
Department of Operative Dentistry, Cariology and Pulp Biology (Suidobashi Campus), Tokyo Dental College, Tokyo 101-0061, Japan
4
Department of Removable Partial Prosthodontics, Tokyo Dental College, Tokyo 101-0061, Japan
5
Oral Health Science Center, Tokyo Dental College, Tokyo 101-0061, Japan
6
Department of Endodontics, Tokyo Dental College, Tokyo 101-0061, Japan
*
Author to whom correspondence should be addressed.
Received: 6 May 2018 / Revised: 19 June 2018 / Accepted: 24 June 2018 / Published: 28 June 2018
(This article belongs to the Special Issue Advanced Bioadhesive and Bioabhesive Coatings)
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Abstract

The aim of this study was to investigate whether atmospheric-pressure plasma (APP) or ultraviolet (UV) irradiation could alter the hydrophilicity of a computer-aided design/computer-aided manufacturing (CAD/CAM) glass ceramic surface, and thereby enhance the repair bond strength between the ceramic and a resin composite. Forty-eight leucite-reinforced glass ceramic discs were treated with 40% phosphoric acid and randomly assigned into one of six groups: Group 1, control; Group 2, treated with a mixture of Clearfil SE Bond primer (SEP) and Clearfil Porcelain Bond Activator (PBA); Group 3, subjected to APP irradiation for 10 s; Group 4, subjected to UV irradiation for 60 min; Group 5, APP irradiation followed by SEP/PBA; and Group 6, UV irradiation followed by SEP/PBA. After treatment, discs were bonded with resin composite using Clearfil SE Bond and stored in water at 37 °C for 1 week. We then tested how these treatments affected the microtensile bond strength (µTBS) and measured changes in the water contact angle (CA). Samples from Group 2 showed the highest µTBS (44.3 ± 6.0 MPa) and CA (33.8 ± 2.3°), with no significant differences measured between Groups 1, 3, and 4 (p < 0.05). Furthermore, the additional treatments of APP or UV before SEP/PBA had no effect (Group 5, p = 0.229) or a reduced effect (Group 6, p = 0.006), respectively, on µTBS. Overall, APP or UV irradiation before SEP/PBA treatment did not enhance the repair bond strength. View Full-Text
Keywords: atmospheric-pressure plasma; ultraviolet; CAD/CAM; ceramic repair; microtensile bond strength atmospheric-pressure plasma; ultraviolet; CAD/CAM; ceramic repair; microtensile bond strength
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kameyama, A.; Haruyama, A.; Tanaka, A.; Noro, A.; Takahashi, T.; Yoshinari, M.; Furusawa, M.; Yamashita, S. Repair Bond Strength of a Resin Composite to Plasma-Treated or UV-Irradiated CAD/CAM Ceramic Surface. Coatings 2018, 8, 230.

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