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Retention strength between veneering resin composites and laser-sintered cobalt–chromium alloy

Retention strength between veneering resin composites and laser-sintered cobalt–chromium alloy The purpose of the present study was to evaluate the retention strength between a resin composite veneering material and three types of cobalt–chromium (Co–Cr) alloy substrates. Co–Cr alloy specimens with 81 retention devices (LSR), with 144 retention devices (LDR), and without retention device (LN) were fabricated using a laser-sintering system. The specimens were air-abraded with alumina, conditioned with a primer [Alloy primer (AP) or M.L. primer (ML)], and veneered with a light-polymerized resin composite (Gradia). Three control groups (LSR-N, LDR-N, and LN-N) without primer were also prepared. After 20,000 thermocycles in 4 and 60 °C water, tensile retention strengths were determined using a universal testing machine. Data were analyzed by analysis of variance and a post hoc Tukey–Kramer HSD test (α = 0.05, n = 8). The highest retention strengths were obtained in LSR-AP (28.3 MPa), LSR-ML (23.3 MPa), LDR-AP (26.9 MPa), and LDR-ML (27.8 MPa), and these values were not significantly different. In the absence of a retention device, the retention strengths were significantly different in the following order: LN-N (0.1 MPa) < LN-ML (12.4 MPa) < LN-AP (20.2 MPa). The specimens without primer were significantly different in the following order: LN-N (0.1 MPa) < LSR-N (15.4 MPa), LDR-N (17.1 MPa). No significant difference was found between the numbers of retention devices, which were 81 and 144. In conclusion, the combined use of the primers and the retention devices is recommended when the laser-sintered Co–Cr alloy is veneered with the resin composite materials to maximize the retention strength. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Odontology Springer Journals

Retention strength between veneering resin composites and laser-sintered cobalt–chromium alloy

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References (30)

Publisher
Springer Journals
Copyright
Copyright © 2016 by The Society of The Nippon Dental University
Subject
Dentistry; Dentistry; Oral and Maxillofacial Surgery
ISSN
1618-1247
eISSN
1618-1255
DOI
10.1007/s10266-016-0257-2
pmid
27324265
Publisher site
See Article on Publisher Site

Abstract

The purpose of the present study was to evaluate the retention strength between a resin composite veneering material and three types of cobalt–chromium (Co–Cr) alloy substrates. Co–Cr alloy specimens with 81 retention devices (LSR), with 144 retention devices (LDR), and without retention device (LN) were fabricated using a laser-sintering system. The specimens were air-abraded with alumina, conditioned with a primer [Alloy primer (AP) or M.L. primer (ML)], and veneered with a light-polymerized resin composite (Gradia). Three control groups (LSR-N, LDR-N, and LN-N) without primer were also prepared. After 20,000 thermocycles in 4 and 60 °C water, tensile retention strengths were determined using a universal testing machine. Data were analyzed by analysis of variance and a post hoc Tukey–Kramer HSD test (α = 0.05, n = 8). The highest retention strengths were obtained in LSR-AP (28.3 MPa), LSR-ML (23.3 MPa), LDR-AP (26.9 MPa), and LDR-ML (27.8 MPa), and these values were not significantly different. In the absence of a retention device, the retention strengths were significantly different in the following order: LN-N (0.1 MPa) < LN-ML (12.4 MPa) < LN-AP (20.2 MPa). The specimens without primer were significantly different in the following order: LN-N (0.1 MPa) < LSR-N (15.4 MPa), LDR-N (17.1 MPa). No significant difference was found between the numbers of retention devices, which were 81 and 144. In conclusion, the combined use of the primers and the retention devices is recommended when the laser-sintered Co–Cr alloy is veneered with the resin composite materials to maximize the retention strength.

Journal

Odontology – Springer Journals

Published: Jun 20, 2016

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