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Impact of plasma treatment of PMMA-based CAD/CAM blanks on surface properties as well as on adhesion to self-adhesive resin composite cements


Liebermann, Anja; Keul, Christine; Bähr, Nora; Edelhoff, Daniel; Eichberger, Marlis; Roos, Malgorzata; Stawarczyk, Bogna (2013). Impact of plasma treatment of PMMA-based CAD/CAM blanks on surface properties as well as on adhesion to self-adhesive resin composite cements. Dental Materials, 29(9):935-944.

Abstract

OBJECTIVES: To test surface energy, roughness and tensile bond strength (TBS) to self-adhesive resin composite cements without/with plasma treatment combined with different conditioning methods of PMMA-based CAD/CAM blocks.
METHODS: PMMA specimens (10mm×10mm×2mm) were fabricated (N=260), polished and air-abraded (50μm Al2O3, 5s, 0.05MPa). Twenty specimens were selected for surface energy and roughness measurements (without/with plasma n=10 per group). The remaining specimens (n=240) were used for TBS testing without/with plasma treatment and following conditioning methods (n=20 per test group): (i) without conditioning, (ii) Visio.link, (iii) VP connect and luted with Clearfil SA Cement and RelyX Unicem Automix. Specimens were aged (24h 37°C water+5000 thermal cycles, 5°C/55°C), TBS was measured and failure types were assessed. Data were analyzed using descriptive statistics, Mann-Whitney-U and Kruskal-Wallis-H tests, unpaired t-test, Chi(2) and the Spearman correlation test.
RESULTS: Plasma treatment of PMMA increased the surface energy significantly (p<0.001) but had no impact on the surface roughness (p=0.718). Groups without plasma treatment showed higher TBS than plasma treated groups (p<0.001 to p=0.011), except PMMA conditioned with VP connect and luted using RelyX Unicem Automix (p=0.03). Clearfil SA Cement showed higher TBS compared to RelyX Unicem Automix, except for groups conditioned with Visio.link. Both resin composite cements showed the highest TBS for groups conditioned with Visio.link. Also, among Clearfil SA Cement, conditioning with VP connect showed comparable TBS to Visio.link.
SIGNIFICANCE: Plasma treatment of PMMA did not increase the adhesion to self-adhesive resin composite cements.

OBJECTIVES: To test surface energy, roughness and tensile bond strength (TBS) to self-adhesive resin composite cements without/with plasma treatment combined with different conditioning methods of PMMA-based CAD/CAM blocks.
METHODS: PMMA specimens (10mm×10mm×2mm) were fabricated (N=260), polished and air-abraded (50μm Al2O3, 5s, 0.05MPa). Twenty specimens were selected for surface energy and roughness measurements (without/with plasma n=10 per group). The remaining specimens (n=240) were used for TBS testing without/with plasma treatment and following conditioning methods (n=20 per test group): (i) without conditioning, (ii) Visio.link, (iii) VP connect and luted with Clearfil SA Cement and RelyX Unicem Automix. Specimens were aged (24h 37°C water+5000 thermal cycles, 5°C/55°C), TBS was measured and failure types were assessed. Data were analyzed using descriptive statistics, Mann-Whitney-U and Kruskal-Wallis-H tests, unpaired t-test, Chi(2) and the Spearman correlation test.
RESULTS: Plasma treatment of PMMA increased the surface energy significantly (p<0.001) but had no impact on the surface roughness (p=0.718). Groups without plasma treatment showed higher TBS than plasma treated groups (p<0.001 to p=0.011), except PMMA conditioned with VP connect and luted using RelyX Unicem Automix (p=0.03). Clearfil SA Cement showed higher TBS compared to RelyX Unicem Automix, except for groups conditioned with Visio.link. Both resin composite cements showed the highest TBS for groups conditioned with Visio.link. Also, among Clearfil SA Cement, conditioning with VP connect showed comparable TBS to Visio.link.
SIGNIFICANCE: Plasma treatment of PMMA did not increase the adhesion to self-adhesive resin composite cements.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Epidemiology, Biostatistics and Prevention Institute (EBPI)
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:2013
Deposited On:20 Jan 2014 10:48
Last Modified:05 Apr 2016 17:23
Publisher:Elsevier
ISSN:0109-5641
Publisher DOI:https://doi.org/10.1016/j.dental.2013.06.004
PubMed ID:23880323
Permanent URL: https://doi.org/10.5167/uzh-88326

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