Journal article
Influence of Surface Treatment of Glass-ionomer Cements on Bond Strength with Resin Composite: A Surface-free Energy Perspective
The Japanese Journal of Conservative Dentistry, Vol.57(4), pp.325-332
2014
DOI: 10.11471/shikahozon.57.325
Abstract
Purpose: This study evaluated the influence of the surface treatment of glass-ionomer cement (GIC) on the bond strength of resin composite and surface-free energies. Methods: One conventional GIC (Fuji IX GP) and two resin modified (RM) GICs (Fuji II LC EM, Fuji Fill LC Flow) were used. The GICs were hand-mixed according to the manufacturers' instructions, inserted into the mold and a transparent matrix was added to give a smooth surface. For RMGICs, specimens were light-irradiated for 20 s. Specimens were prepared and divided into three groups as follows: without pretreatment (control), 35% phosphoric acid etching for 10 s, and air-abrasion for 10 s. The adhesive was applied and resin composite was bonded according to the manufacturers' instructions. The bonded specimens were stored for 24 hours in distilled water at 37℃. Ten specimens per group were tested in shear mode at a cross-head speed of 1.0 mm/min. The surface-free energies of five specimens per group were determined by measuring contact angles. Data for each adhesive system were analyzed using Tukey's HSD test. Results: For conventional GIC, acid etching or air-abrasion increased the bond strength (8.7-9.2 MPa) when compared with the control (5.7 MPa); however, RMGIC resulted in significantly lower bond strengths (11.1-14.4 MPa) than in the control (16.4-21.2 MPa). The value of the γs－component increased when conventional GIC was treated with phosphoric acid or air-abrasion (54.1-62.1 mN・m－1) when compared with the control (53.2 mN・m－1). For RMGICs, lower values of the γs－component were detected for the control group (20.0-24.1 mN・m－1), indicating the presence of a resin-rich layer on the surface. Conclusion: The results of this study showed that surface treatment of the conventional GIC promoted higher bond strength to resin composite, but decreased bond strengths for RMGICs. RMGIC surfaces should be left untreated to obtain optimal bonding to resin composite, due to similar chemistry between RMGIC and the resin composite which allows strong chemical bonding of RMGIC to the resin composite.
Details
- Title: Subtitle
- Influence of Surface Treatment of Glass-ionomer Cements on Bond Strength with Resin Composite: A Surface-free Energy Perspective
- Creators
- Eiichiro Otsuka - Department of Operative Dentistry, Nihon University School of DentistryAkimasa Tsujimoto - Department of Operative Dentistry, Nihon University School of DentistryKenji Tsuchiya - Department of Operative Dentistry, Nihon University School of DentistryHirofumi Ueda - Department of Operative Dentistry, Nihon University School of DentistryTomoe Kanazawa - Department of Operative Dentistry, Nihon University School of DentistryKazutaka Hirai - Department of Operative Dentistry, Nihon University School of DentistryMasayuki Takimoto - Department of Operative Dentistry, Nihon University School of DentistryRyo Kawamoto - Department of Operative Dentistry, Nihon University School of DentistryToshiki Takamizawa - Department of Operative Dentistry, Nihon University School of DentistryMasashi Miyazaki - Department of Operative Dentistry, Nihon University School of Dentistry
- Resource Type
- Journal article
- Publication Details
- The Japanese Journal of Conservative Dentistry, Vol.57(4), pp.325-332
- Publisher
- The Japanese Society of Conservative Dentistry
- DOI
- 10.11471/shikahozon.57.325
- ISSN
- 0387-2343
- eISSN
- 2188-0808
- Language
- Japanese
- Date published
- 2014
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984176686302771
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