Shear bond strength of a new self-adhering flowable composite resin for lithium disilicate-reinforced CAD/CAM ceramic material.
- Author:
Ugur ERDEMIR
1
;
Hande Sar SANCAKLI
;
Erkan SANCAKLI
;
Meltem Mert EREN
;
Sevda OZEL
;
Taner YUCEL
;
Esra YILDIZ
Author Information
- Publication Type:Original Article
- Keywords: Surface pretreatments; Shear bond strength; Vertise flow; Er:YAG laser; Tribochemical silica coating; CAD/CAM ceramic
- MeSH: Ceramics*; Dental Instruments; Fungi; Hydrofluoric Acid; Lithium*; Microscopy, Atomic Force; Polytetrafluoroethylene; Silicon Dioxide
- From:The Journal of Advanced Prosthodontics 2014;6(6):434-443
- CountryRepublic of Korea
- Language:English
- Abstract: PURPOSE: The purpose of this study was to evaluate and compare the effects of different surface pretreatment techniques on the surface roughness and shear bond strength of a new self-adhering flowable composite resin for use with lithium disilicate-reinforced CAD/CAM ceramic material. MATERIALS AND METHODS: A total of one hundred thirty lithium disilicate CAD/CAM ceramic plates with dimensions of 6 mm x 4 mm and 3 mm thick were prepared. Specimens were then assigned into five groups (n=26) as follows: untreated control, coating with 30 microm silica oxide particles (Cojet(TM) Sand), 9.6% hydrofluoric acid etching, Er:YAG laser irradiation, and grinding with a high-speed fine diamond bur. A self-adhering flowable composite resin (Vertise Flow) was applied onto the pre-treated ceramic plates using the Ultradent shear bond Teflon mold system. Surface roughness was measured by atomic force microscopy. Shear bond strength test were performed using a universal testing machine at a crosshead speed of 1 mm/min. Surface roughness data were analyzed by one-way ANOVA and the Tukey HSD tests. Shear bond strength test values were analyzed by Kruskal-Wallis and Mann-Whitney U tests at alpha=.05. RESULTS: Hydrofluoric acid etching and grinding with high-speed fine diamond bur produced significantly higher surface roughness than the other pretreatment groups (P<.05). Hydrofluoric acid etching and silica coating yielded the highest shear bond strength values (P<.001). CONCLUSION: Self-adhering flowable composite resin used as repair composite resin exhibited very low bond strength irrespective of the surface pretreatments used.
