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KMID : 1023820170090060439
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The Journal of Advanced Prosthodontics
2017 Volume.9 No. 6 p.439 ~ p.446
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Influence of different surface treatments on bond strength of novel CAD/CAM restorative materials to resin cement
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Komurcuoglu Meltem Bektas
Sagirkaya Elcin
Tulga Ayca
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Abstract
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PURPOSE: To evaluate the effects of different surface treatments on the bond strength of novel CAD/CAM restorative materials to resin cement by four point bending test.
MATERIALS AND METHODS: The CAD/CAM materials under investigation were e.max CAD, Mark II, Lava Ultimate, and Enamic. A total of 400 bar specimens (4×1.2×12 mm) (n=10) milled from the CAD/CAM blocks underwent various pretreatments (no pretreatment (C), hydrofluoric acid (A), hydrofluoric acid + universal adhesive (Scotchbond) (AS), sandblasting (Sb), and sandblasting + universal adhesive (SbS)). The bars were luted end-to-end on the prepared surfaces with a dual curing adhesive resin cement (Variolink N, Ivoclar Vivadent) on the custom-made stainless steel mold. Ten test specimens for each treatment and material combination were performed with four point bending test method. Data were analyzed using ANOVA and Tukey's test.
RESULTS: The surface treatment and type of CAD/CAM restorative material showed a significant effect on the four point bending strength (FPBS) (P<.001). For LDC, AS surface treatment showed the highest FPBS results (100.31 ± 10.7 MPa) and the lowest values were obtained in RNC (23.63 ± 9.0 MPa) for control group. SEM analyses showed that the surface topography of CAD/CAM restorative materials was modified after treatments.
CONCLUSION: The surface treatment of sandblasting or HF acid etching in combination with a universal adhesive containing MDP can be suggested for the adhesive cementation of the novel CAD/CAM restorative materials.
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KEYWORD
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Adhesive cementation, Four point bending test, Resin nano ceramic, Polymer infiltrated ceramic network, Surface treatments, Universal adhesive
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