Shear bond strength of composite resins to lithium disilicate ceramics using universal bonding and different methods of surface preparation

Abstract

Background: Porcelain fracture or chipping is one of the limitations of all ceramic restorations.
This study investigated the shear bond strength (SBS) of composite resins to lithium disilicate
ceramics using universal bondings and different methods of surface preparation.
Materials and Methods: In this experimental study, 72 specimens of e.max computer‑aided design
and computer‑aided manufacturing (CAD/CAM) ceramic blocks were divided into six groups of
12 according to surface treatment: Group I‑Hydrofluoric (HF) acid etching + All‑Bond Universal
bonding (ABU), Group II‑Bur roughening (BR) + HF + ABU, Group III‑BR + HF + Bis‑Silane (Si) +
ABU, Group IV‑Sandblasting (SB) + ABU, Group V‑SB + HF + ABU, Group VI‑SB + HF + Si + ABU.
After bonding of composite resin to the prepared ceramic surface and storage of samples in distilled
water for 24 h, SBS test was done using the universal testing machine at a crosshead speed of
0.5 mm/min. Data were analyzed using the analysis of variance and Tukey’s post hoc test (α = 0.05).
Results: The mean values of SBS in six studied groups were 6.65 ± 2.78 MPa, 8.56 ± 2.69 MPa,
8.49 ± 2.14 MPa, 3.13 ± 1.66 MPa, 7.94 ± 2.4 MPa, and 10.04 ± 2.47 MPa, respectively. The mean
values of SBS were significantly different (P < 0.001). The highest value of SBS was observed in
Group VI and the lowest in Group IV.
Conclusion: Ceramic sandblasting followed by HF etching, Bis Si, and ABU resulted in a higher
SBS of composite resins to lithium disilicate ceramics.
Key Words: Ceramics, composite resins, dentine‑bonding agents, silanes

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Amirhossein Fathi: Pubmed,Google Scholar