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The Journal of Adhesive Dentistry
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J Adhes Dent 17 (2015), No. 3     13. Aug. 2015
J Adhes Dent 17 (2015), No. 3  (13.08.2015)

Page 273-281, doi:10.3290/j.jad.a34413, PubMed:26159129


Long-term Bond Strength between Layering Indirect Composite Material and Zirconia Coated with Silicabased Ceramics
Fushiki, Ryosuke / Komine, Futoshi / Honda, Junichi / Kamio, Shingo / Blatz, Markus B. / Matsumura, Hideo
Purpose: This study evaluated the long-term shear bond strength between an indirect composite material and a zirconia framework coated with silica-based ceramics, taking the effect of different primers into account.
Materials and Methods: A total of 165 airborne-particle abraded zirconia disks were subjected to one of three pretreatments: no pretreatment (ZR-AB), airborne-particle abrasion of zirconia coated with feldspathic porcelain (ZR-PO-AB), and 9.5% hydrofluoric acid etching of zirconia coated with feldspathic porcelain (ZR-PO-HF). An indirect composite material (Estenia C&B) was then bonded to the zirconia disks after they were treated with one of the following primers: Clearfil Photo Bond (CPB), Clearfil Photo Bond with Clearfil Porcelain Bond Activator (CPB + Activator), Estenia Opaque Primer (EOP), Porcelain Liner M Liquid B (PLB), or no priming (CON, control group). Shear bond strength was tested after 100,000 thermocycles, and the data were analyzed using the Steel-Dwass U-test (α = 0.05).
Results: For ZR-PO-AB and ZR-PO-HF specimens, bond strength was highest in the CPB+Activator group (25.8 MPa and 22.4 MPa, respectively). Bond strengths were significantly lower for ZR-AB specimens in the CON and PLB groups and for ZR-PO-AB specimens in the CON, CPB, and EOP groups.
Conclusion: Combined application of a hydrophobic phosphate monomer (MDP) and silane coupling agent enhanced the long-term bond strength of indirect composite material to a zirconia coated with silica-based ceramics.

Keywords: bond strength, coating, indirect composite, priming agent, zirconia