Influence of Primers and Additional Resin Layer on Zirconia Repair Bond Strength

Abstract

Purpose To evaluate the influence of alloy/zirconia primer and 10‐methacryloyloxydecyl dihydrogen phosphate (MDP)‐containing resin layer treatments on the shear bond strength (SBS) of composite resin to zirconia after aging. Materials and Methods Sixty zirconia (Y‐TZP) blocks were air‐abraded (35‐µm Al2O3) and divided into 6 experimental groups (n = 10) in terms of primer/resin layer as follows: (1) control, without any primer or resin; (2) AP, Alloy Primer; (3) ZPP, Z‐Prime Plus; (4) PL/ZPP, Z‐Prime Plus with light polymerization; (5) AP+SEB, Alloy Primer along with light‐cured bonding resin of a self‐etch adhesive system (SE Bond); and (6) ZPP+SEB, Z‐Prime Plus with SE Bond. After composite resin placement and light polymerization, the specimens were stored in distilled water (37°C for 4 months) and thermal‐cycled for 6000 cycles. The SBS was tested with a universal testing machine. Statistical analysis of the SBS data was performed with one‐way ANOVA, followed by HSD Tukey test (α = 0.05). Results There were significant differences between the groups (p < 0.001, F = 116.5). All the groups revealed significantly higher SBS than the control (p < 0.001). ZPP+SEB group exhibited the highest SBS (16.14 ± 2.52 MPa) and AP group the lowest SBS (7.00 ± 1.97 MPa) among experimental groups; both had significant differences with the other groups (p < 0.001). There were no significant differences between ZPP, PL/ZPP, and AP+SEB groups (p > 0.05). Conclusions The bond strength between zirconia ceramic and composite resin was affected by different primers/resin layer. Applying an MDP‐containing resin layer along with both primers resulted in significant enhancement of SBS. This improvement for Z‐Prime Plus was significantly higher than that of Alloy Primer.

Effect of Different Surface Treatment Methods on the Shear Bond Strength of Resin Composite/Zirconia for Intra-oral Repair of Zirconia Restorations

“…In general, the reported bond strength from different studies could not be directly compared due to various study conditions such as different test methods, bonding surface area, and aging protocols. 29 There are clearly some limitations with this study. In the clinical situation when chipping occurs in the veneered zirconia crowns, the surface to be repaired comprises two different substrates; zirconia and surrounding porcelain, with the porcelain being susceptible to hydrofluoric acid etching.…”

Effect of Air-Abraded Versus Laser-Fused Fluorapatite Glass-Ceramics on Shear Bond Strength of Repair Materials to Zirconia

“…The mode of failure of debonded specimens was evaluated under SEM (Zeiss EVO 60, Germany). Failure modes were assigned to be [27] as follows:…”

The Effect of Multiple Applications of Phosphate-Containing Primer on Shear Bond Strength between Zirconia and Resin Composite

“…Shafiei et al found that using an adhesive combined with a 10- MDP-containing primer leads to a statistically significant increase in shear bond strength. The interface was stable since the adhesive was applied and the light cure occurred, resulting in increased shear bonding ability between the zirconia and the resin composite [ 18 ]. According to Klaisiri et al, the combination of alloy primer and adhesive produced a greater shear bond strength than either alloy primer or adhesive alone [ 19 ].…”