Effect of zirconia surface modification using dopamine polymerisation on the shear bond strength of resin cement

Abstract

This study evaluated the influence of polydopamine treatment on the surface properties and bond strength of yttria‐stabilised tetragonal zirconia polycrystal (Y‐TZP). Sixty‐three zirconia blocks (10 × 10 × 2 mm) were randomly divided into three groups defined by surface treatment: (i) control group (C), (ii) grit‐blasted with 110 μm alumina particles (GB), and (iii) polydopamine (PDA) coating. The surfaces of specimens subjected to different treatments were investigated by X‐ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and water contact angle measurements. After the surface treatments, the specimens were cemented to resin composite cylinders. After bonding, the shear bond strength of the ceramic to the resin was measured, and the failure mode of each specimen was analysed using a stereomicroscope. The results indicated that the shear bond strength is highest for the GB treatment and lowest for the controls. However, the difference between groups GB and PDA was not statistically significant. In the control group, adhesive failure was predominant, whereas in the treatment groups, mixed mode failure was predominant. The pre‐treatment of Y‐TZP ceramic with the polydopamine coating might improve the bond strength of the resin cement to the zirconia ceramic.

Preparation and evaluation of modified bisphenol‐A‐glycidyl methacrylate resin dental adhesive to zirconia

“…Therefore, the failure mode is mixed (both cohesive fracture and adhesive fracture occurred, and some resin particles remain on the surface of the adhesive and zirconia). [ 35 ] From the part pointed by the arrow in Figure 6D, it can be seen that the filler particles are evenly distributed in the resin matrix. This is because the viscosity of Bis‐GMA is reduced after modification, and the formed resin matrix is loose, which is less dense than that before modification.…”

Recent Modifications of Zirconia in Dentistry

“…The introduction of dopamine and polydopamine was approved to augment the bioactivity of the zirconia surface and enhance cell adhesion over the surface. The enhancement is attributed to the easy adsorption processes taking place on the surfaces due to the strong anchoring of the catechol functionality [68]. This type of coating also reduces bacterial adhesion on the coated surface and improves antimicrobial activity, which aids in the rapid healing and regeneration of the soft tissues surrounding the dental implants.…”

Surface Modifications for Zirconia Dental Implants: A Review

“…Additionally, PDA can be used as a cross-linking. A recent study that treated zirconia with PDA coating showed that PDA improved the bond strength between the resin cement and zirconia surface (98). The manufacture of PDA coating is easy-going and multi-functional.…”