Improving shear bond strength of temporary crown and fixed dental prosthesis resins by surface treatments

Abstract

This study evaluated the effect of surface treatments on the bond strength of repaired temporary resins. One-hundred flat-surfaced cylindrical specimens (Ø 7 mm 9 12 mm) of each temporary resin (2 bis-acryl resins and 2 polymethyl-methacrylates) were prepared. The specimens were randomly divided into 10 groups (n = 10), according to the types of surface treatments: untreated, adhesive treated, silanated, silane ? adhesive treated, hydrofluoric acid etched, laser treated, sandblasted, sandblasting ? adhesive treated, sandblasting ? silanated, and tribochemical silica coating ? silanated. Each resin material of the same brand with cylindrical shape (Ø 3 mm 9 3 mm) was polymerized onto the resin surfaces, and specimens were stored for 24 h in distilled water. The shear bond strengths were measured and failure modes were examined. All data were analyzed with a one-way ANOVA and multiple comparison Scheffé post hoc test (a = 0.05). For bis-acryl resins, the highest shear bond strength was observed in sandblasted group and the lowest was observed in the control group. Results show that the repair bond strength was improved for bis-acryl resin by 23 % than that of the control group due to the increase in surface roughness by sandblasting. However, chemical treatment did not improve repair bond strength. The surface treatment of bis-acryl resins with sandblasting seems to be promising for the improvement of repair bond strength.

Bonding of conventional provisional resin to 3D printed resin: the role of surface treatments and type of repair resins

“…Improving the bond strength between two materials involves increasing the surface roughness to promote mechanical retention and application of a bonding agent to promote chemical bonding. 11 15 16 17 In the present study, airborne particle abrasion using 50 µm Aluminum oxide (Al 2 O 3 ) was selected for mechanical treatment. To evaluate the sole effect of airborne particle abrasion, other means of mechanical surface treatment, such as polishing or grinding with silicone carbide paper, were excluded.…”

“… 11 20 21 22 Some studies have suggested the use of all-in-one bonding agent such as Single bond universal (3M ESPE, St. Paul, MN, USA), but it did not strengthen the bond. 11 16 17 23 The hydrophilic monomers in the bonding agent, such as HEMA, tend to absorb water and weaken the interfacial bond. 11 16 Other studies suggested using bonding agents containing methylmethacrylate (MMA) monomer, which significantly improved the shear bond strength compared to the non-pretreated group.…”

Biomechanical three-dimensional finite element analysis of monolithic zirconia crown with different cement thickness

“…Airborne-particle abrasion has provided micromechanical interlocking thank to its ability for increasing surface roughness and modifying the surface energy [31,[33][34][35]. The effect of airborne-particle abrasion may be attributed to an increase in the micromechanical retention that elevates the capability of the resin cement to interlock mechanically onto the zirconia surface [36]. When the material has no specific groups to bond to the silane coupling agent, the surface may be modified with tribochemical silica coating to attain a chemical bonding with the silane [36].…”

“…The effect of airborne-particle abrasion may be attributed to an increase in the micromechanical retention that elevates the capability of the resin cement to interlock mechanically onto the zirconia surface [36]. When the material has no specific groups to bond to the silane coupling agent, the surface may be modified with tribochemical silica coating to attain a chemical bonding with the silane [36]. Deposited silica particles on the surface could form covalent bonds through its hydroxyl groups with hydrolyzed silanol groups in the silane [36].…”

“…When the material has no specific groups to bond to the silane coupling agent, the surface may be modified with tribochemical silica coating to attain a chemical bonding with the silane [36]. Deposited silica particles on the surface could form covalent bonds through its hydroxyl groups with hydrolyzed silanol groups in the silane [36]. Silane improves wettability of resin cement as well as increases the surface energy of zirconia.…”