The Effect of Different Surface Conditioning Techniques on the Bonding between Resin Cement & Ceramic

Abstract

Surface etching before cementation is a vital step that determines the clinical performance of ceramic restorations. Etching alters surface topography that contributes effective bonding between ceramic restoration and resin cement. This study aimed to compare etching techniques to determine the most effective etching method contributing the highest bond strength that helps in improving dental implants. Materials and methods: sixty discs of feldspathic ceramic measuring 10 mm diameter and 4 mm thickness were prepared. The 60 samples were divided into four equal groups based on the surface treatment technique used: group A: 9.6% hydrofluoric acid; group B: coarse diamond burs; group C: CO2 laser; and group D: no treatment. Ceramic disc specimens were examined under a Scanning Electron microscope (SEM) after surface treatment to characterize their surface morphology. Further, the specimens were luted with a resin luting agent and incubated for 24 h at a temperature of 37 °C simulating the oral environment. After 24 h, shear bond strength (SBS) and the nature of bond failure was determined for each specimen using a universal Instron testing machine. Results: significant change in surface morphology was noticed on hydrofluoric acid treatment forming larger irregular roughness (4.83 ± 1.78 µm) with multiple patterns of grooves and pores compared to other groups. Further, the highest SBS value was measured on hydrofluoric acid etching that display the highest bond strength due to the high surface roughness. In conclusion, our findings report a strong association between the surface roughness and bond strength upon hydrofluoric acid compared to other methods. Further work in this direction will enhance the utility of the etching technique on the improvement of dental implants.

Evaluation of the Influence of Acid Etching Technique on Surface Roughness and Fracture Strength of Heat-Pressed Lithium-disilicate Veneers

“…6,7 Hence, the study was conducted to determine the combined effect of hydrofluoric acid and phosphoric acid on the surface of lithium-disilicate veneers. [8][9][10] In this study, the heat-pressed veneers were milled and sintered before bonding the veneers to the tooth structure. The total number of 22 samples were divided into two groups: 11 samples in group A and 11 samples in group B.…”

Evaluation of the Effect of Various Cementation Protocols Used for 10% Zirconia-Reinforced Lithium Glass Ceramic Veneer on Shear Bond Strength to Resin Cement (An In Vitro Study)

“…Treating the ceramic surface to increase surface roughness is a key to the success and prognosis of the bond strength between ceramic and resin luting cement, which may increase the bond strength between the ceramic surface and the resin cement [24][25][26]. The recently introduced fully crystallized glass ceramic, ZLS, which can be cemented directly after milling with simple polishing or heating for 10 min, has also helped to decrease treatment time.…”

Roughness of the Surface of Zirconia Reinforced Lithium Disilicate Ceramic Treated by Different Procedures

“…Laser irradiation is considered a modern method for treating ceramic surfaces. Lasers concentrate and focus an enormous amount of energy on a small target area, which causes micromorphological physical changes by absorbing the energy [15]. Sevmez and Yilmaz demonstrated that different surface treatments have different effects on surface roughness and bond strength in ZLS, but also that higher surface roughness does not always lead to higher bond strength [14].…”