Shear Bond Strength of Silane-Containing Universal Adhesives in Repairing Aged 3D-Printed Provisional Restorations...

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Restorative Dentistry

Background:

• The repairability of provisional restorative materials is crucial for efficient dental treatment.
• Evaluating adhesives that enhance the longevity and performance of provisional restorations is essential.

Purpose of the Study:

• To assess the impact of various silane (Si)-containing universal adhesives on the shear bond strength (SBS) of aged 3D-printed provisional restorative materials.
• To compare the effectiveness of different universal adhesives in repairing provisional dental materials.

Main Methods:

• Seventy shear bond strength (SBS) specimens and 10 energy-dispersive X-ray (EDX) specimens were fabricated from 3D-printed provisional restorative material.
• Specimens underwent thermocycling, followed by repair using seven different groups: control, Single Bond 2, Scotchbond Universal, Scotchbond Universal Plus (SUP), CLEARFIL TRI-S BOND Universal Quick, G-Premio Bond, and Silane Ultradent + Single Bond 2.
• SBS testing was conducted using a universal testing machine, with failure modes analyzed and data subjected to ANOVA and Tukey's HSD tests.

Main Results:

• The highest SBS was observed in the Silane Ultradent + Single Bond 2 group (21.06 MPa), closely followed by the Scotchbond Universal Plus (SUP) group (19.43 MPa).
• No significant difference in SBS was found between the Silane Ultradent + Single Bond 2 and SUP groups.
• Failure mode analysis indicated a correlation between failure patterns and SBS results.

Conclusions:

• Scotchbond Universal Plus (SUP), a silane-containing universal adhesive, demonstrated high shear bond strength comparable to the separate application of silane.
• SUP presents a promising and potentially more convenient alternative for the repair of provisional restorative materials.