Comparison of Different Universal Adhesive Systems on Dentin Bond Strength

Area of Science:

• Dental Materials Science
• Adhesive Dentistry
• Biomaterials

Background:

• Adhesive dentistry has evolved, emphasizing minimal-invasive techniques and efficient enamel-dentine adhesives.
• Understanding the long-term performance of universal adhesives is crucial for modern conservative cavity designs.

Purpose of the Study:

• To evaluate the long-term dentin bond strength of universal adhesives.
• To compare the performance of G2-Bond Universal, Clearfil SE Bond, and Scotchbond Universal Plus.
• To identify a clinically effective universal adhesive with desirable bond strength.

Main Methods:

• Shear bond strength testing using the UltraTester machine.
• Evaluation of three universal adhesives: G2-Bond Universal, Clearfil SE Bond, and Scotchbond Universal Plus.
• Assessment after various storage and etching modes, including one-year oral environment simulation.

Main Results:

• Thermal cycling and adhesive system choice significantly impacted shear bond strength (p=0.018 and p=0.001).
• Scotchbond Universal Plus exhibited the lowest bond strength (mean 24.78 MPa).
• G2-Bond Universal showed desirable shear bond strength (mean 35.15 MPa), outperforming others after one year.

Conclusions:

• G2-Bond Universal is the most effective universal adhesive for clinical use, especially in self-etch mode.
• The HEMA-free formulation of G2-Bond Universal contributes to its robust long-term bonding performance.
• Findings support the use of G2-Bond Universal in minimal-invasive dentistry for durable restorations.