Microleakage of five dentinal adhesives

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Adhesive Dentistry

Background:

• Microleakage is a critical factor in the longevity of dental restorations.
• Dentin adhesives play a crucial role in preventing marginal leakage.
• Understanding the comparative performance of different dentin adhesives is essential for clinical success.

Purpose of the Study:

• To compare the microleakage of four contemporary dentinal adhesives.
• To evaluate the efficacy of these adhesives against a control material (Scotchbond 2).
• To correlate microleakage results with previously reported bond strengths.

Main Methods:

• A matched pair design using 100 human molar teeth.
• Application of four test adhesives and a Scotchbond 2 control.
• Exposure to 500 thermocycles (5-55°C).
• Assessment of AGNO3 dye penetration via stereomicroscopy.

Main Results:

• Mean microleakage values (microns): Scotchbond Multipurpose (498.0), All-Bond 2 (530.8), Syntac (748.0), X-R Bond (844.9), Scotchbond 2 control (1095.2).
• Scotchbond Multipurpose, All-Bond 2, and Syntac demonstrated significantly lower microleakage than the control (P=0.0001).
• X-R Bond showed no significant difference in microleakage compared to the control (P=0.4634).

Conclusions:

• Scotchbond Multipurpose, All-Bond 2, and Syntac exhibit superior microleakage resistance compared to Scotchbond 2.
• X-R Bond's performance in microleakage is comparable to the control.
• These findings provide valuable insights into the clinical performance and reliability of tested dentin adhesives.