Back to the multi-step adhesive system: A next-generation two-step system with hydrophobic bonding agent improves...

Area of Science:

• Dental Materials Science
• Adhesive Dentistry
• Biomaterials Engineering

Background:

• Dental bonding agents are crucial for restorative procedures.
• Hydrophobic properties in bonding materials may enhance durability.
• Evaluating novel hydrophobic bonding systems is essential for improving clinical outcomes.

Purpose of the Study:

• To assess the bonding effectiveness of a new two-step hydrophobic bonding material (BZF-29).
• To compare the microtensile bond strength (µTBS) and failure modes of BZF-29 against established one-step and two-step bonding systems.
• To determine the long-term stability of the hydrophobic bonding system.

Main Methods:

• Microtensile bond strength (µTBS) testing was performed on three groups: BZF-29, G-Premio Bond (one-step), and CLEARFIL SE Bond 2 (two-step).
• Samples were aged in water for 24 hours, 3 months, and 6 months (n=25 per group).
• Fracture surfaces were analyzed using scanning electron microscopy (SEM) to characterize failure patterns.

Main Results:

• The BZF-29 group exhibited significantly higher µTBS than the GPB and SE2 groups (p<0.001).
• Dominant failure modes for BZF-29 were cohesive (48-84%), while GPB showed interface failure (48-52%) and SE2 showed mixed failure (48-60%).
• The hydrophobic nature of BZF-29 correlated with improved long-term bonding performance.

Conclusions:

• The novel two-step hydrophobic bonding material, BZF-29, offers superior long-term bonding effectiveness.
• Its hydrophobic characteristic contributes to enhanced durability and reduced interface failure.
• BZF-29 presents a promising advancement in dental adhesive technology for improved restorative longevity.