The effect on marginal leakage when using two dentine adhesives in combination

Area of Science:

• Dental Materials Science
• Adhesive Dentistry

Background:

• Dentine adhesives are crucial for durable composite restorations.
• Marginal gaps in restorations can lead to secondary caries and failure.
• Current adhesives have limitations in achieving complete marginal integrity.

Purpose of the Study:

• To evaluate the combined efficacy of two dentine adhesives with complementary bonding mechanisms.
• To determine if combining adhesives improves gap-free margins in composite restorations.
• To assess the reduction of marginal contraction gaps.

Main Methods:

• Utilized two dentine adhesives: one targeting calcium ions, the other organic dentine components.
• Applied the adhesives in combination to create composite restorations.
• Evaluated the marginal integrity and presence of gap-free margins post-restoration.

Main Results:

• An increased number of restorations exhibited gap-free margins compared to single-adhesive applications.
• Marginal contraction gaps were not completely eliminated despite the combined adhesive approach.
• The complementary action of the adhesives showed partial success in improving marginal seal.

Conclusions:

• Combining dentine adhesives with different bonding strategies offers a potential improvement in marginal seal.
• Further research is needed to fully eliminate marginal contraction gaps in composite restorations.
• Optimizing adhesive combinations may enhance the longevity and success of dental restorations.