Effect of limonene associated with bioactive glass-ceramic on dentin/adhesive interface

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Adhesive Dentistry

Background:

• Universal adhesive systems are widely used in restorative dentistry.
• Dentin bonding is crucial for the longevity of dental restorations.
• Pretreatment strategies aim to enhance adhesion and reduce bond failures.

Purpose of the Study:

• To investigate the impact of limonene and biosilicate pretreatment on the bond strength of a universal adhesive to dentin.
• To evaluate the influence of these pretreatments on fracture patterns and interface integrity over time.
• To assess the effect of limonene and biosilicate on dentinal tubule patency and material degradation.

Main Methods:

• Human molars were pretreated with limonene (LIM), biosilicate (Bio), or both (LIMBio) before universal adhesive application.
• Microtensile bond strength tests were performed after 24 hours and 6 months of storage.
• Fracture analysis, observation of adhesive interfaces, and dry mass loss calculations were conducted.

Main Results:

• No significant differences in bond strength were observed between control and pretreated groups.
• Pretreatment with LIM and LIMBio resulted in more open dentinal tubules.
• Non-adhesive fractures were the predominant failure mode across all groups, even after 6 months.

Conclusions:

• Limonene and biosilicate pretreatments do not improve universal adhesive bond strength to dentin.
• These pretreatments may increase the incidence of non-adhesive fractures, potentially compromising restoration longevity.
• Further research is needed to understand the long-term effects and clinical implications of these pretreatments.