Microscopic evaluation of dentin interface obtained with 10 contemporary self-etching systems: correlation with their...

Area of Science:

• Dental Materials Science
• Adhesive Dentistry
• Biomaterials

Background:

• Self-etch bonding systems are crucial in modern restorative dentistry.
• Understanding their micromorphological behavior at the tooth-adhesive interface is essential for clinical success.
• Variability in commercial systems necessitates comparative analysis.

Purpose of the Study:

• To investigate micromorphological differences among 10 commercial self-etch bonding systems.
• To evaluate the influence of primer pH on the performance of these adhesives.
• To compare the formation of the hybrid layer and interface characteristics.

Main Methods:

• Evaluation of 10 self-etch bonding systems on 100 human molars.
• Specimens analyzed using optical and scanning electron microscopy.
• Measurement of primer pH for each bonding system.
• Assessment of hybrid layer thickness, voids, and dentinal tubule sealing.

Main Results:

• Significant micromorphological differences were observed at the hybrid layer interface.
• Variations included hybrid layer thickness, presence of voids, and dentinal tubule sealing.
• Adhesive composition was identified as the primary factor influencing interface morphology.
• Primer pH did not significantly affect the performance of the self-etching adhesives.

Conclusions:

• The composition of self-etch bonding systems dictates their micromorphological outcomes.
• Primer pH is not a critical factor in determining the effectiveness of these adhesives.
• Clinicians should consider adhesive composition for optimal interface formation and longevity.