In vitro microleakage associated with posterior composite restorations used with different base/bonding system...

Area of Science:

• Restorative Dentistry
• Dental Materials Science

Background:

• Microleakage in Class II cavities is a significant clinical concern.
• Evaluating different restorative material and technique combinations is crucial for minimizing microleakage.

Purpose of the Study:

• To identify the optimal base/restoration combination for reducing microleakage in Class II cavities.
• To compare the microleakage of various restorative materials and techniques.

Main Methods:

• 100 premolar teeth underwent standardized Class II cavity preparation.
• Teeth were restored using ten different material/technique combinations.
• Dye penetration (eosin) was assessed using image analysis after sealing and sectioning.

Main Results:

• Light- and chemically-cured glass-ionomer restorations exhibited comparable, low microleakage.
• These glass-ionomer restorations showed significantly less leakage than etched and bonded cavities.
• Cavities without enamel etching or bonding systems displayed the highest microleakage.

Conclusions:

• Glass-ionomer-based restorations offer a promising solution for minimizing microleakage in Class II cavities.
• Enamel etching and bonding systems may not always be superior and can potentially increase leakage in certain contexts.
• Material and technique selection significantly impacts the sealing ability of Class II restorations.