Microleakage of three resin placement techniques

Area of Science:

• Dental Materials Science
• Restorative Dentistry
• Biomaterials Engineering

Background:

• Microleakage is a significant clinical challenge in composite resin restorations.
• Understanding factors influencing marginal integrity is crucial for long-term restoration success.
• Class V preparations near the cemento-enamel junction are prone to leakage.

Purpose of the Study:

• To compare microleakage associated with three composite resin placement techniques.
• To evaluate the influence of four adhesive bonding agents on marginal seal.
• To determine the most effective technique for minimizing dye penetration in Class V cavities.

Main Methods:

• Class V preparations on extracted human molars were restored using three composite resin techniques and four adhesive agents.
• Restored teeth underwent 24-hour water storage followed by 100 thermal cycles.
• Marginal microleakage was quantified by measuring linear dye penetration.

Main Results:

• The incremental placement technique significantly minimized dye penetration.
• Specific adhesive bonding agents may influence the degree of microleakage.
• The described incremental technique showed superior marginal seal compared to other methods tested.

Conclusions:

• An incremental composite resin placement strategy is effective in reducing microleakage in Class V restorations.
• Careful technique selection is vital for achieving a durable marginal seal in composite fillings.
• Further research should explore optimal bonding agent and placement technique combinations.