Comparative study of composite resin placement: centripetal buildup versus incremental technique

Area of Science:

• Dental Materials Science
• Restorative Dentistry

Background:

• Class II composite restorations are prone to marginal leakage and degradation.
• Optimizing proximal restoration techniques and matrix systems is crucial for long-term clinical success.

Purpose of the Study:

• To evaluate the impact of two proximal restoration techniques and matrix systems on marginal seal and microhardness of Class II composite restorations.
• To determine the most effective combination for minimizing microleakage and maximizing composite surface hardness.

Main Methods:

• An in vitro study was conducted comparing different proximal restoration techniques and matrix systems.
• Marginal microleakage and composite surface microhardness were measured for Class II restorations.

Main Results:

• The combination of transparent matrices, reflective wedges, and the centripetal buildup technique resulted in the lowest microleakage in deep Class II restorations with enamel margins.
• This technique also yielded the highest surface hardness for the composite resin.
• Differences in microleakage were not statistically significant across all tested groups.

Conclusions:

• Transparent matrices and reflective wedges, when used with the centripetal buildup technique, appear to be a promising approach for improving the marginal seal and surface properties of Class II composite restorations.
• Further clinical studies are warranted to validate these in vitro findings.