Split-increment technique: an alternative approach for large cervical composite resin restorations.

Area of Science:

• Restorative Dentistry
• Dental Materials Science

Background:

• Large cervical carious lesions extending onto the root surface present significant restorative challenges.
• Minimizing polymerization shrinkage stress is crucial for the longevity of composite resin restorations.

Purpose of the Study:

• To introduce and describe the split-increment technique as an alternative method for placing composite resin.
• To address the challenges associated with restoring large cervical carious lesions.

Main Methods:

• The split-increment technique involves using two 1.5 mm thick composite resin increments.
• Diagonal cuts are made in each increment before light-curing to create four triangular portions.
• Incremental placement strategically covers axial and surrounding walls, followed by a final increment to seal margins.

Main Results:

• The technique effectively reduces the C-factor and associated polymerization shrinkage stresses.
• Shrinkage is directed towards unbonded areas created by the cuts, minimizing stress on cavity walls.
• The method allows for the insertion of uniform thickness increments, mimicking natural tooth structure.

Conclusions:

• The split-increment technique is a viable alternative for restoring large cervical carious lesions.
• It offers improved control over shrinkage stress and enhances the aesthetic outcome.
• This approach contributes to more durable and natural-looking composite resin restorations.