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An alternative method to reduce polymerization shrinkage in direct posterior composite restorations
Simone Deliperi1, David N Bardwell
1Tufts University School of Dental Medicine, Boston, USA. sdeliperi@hotmail.com
Journal of the American Dental Association (1939)
|October 31, 2002
Summary
New techniques for direct, posterior, resin-based composite restorations minimize polymerization shrinkage. These methods improve composite adaptation and longevity, reducing issues like recurrent caries and sensitivity.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
Background:
- Polymerization shrinkage remains a significant challenge in direct posterior resin-based composite restorations.
- Despite advancements in materials and techniques, controlling shrinkage is crucial for restoration longevity.
Observation:
- Proposed techniques treat enamel and dentin as distinct substrates.
- Utilizes flowable and microhybrid composites with specific polymerization methods (progressive and pulse curing).
- Employs an oblique, successive cusp buildup approach.
Findings:
- The described techniques significantly minimize polymerization shrinkage.
- Improved adaptation of resin composites to deep dentin is achieved.
- Reduced incidence of enamel microcracks observed.
Implications:
- Leads to more predictable and esthetic Class II restorations.
- Decreases marginal discoloration, recurrent caries, and postoperative sensitivity.
- Potentially enhances the long-term durability of dental restorations.