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Radiopacity and Porosity of Bulk-fill and Conventional Composite Posterior Restorations-Digital X-ray Analysis
Operative Dentistry
|October 5, 2017
Summary
Bulk-fill composite resins show good radiodensity and fewer voids than incremental filling techniques for large cavities. This suggests bulk-fill materials may offer improved restoration quality.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Biomaterials
Background:
- Restoring large (mesio-occlusal-distal) cavities presents challenges in achieving optimal material adaptation and minimizing voids.
- Bulk-fill composite resins were developed to simplify the placement procedure compared to traditional incremental techniques.
Purpose of the Study:
- To compare the radiopacity and porosity (void presence) of dental restorations created using bulk-fill versus incremental filling techniques for large MOD cavities.
Main Methods:
- Fifty-five molars with MOD preparations were restored using either incremental or bulk-fill composite resins.
- Digital radiography was used to assess radiodensity and analyze void presence at the gingival and isthmus floors.
- Statistical analysis included ANOVA and chi-squared tests.
Main Results:
- Bulk-fill composites Tetric EvoCeram Bulk Fill (TEC) and Venus Bulk Fill/Charisma Diamond (VBF/CHA) exhibited significantly higher radiodensities.
- The lowest incidence of voids was observed with VBF/CHA, while the incremental technique showed the highest void rate.
- Radiodensity was generally higher in cervical regions compared to the isthmus floor.
Conclusions:
- Bulk-fill composite resins offer adequate radiodensity and a lower prevalence of voids compared to the incremental filling technique.
- These findings suggest bulk-fill materials may be a favorable option for restoring large cavities.
