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Posterior bulk-filled resin composite restorations: A 5-year randomized controlled clinical study
Jan W V van Dijken1, Ulla Pallesen2
1Dental School, Faculty of Medicine, Umeå University, Umeå, Sweden.
Journal of Dentistry
|May 31, 2016
Summary
The flowable bulk-fill resin composite technique demonstrated good 5-year clinical durability for posterior dental restorations. This bulk-fill method showed comparable longevity to conventional layering techniques, with similar annual failure rates.
Area of Science:
- Restorative Dentistry
- Dental Materials Science
- Clinical Trials
Background:
- Bulk-fill resin composites offer potential advantages in reducing placement time for posterior restorations.
- Evaluating the long-term clinical performance of these materials is crucial for widespread adoption.
Purpose of the Study:
- To assess the 5-year clinical durability of a flowable resin composite bulk-fill technique compared to a conventional layering technique in Class I and Class II restorations.
Main Methods:
- A randomized controlled study involving 100 pairs of Class I and Class II restorations.
- One restoration in each pair used a 4mm flowable bulk-fill technique (SDR) with a nano-hybrid overlay (Ceram X mono+).
- The control restoration used a conventional 2mm layering technique with nano-hybrid composite (Ceram X mono+). Restorations were evaluated annually using USPHS criteria.
Main Results:
- No post-operative sensitivity was reported.
- Ten restorations (5.5%) failed within 5 years, primarily due to tooth fracture or secondary caries. Failures occurred in both groups.
- The annual failure rate for bulk-fill restorations was 1.1% versus 1.3% for conventional restorations (p=0.12).
Conclusions:
- The stress-decreasing flowable bulk-fill resin composite technique exhibits good 5-year clinical durability.
- The 4mm bulk-fill technique showed slightly better, though not statistically significant, durability compared to the conventional 2mm layering technique.
