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Posterior bulk-filled resin composite restorations: A 5-year randomized controlled clinical study.
Umeå University, Faculty of Medicine, Department of Odontology.
2016 (English)In: Journal of Dentistry, ISSN 0300-5712, E-ISSN 1879-176X, Vol. 51, 29-35 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVE: To evaluate in a randomized controlled study the 5-year clinical durability of a flowable resin composite bulk-fill technique in Class I and Class II restorations.

MATERIAL AND METHODS: 38 pairs Class I and 62 pairs Class II restorations were placed in 44 male and 42 female (mean age 52.4 years). Each patient received at least two, as similar as possible, extended Class I or Class II restorations. In all cavities, a 1-step self-etch adhesive (Xeno V+) was applied. Randomized, one of the cavities of each pair received the flowable bulk-filled resin composite (SDR), in increments up to 4mm as needed to fill the cavity 2mm short of the occlusal cavosurface. The occlusal part was completed with the nano-hybrid resin composite (Ceram X mono+). In the other cavity, the resin composite-only (Ceram X mono+) was placed in 2mm increments. The restorations were evaluated using slightly modified USPHS criteria at baseline and then yearly during 5 years. Caries risk and bruxing habits of the participants were estimated.

RESULTS: No post-operative sensitivity was reported. At 5-year 183, 68 Class I and 115 Class II, restorations were evaluated. Ten restorations failed (5.5%), all Class II, 4 SDR-CeramX mono+ and 6 CeramX mono+-only restorations. The main reasons for failure were tooth fracture (6) and secondary caries (4). The annual failure rate (AFR) for all restorations (Class I and II) was for the bulk-filled-1.1% and for the resin composite-only restorations 1.3% (p=0.12). For the Class II restorations, the AFR was 1.4% and 2.1%, respectively.

CONCLUSION: The stress decreasing flowable bulk-fill resin composite technique showed good durability during the 5-year follow-up.

CLINICAL SIGNIFICANCE: The use of a 4mm incremental technique with the flowable bulk-fill resin composite showed during the 5-year follow up slightly better, but not statistical significant, durability compared to the conventional 2mm layering technique in posterior resin composite restorations.

Place, publisher, year, edition, pages
2016. Vol. 51, 29-35 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:umu:diva-124775DOI: 10.1016/j.jdent.2016.05.008PubMedID: 27238052OAI: diva2:955012
Available from: 2016-08-24 Created: 2016-08-24 Last updated: 2016-08-24

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