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A randomized controlled three year evaluation of "bulk-filled" posterior resin restorations based onstress decreasing resin technology
Umeå University, Faculty of Medicine, Department of Odontology, Dental Hygiene.
Univ Copenhagen, Fac Hlth Sci, Inst Odontol, DK-1168 Copenhagen, Denmark.
2014 (English)In: Dental Materials, ISSN 0109-5641, E-ISSN 1879-0097, Vol. 30, no 9, E245-E251 p.Article in journal (Refereed) Published
Abstract [en]

Objective. The objective of this randomized controlled prospective clinical trial was to evaluate the efficacy of a flowable resin composite (SDR) bulk fill technique in posterior restorations and to compare it intraindividually with a conventional 2 mm resin composite curing technique in a 3-year follow up. Materials and methods. Thirty-eight pairs Class II and 15 pairs Class I restorations were placed in 38 patients with a mean age of 55.3 years (range 32-87). Each patient received at random at least two, as similar as possible, Class II or Class I restorations of two restorative techniques. In all cavities a single step self-etch adhesive (Xeno V) was applied. In one of the cavities of each pair, a flowable resin composite (SDR) was placed, in bulk increments up to 4 mm as needed to fill the cavity 2 mm short of the occlusal cavosurface. The occlusal part was completed with a nano-hybrid resin composite (Ceram X mono) layer. In the second cavity, the hybrid resin composite was placed in 2 mm increments. The restorations were evaluated using slightly modified USPHS criteria at baseline and then yearly during 3 years. Caries risk and parafunctional habits of the participants were estimated. Results. After three years, 76 Class II and 28 Class I restorations could be observed. One molar resin composite-only tooth showed post-operative sensitivity during 3 weeks for temperature changes and occlusal forces. Two failed Class II molar restorations in the resin composite-only group were observed during the first year, one cusp fracture and one resin composite fracture. An annual failure rate of 1.3% was found for the resin composite only restorations and of 0% in the bulk-filled restorations (n.s.). Ten participants were estimated as having high caries risk and eleven showed active bruxing habits. Significance. The 4 mm bulk-fill technique with the flowable resin composite SDR showed highly clinical effectiveness, which was comparable during the 3-year follow-up with the 2 mm resin composite layering technique. 

Place, publisher, year, edition, pages
2014. Vol. 30, no 9, E245-E251 p.
Keyword [en]
Adhesive, Bulk fill, Clinical, Resin composite, Self etch
National Category
Dentistry
Identifiers
URN: urn:nbn:se:umu:diva-93469DOI: 10.1016/j.dental.2014.05.028ISI: 000340840000003OAI: oai:DiVA.org:umu-93469DiVA: diva2:784835
Available from: 2015-01-30 Created: 2014-09-23 Last updated: 2017-12-05Bibliographically approved

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