title: Three-year performance of a calcium-, fluoride-, and hydroxyl-ions-releasing resin composite.
abstract: Secondary caries is the main reason for replacement of restorations in cross-sectional studies. To prevent demineralization, the use of ion-releasing materials has been suggested. The purpose of this study was to evaluate the durability of a new resin composite that releases calcium-, fluoride- and hydroxyl ions at low pH. Sixty-nine posterior restorations were placed in 36 patients and were evaluated at baseline, 6 months, 1, 2, and 3 years with slightly modified USPHS criteria. Postoperative sensitivity was observed in 2 teeth directly after placement and in another 8 teeth after 6-12 months. Absence of the use of an adhesive bonding technique explained the symptoms. A total of 26% failures was observed during the follow-up: 13 cusp fractures, 2 partial fractures of the resin composite, 1 secondary caries and 1 endodontic treatment due to prolonged sensitivity. The cusp fractures occurred during the second part of the follow-up and may be explained by expansion of the composite material due to water expansion and/or hydrolytic degradation of the alkaline glass filler. It can be concluded that the new ion-releasing resin composite showed, despite promising pH stabilizing properties, a clinically unacceptable failure rate.
authors.affiliation: Department of Odontology, Dental School, Umeå University, Sweden. Jan.van.Dijken@odont.umu.se
authors.forename: Jan W V
authors.initials: JW
authors.lastname: van Dijken
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002118:Calcium / Q000737:chemistry*; D002327:Cariostatic Agents / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D003731:Dental Caries / Q000209:etiology; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent; D003807:Dentin Sensitivity / Q000209:etiology; D017220:Dentin-Bonding Agents / Q000737:chemistry; D004058:Diffusion; D005260:Female; D005459:Fluorides / Q000737:chemistry*; D005500:Follow-Up Studies; D005898:Glass / Q000737:chemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D006878:Hydroxides / Q000737:chemistry*; D008297:Male; D008422:Materials Testing; D008875:Middle Aged; D012390:Root Canal Therapy; D013223:Statistics as Topic; D013499:Surface Properties; D014082:Tooth Fractures / Q000209:etiology; D014867:Water / Q000737:chemistry
chemical_list: D002327:Cariostatic Agents; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D006878:Hydroxides; D014867:Water; C031356:hydroxide ion; D005459:Fluorides; D002118:Calcium