Secondary caries in dentine around composites: a wavelength-independent microradiographical study
| Autor: | Jan P. Arends, de Jacob Vries, Gehm Dijkman |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
DEMINERALIZATION
Materials science FLUORIDATING COMPOSITES Composite number Resin restorations Dentistry Dental Caries Composite Resins WAVELENGTH-INDEPENDENT MICRORADIOGRAPHY Fluorides stomatognathic system Recurrence Dentin medicine Animals Dental Restoration Permanent General Dentistry Tooth Demineralization INSITU INVITRO Minerals Enamel paint business.industry QUANTIFICATION Lesion depth LONGITUDINAL MICRORADIOGRAPHY Microradiography Resin Cements Demineralization Wavelength medicine.anatomical_structure visual_art PLACEMENT Dentin-Bonding Agents visual_art.visual_art_medium Secondary dentine MINERALIZED TISSUE-SLICES Cattle ENAMEL LOCATIONS business RESIN RESTORATIONS |
| Zdroj: | CARIES RESEARCH, 28(2), 87-93. KARGER |
| ISSN: | 0008-6568 |
| Popis: | Composite restorations are prone to develop secondary caries if a gap exists between tissue and restoration. The aim of this article was to quantify the effects of a fluoridating and non-F composite on secondary dentine caries in vitro as a function of time. The mineral loss in dentine was assessed in an artificial gap of 200 microns width at the composite/dentine interface; the samples were demineralised in a carboxymethylcellulose gel (pH = 5, 37 degrees C) for 8 weeks. Once a week the mineral content of the samples was determined using non-destructive wavelength-independent microradiography (WIM). After 8 weeks transversal microradiography (TMR) was done on the samples to investigate the mineral distribution of the dentine lesions. The WIM results show that the fluoride-releasing composite decreased the dentine demineralisation statistically significantly with respect of the non-F control by approximately 45%. The mineral loss values are found to be strictly proportional to time; the demineralisation reduction is expected to continue over extended periods of clinical relevance. The TMR results show that the fluoridating composite reduced the mineral loss values significantly with respect to the non-F control by approximately 55%, but had a negligible effect on the lesion depth values. This study indicates that WIM is an accurate and reliable technique to measure in vitro secondary dentine caries next to a composite restoration as a function of time. |
| Databáze: | OpenAIRE |
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