[Effect of the shape of the cavity and the sealant system on the adaptive quality of the proximal anterior filling margins].
The influence of different cavity preparation and the use of a low viscosity sealant on the marginal adaptation and microleakage of class III composite restorations was investigated in a dye penetration and a SEM-study in vivo. In 9 subjects with 4 restorations each, different forms of dentin cavities and enamel preparations were performed. In 3 out of 4 cavity types a low viscosity sealant was applied prior to the insertion of the composite material. Replicas of the restorations after 30 min, 15 and 120 days were examined by SEM (magnification 400X). Marginal areas 1 h, 15 and 120 days after restoration placement were coated with a fluorescent permeating dye, flushed with water, dried and photographed under UV-light. The micromorphological and in vivo permeation investigations have demonstrated that restorations with no marginal leakage and with perfect marginal adaptation could be achieved when using a sealant composite system with a new cavity design, the "adhesive preparation". Furthermore the retentive strength of the "adhesive restoration" which has no macroscopic dentinal retention was largely sufficient.
D000134:Acid Etching, Dental; D003731:Dental Caries / Q000473:pathology* / Q000628:therapy; D003737:Dental Cavity Preparation / Q000379:methods; D003764:Dental Materials; D003793:Dental Restoration, Permanent; D006801:Humans; D007180:Incisor; D008437:Maxilla
D003764:Dental Materials
L'influence de la forme de la cavité et du système de "sealant" sur la qualité de l'adaptation des joints marginaux d'obturations proximales antérieures.