[Bonding and enamel prisms. Importance of cavity margin preparation for posterior composites].
Preparation of the cavo-surface margin for fillings with "composites resins" is an important operative step. The good peripheral fit of the restoration and the stability of the bond between tooth and material depend on that preparation. How should the "bevel" be shaped? Scan electron microscopy of long bevels and rounded bevels show that the former seem more favorable to the fit of the filling. The section of enamel prisms is clean. The aprismatic surface area disappears. This enables to etch the cristallites in a more favorable axis as opposed to the rounded bevel.
Nebot
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D
Goldberg
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Fortier
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JP
Aldin
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D003188:Composite Resins; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D003743:Dental Enamel / Q000648:ultrastructure*; D003763:Dental Leakage / Q000517:prevention & control; D006801:Humans; D008855:Microscopy, Electron, Scanning; D008963:Molar; D013499:Surface Properties
D003188:Composite Resins
Collage et prismes de l'émail. Importance de la préparation des bords des cavités pour composites postérieurs.