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Biomedical subjects

R L Macchi

Publications and source records attributed to R L Macchi.

At least 37 records · Page 2Linked to original sources
PubMed1977

Enamel surface treated with zinc polyacrylate dental cement.

The surface of tooth enamel that had been left in touch with the liquid or the mix of a zinc polyacrylate dental cement was studied by scanning electron microscopy. Both treatments produced lesions on the enamel and were represented by unevenly distributed microcavities of varying extension. Topically applied SnF2 did not modify the aspect of the treated surface.

Acid Etching, Dental↗
PubMed1974

[Composites].

Explore the source record for details and available documents.

Composite Resins↗
PubMedDate not supplied

Enamel corrosion produced by zinc phosphate dental cement.

The application of a phosphoric acid solution or of a zinc phosphate cement mix on enamel surface causes alteration of its structure. The lesions of the enamel are cavities of irregular shapes that might retain debris. In view of the high solubility of disintegration of the cement, those cavities can be considered potential sites of plaque installation and initiation of carious processes.

Corrosion↗
PubMedDate not supplied

Antimicrobial power of composite resin adhesion systems.

The adherence of microorganisms to dentin that had been contaminated and then treated with conditioning substances was evaluated. The germicide effect of those products and their possible substantivity was also evaluated. Dentin slices were contaminated with Candida albicans, Streptococcus mutans and Actinomyces naeslundii and then treated with the following substances: 1. Experimental Blue Solution A, 2. Experimental Red Solution B; 3 Tubulicid Blue Label; 4. Tubulicid Red Label; 5 Scotchprep Dentin Primer; 6 ventura Dentin Bond Cleaner; 7 ventura Dentin Bond Primer, 8. Gluma dentin Bond; 9 Tenure Conditioner; 10. All Bond Dentin Conditioner; 11 Syntac Primer; 12. Clearfil New Bond acid + adhesive; 13 Prisma Universal Bond 3 Primer; 14. Denthesive Cleaner; 15. Control (Distilled water). Adherence was evaluated using scanning electron microscopy and viability tests were performed. Substances 1, 2, 3, 4, 5, 7, 8, and 11 impair adherence; the control and substances 6 and 9 produced no afforded intermediate results effect while substances 10, 12, 13 and 14. Viability tests afforded results similar to those obtained for adherence. Several substances that are used for dentin treatment or for dentin priming for adhesion could be useful in preventing microorganism viability and so contribute to the protection of pulp vitality.

Actinomyces↗