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Biomedical subjects

F Schmidli

Publications and source records attributed to F Schmidli.

At least 19 recordsLinked to original sources
PubMed1992

[New procedures for resin-metal bonds. A comparative in-vitro study].

Since 1984 it has been possible to create a chemical bond between dental alloys and composite resins resembling the metallo-ceramic bond. Modern systems based on silanization (Rocatec, Silicoater MD, and Spectralink), in connection with the specific resins used in these systems (VisioGem, Dentacolor, and SR-Isosit-N), were tested for their bond strength to 9 common dental alloys (of 7 different types) with regard to shear strength, the topography of the fracture surfaces, and metallographic microstructure transformations. No major structural transformations were observed for any of the systems tested. A notable degree of interdependence was seen in the Silicoater MD system whose bond strength to non-precious alloys (among others) was the lowest in the test. The Rocatec system, on the other hand, showed a superior bond to all types of alloys, especially to pure titanium.

Composite Resins↗
PubMed1991

[On the clinical relevance of the dimensional behavior of silver amalgam. A comparative in vitro and in vivo study].

The clinical relevance of the dimensional behavior of six different gamma-2-free silver amalgam products was examined in comparative in vitro and in vivo trials. Dye penetration tests, roughness measurements, and inspection of the marginal fit using a scanner electron microscope all showed that the results of the in vivo and the in vitro trials were in good agreement and that there was no significant difference between the various products tested, despite the fact that they differed both in morphology and in composition. Copalite exerts a favorable influence on the marginal fit of amalgam restorations, not only in laboratory trials, but also clinically. The results obtained show that the behavior of an amalgam with respect to changes in volume is not the sole criterion by which its quality is to be judged. Amalgams with a pronounced contraction tendency will seal the marginal gap with their corrosion products (SnCl). Here copalite serves as a temporary stand-in. There was no leakage of metal ions from the restoration into the dentin for any of the products tested, including those with a high copper content.

Adult↗