[In-vitro research on the marginal adaptation of composites with the use of different dentin adhesives]. / In-vitro-Untersuchungen zur marginalen Adaptation von Komposits bei Anwendung verschiedener Dentinhaftmittel.

The aim of this investigation was the check and evaluation of 7 various dentin adhesives regarding their influence on the connection between dentin resp. enamel and composite filling. For that cylindrical cavities in dental crowns (enamel cavities) and roots (dentin cavities) were prepared and treated with dentin adhesives and composite materials. One part of the test teeth was subjected to loads storage in aqueous solution and thermocycling. The marginal adaptation of the composite filling was checked by means of the dye penetration test. The evaluation was made after cutting the teeth in the stereo microscope TECHNIVAL 2 (Carl Zeiss Jena) at 16-resp. 25 magnifications and defined criteria. The fillings in cavities bound by enamel exhibited a very good marginal adaptation of the composite. The location of the dentin cavity (crown or root dentin) had no significant influence on the fitting of the filling. A clear penetration of dye could be observed with the fillings in the dentin with and without adhesives, which considerably intensified after thermocycling. Best results with regard to the marginal adaptation were obtained with Scotchbond 2, Mirage-Bond and Cavex-Clearfil-Newbond. A restoration without a marginal gap was not possible.

[The effect of chlorhexidine on the pulp-dentin system (research on the canine dental pulp)]. / Der Einfluss von Chlorhexidin auf das Pulpa-Dentin-System (Untersuchungen an der Zahnpulpa des Hundes).

The effect on the pulp-dentin system by chlorhexidine 0.2% in comparison to the physiological sodium chloride solution was investigated in animal experiments. The methods of tests were based on the requirements of FDI 1980. After 3, 21, 70 and 90 days the teeth were extracted and prepared for histological studies. The evaluation of the histological preparations including measurement on the residual dentin layer was achieved by light microscopy. Differences in the pulp reaction after treatment of the teeth with chlorhexidine or sodium chloride solution could not be observed. The changes of pulp tissue were slight to moderate and depended on the residual dentin layer. The cavity cleaning with chlorhexidine 0.2% did not cause any additional damage in the pulp.

[Evaluation of amalgam filling and inlay in the therapy of lesions of the hard tissue in posterior teeth]. / Zum Stellenwert von Amlagamfüllung und Inlay bei der Therapie von Hartsubstanzdefekten im Seitenzahnbereich.

The importance of the therapy of premolars and molars with amalgam fillings and inlays in combination with preventive measures is described. By means of own results and the literature an estimation is given.