[Electron probe microanalysis of fluorine content in deciduous and permanent teeth from an area with a fluoride-deficient (0,3% mg/I) water supply].

The content of fluorine in deciduous and permanent teeth of young people was determined by x-ray microanalysis. The purpose of this investigation was to determine the concentrations of F in teeth without any supplementation of fluorides and to elaborate basic dates as a standard of comparison. F was measured in microvolumes with a wavelength-dispersive spectrometer (Step-Scan 100 sec) after coating with about 300 A of Carbon.

[Maturation of enamel and tooth eruption].

The tertiary maturation of the erupting tooth needs much more time than it is supposed in literature. Possibly the completion is in accord with the decline of the caries activity at the end of the second decade of lifetime. With the aid of polarizing microscopy, electron microprobe, microhardness testing (Vickers) and scanning electron microscopy different stages of posteruptive maturation from human and other mammalian teeth were analysed.

[Experiences with gamma-2-free amalgam].

Within a clinical examination the Gamma-2-containing Amalgam "Dentargam", the Gamma-2-reduced "Germadent" and the Gamma-2-free alloy "Duragam" are tested by an intraoral comparison of tooth-paars. A superiority of the alloys with reduced Gamma-2-phases was found.

[Clinical studies of the proper indication of inlay and crown therapy in lateral tooth areas].

187 students were examined an epidemiological study for their dental conditions and requirements with respect to preservation and prosthetics. The persons tested showed a DMF-T index of 11.6 and a DMF-S index of 24.

[Possibilities of root canal filling with gutta-percha. A critical investigation of different techniques].

92 root canal fillings were performed using single guttapercha point with sealer (chloropercha) and lateral condensation of gutta-percha. Neither with single point nor with lateral condensation methods it is possible to achieve advantages in clinical or radiographic success. Nevertheless, the lateral condensation of gutta-percha is a suitable method for beginners to learn the complicated technique of root canal obturation.