Zahn-, Mund-, und Kieferheilkunde mit Zentralblatt最新文献

The zinc content in dental plaque after mouth rinsing with 0.2% zinc chloride solution is dependent on previous mouth rinsing with different pH value. Zinc retention is strongly reduced by rinsing with citric acid solution (pH value 1.0). Zinc retention is growing with increasing pH value when rinsing was made with sodium citrate buffer solution with increasing pH value. A rinsing with sodium citrate buffer solution (pH value 6.3) following a 0.2% zinc chloride solution leads to a drastic reduction of the zinc content. However, a chlorhexidine solution with the same pH value leaves no washing out effect.

The quantitative behaviour of Streptococcus mutans, Streptococcus sanguis and Streptococcus salivarius has been examined in initial findings and after application of 0.4% zinc chloride solution. After a 7 day rinsing the number of colony developing units of the species Streptococcus mutans and Streptococcus sanguis in the plaque decreased to about 30% of the determined initial values. The proportions of the species Streptococcus mutans and Streptococcus sanguis in the total streptococcus flora of the dental plaque were not changed by zinc chloride solution. The percentage of the Streptococcus salivarius increased significantly from 1% to 4% of the total number of streptococci.

In a dental-psychological investigation 100 young adults, aged 18-25, characterized by different courses of education, were subject to a standardized interview, action oriented diagnostics and dental examination. Knowledge, behaviour as well as state of oral health were different and in all did not come up to our expectations; but there were some correlations. It is indicated to optimize knowledge, behaviour and state of oral health by means of individual and collective measures taking educational specifics into consideration.

A similar plaque inhibition by was found after daily topical application of CHX or AmF/SnF2 in comparison with a placebo on rats. The fluoride combination exhibited a significant caries protective influence which was equal to AmF when the last was used in the same concentration. More concentrated AmF has shown a higher caries reducing effect and higher fluoride accumulation in the enamel surface layer of teeth. AmF/SnF2 could been recommended to individual plaque control with parallel caries protective effect.

Using x-ray spectroscopy the inorganic contents of the interface tooth restoration of conventional and gamma-2-reduced amalgam fillings were analysed after short and long clinical application. Qualitative difference did not exist between interface layer of both amalgam types. The amalgam elements mercury, silver and copper were not detected, but tin occurred everywhere. Zinc and oxygen were frequently analysed in the interface layer. Calcium, phosphorus, sodium and magnesium were detected, too.

On the base of gathered experiences the advantages and disadvantages of controlled clinical trials are discussed. In spite of the considerable expenditure of time and work the application of such investigations are recommended.

Three disinfectant sprays (Arugeen, Desident and Fesia-sept) proved to be very efficient against pure cultures of aero bacteria species, Cand. albicans, saliva flora and entero- and influenza viruses. The methods included carrier experiments using denture basis resins, fragments of orthodontic appliances and screws (instead of instruments).

Selected subjective and objective test methods for the assessment of the voice and speech function are presented. Special attention is drawn to sonography as an important objective method at present. Examples of electroacoustic examination methods complete the test possibilities.