After application of hydrogen peroxide into the root canal of extracted teeth of patients between the ages of 18 and 30 years the antiseptic could be detected on the root surface by means of iodometry and in tooth cross sections in dentine and cementum by means of staining reaction (benzidine-peroxidase solution). Out of the root canals which were apically not passable and coronally closed the first traces of the instilled 5% hydrogen peroxide appeared after 14 min 45 sec on the root surface. In the dentine a mean penetration depth of hydrogen peroxide up to 1.28 mm (apical root area), 1.45 mm (middle root third) and 1.95 mm (coronal root area) could be measured. Best results were obtained after rinsing/suction treatment of the root canal, especially in combination with low-frequency ultrasound.
In 32 patients with plaque associated gingivitis the effect of initial treatment for 2 respectively 4 weeks on the gingival index (GI) and the interleukin 1 (IL 1) content in the gingival sulcus fluid (SSF) was investigated. After successful clinical treatment a decrease of the IL 1 level was found. The importance of the IL 1 content of the gingival sulcus fluid as a sensitive parameter for therapy control is discussed.
The global pattern of caries prevalence has undergone some changes since the seventies. This has occurred with some remarkable geographic differences. Comparative statistical analysis shows an acceptable situation at the current moment for the population of the new "Bundesländer". The globally given goals of oral health for the various age groups can be reached or have already been accomplished in part. For the youth population the state of good oral health corresponds always to the caries protective availability of fluorides, for the adult population to the remarkable state of a tooth-preservative oriented curative care. For the senior citizen population the high loss of teeth is an indication of past neglect in dental care. Future development of oral health of the population depends largely on all-encompassing preventive and tooth-preservative concepts of dental care.
In 1987, 12 years after fluoridation of drinking water, caries prevalence of Prague school-children is very low, and the goals of WHO have already been reached and undercut. Children from Rostock, where no fluoridation of drinking water was introduced, have an unchanged high caries experience in 1985. Degree of treatment and percentage of successfully treated children show only little differences in both towns. These results emphasize the demand for an introduction and/or a continuation of an effective caries prevention in children once more.
25 patients with fibrous dysplasia have been treated surgically between 1980 and 1989. For monostotic manifestations which occurred mostly in the lower jaw, as well as for the follow up control, the conventional x-ray examination beneath anamnestic data was sufficient. Polyostotic extracranial lesions have mainly been diagnosed by scintigraphy. For exact statements about the extend and the involvement of functionally important structures, specially in the orbital and skull base region, CT proved to be the most effective diagnostic method by showing simultaneously bony and soft tissue structures. To our knowledge not yet described in the literature, we diagnosed a manifestation of several cervical vertebrae in one case.
