[Diagnosis of dental caries based on intra-oral roentgenograms].

On 238 intra-oral roentgenograms there were assessed carious process, shape, size, extent and depth of defects as well as the possibility of complications in teeth which were not treated. There were assessed 277 defects, out of which 194 in upper teeth and 83 in lower ones. In all the teeth of the maxilla and of the mandible there was found the greatest number of amorphic defects and semilunar contact surfaces.

[Enzymatic tests for alkaline and acid phosphatase in gingival tissues in workers of the Chelm Cement Plant].

Using histochemical methods the activity of alkaline and acid phosphatase was determined in the gingivae of 38 workers aged from 26 to 59 years employed in work with greatest exposure to dust. The control group comprised 11 men aged 23 to 49 years living in Chelm or in its vicinity, not exposed to cement dust. The activity of alkaline phosphatase in the group with exposure and with deep gingivitis of lower intensity was very high, while it was lower in the group with highest intensity of the inflammatory process.

[Localization of retained teeth in radiogram].

The purpose of the study was evaluation of various possibilities of localization of retained teeth. The study was carried out on 86 patients referred to the Department of Conservative Stomatology, Institute of Stomatology Medical Academy in Lublin. Retained teeth were discovered in them accidentally or in examinations for various symptoms.

[Clinical evaluation of metronidazole in the treatment of the periodontal abscesses].

On the basis of clinical examination it has been found that Metronidazole which was applied in 24 patients suffering from periodontal abscesses produced healing effects, lessened their pain and did not cause any side reactions. The values of PI (Russell rate) were considerably lower after the treatment comparing to the initial state, which confirms the therapeutic effectiveness of the drug.

[The importance of trace elements in the aetiology of dental caries].

Data reported in the literature on the role of trace elements in the aetiology of dental caries are reviewed. The study of these elements--apart from fluorine--whose anticarietic or carietogenic effects have not yet been established, may shed new light on the carietic process and may contribute to a better knowledge of its cause.