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Biomedical subjects

W Wiedemann

Publications and source records attributed to W Wiedemann.

10 recordsLinked to original sources
PubMed1979

[Comparative phorogrammetric studies on a periodontal index].

Reproducibile results are difficult to obtain with subjectively recorded periodontal indexes. The information acquired via such indexes therefore may be called into question. Inflammation of the gingiva was induced in 15 subjects. The degree of gingival swelling was determined via monophotogrammetry; the degree of inflammation, with the PMA index which emphasizes the symptom "swelling". The results were compared and discussed. It is highly probable that the PMA index is subjectively overrated.

Female↗
PubMed1979

[Comparative clinical and photogrammetric studies on the marginal periodontium after the use of dentifrices].

A suggestion was made for testing the therapeutic effect of certain substances on gingival inflammation. Gingivitis was induced in 60 subjects by discontinuing of all forms of oral hygiene. Three tooth pastes, one of which was a placebo, were used for the study. Regression of the inflammation was determined with the periodontal indexes and photogrammetry. Photogrammetry appears to be well suited for objective evaluation of the therapeutic value of certain substances.

Dental Plaque↗
PubMed1979

[The effect of periodontal resistance on experimental gingivitis].

The distribution and degree of severity of periodontal diseases depends on many different factors. One of the factors, periodontal resistance, was studied in 62 subjects. The test with experimental gingivitis showed that the dividing the subjects into periodontal-resistant and periodontal-insufficient groups led to more differentiated results.

Adult↗
PubMed1979

[Comparative studies of the hardness of dental calculus after the use of 2 dentifrices].

A method was described for recording the mechanical characteristics of tartar using objectively comparable test data. This method was used to study tartar which had formed when different tooth pastes were used. The results of this study indicate that 1. Tartar formed when different tooth pastes are used may exhibit different characteristics; 2. The dynamic measurement of indentation is suitable for quantitative determination of the mechanical characteristics of tartar. These mechanical characteristics have not been ascertainable until now.

Biomechanical Phenomena↗
PubMed1979

[Dental studies on the protective effect of breast feeding].

The frequency of disease for children who were breast fed as babies is lower than that for children who were bottle fed. Breast milk contains specific and nonspecific proteins which act against pathogens. The influence of breast milk on the development of juvenile periodontitis was examined. It was shown that, out of 55 children raised on bottle milk, 9 children up to 14 years of age showed inflammatory changes in the gingiva while only 1 child out of the 17 fed with breast milk during the first few months of life had gingivitis. The lower frequency of gingivitis can probably be explained by the immunopathology of periodontitis.

Breast Feeding↗
PubMed1978

[Photogrammetric studies on the degree of swelling in the inflamed gingiva].

A photographic method was described with which changes in the swelling of the gingiva can be objectively determined. During exposure of the film, the flash device projects vertical lines on the teeth and gingiva. These lines are photographed with a compact camera which the subject holds with his teeth over a separate occlusion template. Increased swelling of the gingiva was demonstrated in eight subjects during an observation period of 21 days in which no oral hygiene was carried out.

Gingivitis↗
PubMed1978

[Experimental gingivitis--a photogrammetric comparative study].

Inflammation of the gingiva was induced in 29 subjects ranging in age from 20 to 29 by discontinuing all forms of oral hygiene for three weeks. The course of the inflammation was followed during the developmental period and the following therapy phase with the PMA index, the plaque index, and monophotogrammetry. The results tend to indicate that gingival swelling develops more gradually and recedes more rapidly after treatment has been instituted than could be assumed from the current standard periodontal indexes.

Adult↗