Biomedical subjects
Publications and source records attributed to W Niedermeier.
19 female patients suffering from incompatibility to their dentures with a suspected lack of estrogen were examined gynecologically, endocrinologically and cytologically. Substitution with conjugated estrogen caused in 14 patients improvement of general condition, in 12 persons reduction of symptoms in the oral cavity. Endocrinologically and cytologically no clear differences before and after treatment could be observed.
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Model studies of denture forms with group contact and front canine guidance showed that a procedure for the reconstruction of grinding surfaces not directly involved in movement guidance, based on the mean values, can be accurate. The standard measures of registration for transference to a semiadjustable articulator are adequate for satisfactorily reducing vertical deviations to a clinically tolerable minimum in reconstruction guide planes.
The effect of masticatory forces within and outside the stable stress-bearing areas of the complete upper denture on the pressure gradient and the flow of saliva into the space under the prosthesis were demonstrated with standardized tests. It was shown that masticatory stress within the stable area led to a continual increase in pressure in the space under the prosthesis. Masticatory force outside the stable area led to a decrease in pressure and an equalization of pressure in this space as well as dislocation and tilting of the complete denture. Due to masticatory force outside the stable area, the shape of the ridge influences the stability of the complete denture.
Parodontoplethysmography was repeatedly performed in seven patients with systemic sclerosis over a period of six years. The data obtained exactly correlated to improvement or deterioration in the patients' condition. Regular parodontoplethysmography is recommended in order to observe the course of the disease more objectively. Some of the examined patients roentgenographically showed a widening of the periodontal space, a typical feature of systemic sclerosis.
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A three dimensional adjustable supporting system is described which is useful in achieving a trouble-free mandibular position in asymmetrical myoarthropathies. The reproducible adjustment of the supporting point makes it possible to compare different favourable positions of the condyle with least expenditure of technique and time. The description is supplemented by a case report.
A lateral eccentric visualization of the temporo-mandibular joint is described using a new radiological arrangement. The exposures are made with the patient sitting and project the lateral aspect of the joint on to the picture plane, giving a symmetrical picture of the condyle, fossa mandibularis, tuberculum articulare and joint space. The exposure technique distinguishes itself by its simplicity and can be used in combination with every dental X-ray machine.
It is discussed whether psychological factors can be accounted responsible for the intolerance to the wearing of prostheses which can not be explained on dental grounds. Psychopathological, psychometric and psychopathometric investigations brought the following results: 1. Patients with complaints differ significantly from a control group in the variables changeable according to situation: "general somatic discomforts", disturbances of vegetative functions, and "depressive moods". This points to a constitutional predisposition to vegetative irritability and lowered threshold to frustration. 2. Less intelligent persons are less able and prepared to incorporate and accept the prosthesis. 3. Among the personality variables differences in the attributes "uncontrollability and social responsiveness" show up in sample tests. The subjects consider themselves more esteemed, popular and acknowledged. 4. In the majority of subjects the making of the tooth replacement coincided with stressful events.
The concentrations (geometric means of 11 determinations) of 9 trace metals in 17 anatomic regions of dog heart tissue and blood vessels were determined. The relationships recognized within the set of trace metal profiles were comparable to those reported earlier for the cardiovascular systems of pig [J. Mol. Cell Cardiol 6, 383 (1974)] and those of beef [Bioinorg, Chem. (in press)]. These included differences in trace metal concentrations that allowed differentiation of the following tissues from each other: (1) ordinary and specialized myocardium from blood vessels and heart valves, (2) blood vessels from heart valves and (3) arterial from venous tissues.
1. The dentist and staff are exposed to nearly double the risk of hepatitis than the population in general. The risk of infection rises with proved contact with hepatitis patients. 2. About 60% of dental personnel suffers subclinical infections. A subclinically infected person is a source of infection for his patients. 3. The chief source of infection is blood contact. In comparisons with the practitioner with mixed dental practice, the surgically active dentist is exposed to three or four times the infection risk. 4. Serological determination of hepatitis antibodies makes it possible to demonstrate subclinical infections. 5. Consistent prophylaxis against infection is required. After proved contact with a hepatitis patient, infection can be prevented by timely treatment with hyperimmune serum.
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Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.