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Biomedical subjects

K Fuhr

Publications and source records attributed to K Fuhr.

At least 19 recordsLinked to original sources
PubMed1995

Studies on adaptation to complete dentures. Part II: Oral stereognosis and tactile sensibility.

High oral perception is thought to contribute to poor adaptation to new dentures. The aim of this study was to evaluate the oral stereognosis and tactile sensibility in edentate subjects and relate these to patient age and capability of adaptation to new prostheses. A total of 67 patients were provided with new complete dentures 2-3 weeks before the experiment. In 54 subjects, the oral stereognosis was evaluated by 12 different test-pieces, which were placed unseen on the tongue and had to be recognized. In 38 patients, the oral tactile sensibility was determined in the premolar area using copper foils. The capability of adaptation was evaluated by a questionnaire. Denture retention was assessed by clinical examination. The number of correctly identified test-pieces and the average identification time were related to the age, but no relation was found to patients' capability of adaptation. The tactile sensibility was found to be impaired with age and diminished capability of adaptation. Both adaptation and oral tactile sensibility were significantly lower in subjects with poor lower-denture retention. In conclusion, the results cannot support a relationship between high oral stereognosis and adaptation problems. However, good denture retention facilitates the adaptation process.

Adaptation, Psychological↗
PubMed1994

Age-related satisfaction with complete dentures, desire for improvement and attitudes to implant treatment.

In the edentulous lower jaw implant stabilised dentures have proved clinically so successful that the indication for this treatment is now being discussed more often with geriatric patients. The aim of this study of edentate subjects was to determine the age-relation of the demand for denture improvement, the risks and feasibility of implant treatment. Sixty four complete denture wearers aged from 42 to 84 years took part in the study. A questionnaire was used to determine the subjective demand for denture improvement. For 33 subjects implants seemed possible. For these patients fear and scepticism concerning implant treatment were specified and quantified. Impaired general health was the most frequent absolute contra-indication for implants; the local oral prerequisites tended to be slightly less favourable in elderly. Older patients were more satisfied with poorly fitting dentures and were less prepared to take trouble to achieve denture improvement. Although scepticism concerning implant treatment was not age-related, patients who were keen for an improvement of their dentures were significantly younger and less sceptical about implants.

Adaptation, Psychological↗
PubMed1989

[Problems in disinfection of dental impression materials].

In view of the risk of infection of the dentist and his staff in the dental surgery and dental laboratory and also of the patient with regard to hepatitis B and potentially also of AIDS, interruption of possible chains of infection by means of specific disinfection measures is to be demanded. Whereas appropriate hygiene concepts exist for disinfection of instruments, surfaces of equipment and furniture with regard to selection and application of various methods which may be considered, there are still extensive deficits for the domain of impression materials and their possible decontamination. In this regard, dentists frequently lack information with an adequate scientific basis that is understandable and oriented to practical requirements. Owing to the diversity of materials and their different behavior (cf. Tab. 1), appropriate recommendations can only be made on the basis of extensive studies. We assume that a practically relevant procedure must meet the following requirements: 1) sufficiently high rates of bacterial reduction in accordance with the guidelines of the DGHM, 2) lack of alterations in the dimensions or surfaces of the materials, 3) universal applicability, 4) practicability within a time period which is acceptable for smooth operation of the practice, 5) can be employed without problems for the staff. The object of the report are bacteriological results and materials testing data for the application of various methods of disinfection to selected impression materials. To summarize, it can be stated with regard to the bacteriological results that disinfection of impression materials is possible with fulfillment of the criteria specified above, but that there is a pronounced dependence of the results on the product formulation of the disinfectant and also of the impression material (cf. Fig. 4 and 5). Investigations of the material-related effects of the disinfection measures showed that extrapolation of the findings from one group of materials to another is also not possible in this connection, and that moreover the materials used to produce the model must also be included besides the impression materials used (cf. Fig. 9). Accordingly, statements on the suitability of a disinfection procedure are present admissible at most for the respective combination of materials tested, which makes practical introduction problematical.

Bacteria↗
PubMed1989

[Recording pattern of occlusal indicators. I. Influence of indicator thickness, pressure, and surface morphology].

There are no data in the literature about the recording pattern of occlusal indicators and the relevant methods. We therefore studied the recording patterns of four foils, six paper materials, and four silk qualities at different pressures and surface morphologies. Foils are the thinnest indicator materials and give more accurate readings than paper and silk. However, under smaller loads their marking capacity is worse. This means that higher pressures must be applied for the clinical use of foils. The drawbacks of the more intensively marking papers and silk are their greater thickness and less flexible base material. This leads to a greater number of pseudo contact markings.

Dental Instruments↗
PubMed1989

[Computer tomography of the TMJ versus clinical and instrumental analysis of function].

Data obtained by computer tomography of the TMJ were compared with those of clinical and instrumental analyses of function. 25 females and 37 males aged between 19 and 47 years (mean age, 24.8 years) were examined. None of the patients complained of functional problems subjectively, but clinical analysis of function showed several signs of stomatognathic dysfunction to be present. Results of CT did not correlate with those of clinical and instrumental analysis.

Adolescent↗
PubMed1989

[Recording occlusal indicators. Introduction to occlusal surface materials and roughness].

The quality of 4 foils, 6 papers and 4 tapes being used for marking occlusal contacts are examined. The influence of surface material and the roughness of surfaces are demonstrated. Indicators on plastics colour best, those on ceramics worst. As a rule unpolished surfaces show better results than those being extremely polished. Foils are the most exact markers. But they are less apt for smooth surfaces of ceramics and amalgam as well as for the rough surface of gold-alloys. In those cases thin articulating papers have preference.

Bite Force↗
PubMed1979

[Does traumatic occlusion change the jaw relations?].

Jaw relations were established via squashbites, and the deviations from habitual intercuspidation were measured. The evaluation of 252 squashbites indicated that 1. The mandible deviated as a result of the squashbite. The deviations are not related to the side and almost always lead to an increase in vertical jaw relations. 2. Primarily lateral deviations of the mandible are observed with unilateral squashbites. 3. Simultaneous bilateral squashbites, on the other hand, lead to left as well as right lateral deviation of the mandible. 4. The absolute values of the deviations in the sagittal direction are lowest in the middle; those directed ventrally are slightly more predominant. 5. Compared with materials containing siloxane, squashbites with plaster casts revealed no significant alterations in the qualitative deviations. 6. In terms of direction and extent, deviations of the mandible (primarily sagittal) depend on occlusal factors.

Adult↗