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Biomedical subjects

W Schulte

Publications and source records attributed to W Schulte.

At least 127 records · Page 7Linked to original sources
PubMed1980

[On the reaction of finger pulse amplitude to noise (author's transl)].

1. Forty-three (30 male and 13 female) subjects were exposed to traffic noise of ca. 72dB. Their reactions concerning blood pressure, pulse pressure, finger pulse amplitude and radialis pulse amplitude, heart rate, breathing rate, and integrated EMG were analyzed. 2. Each of the circulatory parameters exhibited significant reactions in either direction in more than 40% of the subjects. The vasoconstrictive reaction in finger pulse amplitude was most outstanding. Moreover, pulse pressure, radioalis pulse amplitude and, heart rate also tended to decrease whereas diastolic blood pressure tended to increase. Breathing rate and EMG remained mainly unchanged. 3. Owing to the different direction of reactions the mean values of a sample can yield possible misleading information. Furthermore, it is suggested that the reaction of finger pulse amplitude should be related to the standard deviation of the prestimulus resting period instead of to the mean value of this period. 4. Male subjects react with a stronger decrease of heart rate than female subjects. Male subjects with higher diastolic casual blood pressure and heart rate values exhibit stronger decreases in finger pulse amplitude and heart rate. Older male subjects tend to react with an increase of heart rate. 5. Within the male subjects, the reaction of finger pulse amplitude correlated positively with the reactions of pulse pressure and heart rate, but not with the reaction of radialis pulse amplitude. The attempt to distinguish between vasoactive and pressure-dependent components in finger pulse amplitude means of radialis pulse amplitude failed, which is probably a consequence of artifacts in radialis pulse amplitude.

Adult↗
PubMed1980

[Dental treatment, a form of medical assistance?].

A forensic problem involving dental care may arise particularly if necessary treatment is not carried out or refused and if, as a result, the patient is exposed to considerable, possibly life-threatening, danger. Those dental, oral, and maxillofacial diseases as well as their cardinal symptoms were presented which could result in a negligence suit for the dentist.

Dental Care↗
PubMed1980

[Stress resistance of the bone in the Tübingen immediate implants].

The objective of this investigation is to study the behavior of enosseous implants, made of aluminium oxide ceramics (Tübingen-Type), under axial forces. Force and movement were measured simultaneously. The steady increasing forces were applicated with a miniature force transducer to the surface of the implant and the adjacent tooth, respectively. The resulting intrusions were recorded with noncontact inductive displacement transducers.

Biophysical Phenomena↗
PubMed1980

[The sensitivity to touch of the Tübingen immediate implantations].

The ability to perceive pressure and contact was determined in 20 Tübingen immediate implants. Marked qualitative and quantitative improvement in mechanoreception was observed after an embedment period of serveral years. The mode of healing and the regeneration of nerves were discussed in terms of their significance for the long-term prognosis of an implant.

Dental Implantation, Endosseous↗
PubMed1978

[Animal experiments on the question of healing around the Tübingen immediate implant].

In order to determine the capacity for deposition of bone, 5 Beagles were each implanted extraorally with 6 aluminium oxide cylinders into the horizontal mandibular ramus. 4 months after the first implantation a second implantation was carried out in the opposite side with similar cylinders. After six months all were removed so that in altogether 60 implants the bone deposition could be observed 4 months and 2 months after implantation. A further 14 dogs received altogether 55 Tuebinger immediate implants. All animals were regularly observed post-operatively. After 6 months all cylinder full-implants had been accepted without reaction. All tooth implants which were either not put under strain or were immediately put under pressure healed without reaction. After three months 19 implants were lost and a further 5 were lost after 8 months. All cylinder implants were histologically examined 6 months after first implantation.

Animals↗
PubMed1978

[Light and scanning electronmicroscopic studies of border surfaces of aluminum oxide-ceramic implants in the dog mandible].

The mandibular bone of beagles as well as foxhounds and the border surfaces in the area of implants of dense Al2O3 ceramic were examined by scan electron microscope and optically in undecalcified preparations 4 and 6 months after the start of the experiment. All implants healed without foreign body or inflammatory reaction and exhibited a firm contact with the newly-formed surrounding osseous tissue. The border surface was always formed by osseous tissue and bone marrow and not by connective tissue. The bony border surface presented a casting of the structure proper of the ceramics as well as orderly remodelling. The tooth implants which had in part been under strain for a long time were surrounded by newly formed osteoid bone and supported by bone trabeculi. In the immediate proximity of the surface of the ceramic vital osteophites were found. The gum which was placed in a groove of the step implants showed firm epithelial covering and orderly fibrous texture.

Aluminum Oxide↗
PubMed1978

[Concept and testing of the Tübingen immediate implant].

This introductory communication deals with the functional-anatomical, biophysical and neurophysiological considerations which led to the construction of an aluminium oxide immediate implant from a stepped cylindrical body. This intra-osseous implant differs in essential constructional features from the implant shapes known up to now; it endeavours to make use of the architecture of the natural gingival fibre apparatus for the placing of the mucosal cuff. Its surface was maximalised towards the bone, leaving out surface structures which could produce pressure points. The enlargement of surface compared with the root of the corresponding natural tooth amounts to 65 to 100% varying according to the shape of the implant. Descriptions are given of the concept of testing experimental implants, the physical and chemical characterisation of surfaces, animal-experimental steps, clinical tests including legal problems posed and the control system created with the view to large scale clinical trials.

Aluminum Oxide↗