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Biomedical subjects

H Hampel

Publications and source records attributed to H Hampel.

At least 127 records · Page 7Linked to original sources
PubMed1977

[Studies on the uses of the electronic image evaluating device "Densitron" for the evaluation of dental radiographs. III. Standardisation in densitometry].

The authors outline in two papers to what extent the interpretability of a radiograph is changed when converted by means of the Densitron. They confined themselves to the interpretation of dental films and panoramic radiographs. For reasons of clinical interest, particular attention was paid in dental films on localized processes (such as dental caries), and in panoramic radiographs on possible bone diseases as a sequel or concomitant affection in case of renal insufficiency, diabetes mellitus and hyperthyreosis.

Densitometry↗
PubMed1977

[A new form of endosseous titanium hemi- implantation and study suggestions aiming at physiological healing].

Bearing in mind the favourable force distribution of the hitherto currently used blade implants and allowing for the Second Symposium on Maxillofacial Surgery at Warnemünde in 1976, the authors devised a technique in which a titanium implant is placed. This procedure promises in the main three advantages: 1. No wedging action on the bone during operation and during mastication. 2. Better force distribution. 3. The mucosa-periosteum suture no longer coincides with the bone groove required for implantation. Furthermore, the authors deal with techniques for coating the titanium angle implant to achieve biological healing.

Dental Implantation↗
PubMed1977

[Prosthetic aspects in endosseous implantation].

Since 1975, 12 intra-osseous titanium blade implants have been applied to patients with unilateral or bilateral edentulousness of the terminal region of the mandible or with combined mandibular edentulousness. After taking impressions by means of individually fabricated transmitting copings and medium-flow silicone impression compounds, the temporary plastics bridges and the definite telescope bridge prostheses were made of precious metal alloys, using the "Biokop-Orthomat". Essential prerequisites for optimal functional performance of the implant bridge constructions are: creation of optimal occlusal conditions, tangential blocking of the remaining teeth by splinting one implant abutment with at least two natural teeth, and gingiva-free modelling of the telescope and crown margins at the implant abutment.

Dental Implantation, Endosseous↗
PubMed1976

[Improvement in the radiographic interpretation in acute osteomyelitis of the jaw by means of the densitron].

As the acute stages of jaw osteomyelitis are not visible on the normal radiograph, the author used the Densitron to convert into colour elements the gray-values of the the radiograph. The Densitron picture discloses the beginning of the loosening of the bone structure already in stages when not any peculiarity is revealed by the normal radiograph. The Densitron is a valuable tool for establishing objectively the early diagnosis of acute stage of osteomyelitis (so far mainly based on anamnestic indications and clinical manifestations), which is of importance to purpose-oriented early treatment.

Absorptiometry, Photon↗
PubMed1976

[Problems of radiographic documentation].

This paper aims at describing the present situation in the field of radiograph documentation such as is typical of some clinics in the GDR. Furthermore, a suggestion is given that involves the possibility of reducing all sizes of radiographs (especially those greater than dental radiographs) to the size of 10 X 10 and of mounting their copies on punched cards (window principle). These copies can be enlarged and presented on a monitor. Other techniques such as video tape storing are not dealt with.

Dental Records↗
PubMed1975

[Systemic error during measurement of dp/dt using conventional heart catheters and their correction].

The influence of 4 different types of conventional cardiac catheter on the systemic error during measurements of dp/dt was investigated by testing the frequency response. This was done by coupling on end of the fluid-filled catheters to a newly developed sine wave pressure generator (0-100 Hz), and the other end ot a pressure transducer (Statham 23 Db). The obtained electrical signal was preamplified and differentiated by means of a differentiation amplifier (linear rise up to 20 Hz). Also investigated was to what extent the dp/dt registration (UV-Oscilloscope) could be improved by damping the signal by means of electrical low pass filters.

Blood Pressure Determination↗