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Biomedical subjects

D Ivánkievicz

Publications and source records attributed to D Ivánkievicz.

12 recordsLinked to original sources
PubMed1979

The role of function in the formation of the skull.

Partial resection of the mandible, resection of the chewing muscles, amputation of extremities and ligature of the common carotid artery were performed in animals different in chewing type (dogs, sheep, rabbits and rats). These studies revealed a close relation between shape and function. It was shown that changes in function have a decisive effect on the development and shaping of the skull bones and musculature.

Animals↗
PubMed1979

[Experimental studies on the development of human skull fractures].

Pressure tests were performed on certain well-defined points in the median-sagittal plane of soft part covered skulls of 40 human corpses. It was found that the elastic behaviour of the skull obeys Hooke's law, thus the modulus of elasticity is the Ist differential quotient in the stress-strain diagram. Beside the vectorial nature of the compression force the point of application is also of decisive importance. The globe-ellipsoid theories do not correspond to the structure of human skulls. Autopsy revealed over 50% more confirmed fractures than the X-ray pictures. This contradiction in the diagnosis of fractures on the human skull can be reduced by series of X-ray pictures. The lines of the fractures run to the most part along the Benninghoff--Goerttler pillars of strength. Additional biostatic parameters (maximum load before breaking, coefficient of elasticity, stress, elongation etc.) were also obtained which permit an insight into the specific mechanic structure of the human skull and its load-bearing ability.

Biomechanical Phenomena↗
PubMed1978

[Experimental studies on the compression resistance of the head with special reference to the mechanism of fractures in traffic accidents].

Compressional resistance of the head and its role in the mechanism of fractures in traffic accidents were studied in five formalin-fixed heads. Before and after the experiment X-ray examination was carried out. Because of the variability of fractures coming into being, it was difficult to distinguish definite types. Nevertheless, experimentally produced fractures appeared to be nearly the same, as those seen in clinical practice.

Accidents, Traffic↗