Saratov JOURNAL of Medical and Scientific Research

bilateral variability

Morphometrical variability of dental alveoli of mandible in adults

Year: 2016, volume 12 Issue: №2 Pages: 110-112
Heading: Macro- and Micromorphology Article type: Original article
Authors: Aleshkina O.Yu., Rossoshansky D.N., Polkovova I.A., Bikbaeva T.S.
Organization: Saratov State Medical University
Summary:

Objective: to determine the morphometrical variability of dental alveoli bilaterally, depending on their position in the alveolar part of the mandible. Material and Methods. The object of the study is to certify 70 cranions with mandibles of middle-aged adults (21-60 years) and 30 isolated mandibles without gender-and age-related characteristics. The objects of the study were taken from scientific cranial fundamental museum collection of the Department of Human Anatomy. For the scientific research Craniometry method was used according to generally accepted craniology process parameters. Dental alveoli on both sides of the mandible were studied. Results. It was established that longitudinal diameter prevails at tooth alveoli of a canine, the first and second premolars, cross diameter on the same side of a jaw at the left — at alveoli of a medial incisor and the first premolar in comparison with its right side. At dental alveoli the left-sided depth is larger of the first molar, of the second molar — the right-sided is larger. Longitudinally cross diameter in the direction from alveoli of front teeth to back ones increases at each subsequent alveolus, since the minimum size at incisors and reaching the maximum size at alveoli of the first and second molars. The largest depth of tooth alveoli is determined at a canine, the first and second premolars. Conclusion. Results of the research of bilateral and individual variability of parameters of tooth cells may be used in practical stomatology.

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Age-Specific And Sexual Variability Of Morphological And Biomechanical Parameters Of Anterior Cerebral Artery Of Adults

Year: 2009, volume 5 Issue: №4 Pages: 482-485
Heading: Macro- and Micromorphology Article type: Original article
Authors: V.N. Nikolenko, О.А. Fomkina, I.V. Kirillova, D.V. Ivanov
Organization: Saratov State Medical University, Saratov National Research University n.a. N. G. Chernyshevsky
Summary:

In the experiment on monoaxonic longitudinal distension by tensile-testing machine Tira Test 28005 (Germany) with loading unit - 100 N the general rigidity, breaking point and relative lengthening of anterior cerebral artery (АСА) of adult people have been under study. Under the microscope on transverse sections the external diameter of the artery, its wall thickness have been measured and diameter of lumen have been calculated. In total 228 АСА (132 - from corpses of men, 92-from corpses of women) have been investigated. They have been received in 16 hours after autopsy of adult people whose cause of death has not been connected with vascular cerebral pathology.
It has been revealed that right АСА is longer and narrower than left one. ACA's wall length and thickness predominate in men in comparison with women in average of 5,4 - 13,0%. With years АСА lengthens, its external diameter increases. Biomechanical parameters of ACA's wall do not have any authentic sexual differences, they don't depend on the side of the arterial ring. With years the rigidity of АСА decreases, especially in middle age. In old age its general rigidity increases. It is connected with the increase of ACA's wall thickness. The ability of АСА to lengthening doesn't depend upon age. Experimental findings may be used as criteria of age standard of morphological and biomechanical parameters of АСА

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