[Functional-morphologic aspects of changes of mucosal gingiva microcirculatory bed vessels in experimental gingivitis...

The study of mucosal gingiva microcirculatory bed in conditions modeling the change of vascular wall permeability that promotes cell migration and plasmorrhagia. The experiments were made on 3 groups of chinchilla rabbits--body weight 1,7-2,5 kg: I-experimental gingivitis (10 animals); II-experimental hypercholesterolemia--the rabbits received aterogenic diet (0,3 g/kg of cholesterol) (10 animals). Two month after the aterogenic diet, gingivitis was modelled against the background of hypercholesterolemia (control for group II). IV-series--conditionally "normal"--5 rabbits. The light-optic and electron microscopic studies have revealed significant changes in extracellular matrix and gingiva mucous cells as well as in microcirculatory bed components in hypercholesterolemia. Hypercholesterolemia damages endotheliocytes, subendothelial zone, basal membrane abd changes permeability. The contact of lymphocytes and plasmocytes with the vascular wall confirms the trigger role of the vascular factor in damaging of periodontal complex.