Structural reorganization of the rats' submandibular glands acini after the influence of 1% methacrylate.

OBJECTIVE: Introduction: Polymeric substances, which are used in medicine, can lead to the development of pathological conditions. Therefore, in toxicological evaluation of polymeric materials for medical purposes the primary task is the creation of the appropriate adequate methods of study. The aim: To studytheacinioftherats'submandibularsalivaryglandsin normalcondition andafter exposureof 1% methacrylate. PATIENTS AND METHODS: Material andmethods:Were studied 50 white rats during the influence of 1% methacrylate on the mucosa of the oral cavity. Histological sections of the rats'submandibularsalivary glands in normalcondition, on day 14 and 30 of experiment were studied using the UMPT - 7 ultramicrotome of Sumy PA "Selmi". RESULTS: Results and conclusions:Themorphometric study hasestablishedthat in control group thevaluesof theouterdiameterof thesubmandibularglands' acini, the diameter of the lumen and the height of the acini epithelial cells was 36,27±2,17 µm,9,47±0,63 µm and 14,18±1,05 µm, respectively. Histological specimens showed that the acini cells had a prominent basophilia of the cytoplasm and the basally located nucleus. Numerous large homogeneous granules were located in the apical pole of the cells. After influence of the 1% methacrylat there is an increase in the activity of secretory cells, which is confirmed by an increase in the height of epitheliocytes by 25.04% and is a compensatory metacrylate reaction. The increase in salivation further leads to complete depletion of the secretory apparatus of the seromucosal cells, which is confirmed by a decrease in the outer and inner diameters with a decrease in the height of the mandibular salivary glands acini cells by 24.40%.

Morphometric description of the exchange segment of microvasculature of rats' salivary glands in normal conditions and chronic ethanol intoxication.

OBJECTIVE: Introduction: The state of the segments of the microvasculature, especially exchange one, has a significant effect on the organs' functions. The results of it's research can be objectified by morphometric method. The aim: to determine the dynamics of changes in metric indices of the exchange segment of microvasculature of rats' submandibular glands in normal conditions and in chronic ethanol intoxication. PATIENTS AND METHODS: Materials and methods: 45 albino rats were involved into study. Intact group (n=5) animals were administered with NaCl isotonic solution 4 times a day directly into the stomach. Experimental group (n=40) animals were administered with 40° ethanol 4 times a day directly into the stomach. Animals were sacrificed on 5, 9, 12 and 30 days by overdose of thiopental anesthesia. Lobules of submandibular glands were embedded into epon-812 according to standard procedure. RESULTS: Results: On day 5 of the experiment the outer diameter of the capillary wall significantly reduced (4,91±0,02 µm), that is 19,5 % less than the values in controls (р<0,05). On day 9 of the experiment it was 15,2 % lower than the value of control group (р>0,05). On day 30 of the experiment the outer capillary diameter was 8 % lower compared to controls (р<0,05). CONCLUSION: Conclusions: The early observation showed vasodilatation, confirmed by the constriction of the outer diameter and lumen diameter, accompanied by the thickening of the vascular wall under the influence of chronic ethanol intoxication. The indices did not come to normal values by the 30-th day of the experiment.