Cytochemical studies of glycogen of oral mucosa cells have been made on the smears by freeze-drying and PAS staining. The specimens were obtained from different areas of oral cavity of 77 human subjects and an attempt was made to find some interrelation amoung glycogen deposition, keratinization and inflammation. The largest glycogen deposition was found in the mucosa cells from mouth floor and cheek, a little in those from gingiva and quite a small or no glycogen in those from mucosa of hard palate and tongue.
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