Functional hyperemia developing in the periodontium after 30 sec chewing of a half of a standard chewing gum plate was studied by a noninvasive quantitative method. In subjects with clinically normal periodontium and normal tonic tension of the regional vessels the peak blood flow develops within the first minute of chewing and further vasomotions restore in 30 min. In changed vascular tone, particularly so in periodontal diseases, hyperemia develops persisting for at least 30 min.
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