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The gingival index (GI) and the Orogranulocytic Migratory Rate (OMR) were determined for 86 subjects. The statistical analyses revealed a highly significant correlation between the two parameters. An analysis of regression demonstrated that the correlation of GI and OMR changed with low to high values of GI, probably because GI is not a true parametric index.

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– The rate of cell proliferation in homogeneous leukoplakias was compared with that of normal mucosa. Biopsies from six patients were labeled in vitro with tritiated thymidine and the labeling indices relative to (1) the total cell population, (2) the progenitor compartment, and (3) 100 μm surface length, were determined on autoradiographs. In leukoplakias, cell renewal and mitotic cycles were faster than in the epithelium of controls.