Reevaluation of Clinical Parameters on Experimental Gingivitis in Man

Abstract

The purpose of this study was to investigate the relationship between plaque index and some clinical parameters on experimental gingivitis in man. The subjects were ten clinical students. Gingivitis was produced in students with healthy gingivae by withdrawing all active efforts directed toward oral cleanliness for 19 days. Gingival index, gingival bleeding index and gingival crevicular fluid flow were measured as periodontal parameters.
A significant correlation was observed between plaque index and other clinical parameters in the order bleeding index>gingival index>crevicular fluid flow. In the healing stage of gingivitis after reinstitution of oral hygiene, the plaque index and bleeding index were highly correlated.
It is concluded that the bleeding index is a useful parameter for evaluating inflammatory state in the plaque accumulating and removing stage.