Fact accounting for an ascertained influence of supragingival debridement on the subgingival ecosystem may be seen in unintended and unperceived instrumentation of pockets during supragingival cleaning and in the fact that patient-performed oral hygiene may reach beyond the gingival margin,especially in more shallow pockets.Healing of the marginal gingival with a concomitant reduction in probing depth may result from supragingival scaling,thus inducing changes in subgingival ecology.In addition,even plaque sampling itself,especially if performed repeatedly,may cause alterations in the subgingival ecological niche.Despite the fact taht supragingival plque has been shown to serve as a reservoir for gram-negative organisms,supragingival scaling alone is insufficient for the treatment of periodontitis.

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• What is the treatment of gingivitis?
• Subgingival scaling