Periodontal Attachment LossPeriodontal PocketPeriodontal IndexDental Plaque IndexPeriodontal DiseasesGingivitisDental Devices, Home CarePeriodontitisTooth MobilityTooth MigrationGingival HemorrhageChronic PeriodontitisGingival RecessionDental ScalingOral HygieneDental PlaqueGingival Crevicular FluidEncyclopedias as TopicAggressive Periodontitis