GRADE 1: Tartar is on the crown of the tooth, but not against the gums.
Grade 1
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GRADE 2: Tartar is on the crowns and is touching the gums.
Grade 2
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GRADE 3: Tartar is against the gums and gums are inflamed.
Grade 3
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GRADE 4: Tartar is thick against the gums, loose teeth, possible pus present, gum recession.
Grade 4
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