I am a dental hyiene student and we studied dental stains eairler this semester. "Black Line Stains" are a calculus like stain that forms along the gum line of the tooth. It is a stain that occurs more commonly in children and women and oddly enough it is associated with clean mouth. The treatment is regular dental cleanings by your hygienist or dentist. And with this particular stain, good dental hygiene will not help this stain because there is no one particular thing that will cause it. It also has a tendency to recur despite regular personal oral care.
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