one has to understand the type of yellow line.there r two types of stains,extrinsic n intrinsic,means outside n inside the tooth.
the stains which r outsude means extrinsic can b removed by a procedure called as scaling
if stains r internal,inside the tooth then they can not be removed.they can be either masked by laminates or lightened by bleaching
a clinical evaluation is a must to come to proper conclusion
Answered2019-05-28 04:25:21
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