yellow marks are nothing but calculus or tartar which forms due to improper brushing, I should b cleaned once in every 6 months.. u can use toothpaste which has pyrophosphate.. it shud b used after professional cleaning/ scaling, it helps prevent formation of tartar..
These yellow marks are due to tartar build up which can also cause weak gums,bad breath and eventually loss of teeth.They have to be removed professionally by a dentist,and regular dental check up is must .
These yellow marks are what are known as tartar. these are hard deposits on teeth which will not go by brushing. It will have to be removed by a dental surgeon by doing scaling of teeth or cleaning of teeth.
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