<s>[INST] Hi,i m of 28 years.my teeth are of yellow color.that seems to be dirty.i brush daily but no effect.please tell me how can i make my teeth sparkling. [/INST] Hi, The reasons for a yellowish teeth are presence of calculus and deposits over the tooth, loss of enamel, staining by tea, coffee and other foods. First get a scaling and polishing of teeth done. if the discoloration persists get a bleaching done. if it is not removed fully you can go for ceramic veneers or crown on your teeth which is a permanent remedy. </s>