Tooth colour depends on the enamel and dentin. Enamel is the outermost layer and dentine which is just bellow the enamel. The colour of teeth is determined firstly by the actual colour of dentin which tends to be yellowish and then it depends on how many layers of the enamel are present there. The more layers present there means more translucent, the less layers of enamel means the shade of dentin appear and the colour of dentin is yellow so ultimately the colour of the tooth will appear yellow. The more layers means the shade of dentin will not be appear and the colour of the tooth looks white. No Artificial whitening method is there which change the colour like more layered enamel tooth.
As for milk teeth, they are whiter because there dentin is not fully developed which is yellowish in colour. so there is no question arises of yellowish teeth.
Many people have many doubts regarding colour of tooth. Many people says our teeth are yellowish and we would like to whiten it.
This is totally a myth . No body can change your colour of teeth even god himself.
This is natural colour which u got I am going to explain you about colour of teeth in different way Let us suppose that, A piece of charcoal on a table and we see it through a white thin cloth sheet. how it looks, The charcoal shade will appear slight less. And as we increase number of cloth sheets, the charcoal shade doesn’t appear and we see only white cloth. Just like it. There is dentin in our tooth which is yellow (just like charcoal) in colour and layers of crown(layers of cloth) on it. The person during growth having more layers of crown . the tooth appears white and another who has less layers he got little yellowish teeth accordingly . This is difference No need to go to dentist and ask for whitening of teeth. If you go he will charge you and definitely do things that will not suitable for your teeth.
so read all these things and see it practically. these are shades of colour like A1, A2, A3, B1, B2 and many more. these are all healthy teeth.
oral health 