Putting a permanent white veneer on the teeth
Question

My teeth do not cause me any problems, praise be to Allah, except that they are yellow with some white spots. This causes me a great deal of embarrassment and difficulty. I asked about whitening and they told me that it would not benefit me because of the varying colour of my teeth. But they told me that there is a permanent veneer for the teeth that is white and could solve my problem. What is the ruling on doing that?.
Praise be to Allah.There is nothing wrong with putting the veneer that you describe on the teeth, even if it is permanent, because the basic principle is that it is permissible and we do not know of any shar’i reason for not allowing that. 
And Allah knows best.