One of the greatest challenges in dentistry is treating heavily discoloured teeth. Things get more difficult when discoloured teeth are
healthy and intact. Challenge lies in achieving exact colour- and shape match, whereas traumatising teeth as minimum as possible.
In the following case 3 front teeth beared different levels of discolouration
Conservative approach demanded drilling to be applied on the outer .03- .08 mm of tooth thickness, i.e only on the enamel. That implies innervated dentine was not hurt at all, which was one of our major tasks. Anesthesia was not administered and acceptable outcome was accomplished with 3 e-max veneers in only 2 appointments
See all stages of the case here