One of my front tooth has turn blacked after a few years of root canal. I have sought help from one dentist. He suggests me to have a verneer tooth instead put on a crown. However, my dentist could not get the technician to produce verneer tooth that with the similar color to my other original front teeth. The color of verneer tooth is too milky and thick. Now, he recommends me to replace with porceline crown.
I hope someone can tell me the difference between Verneer and Porceline Crown.

Thank you.

See the explanation here.