Porcelain Veneer Dentin Bonding - Is This as Strong as Enamel?

I would always go with the most conservative approach and save as much of the tooth as i can. I think it the chip is small enough, i would use minimal prep veneers.  Most of it would be bonded to the enamel which is stronger than dentin, and you save most of the tooth structure.  I am not fond of taking down a tooth that i do not have to, only to achieve an aesthetic purpose which could have been achieved with a less invasive procedure.

My advice to you would be ask your dentist to show you pictures of minimal prep veneer cases that he has done so you can see how good they look.  If you are not happy with what you see, i suggest you look for another dentist who is proficient in both procedures and ask to see pictures that he has taken of his patients.....he should always have a smile gallery that you can look at.  Hope this helps!

A competent cosmetic dentist can bond your veneer well in most situations. Personally, I think too many veneers come out looking too thick because the dentist actually didn't prepare the tooth enough. It is always a fine line between how conservative to be, and any trade-offs in the final aesthetic result.

In my opinion, a larger factor on how long the bond lasts relates to how well you clean it and how well the forces that chipped the tooth to begin with are controlled. Often times this means precise matching of the bite-especially the sliding motions. In addition, you may need a nightguard for extra protection. 

In my opinion, I wouldn't worry about the dentin vs enamel bonding.