What are options when new crowns have gray spots in the center?

Is it a shine-through of the underlying tooth and/or cement that you see through the veneers and crowns? If so, cosmetic dentists often call this "headlights" and is a result of the technician making the porcelain too thin at those spots and/or the dentist not adequately preparing the tooth enough to hide the color of the root shining through.If this is the situation, and your veneers and crowns have already been bonded into place, you have two options. One, you can live with them. Or two, you can have them redone.Go back to your dentist, tell him you are unsatisfied with the results and if there is a solution to this you want to know what it is so that you can choose what you want him to do.