Sometimes you can remove a crown without damaging it and re-glaze it. But it is very rare. So to give you a simple answer have it re-done, insist on it. My other recommendation, find a new dentist, a choice you always can exercise!!!!
If it is an esthetic issue have it removed. If the crown is properly sealed leave it. But since it is something that made you aware of and made you post your question on this forum, then it is bothering you....so I believe you want it to be perfect? Right?
Thank you for answering. Is there anyway to take off the crown & reglaze it? My dentist told me he has done all he can. There is also a large gape behind the crowned molar that gets packed with food. I expressed concern with decay or gum problems but he told me it probably won't be a problem as I've been taking good care of the crown. Is it too much to ask to have a crown without flaws? The color of the crown does not match my teeth. I'm just very disappointed.