I had a pretty small chip on one of my top incisors for almost 20 years, and I finally decided to get it fixed two months ago. At first I was happy as could be, but now if I look close, I can see the outline of where the tooth was bonded, which I didn't notice before. I don't know if it has been there all along or if I've just noticed it now. Granted, it's only visible when I look close in a mirror, but I was under the impression that it would be almost completely invisible. I almost want to have it redone, but I'm not sure if it will always be somewhat visible. Can someone help me out? Thanks.