A. It sounds like you have had a composite filling- these can stain over time- especially with foods such as curry and other highly coloured foods and drinks. Staining can often be superficial, but it sounds like it may be need to be replaced. Venners are something that you can consider as the porcelain doesn’t stain and can look as natural as your own teeth. I recommend that you return to your dentist to havethe filling replaced and then to talk over some more long term options.