You may wish to see about getting an acrylic overlay for the rough tooth -- I had this done recently for a molar that had an old filling and a sharp edge which rubbed the side of my tongue, making it sore, when I spoke (and I wasn't even recovering from radiation!). The dentist removed the old filling and made a lovely impossible-to-tell-from-rest-of-tooth overlay (not a crown, no metal) that restored the external appearance of the tooth (and its smooth contours). It is glued on and so far (months and months) has not budged.

Gail