Q. My front tooth and one my doubles at the side have become very sensitive – on the front one it seems to be at the very top inside I have been back to my dentist three times and he gave me some brown flouridge to apply each night but this has made no difference – he says the only way to cure it now is to remove th nerve. Years ago I remember that there was some type of coating that was put over the teeth and ultra violet light was used to harden it in fact I had a very tiny tooth next to my large front tooth and my dentist at the time made it a bit bigger using this method and it has lasted some 30 years – do you still use this method or have I no alternative other than to have the nerve removed and I assume a cap put on. I need to keep costs to a minimum.