Basically today I had a bizarre suggestion; someone told me that my Dura Ace 7900 crankset (a 53 chainring) needs replacing because some teeth are worn from use.
I ask myself, is that possible? I've had Dura Ace before and the only thing I've heard about changing every once in a while is the (rear) cassette.
What do I have to do? Change my chainring, buy a new one for 200 euros? I believe it is impossible for people to buy cassettes and chain rings every year. I am not a pro cyclist to ride many thousands of kilometres a year!