A. Hi many thanks for your enquiry, yes it is possible to have the crowns removed and replaced with better looking crowns. the key is to design the new crowns first on models of your teeth and then copy this design into your mouth, once you like the new design and are happy with the size, shape colour we can then copy this design into the final crowns so hopefully ensure you are happy with the final result. it is possibly to use the six month smiles with the crowns however i would be first best to see what level of movement is required. i would recommend you seek out a cosmetic dentist to help improve your smile. many thanks