When a lot of a tooth is missing, and the tooth structure is compromised and weakened, and no longer able to be kept intact with a standard ‘filling’ long term without future complications, you have the option of either a crown or onlay to restore the tooth.
Having an onlay is the most preferred and least invasive of the two options to strengthen a weakened tooth. However we can only proceed with this process if some of the walls of the existing tooth are left intact, as the onlay is designed to fit over the top.
Crowns cover the entire tooth right down to gum level, so can be very useful to cover a very dark tooth or a badly broken down tooth, restoring your ability to eat.
Crowns and onlays can be made out of different materials and your Dentist will discuss which option is the best for you, so that you can make your own decision.