Obviously over time, the shape of your mouth does change, bone and mass erodes away, so you do need to have regular check ups to make sure it's all fitting snugly. I also once actually managed to break the denture, but was able to get into a denture clinic, and he was able to repair it. And quite cheaply, which I was quite surprised about, and he also gave me a mould for my tooth and the denture so if it was to break permanently they would have something to work on, to recreate the denture again