What treatment would you say is best for replacing tooth that crumbled away when braces were removed?

Q. When I had my fixed braces taken out one of my teeth just crumbled away. it is to the side but can still be noticeable when I smile. I hate it, but figure it must have happened because I was not cleaning the area properly. There is still some of the tooth left. Would you say implants or another treatment is the best option?,