When a tooth is missing there are several alternatives in addition to a dental implant.
If the adjacent teeth are heavily filled, then a three tooth cemented bridge may be a good alternative. Keep in mind that a cemented bridge can slightly increase your chance for cavities, so if you are cavity prone, this may not be a good option for you. A more conservative cemented option is called an inlay bridge. Although it is much more conservative, it's still requires a bit more homecare than a freestanding tooth and therefore may be more prone to cavities .
The major advantage of a dental implant Is that it is easier to clean because it is a freestanding tooth and it is impossible for an implant to get a cavity.
I hope you found this information to be helpful,