If a tooth is missing, or needs taking out, there are several ways to fill the gap that is left. In some cases it is important to try to replace any missing teeth to balance the way your jaw bites. If you have several missing teeth, the remaining teeth are under more pressure. This can lead to broken fillings or even jaw problems.
A partial denture is the simplest way to replace missing teeth. However, some people find dentures uncomfortable and eventually decide to look at alternatives, such as bridges or implants.