Throughout your lifetime, dentures will need to be replaced and adjusted which can become time consuming and expensive. It is a simple fact that dentures start to become loose and can break through normal activities such as talking, eating, etc. If a denture arch breaks, it may be possible to repair but in some cases it will need to be replaced entirely.
Dentures are just one option for replacing missing teeth; some of the others include fixed bridgework and dental implants. Each method has its particular pluses and minuses, which should be carefully considered. There are also several varieties of dentures available to address specific issues, from partial dentures to implant-supported overdentures. The best option for you will depend on your individual situation.