While we all prefer to keep our teeth healthy and functional for the long run, there are cases in which teeth are lost or need to be extracted. This can be due to tooth decay, periodontal disease, trauma from an injury, or various other reasons. In cases when most or all natural teeth are non-restorable, and if a patient lacks the bone density necessary to support implants, partial or complete dentures may be the best course of action. If some natural, healthy teeth remain, you have the option of getting a partial denture to replace missing teeth. If no healthy teeth remain, then a complete denture, replacing all natural teeth would be recommended.