Dentures, (also known as false teeth), are prosthetic devices constructed to replace missing teeth. They are supported by the surrounding soft and hard tissues of the mouth. Conventional dentures are removable (removable partial dentures or complete dentures). However, there are many denture designs, some which rely on bonding or clasping onto teeth or dental implants (fixed prosthodontics). There are two main categories of dentures, the distinction being whether they are used to replace missing teeth on the mandibular arch or on the maxillary arch.