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A partial is a dental prosthetic (artificial tooth or teeth) that can be removed from the mouth somewhat like an orthodontic retainer. A bridge, on the other hand, is a dental prosthetic that's permanently anchored inside the mouth. Partials are sometimes referred to as RPDs (removable partial dentures). They're often selected as an inexpensive option over a bridge or dental implant for replacing lost teeth. Most partials work in a similar way: Artificial teeth are placed on a molded base to which metal clasps are added.
Partial Dentures: Partial dentures can either be made with a plastic base or a metal framework that supports the number of teeth that need to be replaced. It is held in the mouth by using clasps and rests that are carefully adapted around the natural teeth.