Cast PartialCast Partials are dentures designed to replace intermittent missing natural teeth. Metal is used to provide strength in areas where the denture would be too thin and would otherwise break. Special alloys have been developed that are resistant to the acid’s of the mouth, they are lightweight, and most important are safe and non toxic. These partials typically have a metal bar or plate with acrylic teeth on either side. Clasps (metal clips) are used to prevent the partial from dislodging.