[Plastic prosthesis for tooth gaps]

Long term observations show, that acrylic partial denture find at the abutments with hook clasps cause more trauma to the periodontal tissues and the denture-bearing area than other removable partial dentures. In this connection it must be considered, whether the acrylic partial denture being a temporary prosthesis, is planned, prepared and manufactured with the same dental and technical accuracy as a definite removable prosthesis. Presuming that the planning, manufacturing, and the shaping of the acrylic partial denture follows the principles of stabilizing function and periodontal hygiene, less trauma on the structures of the masticatory system and therefore an extended indication seems to be possible. To make this evident, the following essential rules of treatment and design are presented: functional impression of the denture bearing mucosa, bite registration, extension of the prosthesis, clasps and recall.