Abstract

Dr. Ann George*, Dr. George Francis, Dr. Paul kariyatty and Dr. Arun K. Joy

ABSTRACT

Replacing missing teeth distal to the last standing teeth with removable partial dentures is a very challenging situation to dentists. They are liable to be displaced under occlusal pressure as a result of the displaceability of the mucosa. In this article, we use a clinical case to illustrate the clinical procedures required for the fabrication of a distal extension denture with good retention, support, stability, aesthetics and masticatory function. The altered cast technique is employed to try and prevent this by making an impression of the mucosa under controlled pressure. The metal framework was constructed on a cast produced by a mucostatic impression material. Base plates were then constructed in self-cured acrylics on the framework in thedistal extension areas, and these are close fitting. Border molding was carried out; impression was made with zinc oxide eugenol impression paste. In the laboratory, the distal extension areas on the master cast are sectioned off. The denture is then positioned on the model and the new distal extension areas are poured. The resulting model represents the free-end saddle areas under conditions, which mimic functional load. Denture construction then continues as normal. The distribution of loading of the free-end saddles is improved and denture is more stable.