Muscle pressures exerted upon the buccal and lingual polished surfaces of the lower dentures

The pressure exerted on the buccal and lingual polished surfaces of the lower denture from the surrounding soft tissues during various functions of the mouth was investigated to compare the standard denture (St-D) with the flange technique denture (Fl-D) . Five subjects who were missing their right and left first lower molars or more teeth participated in this study. The pressure was recorded by four miniature pressure sensors placed on the buccal and lingual polished surfaces of each side during the following movements. 1. Directed movements (jaw opening, tongue protrusion, upper and lower lips protrusion) 2. Swallowing (empty, water) 3. Chewing (right side, left side) The results were as follows: 1. The same tendency was observed in the case of the pressure between the St-D and the Fl-D during the various functional movements. 2. The Fl-D generally exerted more pressure than the St-D.