[The dimensions of cast bar dentures].

The influence of the moment of inertia on the periodontal alterations developing in abutment teeth was determined in 181 cast sublingual partial bar dentures after an average of 4 1/2 years. A significant influence could not be established. A considerable increase in the degree of loosening and/or pocket depth was observed when the dimensions were too small. It therefore is recommended that the minimal dimensions of the sublingual bars with segmental profile should not be less than 3.2 mm in height and 1.6 mm in width.