The results were as follows:1. The residual ridge resorption may be effected by multiple factors simutanously. Systemic factors should not be ignored.

Results The peak value of anterior temporal muscle of linear occlusal dentures with severe resorption of residual ridge was higher than that of anatomic occlusal dentures ( P< 0.05 ).

The main research methods:(1) Screening the principal arguments influencing stock estimation by utilizing ridge trace analysis and the principle of residual mean squares.