Effect of Cast Modification on Linear Dimensional Change of Acrylic Tooth Position Following Maxillary Complete Denture Processing.

Purpose: To investigate the effect of different cast modifications on the vertical and horizontal tooth position following maxillary complete denture processing.

Materials And Methods: A total of 60 maxillary master casts were prepared and arranged in six groups (n = 10). Variation in modifications between study groups 1 through 6 were as follows: no modification, butterfly post palatal seal preparation only, butterfly post palatal seal preparation with 10 mm wide/4 mm deep box, butterfly post palatal seal preparation with 10 mm wide/4 mm deep box and four round holes, butterfly post palatal seal preparation with 20 mm wide/4 mm deep box, butterfly post dam preparation with 20 mm wide/4 mm deep box and four round holes, respectively.