Evaluation The Dimensional Accuracy Of Dental Dies With Two Different Casting Materials: An In-Vitro Study

Objectives: This study evaluate the linear dimensional accuracy of two dental casting materials ( Plaster type IV DK MUNGYO and industrial modified Epoxy resin). Materials and Methods: Standard master model with two cylinders printed by 3D printer was used to create 30 impressions using a polyvinyl siloxane impression material and randomlydivided into two groups (n = 15) according to the type of casting material, After the setting/polymerization of the casting material, the dimensional stability was measured in terms of the diameter from the obtained dies and from the standard master model using a profile projector (BATY SM-350) Results: Results were analyzed by T-Student test, revealed that there are significant difference between thetwo groups in the diameter of the two cylinders , Industrial modified Epoxy resin showed statistically lower mean diameter values, compared with the other group, no significant difference between the two groups in the distance between cylinders was observed, comparing with the master model the two groups were smaller in dimension .