الفهرس 
ACKNOWLEDGEMENT SOnly 14 pages are availabe for public view
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Abstract
A partially eduntulous cobalt-chromium maxillary cast representing ” Kennedy class 111 modification 1 ” with reference marks were prepared on the occlusal surface and buccal surface of premolars and molars as well as on the base of the cast of both sides and measurements were carried out on it . Three groups (agar agar , addition silicons ” medium consistency and soft putty consistency ”) were usedby duplicating the metallic cast into stone casts using the three duplicating materials and then compared to each other