Mohamed Salah Eldin Gomaa <br/><br/>
The effect of stiffness of impression materials and flexibility of trays on the casting accuracy /  
 تأثير صلابة المواد الطابعة ومرونة الطوابع على دقة الصب 
Mohamed Salah Eldin Gomaa ; Supervised Rabab Mohamed Ibrahiem , Rasha Nabil Mohamed Sami 
 - Cairo :   Mohamed Salah Eldin Gomaa ,   2012 
 - 106Leaves :   charts , facsimiles ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Prosthodontics 
<br/><br/> Study the effect of using two impression materials of different stiffness with three impression trays of different flexibility on the casting accuracy of cast metal copings . The mandibular right first molar of a typodont model mounted to a semi- adjustable articulator was prepared for a full coverage cast metal coping . Thirty impressions were made with metal dual - arch impression trays , plastic dual - arch impression trays and a custom made acrylic resin impression tray using polyvinyl siloxane and polyther impression materials 
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<br/><br/><label>Subjects--Index Terms: </label>Dual arch trays  Elastomers  Marginal gap