Doaa Mohsen Mosaad Mohamed <br/><br/>
Effect of mechanical preparation and sterilization on the topographical characteristics and metallographic structure of RaCe Ni - Ti rotary instrument :   An in vitro study /  
 تأثير الاستخدام الميكانيكى والتعقيم على الصفات السطحية والتركيب المعدنى لاداة الريس الدوارة المصنعة من النيكل تيتانيوم :   دراسة خارج الجسم الحى 
Doaa Mohsen Mosaad Mohamed ; Supervised Hebatallah Mohamed Maged Elfar , Nadia Amin Badr 
 - Cairo :   Doaa Mohsen Mosaad Mohamed ,   2010 
 - 91 Leaves :   charts , facsimiles ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Endodontics 
<br/><br/> The purpose of this study was to assess the topographical characteristics and metallographic structure of RaCe Ni - Ti rotary instruments after mechanical preparation and sterilization cycles . A total of fifty RaCe rotary instruments were used ; 5 intact files represented the control Group I. Groups II, III and IV were divided equally into fifteen files each 
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<br/><br/><label>Subjects--Index Terms: </label>Microhardness  Roughness  Sterilization