TY - BOOK AU - Doaa Mohsen Mosaad Mohamed AU - Hebatallah Mohamed Maged Elfar , AU - Nadia Amin Badr , TI - Effect of mechanical preparation and sterilization on the topographical characteristics and metallographic structure of RaCe Ni - Ti rotary instrument : : An in vitro study / PY - 2010/// CY - Cairo : PB - Doaa Mohsen Mosaad Mohamed , KW - Microhardness KW - Roughness KW - Sterilization N1 - Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Endodontics; Issued also as CD N2 - 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 UR - http://172.23.153.220/th.pdf ER -