TY  - BOOK
AU  - Mahmoud Kamal Shams Eldin
AU  - Hend Mahmoud Abouelnasr , 
AU  - Medhat Abdelrahman Kataia , 
AU  - Nadia Amin Badr , 
TI  - Effect of sterilization on torsional resistance two different nickel- titanium rotary endodontic systems / 
PY  - 2011///
CY  - Cairo : 
PB  - Mahmoud Kamal Shams Eldin , 
KW  - K3
KW  - Microstructure
KW  - Protaper
N1  - Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Endodontics; Issued also as CD
N2  - The aim of this study was to explore the effect of repeated sterilization on the surface and microstructural characteristics of two rotary nickel- titanium endodontic instruments . The results obtained showed that repeated sterilization cycles had no significant effect on the phase and  crystallographic changes of ProTaper and k3 files. On the other hand sterilization by autoclave had slight but no significant effect even on the surface topography of ProTaper and k3 files
ER  -