TY  - BOOK
AU  - Alaa Fraeg Othman Hasanain
AU  - Ahmed Abdelsalam Eid , 
AU  - Fouad Aly Elsharaby , 
TI  - Mechanical properties of orthodontic nickel-titanium open coil springs / 
PY  - 2012///
CY  - Cairo : 
PB  - Alaa Fraeg Othman Hasanain , 
KW  - Mechanical
KW  - Nickel-titanium
KW  - Orthodontic
N1  - Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Orthodontics; Issued also as CD
N2  - The aim of this study was to compare and quantify the mechanical properties of commercially available nickel-titanium open coil springs supplied by five different companies. Sixteen groups of springs, each comprised ten springs (totally 160 springs) from five manufactures were tested 4 times over a 4 week period. A universal testing machine was used to measure the force characteristics when the springs were compressed to half of their original length and then when gradually allowed to decompress
UR  - http://172.23.153.220/th.pdf
ER  -