Sharif Mohammed Bushnaq  <br/><br/>
Dual force magnitudes on implant supported canine retraction /  
 تأثير مقدار قوتين على معدل سحب الناب المدعوم بغرس مجهرى 
Sharif Mohammed Bushnaq ; Supervised Amr Abdelrehim Hussein Labib , Dalia Elboghdady  
 - Cairo :   Sharif Mohammed Bushnaq  ,   2013 
 - 100 P. :   charts , facsimiles ;   25cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Orthodontics 
<br/><br/> The aim of this clinical study was to compare the use of two  different force magnitudes (100 gm and 200 gm) with indirect mini-screw implant  anchorage, and evaluating the rate of canine movement, amount of molar  anchorage loss, canine disto-buccal rotation and canine mesio-distal tipping. Results: The amount of initial tooth movement (T0-T1) was not related to force  magnitude. However, during (T1-T2) and (T2-T3) periods, significant increase in  the amount and rate of tooth movement were found with 200 gm group than 100  gm group. Canine rotation, tipping and anchorage loss were significantly higher in  200 gm group than 100 gm group. Conclusion: Canine retraction proceeds at a  faster rate in 200 gm group. Indirect mini-screw anchorage was not effective in  preventing anchorage loss in both groups.   
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<br/><br/><label>Subjects--Index Terms: </label>Force magnitude Mini- screw  Rate of canine retraction