Dina Elsayed Ahmed Yussif Refai  <br/><br/>
Leakage assessment of cemented nickel chromium and milled titanium dowel systems /  
 تقييم تسريب الدعامات الجذرية الملصقة المصنعة من النيكل كروم و التيتانيوم المخروط 
Dina Elsayed Ahmed Yussif Refai ; Supervised jylan Fouad Elguindy , Zainab Nabil  
 - Cairo :   Dina Elsayed Ahmed Yussif Refai ,   2014 
 - 125 P. :   charts , facsimiles ;   25cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Prosthodontics 
<br/><br/> Purpose: The aim of the present study was to evaluate microleakage of cemented nickel Chromium and milled Titanium dowel systems cemented with three different luting agents. Materials and Methods: Two types of metallic posts (milled Ti and custom made NiCr) and three types of luting cements (Adhesor, Ketac cem and Rely X Unicem) were used. A total of 30 sound  upper central incisors were divided into two groups (15 for each post type). Each group was further subdivided according to type of cement used into three equal sub-groups (n=10 each). Sub group A: Posts cemented with zinc phosphate (Adhesor), Sub group B: Posts cemented with glass ionomer (Ketac cem), Sub group C: Posts cemented with adhesive resin cement (RelyX Unicem). All samples received 500 thermal cycles between 5C ± 4C and 60C ±4 C and then were immersed in 0.5% solution leishman dye for 24 hours at room temperature 
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<br/><br/><label>Subjects--Index Terms: </label>Dental cements  Microleakage  Milled Ti posts