Rasha Ramadan Basheer <br/><br/>
The effect of bleaching with hydroxyapatite on human enamel /  
 تأثير التبيض بالهيدروكسى أباتيت على ميناء الاسنان الآدمية 
Rasha Ramadan Basheer ; Supervised Mohamed Riad Farid , Faten Mohamed Kamel , Rania Sayed Mosallam 
 - Cairo :   Rasha Ramadan Basheer ,   2011 
 - 117Leaves :   charts , facsimiles ;   30cm 
<br/><br/>Thesis (Ph.D.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Operative Dentistry 
<br/><br/> This in vitro study was designed to investigate the effect of bleaching with hydroxyapatite material on human enamel . A total of 240 intact non carious human premolars were used . Enamel blocks of uniform dimensions (4mmX 4mm X3mm) were prepared . The dental blocks were randomly divided into two equal groups (n=120) , according to the applicarion of the bleaching agent 
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<br/><br/><label>Subjects--Index Terms: </label>Bleaching  Color change  Whitening