Adnan Attas Hassan Alattas <br/><br/>
Comparison of portland cement versus MTA as retrograde filling materials using laser , ultrasonic and conventional root end cavity preparation :   An vitro study /  
 مقارنة الإسمنت البورتلاندى مقابل المينيرال ترايوكسي أجريجيت كمواد حشو فى قمة جذر السن بإستخدام الليزر والموجات الفوق صوتية والطرق التقليدية فى تحضير نهاية جذر التجويف السنى :   دراسة معملية 
Adnan Attas Hassan Alattas ; Supervied Hebatalla Mohamed Maged Elfar , Latifa Mohamed Abdelgawad 
 - Cairo :   Adnan Attas Hassan Alattas ,   2010 
 - 94Leaves :   charts , facsimiles ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Endodontics 
<br/><br/> The purpose of this study was to evaluate the sealing ability of Portland cement and MTA in comparison to amalgam as retrograde filling materials by utilizing three different root - end preparatory methods ( Laser , ultrasonic and conventional techiques ) . One hundred and twenty eight teeth were used divided into three main experimantal groups (n=36) : (1) diode laser preparation (L) (980nm 8 w\10 sec.)  
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<br/><br/><label>Subjects--Index Terms: </label>Diode laser   MTA  Portland cement