, Saad Al-Nazhan2
, Nassr Al-Maflehi3
, Mazen A. Aldosimani4
, Mohammed Nabil Zahid5
, Ghadeer N. Shihabi6
1Dental Department, Ministry of Health Endodontist, Huraymala General Hospital, Riyadh, Saudi Arabia. JFIF d d Ducky d qhttp://ns.adobe.com/xap/1.0/