Document Details

Document Type : Thesis 
Document Title :
Characterization Of The Differential Efficacy Of Austenitic Vs Martensitic NiTi Rotary Files In Non-Surgical Root Canal Retreatment: A Micro-CT Analysis.
تأثير معالجة الخواص الحرارية للمبارد في إزالة مواد الحشو لقنوات الجذور بواسطة الإشاعة المقطعية ثلاثية الأبعاد
 
Subject : Faculty of Dentistry 
Document Language : Arabic 
Abstract : The aim of this study: To characterize the differential efficacy of martensitic and austenitic files in root canal retreatment with regards to de-filling ability, debris management and morphometric features. Materials and Methods: A total of 10 human premolar teeth with two separate fully formed roots was selected, prepared with BioRace system (BR) up to a size BR2 (.04/25). Root canals were obturated and then divided into two groups (n = 10) according to the file type. In order to dissect out the differential effect of heated alloy, two geometrically identical files have been used with the only difference between them is heat treatment; one curve (OC) martensitic and one shape (OS) austenitic. The specimens were scanned preoperatively and postoperatively by using Micro-Computed Tomography (Micro-CT), and the percent volume of residual filling materials was calculated. Canals reshaping and remaining debris in the canals were assessed by calculating the difference be-tween pre and post volume of the canals using Micro-CT software. Result: The percentages of removed filling materials were similar between both groups. OS was significantly faster than OC (P < .05). Retreatment procedure did not significantly change volume, surface area, structure model index and canal curvature. OS group showed significantly more transportation compared with those in OC group at the apical third (P < .05) There were no significant differences between both groups concerning un-instrumented surface area and accumulated hard tissue debris (P > .05). Conclusions: Neither file systems could completely remove the filling materials. However, OC resulted in less transportation than OS in the apical one third (P < .05). Also, OC resulted less AHTD than OS but with no statistical difference. 
Supervisor : Prof. Khaled Balto 
Thesis Type : Master Thesis 
Publishing Year : 1441 AH
2020 AD 
Added Date : Friday, June 12, 2020 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
وائل هشام راجخانRajkhan, Wael ResearcherMaster 

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