Document Details

Document Type : Thesis 
Document Title :
MICRO-COMPUTED TOMOGRAPHIC ANALYSIS OF MARTENSITIC PHASE SHAPERS OF THE ROOT CANAL SYSTEM
دراسة تحليلية باستخدام الأشعة المقطعية الدقيقة لتشكلات الأقنية اللبية المحضرة بمبارد ذات تركيب بلوري مارتنسيت
 
Subject : Faculty of Dentistry 
Document Language : Arabic 
Abstract : to compare the shaping ability of martensitic root canal instruments to the conventional austenitic in an ex-vivo model using micro-CT imaging technology. Methodology: twenty mandibular molars with two separate mesial canals (Vertucci Type IV) were collected from a pool of extracted teeth. The teeth were subjected to a first scan by micro-CT before biomechanical instrumentation to set a baseline for comparison. Then, forty mesial canals were randomly divided into two groups. Martensitic group prepared with One Curve (OC) and austenitic group prepared with One Shape (OS). After biomechanical instrumentation, all teeth were subjected to a second scan. Pre- and post-instrumentation micro-CT scans were evaluated using computer algorithms to compare changes in volume, surface area, Structure Model Index, thickness, untreated canal walls, and canal curvature straightening. Also, measurements of canal transportation were also compared in the coronal, middle, and apical thirds of the canal Results: both instruments produced significant changes in the basic root canal geometry with no preparation errors (paired t test P < 0.05). There were no statistically significant differences in the basic canal geometric parameters between OC and OS (independent samples t test P > 0.05). However, OC produced significantly less straightening to the canal curvature (independent samples t test P < 0.05) and produced significantly less transportation in the apical third (Mann-Whitney U test P < 0.05). Conclusion: Austenitic OS and martensitic OC root canal shapers prepared comparable shapes of the root canal system with no preparation errors. However, martensitic OC preparation respected the original root canal curvature anatomy and produced significantly less straightening and less canal transportation apically. 
Supervisor : Prof. Khaled Abdullah Balto 
Thesis Type : Master Thesis 
Publishing Year : 1441 AH
2020 AD 
Co-Supervisor : Dr. Loai Alsoufi 
Added Date : Tuesday, January 14, 2020 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
عبدالواحد محمد الغامديAlghamdi, Abdulwahed MohammedResearcherMaster 

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