Document Details

Document Type : Thesis 
Document Title :
EFFECT OF IRRIGATION SOLUTIONS ON THE SURFACE CHARACTERISTIC AND THE CYCLIC FATIGUE RESISTANCE OF A NOVEL RECIPROCATING FILE
تأثير محاليل غسيل قنوات الجذور المستخدمة أثناء المعالجات اللبية على السمة السطحية ومقاومة الإنهاك الدوري لمبرد جديد ذو تصميم مبتكر ويتحرك بحركة ترددية
 
Subject : Faculty of Dentistry 
Document Language : Arabic 
Abstract : The objectives of this study were two parts; part I was to measure the cyclic fatigue resistant of RECIPROC blue (RCB) and RECIPROC (RC) NiTi files in water, 5.25% sodium hypochlorite (NaOCl) and 17% ethylenediaminetetraacetic acid (EDTA) at room temperature 24°C (control), 37°C and 45°C. Part II was to assess the surface changes in RCB and RC after ten minutes immersion in water, 5.25% NaOCl and 17% EDTA at 37°C and 45°C.Materials and methods:The first part of the study utilized a total of 144 (RCB & RC) NiTi files that were examined by three Stainless Steel (SS) pins model to determine number of cycles to failure (NCF). Files were divided into 6 groups (n=24) according to selected temperature and solution for each reciprocating system.The second part include Atomic Force Microscope (AFM) scan in which total of 8 files divided into 4 groups (n=2) each sample have 5 scans to measure root mean square (Sq) and mean roughness (Sa) in nanometers.Results At 24°C control group had significantly the highest NCF compared to all the groups (P <0.05). NCF was significantly reduced (P <0.05) with increase of temperature for both reciprocating systems, regardless to the solutions used (P>0.05). In addition, RCB had significantly higher NCF than RC (P <0.05). Sa and Sq significantly increased by immersion in 5.25% NaOCl and by its temperature rise (P<0.05) for both systems. Immersion in 17% EDTA had minimal effect on Sq and Sa (P>0.05) for both systems at 37°C. RCB had significantly lower (Sa) and (Sq) value than RC (P< 0.05). Conclusion: It can be concluded that NCF was negatively affected by immersion as all immersion groups had statistically significant lower NCF compared to control،The impact of solution’s temperature on NCF was more significant than the solution type. RCB had better cyclic fatigue resistance than RC. Regarding surface changes, immersion in 5.25% NaOCl led to more surface roughness compared to 17% EDTA. 
Supervisor : Prof. Rajab Saif 
Thesis Type : Master Thesis 
Publishing Year : 1440 AH
2019 AD 
Co-Supervisor : Dr. Osama Alothmani 
Added Date : Monday, September 16, 2019 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
علي حسين آل سيفAlsaif, Ali HussainResearcherMaster 

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