Effectiveness of different irrigation protocols in removing calcium hydroxide from simulated internal root resorptions
department or school: Dentistry, Faculty of
data provider: DSpace
degree campus: UBCV
creator: Fedorova, Ksenia
issued: 2022-07-27T17:35:00Z
issued: 2022
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: Introduction: Calcium hydroxide removal from internal inflammatory root resorptions (IRR) is challenging and many different irrigation techniques have been proven ineffective in clearing this medicament completely. Objective: The aim of this study was to compare the effectiveness of different irrigation methods in removing calcium hydroxide in the 3D printed molar tooth model including deep and shallow internal resorptions. Hypotheses: The presence, depth and location of resorption, irrigation method and composition of calcium hydroxide (Ca(OH)₂) do not affect the effectiveness of Ca(OH)₂ removal by different irrigation devices. Methods: 3D printed transparent models with artificial IRR cavities were designed, printed and filled with UltraCal XS or Multi-Cal calcium hydroxide paste. Apices and side vents were sealed with SoundSeal material. Open-ended needle irrigation (ONI) at 5 ml/L and 15 ml/min, double-side-vented needle irrigation (DNI) at 5 ml/min, EndoActivator (EA), PiezoFlow (PF) at 15 ml/min and GentleWave system (GW) with distilled water as irrigant were used to remove Ca(OH)₂ from the root canal system and resorptions at manufacturer recommended maximum irrigation times. 36 groups (n=10) were established. Ca(OH)₂ removal was assessed visually under 4.2 x magnification on dental operating microscope (DOM). The data were statistically analyzed by Chi-Square, Fisher’s exact test, independent t-test and binary logistic regression analysis, with the significance level set at 5%. Results: Bivariate analyses found statistically significant outcome associations with presence, location and depth of resorption, type of irrigation and type of Ca(OH)₂. Binary logistic regression models showed that Ca(OH)₂ removal was associated with four predictors: type of Ca(OH)₂ (OR = 2.022; 95% CI, 1.245 – 3.285), use of GW as irrigation method (OR = 99.502; 95% CI, 44.928-202.348), location of resorption (OR = 1.441; 95% CI, 1.082 – 1.918) and reverse resorption type (OR = 8.77…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/82208
note: EFFECTIVENESS OF DIFFERENT IRRIGATION PROTOCOLS IN REMOVING CALCIUM HYDROXIDE FROM SIMULATED INTERNAL ROOT RESORPTIONS by Ksenia Fedorova BDent (Hons), The University of Sydney, 2011 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in THE FACULTY OF GRADUATE AND POSTDOCTORAL STUDIES (Craniofacial Science) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) July 2022 © Ksenia Fedorova, 2022 ii The following individuals certify that they have read, and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, a thesis entitled: Effectiveness of different irrigation protocols in removing calcium hydroxide from simulated internal root resorptions submitted by Ksenia Fedorova in partial fulfillment of the requirements for the degree of Master of Science in Craniofacial Science Examining Committee: Dr. Markus Haapasalo, Professor, Department of Oral Biological & Medical Sciences, UBC. Supervisor Dr. Ya Shen, Professor, Department of Oral Biological & Medical Sciences, UBC. Supervisory Committee Member Dr. Ahmed Hieawy, Clinical Associate Professor, Department of Oral Biological & Medical Sciences, UBC. Supervisory Committee Member Dr. Ricardo M. Carvalho, Professor, Department of Oral Biological & Medical Sciences, UBC. Additional Examiner iii Abstract Introduction: Calcium hydroxide removal from internal inflammatory root resorptions (IRR) is challenging and many different irrigation techniques have been proven ineffective in clearing this medicament completely. Objective: The aim of this study was to compare the effectiveness of different irrigation methods in removing calcium hydroxide in the 3D printed molar tooth model including deep and shallow internal resorptions. Hypotheses: The presence, depth and location of resorption, irrigation method and composition of calcium hydroxide (Ca(OH)2) do not affect the effectiveness of Ca(OH)2 removal by different irrigation devices. Methods: 3D printed transparent …
has type: Thesis/Dissertation
date issued: 2022-11
is shown at: 10.14288/1.0416407
language: eng
degree discipline: Craniofacial Science
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Haapasalo, M. (Markus)
type: Text
identifier URI: http://hdl.handle.net/2429/82208