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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/25188

Title: Root Canal Irrigation - An Engineering Analysis Using Computational Fluid Dynamics
Authors: Kocharian, Tikran
Advisor: Bussmann, Markus
Keywords: root canal irrigation
computational fluid dynamics
Issue Date: 23-Nov-2010
Abstract: Abstract Aim: Despite more than a century of technological improvements in root canal procedures, clinical studies indicate that bacteria remain in the canal following standardized cleaning and shaping procedures using irrigants. The most common method of evaluating root canal bacteria assesses growth from paper point samples [1], in effect measuring what is removed from the root canal rather than what remains behind. Many studies have attempted to determine the efficacy of chemical and mechanical debridement during endodontic therapy [2]. In the present study, computational fluid dynamics is utilized to study the velocity distribution of irrigant flow in the root canal, wall flow pressure, and wall shear stress on the root-canal wall, which are difficult to measure in vivo because of the microscopic size of the root canals. Methodology: Computational Fluid Dynamics was used to evaluate and predict regions of fast and slow flow formation and the overall effectiveness of irrigation during non-surgical root canal therapy. Simulations were set using ICEM CFD 12.1 for meshing and FLUENT 12.1.4.The flow analyses were conducted for two real-life clinical mass flow rates of irrigants (0.15 and 0.30 mL/sec) and two conditions of irrigation needle inside the root canal (3 mm and 2 mm short of the bottom of the root canal). (iii) Results: Contours of the Dynamic pressure and Wall shear stress (WSS) along the root canal and velocity magnitude with velocity vectors at different cross section locations were obtained and discussed. Conclusion : Changes in irrigant flow rate and the irrigant needle insertion inside the root canal influence flow velocity, wall shear stress and the dynamic pressure. In addition, existence of weak wall shear stress values in the apical third of the root canal was confirmed. Computational Fluid Dynamics could be a valuable tool in assessing the further implications of additional model considerations on all important parameters for the effectiveness and safety of root canal therapy.
Description: Supervisor: Prof. M. Bussmann
URI: http://hdl.handle.net/1807/25188
Appears in Collections:Master of Engineering (M.Eng.) project reports

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