Computational fluid dynamics analysis of the flow of four irrigations in root canal
10.3760/cma.j.issn.1002-0098.2015.06.007
- VernacularTitle:四种根管冲洗液在根管内流动的计算流体动力学分析
- Author:
Ying MA
1
;
Jialong HAN
;
Haiyan YU
;
Xiaochun WANG
Author Information
1. 150001,哈尔滨医科大学附属第四医院口腔科
- Keywords:
Root canal irrigants;
Dental pulp cavity;
Computational fluid dynamics
- From:
Chinese Journal of Stomatology
2015;50(6):352-357
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the flow of four irrigations in a root canal with different needle-insertion depth by using a computational fluid dynamics(CFD) model in order to provide a reference to the needle placement in clinical practice.Methods The density and viscosity of 5.25％ sodium hypochlorite (A),3％ sodium hypochlorite(B),17％ ethylenediaminetetraacetic acid (EDTA,C),2％ chlorhexidine(D) were measured.A CFD model by ICEM software was used to simulate irrigant flow from an open-ended flat needle positioned at the depth of 1,3,5 mm to the physiological apical within the root canal.Velocity,wall shear stress and pressure in the root canal were evaluated after setting the computing conditions with FLUENT 14.0 software.Results All the wall shear stress generated by four fluids was at peak when the needle was positioned 1 mm to the physiological apical,which were 6.72× 103 Pa(A),6.35× 103 Pa(B),7.47× 103 Pa(C),5.26× 103 Pa(D),respectively.With the distance increasing,wall shear stress gradually decreased.The wall shear stress of A,B,C,D was 2.31 × 103,2.05× 103,2.59× 103 and 1.81 × 103 Pa,respectively in 3 mm group.The wall shear stress of A,B,C,D was 2.16× 103,1.91 × 103,2.42× 103,1.71 × 103 Pa,respectively in 5 mm group.Conclusions It was recommended that the distance between the needle and physiological apical is 1-3 mm when flushing the root canal.The injection speed of 17％EDTA should be slower than that of the other three solutions.
