真实牙根管冲洗过程的数值模拟  

NUMERICAL SIMULATION OF IRRIGATION PROCESS IN REAL ROOT CANAL

作　　者：黄正秋 于明州 周娜[2,3] 金晗辉[4] HUANG Zhengqiu;YU Mingzhou;ZHOU Na;JIN Hanhui(College of Mechanical and Electrical Engineering,China Jiliang University,Hangzhou 310018,China;The Affiliated Hospital of Stomatology,School of Stomatology,Zhejiang University School of Medicine,Hangzhou 310006,China;Zhejiang University School of Stomatology,Key Laboratory of Oral Biomedical Research of Zhejiang Province,Hangzhou 310006,China;School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]中国计量大学机电工程学院,杭州310018 [2]浙江大学医学院附属口腔医院,杭州310006 [3]浙江省口腔生物医学研究重点实验室,浙江大学口腔医学院,杭州310006 [4]浙江大学航空航天学院,杭州310027

出　　处：《力学与实践》2021年第3期386-392,共7页Mechanics in Engineering

基　　金：浙江省自然科学基金(LQ19H140005,LR16A020002);国家自然科学基金(11872353)资助项目。

摘　　要：采用计算流体力学方法研究在真实人体牙根管的清洗过程中的根管内部流场特性,针对重建后的真实人体根管模型和30 g平头针,评估了冲洗液不同冲洗流速和针头不同工作深度对根管内流动形态、速度、壁面剪切应力和顶端压力的影响。结果表明:在真实人体根管中,持续增加冲洗液流速并不能对冲洗效果产生显著的提升效果,却会大幅提高顶端压力提升造成的挤压风险。工作深度与冲洗置换能力不是线性关系,适当的工作深度不仅具有最好的冲洗液置换效果,而且能降低顶端平均压力;而过大的工作深度对根管冲洗效果有着负面影响。The computational fluid dynamics is used to investigate the flow field inside the real root canal during the irrigation,to evaluate the irrigation efficiency,as well as the effects of the irrigating fluid velocity and the working length on the flow pattern,the velocity,the shear stress and the apical pressure of the irrigating fluid.The real human root canal model and a 30 g flat head needle are adopted in the numerical simulation.It is shown that increasing the inflow velocity can not significantly improve the irrigation efficiency,but the risk of the apical extrusion is increased greatly because of the increase of the apical pressure.The working length can not always improve the displacement ability.An appropriate working length can be adopted to obtain the best displacement,together with the low apical pressure.Excessive increase of the working length might decrease the displacement and the shear stress on the wall,with a reduced irrigation efficiency.

关 键 词：计算流体力学 根管冲洗 真实牙根管 流速 工作深度 

分 类 号：O368[理学—流体力学] R781.3[理学—力学]