{"title":"Irrigation Dynamics of the TruNatomy Needle in a Minimally Prepared Root Canal: A Computational Fluid Dynamics Analysis.","authors":"Selventhra Savitha, Vijay Kumar, Sidhartha Sharma, Amrita Chawla, Ajay Logani","doi":"10.1111/aej.70120","DOIUrl":null,"url":null,"abstract":"<p><p>This study investigated the irrigation dynamics of the TruNatomy irrigation needle in a minimally shaped root canal using Computational Fluid Dynamics (CFD). The root canal geometry of an extracted maxillary first molar was reconstructed via micro-Computed Tomography (CT) scan, and the needle dimensions were obtained through stereomicroscopic analysis for Computer-Aided Design (CAD) modelling. The needle was virtually placed 1 mm short of the working length, and a prevalidated CFD model simulated the irrigation process. Irrigant penetration was confined to the needle tip, with a maximum velocity of 4.6 m/s. Wall shear stress of 340 Pa exceeded the threshold for effective debridement, and an apical pressure of 8.4 kPa was recorded at the apical wall. The TruNatomy needle produced uniform, low-magnitude wall shear stress along the lateral vent-facing canal walls, with limited apical irrigant exchange.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":" ","pages":""},"PeriodicalIF":1.7000,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Australian Endodontic Journal","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1111/aej.70120","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
引用次数: 0
Abstract
This study investigated the irrigation dynamics of the TruNatomy irrigation needle in a minimally shaped root canal using Computational Fluid Dynamics (CFD). The root canal geometry of an extracted maxillary first molar was reconstructed via micro-Computed Tomography (CT) scan, and the needle dimensions were obtained through stereomicroscopic analysis for Computer-Aided Design (CAD) modelling. The needle was virtually placed 1 mm short of the working length, and a prevalidated CFD model simulated the irrigation process. Irrigant penetration was confined to the needle tip, with a maximum velocity of 4.6 m/s. Wall shear stress of 340 Pa exceeded the threshold for effective debridement, and an apical pressure of 8.4 kPa was recorded at the apical wall. The TruNatomy needle produced uniform, low-magnitude wall shear stress along the lateral vent-facing canal walls, with limited apical irrigant exchange.
期刊介绍：
The Australian Endodontic Journal provides a forum for communication in the different fields that encompass endodontics for all specialists and dentists with an interest in the morphology, physiology, and pathology of the human tooth, in particular the dental pulp, root and peri-radicular tissues.
The Journal features regular clinical updates, research reports and case reports from authors worldwide, and also publishes meeting abstracts, society news and historical endodontic glimpses.
The Australian Endodontic Journal is a publication for dentists in general and specialist practice devoted solely to endodontics. It aims to promote communication in the different fields that encompass endodontics for those dentists who have a special interest in endodontics.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
