材料科学
断裂(地质)
复合材料
根管
口腔正畸科
有限元法
牙科
词根(语言学)
结构工程
作者
Shihab Romeed,Stephen Dunne,Ahmad A. Madarati
出处
期刊:The European journal of prosthodontics and restorative dentistry
日期:2012-06-01
卷期号:20 (2): 86-91
被引量:3
标识
DOI:10.1922/ejprd_1069romeed06
摘要
This study investigated by means of finite element analysis the influence of fractured file removal on root fracture resistance in an endodontically-treated canine. A 4mm fragment of an endodontic file was deliberately fractured in the apical third of an upper canine root and removed by ultrasonic tips. Micro-computed tomography scans were carried out before and after fractured file removal on the same tooth. Two 3D-FE models (before and after file removal) were subjected to 100N loading. Results indicate that the fractured file removal increased von Mises stresses by 55%. Peak stresses were located around the root filling/dentine interface prior to file removal. Following file removal, peak stresses were concentrated at the buccal root surface/bone interface that might initiate vertical root fracture buccolingually.
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