3-d finite element analysis of the effects of post location and loading location on stress distribution in root canals of the mandibular 1st molar

Hong Gi Yoon, Hyun Keun Oh, Dong Yul Lee, Joo Hee Shin

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    Objective: The purpose of this study was to evaluate, by using finite element analysis, the influence of post location and occlusal loading location on the stress distribution pattern inside the root canals of the mandibular 1st molar. Material and Methods: Three different 3-D models of the mandibular 1st molar were established: no post (NP) – a model of endodontic and prosthodontic treatments; mesiobuccal post (MP) – a model of endodontic and prosthodontic treatments with a post in the mesiobuccal canal; and distal post (DP) – a model of endodontic and prosthodontic treatments with a post in the distal canal. A vertical force of 300 N, perpendicular to the occlusal plane, was applied to one of five 1 mm2 areas on the occlusal surface; mesial marginal ridge, distal marginal ridge, mesiobuccal cusp, distobuccal cusp, and central fossa. Finite element analysis was used to calculate the equivalent von Mises stresses on each root canal. Results: The DP model showed similar maximum stress values to the NP model, while the MP model showed markedly greater maximum stress values. The post procedure increased stress concentration inside the canals, although this was significantly affected by the site of the force. Conclusions: In the mandibular 1st molar, the distal canal is the better place to insert the post than the mesiobuccal canal. However, if insertion into the mesiobuccal canal is unavoidable, there should be consideration on the occlusal contact, making central fossa and distal marginal ridge the main functioning areas.

    Original languageEnglish
    Article numbere20160406
    JournalJournal of Applied Oral Science
    Volume26
    DOIs
    Publication statusPublished - 2018

    Keywords

    • Finite element analysis
    • Molar
    • Post
    • Stress

    ASJC Scopus subject areas

    • Dentistry(all)

    Fingerprint

    Dive into the research topics of '3-d finite element analysis of the effects of post location and loading location on stress distribution in root canals of the mandibular 1<sup>st</sup> molar'. Together they form a unique fingerprint.

    Cite this