Stress Analyses of Retrograde Cavity Preparation Designs for Surgical Endodontics in the Mesial Root of the Mandibular Molar: A Finite Element Analysis—Part I

Sunil Kim, So Young Park, Yoon Lee, Chan Joo Lee, Bekir Karabucak, Hyeon Cheol Kim, Euiseong Kim

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Introduction: The aim of this study was to investigate the influence of various apical preparation designs for surgical endodontics on stress concentrations in the mesial root of the mandibular molar under different experimental conditions using finite element analysis. Methods: We designed 2 apical preparation groups according to whether an isthmus was present or not. Each group contained 4 subgroups according to the size of the apical preparation. We constrained the displacement of all nodes at the base of the supporting bone and applied a force of 150 N to the vertical axis. We analyzed stress generation and concentrations numerically for the groups and subgroups. Results: In the subgroups, the von Mises and maximum principal stresses reduced gradually according to the enlargement of the prepared cavity. However, when the preparation extended excessively in the isthmus preparation groups, the situation reversed (ie, both von Mises and maximum principal stresses increased). Conclusions: Within the limitations of this study, the apical preparation design influenced the distribution of stress concentration. Unlike the overall pattern in which stress decreased as the amount of apical preparation increased, stress increased when the amount of residual dentin was extremely thin.

Original languageEnglish
Pages (from-to)442-446
Number of pages5
JournalJournal of endodontics
Volume45
Issue number4
DOIs
Publication statusPublished - 2019 Apr

Bibliographical note

Funding Information:
Supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (grant no. NRF-2018R1D1A1A09081906 ).

Funding Information:
Supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (grant no. NRF-2018R1D1A1A09081906).

Funding Information:
Sunil Kim and So-Young Park contributed equally to this study. Supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (grant no. NRF-2018R1D1A1A09081906). The authors deny any conflicts of interest related to this study.

Publisher Copyright:
© 2019 American Association of Endodontists

All Science Journal Classification (ASJC) codes

  • Dentistry(all)

Fingerprint Dive into the research topics of 'Stress Analyses of Retrograde Cavity Preparation Designs for Surgical Endodontics in the Mesial Root of the Mandibular Molar: A Finite Element Analysis—Part I'. Together they form a unique fingerprint.

Cite this