A Comparative Evaluation of Effect of Different Ferrule Heights on Stress Distribution in Endodontically Treated Teeth Restored with Zirconia Post and Core System using 3D-Finite Element Analysis
| Autor: | vidya satish gatkal, AJIT JANKAR, varsha vaijnath joteppa, ASIM ZAFAR, PRASHANT NAKADE, MADHURI WADHWANI |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of Clinical and Diagnostic Research, Vol 15, Iss 12, Pp 22-28 (2021) |
| Druh dokumentu: | article |
| ISSN: | 2249-782X 0973-709X |
| DOI: | 10.7860/JCDR/2021/51818.15785 |
| Popis: | Introduction: Customised Zirconia postcore exhibits high strength, toughness and superior aesthetics. The stress distribution in the root of endodontically treated teeth has been found to improve with use of ferrule. Aim: To evaluate the effect of different ferrule heights on stress distribution in endodontically treated maxillary central incisor restored with zirconia postcore system using three-dimensional (3D) finite element analysis. Materials and Methods: The in-vitro experimental study was conducted at Maharashtra Institute of Dental Sciences and Research, Latur, Maharashtra, India, from December 2014 to July 2016. The external shape of the right maxillary central incisor was obtained by the micro computed tomography scan of previously extracted maxillary central incisor. The scanned profiles were then assembled and a 3D-finite element model of five dentin ferrule heights was designed with customised zirconia postcore (1.2 mm diameter) and all ceramic crown. Total five models of different ferrule heights (0 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm) were made. Von mises stress was determined by applying a load of 100 N at 45° and at a distance of 2 mm from the incisal edge on the palatal surface of crown. Descriptive statistical methods and Pearson correlation test were used to analyse the data. Results: The maximum von Mises stress at the postdentin interface decreased from 2.808 MPa to 0.512 MPa and that of zirconia post reduced from 57.163 MPa to 48.29 MPa when the ferrule height increased from 0 to 2 mm. The maximum von Mises stress in the radicular dentin decreased from 15.219 MPa to 11.321 MPa. Conclusion: There was association between increased height of ferrule and reduced von Mises stress in the zirconia post, postdentin interface and in remaining radicular dentin. Also, with increase in height of ferrule there was an evident shift of von mises stress to the cervical end of root from midroot and apical end of root. |
| Databáze: | Directory of Open Access Journals |
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