Effect of different restorative crown design and materials on stress distribution in endodontically treated molars: a finite element analysis study
Abstract Background The purposes of this simulation study were to evaluate the stresses in the roots of endodontically treated molars with extensive coronal tissue loss which were restored by endocrowns (all-in-one core and crown) and traditional crowns with post-cores, during masticatory simulation...
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| Format: | Article |
| Language: | English |
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BMC
2020-08-01
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| Series: | BMC Oral Health |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s12903-020-01214-3 |
| _version_ | 1811322954757177344 |
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| author | Jie Lin Zhenxiang Lin Zhiqiang Zheng |
| author_facet | Jie Lin Zhenxiang Lin Zhiqiang Zheng |
| author_sort | Jie Lin |
| collection | DOAJ |
| description | Abstract Background The purposes of this simulation study were to evaluate the stresses in the roots of endodontically treated molars with extensive coronal tissue loss which were restored by endocrowns (all-in-one core and crown) and traditional crowns with post-cores, during masticatory simulation using finite element analysis. Methods A mesio-distal cross-section of a lower right first molar was digitized and used to create 2-dimensional models of the teeth and supporting tissue; different crown designs, viz., endocrown with 2 mm occlusal clearance, endocrown with 4 mm occlusal clearance and post-core crown; different crown materials, viz., zirconia (Zr) and lithia-disilicate reinforced glass ceramic (LDRGC), and different post and core materials, viz., glass fiber (GF), stainless steel (SS) and metal cast (MC). An axial load of 600 N was applied to the central fossa of occlusal surface. Results The stress distributions were similar between Zr and LDRGC for periodontal ligament and alveolar bone. The root canal inner wall maximum principal stresses of SS post (70.8 MPa) and MC post (71.4 MPa) were higher than that of GF post (36.0 MPa) and endocrown (2.4 MPa). Conclusion The endocrowns reduced stress concentration for the root canal inner wall in comparison with the conventional post-core crown. Molars restored with endocrowns are less prone to root fracture than those with posts. |
| first_indexed | 2024-04-13T13:45:26Z |
| format | Article |
| id | doaj.art-3611d4489b6c41c79680d224e3f36cc4 |
| institution | Directory Open Access Journal |
| issn | 1472-6831 |
| language | English |
| last_indexed | 2024-04-13T13:45:26Z |
| publishDate | 2020-08-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Oral Health |
| spelling | doaj.art-3611d4489b6c41c79680d224e3f36cc42022-12-22T02:44:29ZengBMCBMC Oral Health1472-68312020-08-012011810.1186/s12903-020-01214-3Effect of different restorative crown design and materials on stress distribution in endodontically treated molars: a finite element analysis studyJie Lin0Zhenxiang Lin1Zhiqiang Zheng2Fujian Key Laboratory of Oral Diseases, School and Hospital of Stomatology, Fujian Medical UniversityDepartment of Stomatology, Hospital of Fujian Provincial AuthoritiesFujian Key Laboratory of Oral Diseases, School and Hospital of Stomatology, Fujian Medical UniversityAbstract Background The purposes of this simulation study were to evaluate the stresses in the roots of endodontically treated molars with extensive coronal tissue loss which were restored by endocrowns (all-in-one core and crown) and traditional crowns with post-cores, during masticatory simulation using finite element analysis. Methods A mesio-distal cross-section of a lower right first molar was digitized and used to create 2-dimensional models of the teeth and supporting tissue; different crown designs, viz., endocrown with 2 mm occlusal clearance, endocrown with 4 mm occlusal clearance and post-core crown; different crown materials, viz., zirconia (Zr) and lithia-disilicate reinforced glass ceramic (LDRGC), and different post and core materials, viz., glass fiber (GF), stainless steel (SS) and metal cast (MC). An axial load of 600 N was applied to the central fossa of occlusal surface. Results The stress distributions were similar between Zr and LDRGC for periodontal ligament and alveolar bone. The root canal inner wall maximum principal stresses of SS post (70.8 MPa) and MC post (71.4 MPa) were higher than that of GF post (36.0 MPa) and endocrown (2.4 MPa). Conclusion The endocrowns reduced stress concentration for the root canal inner wall in comparison with the conventional post-core crown. Molars restored with endocrowns are less prone to root fracture than those with posts.http://link.springer.com/article/10.1186/s12903-020-01214-3Finite element analysisEndocrownPost-core crownFiber postZirconia |
| spellingShingle | Jie Lin Zhenxiang Lin Zhiqiang Zheng Effect of different restorative crown design and materials on stress distribution in endodontically treated molars: a finite element analysis study BMC Oral Health Finite element analysis Endocrown Post-core crown Fiber post Zirconia |
| title | Effect of different restorative crown design and materials on stress distribution in endodontically treated molars: a finite element analysis study |
| title_full | Effect of different restorative crown design and materials on stress distribution in endodontically treated molars: a finite element analysis study |
| title_fullStr | Effect of different restorative crown design and materials on stress distribution in endodontically treated molars: a finite element analysis study |
| title_full_unstemmed | Effect of different restorative crown design and materials on stress distribution in endodontically treated molars: a finite element analysis study |
| title_short | Effect of different restorative crown design and materials on stress distribution in endodontically treated molars: a finite element analysis study |
| title_sort | effect of different restorative crown design and materials on stress distribution in endodontically treated molars a finite element analysis study |
| topic | Finite element analysis Endocrown Post-core crown Fiber post Zirconia |
| url | http://link.springer.com/article/10.1186/s12903-020-01214-3 |
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