Influence of restorative material and cement on the stress distribution of endocrowns: 3D finite element analysis
Abstract Purpose This study aimed to evaluate the influence of different types of restorative materials and resin cements on the stress distribution in the regions of the restoration, cement layer and dental remnant in endodontically treated posterior endocrowns. Methods A 3D finite element analysis...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2021-10-01
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| Series: | BMC Oral Health |
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| Online Access: | https://doi.org/10.1186/s12903-021-01865-w |
| _version_ | 1818930210096021504 |
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| author | Jiahui He Ziting Zheng Min Wu Chunqing Zheng Yuting Zeng Wenjuan Yan |
| author_facet | Jiahui He Ziting Zheng Min Wu Chunqing Zheng Yuting Zeng Wenjuan Yan |
| author_sort | Jiahui He |
| collection | DOAJ |
| description | Abstract Purpose This study aimed to evaluate the influence of different types of restorative materials and resin cements on the stress distribution in the regions of the restoration, cement layer and dental remnant in endodontically treated posterior endocrowns. Methods A 3D finite element analysis (FEA) model of the first mandibular molar that was restored with an endocrown designed by computer-aided design (CAD) software was generated. Three kinds of restorative materials (Vita Enamic (VE), IPS e.max CAD (EMX) and Grandio blocs (GR)) and two types of cementing materials (NX3 and Maxcem Elite Chroma (MX)) were analysed with such a model. The food layer was also designed before vertical (600 N) forces were applied to simulate physiological masticatory conditions. Thermal expansion was used to simulate the polymerization shrinkage effects of cement layers. The results were obtained by colorimetric graphs of the maximum principal stress in the restoration and tooth remnant. The failure risk of the cement layer was also calculated based on the normal stress. Results The elastic modulus was positively correlated with the tensile stress peak values in the restoration, mainly at the intaglio surface. However, in the cervical enamel and cement layer, restorative material with a higher elastic modulus generated lower peak stress values. The cement with a higher elastic modulus resulted in higher stress peak values inside the cement layer. The combination of EMX (restorative material) and NX3 (cement material) in the cement layer resulted in the lowest failure risk. Significance The ceramic material EMX with a higher elastic modulus appeared to be more effective at protecting the cement layer and residual enamel tissue. Based on the analysis of the failure risk of the cement layer, the combination of EMX and NX3 was recommended as an optional material for endocrowns for endodontically treated posterior teeth. |
| first_indexed | 2024-12-20T03:57:04Z |
| format | Article |
| id | doaj.art-9790961360ee44dc82f2b6d2d18dc212 |
| institution | Directory Open Access Journal |
| issn | 1472-6831 |
| language | English |
| last_indexed | 2024-12-20T03:57:04Z |
| publishDate | 2021-10-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Oral Health |
| spelling | doaj.art-9790961360ee44dc82f2b6d2d18dc2122022-12-21T19:54:16ZengBMCBMC Oral Health1472-68312021-10-012111910.1186/s12903-021-01865-wInfluence of restorative material and cement on the stress distribution of endocrowns: 3D finite element analysisJiahui He0Ziting Zheng1Min Wu2Chunqing Zheng3Yuting Zeng4Wenjuan Yan5Stomatology Health Care Center, Affiliated Shenzhen Maternity & Child Healthcare Hospital, Southern Medical UniversityNanfang Hospital, Southern Medical UniversityStomatology Health Care Center, Affiliated Shenzhen Maternity & Child Healthcare Hospital, Southern Medical UniversityNanfang Hospital, Southern Medical UniversityNanfang Hospital, Southern Medical UniversityNanfang Hospital, Southern Medical UniversityAbstract Purpose This study aimed to evaluate the influence of different types of restorative materials and resin cements on the stress distribution in the regions of the restoration, cement layer and dental remnant in endodontically treated posterior endocrowns. Methods A 3D finite element analysis (FEA) model of the first mandibular molar that was restored with an endocrown designed by computer-aided design (CAD) software was generated. Three kinds of restorative materials (Vita Enamic (VE), IPS e.max CAD (EMX) and Grandio blocs (GR)) and two types of cementing materials (NX3 and Maxcem Elite Chroma (MX)) were analysed with such a model. The food layer was also designed before vertical (600 N) forces were applied to simulate physiological masticatory conditions. Thermal expansion was used to simulate the polymerization shrinkage effects of cement layers. The results were obtained by colorimetric graphs of the maximum principal stress in the restoration and tooth remnant. The failure risk of the cement layer was also calculated based on the normal stress. Results The elastic modulus was positively correlated with the tensile stress peak values in the restoration, mainly at the intaglio surface. However, in the cervical enamel and cement layer, restorative material with a higher elastic modulus generated lower peak stress values. The cement with a higher elastic modulus resulted in higher stress peak values inside the cement layer. The combination of EMX (restorative material) and NX3 (cement material) in the cement layer resulted in the lowest failure risk. Significance The ceramic material EMX with a higher elastic modulus appeared to be more effective at protecting the cement layer and residual enamel tissue. Based on the analysis of the failure risk of the cement layer, the combination of EMX and NX3 was recommended as an optional material for endocrowns for endodontically treated posterior teeth.https://doi.org/10.1186/s12903-021-01865-w3D finite element analysisEndocrownCement layerSimulation of masticationEndodontically treated teeth |
| spellingShingle | Jiahui He Ziting Zheng Min Wu Chunqing Zheng Yuting Zeng Wenjuan Yan Influence of restorative material and cement on the stress distribution of endocrowns: 3D finite element analysis BMC Oral Health 3D finite element analysis Endocrown Cement layer Simulation of mastication Endodontically treated teeth |
| title | Influence of restorative material and cement on the stress distribution of endocrowns: 3D finite element analysis |
| title_full | Influence of restorative material and cement on the stress distribution of endocrowns: 3D finite element analysis |
| title_fullStr | Influence of restorative material and cement on the stress distribution of endocrowns: 3D finite element analysis |
| title_full_unstemmed | Influence of restorative material and cement on the stress distribution of endocrowns: 3D finite element analysis |
| title_short | Influence of restorative material and cement on the stress distribution of endocrowns: 3D finite element analysis |
| title_sort | influence of restorative material and cement on the stress distribution of endocrowns 3d finite element analysis |
| topic | 3D finite element analysis Endocrown Cement layer Simulation of mastication Endodontically treated teeth |
| url | https://doi.org/10.1186/s12903-021-01865-w |
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