Patient-specific Finite Element Analysis of Fiber Post and Ferrule Design
| Autor: | Roberto Sales Pessoa, Monise de Paula Rodrigues, Antheunis Versluis, Crisnicaw Veríssimo, Carlos José Soares, Priscilla Barbosa Ferreira Soares, Andréa Dollores Correia Miranda Valdivia |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
medicine.medical_treatment 0206 medical engineering Finite Element Analysis 02 engineering and technology Crown (dentistry) Stress (mechanics) 03 medical and health sciences 0302 clinical medicine stomatognathic system Incisor medicine von Mises yield criterion Humans Maxillary central incisor Composite material General Dentistry Strain gauge Orthodontics Tooth Nonvital Ferrule 030206 dentistry 020601 biomedical engineering Bite force quotient stomatognathic diseases medicine.anatomical_structure Post and Core Technique |
| Zdroj: | Journal of endodontics. 43(9) |
| ISSN: | 1878-3554 |
| Popis: | Introduction A ferrule on anterior endodontic-treated teeth has been evaluated using clinical trials, in vitro tests, and finite element analysis (FEA). The patient-specific FEA with a nonuniform ferrule and nonlinear contact biting load associated with clinical validation can be used to predict failure. Methods A patient was selected with both maxillary central incisors with different ferrule designs who received endodontic treatment and restoration using a fiber post, composite core, and computer aided design and computer aided manufacturing lithium disilicate ceramic crowns. Strain gauges were attached to the buccal surfaces of both teeth to record ceramic strain during bite force recording for FEA validation. Cone-beam computed tomographic imaging was performed, and the Digital Imaging and Communication in Medicine files were exported to Mimics, 3-Matic (Materialise, Leuven, Belgium) and Patran (MSC Software, Santa Ana, CA) software to create a patient-specific FEA model. Bite load was applied using contact load applied by antagonist teeth (155 N). Mechanical properties were obtained from the literature. Modified von Mises equivalent stress was used for stress evaluation. Results Stresses on the dentin and fiber post on the left incisor, which had a nonuniform ferrule, were higher compared with the right incisor. The strain values recorded for the right central incisor (strain gauge =79.9 ± 3.8 μS and FEA = 69.5 μS) and the left central incisor (strain gauge = 83.5 ± 5.3 μS and FEA = 73.9 μS) validate the FEA analysis. Conclusions FEA was validated with in vivo strain values measured at the buccal crown surfaces, supporting that the stress levels were realistic for investigation of the clinical performance of fiber posts. Maintaining a uniform ferrule was more favorable than a localized higher ferrule. |
| Databáze: | OpenAIRE |
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