دورية أكاديمية
Effects of non-carious cervical lesions and coronary structure loss association on biomechanical behavior of maxillary premolars
| العنوان: | Effects of non-carious cervical lesions and coronary structure loss association on biomechanical behavior of maxillary premolars |
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| المؤلفون: | Soares, Paulo Vinícius, Souza, Paola Gomes, Souza, Sônia Cristina, Gonzaga, Ramon Corrêa de Queiroz, Faria, Vitor Laguardia Guido, Naves, Marina Ferreira de Lima, Zeola, Livia Fávaro, Machado, Alexandre Coelho, Pereira, Analice Giovani |
| المصدر: | Journal of Research in Dentistry; v. 1, n. 2 (2013); 140-153 ; 2317-5907 |
| بيانات النشر: | Universidade do Sul de Santa Catarina |
| سنة النشر: | 2013 |
| المجموعة: | Portal de Periódicos Unisul (Universidade do Sul de Santa Catarina) |
| مصطلحات موضوعية: | Dentistry, Non-carious cervical lesion, Dental preparation, Composite resin, Finite element analysis |
| الوصف: | Introduction: Dental lesions and cavity preparations can impact the biomechanical behavior of teeth due to tooth structure loss. Objective: Analyze the influence of tooth structure loss associated to non-carious cervical lesions (NCCLs) and coronary preparations on biomechanical behavior of maxillary premolars, restored or not, using finite element analysis (FEA). Material and methods: Virtual models were generated using a longitudinal cut image of a maxillary premolar, exported to a finite element software (Ansys 12.0) and analyzed as follows: sound tooth (S); MOD preparation (P); MOD preparation restored with composite resin (PR); cervical lesion (L); cervical lesion restored with composite resin (LR); and combinations, PR+LR; P+L; PR+L; P+LR. The areas corresponding to each structure were plotted and then meshed with eight-node isoparametric plane elements (PLANE183) in accordance to mechanical properties of each structure and materials. The materials and structures were assumed elastic, isotropic, homogeneous and linear, except for enamel and dentin, considered orthotropic. Oblique load (45N) was applied on buccal and palatal cusps, simulating an experimental tooth-sphere contact. Von Mises (VM) and maximum principal stress (S1) criteria were applied for analyzing the results. Results: FEA using VM criterion revealed similar stress distribution patterns for groups S, PR, LR and PR+LR. Models L, P+L, P+LR and PR+L presented the highest stress at the center of NCCLs, with S1 levels of 0.22, 0.2, 0.25 and 0.31 MPa, respectively. For groups P and P+LR, Von Mises stress concentration was observed at internal angles of preparation and at base of cusps. Conclusion: NCCLs and intracoronal structure loss associated promoted high stress concentration in dental structure and at center of lesion. The load application influenced the stress distribution, and the models of groups restored with composite resin tend to mimic the biomechanical behavior of sound tooth model. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://portaldeperiodicos.unisul.br/index.php/JR_Dentistry/article/view/1519/1258Test; https://portaldeperiodicos.unisul.br/index.php/JR_Dentistry/article/view/1519Test |
| DOI: | 10.19177/jrd.v1e22013140-153 |
| الإتاحة: | https://doi.org/10.19177/jrd.v1e22013140-153Test https://portaldeperiodicos.unisul.br/index.php/JR_Dentistry/article/view/1519Test |
| حقوق: | Direitos autorais 2016 Journal of Research in Dentistry |
| رقم الانضمام: | edsbas.E008EE0D |
| قاعدة البيانات: | BASE |
| DOI: | 10.19177/jrd.v1e22013140-153 |
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