Objectives of the study were to investigate biomechanical properties of severely compromised premolars restored with composite restorations using finite element analysis (FEA), and in vitro fracture resistance test. A 3-D model of an endodontically treated premolar was created in Solidworks. Different composite restorations were modelled (direct restoration-DR; endo-crown-EC; post, core, and crown-C) with two different supporting tissues: periodontal ligament/alveolar bone (B), and polymethyl methacrylate (PMMA). Models were two-point axially loaded occlusally (850 N). Von Mises stresses and strains were calculated. The same groups were further tested for static fracture resistance in vitro (n = 5, 6.0 mm-diameter ball indenter, vertical load). Fracture resistance data were statistically analyzed (p < 0.050). The highest stresses and strains in all FEA models were observed on occlusal and vestibular cervical surfaces, corresponding to fracture propagation demonstrated in vitro. C showed the lowest stress in dentin, while EC showed lower stresses and strains in crown cement. B models demonstrated larger high stress areas in the root than PMMA models. No significant differences in fracture resistance (N) were observed between groups (DR: 747.7 ± 164.0, EC: 867.3 ± 108.1, C: 866.9 ± 126.3; p = 0.307). More conservative restorations seem a feasible alternative for endodontically treated premolars to conventional post-core-crown.

Finite element and in vitro study on biomechanics behavior of endodontically treated premolars restored with direct or indirect composite restorations / Maravic, T; Comba, A; Mazzitelli, C; Bartoletti, L; Balla, I; di Pietro, E; Josic, U; Generali, L; Vasiljevic, D; Blazic, L; Breschi, L; Mazzoni, A. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 12:1(2022), pp. 1-11. [10.1038/s41598-022-16480-0]

Finite element and in vitro study on biomechanics behavior of endodontically treated premolars restored with direct or indirect composite restorations

Generali L;
2022

Abstract

Objectives of the study were to investigate biomechanical properties of severely compromised premolars restored with composite restorations using finite element analysis (FEA), and in vitro fracture resistance test. A 3-D model of an endodontically treated premolar was created in Solidworks. Different composite restorations were modelled (direct restoration-DR; endo-crown-EC; post, core, and crown-C) with two different supporting tissues: periodontal ligament/alveolar bone (B), and polymethyl methacrylate (PMMA). Models were two-point axially loaded occlusally (850 N). Von Mises stresses and strains were calculated. The same groups were further tested for static fracture resistance in vitro (n = 5, 6.0 mm-diameter ball indenter, vertical load). Fracture resistance data were statistically analyzed (p < 0.050). The highest stresses and strains in all FEA models were observed on occlusal and vestibular cervical surfaces, corresponding to fracture propagation demonstrated in vitro. C showed the lowest stress in dentin, while EC showed lower stresses and strains in crown cement. B models demonstrated larger high stress areas in the root than PMMA models. No significant differences in fracture resistance (N) were observed between groups (DR: 747.7 ± 164.0, EC: 867.3 ± 108.1, C: 866.9 ± 126.3; p = 0.307). More conservative restorations seem a feasible alternative for endodontically treated premolars to conventional post-core-crown.
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Finite element and in vitro study on biomechanics behavior of endodontically treated premolars restored with direct or indirect composite restorations / Maravic, T; Comba, A; Mazzitelli, C; Bartoletti, L; Balla, I; di Pietro, E; Josic, U; Generali, L; Vasiljevic, D; Blazic, L; Breschi, L; Mazzoni, A. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 12:1(2022), pp. 1-11. [10.1038/s41598-022-16480-0]
Maravic, T; Comba, A; Mazzitelli, C; Bartoletti, L; Balla, I; di Pietro, E; Josic, U; Generali, L; Vasiljevic, D; Blazic, L; Breschi, L; Mazzoni, A
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/1285164
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