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

Autor: Maravić T; Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, Bologna, 40125, Italy.; Faculty of Medicine Novi Sad, University of Novi Sad, Hajduk Veljkova 2, Novi Sad, 21000, Serbia., Comba A; Department of Surgical Sciences, University of Turin, Via Nizza 230, Turin, 10126, Italy., Mazzitelli C; Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, Bologna, 40125, Italy., Bartoletti L; Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, Bologna, 40125, Italy., Balla I; Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, Bologna, 40125, Italy., di Pietro E; Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, Bologna, 40125, Italy., Josić U; Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, Bologna, 40125, Italy.; Clinic for Pediatric and Preventive Dentistry, School of Dental Medicine, University of Belgrade, Dr Subotica 15, Belgrade, 11000, Serbia., Generali L; Unit of Dentistry and Oral-Maxillo-Facial Surgery, Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Via del Pozzo 71, Modena, 41125, Italy., Vasiljević D; Instutute of Physics, University of Belgrade, Pregrevica 118, Belgrade, 11000, Serbia., Blažić L; Faculty of Medicine Novi Sad, University of Novi Sad, Hajduk Veljkova 2, Novi Sad, 21000, Serbia., Breschi L; Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, Bologna, 40125, Italy. lorenzo.breschi@unibo.it., Mazzoni A; Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, Bologna, 40125, Italy.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2022 Jul 25; Vol. 12 (1), pp. 12671. Date of Electronic Publication: 2022 Jul 25.
DOI: 10.1038/s41598-022-16480-0
Abstrakt: 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.
(© 2022. The Author(s).)
Databáze: MEDLINE
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