Influence of the restorative procedure factors on stress values in premolar with MOD cavity: a finite element study |
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| Authors: | Ivana Kantardžić Darko Vasiljević Ognjan Lužanin Tatjana Maravić Larisa Blažić |
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| Institution: | 1.School of Dentistry, Faculty of Medicine,University of Novi Sad,Novi Sad,Serbia;2.Photonics Centre, Institute of Physics,University of Belgrade,Belgrade,Serbia;3.Department of Production Engineering, Faculty of Technical Sciences,University of Novi Sad,Novi Sad,Serbia;4.Department of Biomedical and Neuromotor Sciences, DIBINEM,University of Bologna - Alma Mater Studiorum,Bologna,Italy;5.Department of Conservative Dentistry and Endodontics,Clinic of Dentistry of Vojvodina,Novi Sad,Serbia |
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| Abstract: | In order to investigate the influence of cusp reduction, cavity isthmus width, and restorative material on stress values in premolar with mesio-occlusal-distal (MOD) cavity, numerical simulations were done on three-dimensional (3D) models of a maxillary second premolar designed using computerized tomography (CT) scan images. The use of four restorative materials (direct resin composite, direct resin composite with resin-modified glass-ionomer cement as the base, indirect resin composite, ceramic), three cavity preparation designs (without cusp coverage, 2-mm palatal cusp coverage, 2-mm palatal and buccal cusp coverage), and two cavity isthmus widths (1/2 and 2/3 intercuspal width) were simulated. After applying a static load of 200 N on the occlusal surface of the tooth, von Mises stresses in the enamel, dentin, and restoration were calculated using finite element analysis (FEA). Stress values in the enamel were primarily influenced by cavity preparation design, while restorative material showed higher contribution in dentin. The lowest stress values were obtained in models with cusp coverage and indirect restorations. Cavity isthmus width had minimal influence on stress values in tooth structures. None of the investigated factors determined stress values in the restoration. In conclusion, the use of ceramic restoration covering both palatal and buccal cusp provided the most favourable stress distribution of premolars with MOD cavity. |
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