Numerical Three-dimensional Finite Element Modeling of Cavity Shape and Optimal Material Selection by Analysis of Stress Distribution on Class V Cavities of Mandibular Premolars

Pai, Swathi and Bhat, Vishal and Patil, Vatsala and Naik, Nithesh and Awasthi, Swetank and Nayak, Nithin (2020) Numerical Three-dimensional Finite Element Modeling of Cavity Shape and Optimal Material Selection by Analysis of Stress Distribution on Class V Cavities of Mandibular Premolars. Journal of International Society of Preventive and Community Dentistry, 10 (3). pp. 278-285. ISSN 22310762

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Abstract

Adhesive restoration does not depend primarily on the configuration of the shape of the cavity. Under varying loading conditions, it is essential to know the stress concentration and load transfer mechanism for distinct cavity shapes. The aim of this study was to evaluate and compare the biomechanical characteristics of various cavity shapes, namely oval, elliptical, trapezoidal, and rectangular shapes of class V cavities on mandibular premolars restored with amalgam, glass ionomer cement, and Cention N using three-dimensional (3D) finite element analysis. Materials and Methods: A 3D prototype of a mandibular premolar was generated by Digital Imaging and Communications in Medicine (DICOM) images obtained from the cone beam computed tomography and imported to 3D modeling software tool, SpaceClaim. The four distinct load magnitudes of 100, 150, 200, and 250N were applied as a pressure load perpendicular to the lingual plane of the lingual cusp of the occlusal surface (normal load) and at 45° to same (oblique load). The stress distribution patterns and the maximum von Mises stresses were analyzed and compared. Results: The occlusal stresses were distributed from the force loading point in an approximate actinomorphic pattern, and when the force load was close to the margin, the stress was much greater. Conclusion: Ovoid cavity showed lesser stress concentration and deformation for each of the tested restorative material.

Item Type: Article
Uncontrolled Keywords: Cavity shapes, dental materials, dentistry, finite element analysis, restoration, Stress distribution
Subjects: Dentistry > MCODS Manipal > Conservative Dentistry and Endontics
Dentistry > MCODS Manipal > Oral Medicine and Radiology
Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 12 Nov 2020 04:54
Last Modified: 12 Nov 2020 04:54
URI: http://eprints.manipal.edu/id/eprint/155997

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