Application of finite element model in implant dentistry: A systematic review

Reddy, Sesha; Sundram, Rajasekar; Abdemagyd, Hossam Abdelatty Eid

doi:10.4103/jpbs.jpbs_296_18

Cited by 56 publications

(55 citation statements)

References 34 publications

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“…In this context, finite element analysis (FEA) has been used successfully to investigate stress distribution in complex structures, such as restored human teeth. In the bioengineering field, the use of computer simulations is an important instrument to measure and test the best clinical option 5 . The use of FEA in dental rehabilitation improves the understanding of biomechanical behavior of different dental restoration materials and designs, and therefore the optimal approaches that are expected to provide better clinical performance 6,7 .…”

Section: Introductionmentioning

confidence: 99%

3D finite element model based on CT images of tooth

et al. 2020

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Aim: This study aimed the description of a protocol to acquire a 3D finite element (FE) model of a human maxillary central incisor tooth restored with ceramic crowns with enhanced geometric detail through an easy-to-use and low-cost concept and validate it through finite element analysis (FEA). Methods: A human maxillary central incisor was digitalized using a Cone Beam Computer Tomography (CBCT) scanner. The resulted tooth CBCT DICOM files were imported into a free medical imaging software (Invesalius) for 3D surface/geometric reconstruction in stereolithographic file format (STL). The STL file was exported to a computer-aided-design (CAD) software (SolidWorks), converted into a 3D solid model and edited to simulate different materials for full crown restorations. The obtained model was exported into a FEA software to evaluate the influence of different core materials (zirconia - Zr, lithium disilicate - Ds or palladium/silver - Ps) on the mechanical behavior of the restorations under a 100 N applied to the palatal surface at 135 degrees to the long axis of the tooth, followed by a load of 25.5 N perpendicular to the incisal edge of the crown. The quantitative and qualitative analysis of maximum principal stress (ceramic veneer) and maximum principal strain (core) were obtained. Results: The Zr model presented lower stress and strain concentration in the ceramic veneer and core than Ds and Ps models. For all models, the stresses were concentrated in the external surface of the veneering ceramic and strains in the internal surface of core, both near to the loading area. Conclusion: The described procedure is a quick, inexpensive and feasible protocol to obtain a highly detailed 3D FE model, and thus could be considered for future 3D FE analysis. The results of numerical simulation confirm that stiffer core materials result in a reduced stress concentration in ceramic veneer.

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Section: Introductionmentioning

confidence: 99%

3D finite element model based on CT images of tooth

et al. 2020

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“…The FEM is primarily a numerical method used to solve structural or non-structural problems utilizing an array of mathematicalbased calculations. 120,121 The method name comes from the fact that this method breaks down a larger and more complicated structure into smaller and more simple ones; the latter ones are called finite elements. The mathematical calculations that model these elements are solved and reassembled into a more extensive system of calculations that model the entire problem.…”

Section: Finite Element Methods (Fem)mentioning

confidence: 99%

“…Various types of laboratory tests were performed in previous studies to estimate the limit in which a restoration fails and the distribution of fatal stress within the restoration during loading. 119,120 Load to fracture mechanical test combined with artificial aging procedures are valuable testing methods for analysing the external fracture behaviour and for determining the fracture resistance of restorations. 25,91,93,94,101,112,114 This kind of test is not only supposed to provide the limits of strength where a restoration fails, but is also crucial for providing expected behaviour during normal function, for understanding material-design relationships, and tooth response to stress and strain.…”

Section: Assessment Of Load-bearing Capacity and Clinical Prediction mentioning

confidence: 99%

“…119 Other laboratory studies use computational (digital) testing methods for analysing and obtaining information about the internal behaviour of the tested specimens such as the finite element method (FEM). [120][121][122][123][124][125] In contrast to experimental investigations on real in vitro or in vivo specimens, FEM has many benefits. It is a repeatable method that might be modified as it is needed, and there are no considerations for ethical approvals.…”

Section: Assessment Of Load-bearing Capacity and Clinical Prediction mentioning

confidence: 99%

“…In the field of dentistry, recent years have witnessed a growing academic interest in FEM as a research tool for analysing stress and deformations on structures of interest such as implants, bone, different kinds of teeth preparations, and post and core restorations. [120][121][122][123][124][125] The FEM of simulated occlusal loads can also be used to optimize the shape of restorations by studying the internal stress within teeth and restorations with different dental materials and designs.…”

Section: Assessment Of Load-bearing Capacity and Clinical Prediction mentioning

confidence: 99%

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Monolithic and semi-monolithic translucent zirconium-dioxide restorations : aspects on design, material and strength

Bakitian¹

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Objective: To evaluate fracture strength of veneered translucent zirconium dioxide crowns designed with different porcelain layer thicknesses. Materials and Methods: Sixty crowns, divided into six groups of 10, were used in this study. Groups were divided according to different thicknesses of porcelain veneer on translucent zirconium dioxide cores of equal thickness (0.5 mm). Porcelain thicknesses were 2.5, 2.0, 1.0, 0.8, 0.5 and 0.3 mm. Crowns were artificially aged before loaded to fracture. Determination of fracture mode was performed using light microscope. Results: Group 1.0 mm showed significantly (p .05) highest fracture loads (mean 1540 N) in comparison with groups 2.5, 2.0 and 0.3 mm (mean 851, 910 and 1202 N). There was no significant difference (p>.05) in fracture loads among groups 1.0, 0.8 and 0.5 mm (mean 1540, 1313 and 1286 N). There were significantly (p .05) more complete fractures in group 0.3 mm compared to all other groups which presented mainly cohesive fractures. Conclusions: Translucent zirconium dioxide crowns can be veneered with minimal thickness layer of 0.5 mm porcelain without showing significantly reduced fracture strength compared to traditionally veneered (1.0-2.0 mm) crowns. Fracture strength of micro-veneered crowns with a layer of porcelain (0.3 mm) is lower than that of traditionally veneered crowns but still within range of what may be considered clinically sufficient. Porcelain layers of 2.0 mm or thicker should be used where expected loads are low only.

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