Influence of post dimension on stress distribution in dentin

Holmes, David; Diaz‐Arnold, Ana M.; Leary, James M.

doi:10.1016/s0022-3913(96)90090-6

Cited by 212 publications

(179 citation statements)

References 30 publications

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“…The mechanical properties of the materials (E and v) ( Tables 1-3) were transferred to the software Simpleware 4.1, based on literature data (10)(11)(12)(13) and the values calculated by the impulse excitation technique. All materials were assumed to be homogeneous, isotropic and linearly elastic; except for the glass and carbon fiber posts that were assumed as orthotropic, homogenous and linearly elastic.…”

Section: Mechanical Properties Of the Materials (Elastic Modulus [E] mentioning

confidence: 99%

Stress Distribution in Roots Restored with Fiber Posts and An Experimental Dentin Post: 3D-FEA

et al. 2016

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The aim of this study was to compare the stress distribution in radicular dentin of a maxillary canine restored with either a glass fiber post, carbon fiber post or an experimental dentin post using finite element analysis (3D-FEA). Three 3D virtual models of a maxillary canine restored with a metal-ceramic crown and glass fiber post (GFP), carbon fiber post (CFP), and experimental dentin post (DP) were obtained based on micro-CT images. A total of 180 N was applied on the lingual surface of the incisal third of each tooth at 45 degrees. The models were supported by the periodontal ligament fixed in three axes (x=y=z=0). The von Mises stress (VMS) of radicular dentin and the intracanal posts was calculated. The structures of all groups showed similar values (MPa) and distribution of maximum von Mises stress. Higher stress was found in the apical third of dentin while the posts presented homogeneous stress distribution along the axis. The fiber and dentin posts exhibited similar stress values and distribution. Thus, the experimental dentin post is a promising restorative material. S t r e s s D i s t r i b u t i o n i n R o o t s

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Section: Mechanical Properties Of the Materials (Elastic Modulus [E] mentioning

confidence: 99%

Stress Distribution in Roots Restored with Fiber Posts and An Experimental Dentin Post: 3D-FEA

et al. 2016

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“…However, some investigations have demonstrated that root post transmits masticatory loads to the tooth root and supporting structures [5][6][7][8][9] . Accordingly, research works related to the biomechanics of dental materials have been carried out to evaluate the effect of masticatory loads on the stress distribution within endodontically treated teeth restored with intra-radicular posts [10][11][12][13][14][15][16][17][18][19] . This allows one to pinpoint highly stressed regions where fracture is expected to initiate.…”

Section: Introductionmentioning

confidence: 99%

“…The subdivision of the structure allows one to determine the stress distribution and hence to identify highly stressed regions where cracks are most likely to nucleate and, eventually, lead to partial or total fracture of the restored tooth. Despite the advantages of the fi nite element method, it should be emphasized that the use of improper data concerning material's properties, model geometries or boundary conditions would result in defi cient or even incorrect outputs 16 . The present study has the purpose of applying two-dimensional (2D) fi nite element method to determine the stress distribution in a maxillary central incisor, with a small root-dentin thickness, restored with two different posts, namely a cast gold post (indirect technique) and a prefabricated carbon fi ber post (direct technique).…”

Section: Introductionmentioning

confidence: 99%

“…One should, though, point out that two-dimensional softwares assume that the model's geometry remains unchanged in all sections parallel to the plane of the model. Axisymmetric models are therefore more representative and three-dimensional (3D) models would represent the most faithful simulation of clinical situations 10,16 . Three-dimensional models are surely more accurate in describing the actual state of stress but, at the same time, much more complicated to realize and they do require a much extensive computing time to be resolved 4 .…”

Section: Introductionmentioning

confidence: 99%

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Stress prediction in a central incisor with intra-radicular restorations

et al. 2011

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A 2D fi nite element analysis was applied to calculate shear and von Mises equivalent stresses developed, under masticatory loading, in an upper central incisor restored with cast gold post and carbon fi ber reinforced epoxy resin post. Based on the predicted shear stress levels, it is concluded that the gold post model is more prone to shear failure along the post-dentin interface. Whereas shear stress concentration also occurs in both models at the core-crown interface, the stress level predicted there is higher for the carbon fi ber post model which would be more susceptible to crown displacement. Finally, the prediction of von Mises equivalent stress indicates a nonuniform distribution, with the stress preferentially concentrated in the gold post along its interface with the tooth dentin. For the carbon fi ber post restored model, on the other hand, the von Mises stresses are more uniformly distributed achieving its maximum level in the tooth dentin.

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“…7 The most common modes of failure associated with metal posts include loss of retention, root fracture or post fracture. [8][9][10][11][12] The above diffi culties associated with metal posts coupled with developments…”

Section: Introductionmentioning

confidence: 99%