Influence of Different Elastic Moduli of Dowel and Core on Stress Distribution in Root.

Ukon, Shinichi; Moroi, Hiroko; Okimoto, Kimie; Fujita, Makoto; Ishikawa, Masatsugu; Terada, Yoshihiro; Satoh, Hiroyuki

doi:10.4012/dmj.19.50

Cited by 48 publications

(44 citation statements)

References 18 publications

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“…The fi rst one is related to the fact that the stress calculation has been carried out based on a two dimensional simulation which has been proven, by previous publications, to be suffi ciently adequate to real situations 2,4,6,19,26,[33][34][35][36] . The second consideration refers to the assumption that the carbon fi ber post has an isotropic elastic behavior while, in fact, it is well known that unidirectionally oriented fi ber composites are orthotropic, with the transverse modulus representing a small fraction of the longitudinal modulus.…”

Section: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%

Stress prediction in a central incisor with intra-radicular restorations

et al. 2011

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“…Since dentin bonding systems have been shown to reinforce the remaining tooth structure [1][2][3][4][5] , non-vital teeth can be built up without removing undercuts in post holes. Further, in contrast with metal posts, the elastic modulus of a composite core material is similar to that of dentin 6,7) . This favorable property is therefore a boost to saving the remaining tooth structure from root fracture 8) .…”

Section: Introductionmentioning

confidence: 98%

Dentin Bond Strengths of Three Adhesive/Composite Core Systems using Different Curing Units

et al. 2008

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This study evaluated the tensile bond strengths of three adhesive/composite core materials to bovine dentin using three different curing units. Bovine dentin surfaces were ground with 600-grit SiC paper. Bonding area was demarcated with a vinyl tape (4-mm-diameter hole). Three adhesive/composite core systems -S6054 (experimental), UniFil Core, and Clearfil DC Core Automix -were used with three curing units -Curing Light XL3000 (quartz-tungsten-halogen), Hyper Lightel (high-power quartz-tungsten-halogen), and LEDemetron1 (blue light-emitting diode) -according to manufacturers' instructions. After 24 hours of storage in water at 37℃, tensile bond strengths were measured at a crosshead speed of 2 mm/min. Results were statistically analyzed with one-way ANOVA and Tukey' s HSD test (p<0.05). Highest tensile bond strength was obtained using Clearfil DC Core Automix with Hyper Lightel.

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“…FEA shows the internal stresses and, on that basis, predictions about failure can be made. The effect of post design (Sorensen and Martinoff 1984), post material (Ukon et al 2000) and core material (Combe et al 1999) is very important on dentinal stress distribution. Therefore, this study compared the dentinal stress distribution of 3-D finite element (FE) models of maxillary central incisors restored with 2 different post materials ( everaStick and cosmopost) and 2 different all-ceramic crown materials (IPS Empress e.max and Cercon).…”

Section: Methodsmentioning

confidence: 99%