Influence of inhomogeneous dental posts on stress distribution in tooth root and interfaces: Three-dimensional finite element analysis

Mahmoudi, Mojtaba; Saidi, A.R.; Amini, Parviz; Hashemipour, Maryam Alsadat

doi:10.1016/j.prosdent.2017.01.002

Cited by 25 publications

(51 citation statements)

References 34 publications

(49 reference statements)

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“…In the field of endodontics, the fracture resistance of teeth should be improved by cementing a post into the root [4,5]. Generally, cast metal posts and prefabricated posts are employed.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, cast metal posts and prefabricated posts are employed. The use of cast metal posts requires expensive and time-consuming procedures as well as a direct pattern or impression of the root cavity, whereas prefabricated posts involve less expensive and straightforward procedures which can be carried out in a single visit [4].…”

Section: Introductionmentioning

confidence: 99%

“…The levels of stress and strain generated in endodontically treated teeth are strongly related to the employed post-and-core systems [4]. Nevertheless, it remains unclear whether a flexible or stiff post is needed.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, it remains unclear whether a flexible or stiff post is needed. The risk of root fracture in endodontically treated teeth depends upon the restoration stiffness, and many studies focusing on which material might reduce stresses suggest that neither flexible nor stiff posts are ideal [4,5]. Cast posts and prefabricated metal posts usually generate high stresses at the post-dentin interface as a consequence of the use of high modulus materials [4,5].…”

Section: Introductionmentioning

confidence: 99%

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Metal Posts and the Effect of Material–Shape Combination on the Mechanical Behavior of Endodontically Treated Anterior Teeth

Gloria

Maietta

Richetta

et al. 2019

Metals

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The control of the process–structure–property relationship of a material plays an important role in the design of biomedical metal devices featuring desired properties. In the field of endodontics, several post-core systems have been considered, which include a wide range of industrially developed posts. Endodontists generally use posts characterized by different materials, sizes, and shapes. Computer-aided design (CAD) and finite element (FE) analysis were taken into account to provide further insight into the effect of the material–shape combination of metal posts on the mechanical behavior of endodontically treated anterior teeth. In particular, theoretical designs of metal posts with two different shapes (conical-tapered and conical-cylindrical) and consisting of materials with Young’s moduli of 110 GPa and 200 GPa were proposed. A load of 100 N was applied on the palatal surface of the crown at 45° to the longitudinal axis of the tooth. Linear static analyses were performed with a non-failure condition. The results suggested the possibility to tailor the stress distribution along the metal posts and at the interface between the post and the surrounding structures, benefiting from an appropriate combination of a CAD-based approach and material selection. The obtained results could help to design metal posts that minimize stress concentrations.

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“…In the field of endodontics, the fracture resistance of teeth should be improved by cementing a post into the root [4,5]. Generally, cast metal posts and prefabricated posts are employed.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Metal Posts and the Effect of Material–Shape Combination on the Mechanical Behavior of Endodontically Treated Anterior Teeth

Gloria

Maietta

Richetta

et al. 2019

Metals

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“…Material properties greatly influence the stress distribution around reconstructed tooth structure. 27 Analysis of stress distribution reveals that in the absence of post intra-canal stress intensity is insignificant. The more intense stresses appear in the cervical region with regard to the influence of root canal post.…”

mentioning

confidence: 99%

Tensile stress distribution in maxillary central incisors restored with cast-made and prefabricated dental posts.

Madfa

Senan

Yue³

2017

J Oral Res

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Aim: To analyze and compare the tensile stress distribution in endodontically treated teeth restored with cast-made (Ni-Cr and gold) and prefabricated (titanium and glass fibre) dental posts. Methodology: Four threedimensional finite element (FE) models of a maxillary central incisor restored with Ni-Cr cast-made (Model Ni-Cr), gold cast-made (Model GO), prefabricated titanium (Model TI) and prefabricated glass fibre (Model FP) posts were constructed. An oblique loading of 100N was applied to each three-dimensional model. Tensile stress distribution within the root dentine and at the post and surrounding structure interfaces were analysed. Results: In all the FE models studied, a higher magnitude of tensile stresses was observed on the palatal aspect of the cervical dentin as compared to the labial aspect and progressively decreases from the outer to the inner part of the root. The gold cast-made and glass fibre post models showed significantly less tensile stress concentration in the post-core component than the other experimental models. The maximum tensile stress was seen on the palatal aspect of the Ni-Cr compared to other posts. The higher magnitude interfacial tensile stress concentration was observed in a pulpless tooth restored with a Ni-Cr cast-made post, followed by titanium and gold castmade posts, respectively. However, the minimum interfacial tensile stress was noticed in a pulpless tooth restored with a glass fibre post. Conclusion: Glass fibre posts tend to transfer tensile stress more homogenously within the tooth and at interfaces than the other types of investigated posts.

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Mechanical behavior of endodontically restored canine teeth: Effects of ferrule, post material and shape

et al. 2017

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Influence of inhomogeneous dental posts on stress distribution in tooth root and interfaces: Three-dimensional finite element analysis

Cited by 25 publications

References 34 publications

Metal Posts and the Effect of Material–Shape Combination on the Mechanical Behavior of Endodontically Treated Anterior Teeth

Metal Posts and the Effect of Material–Shape Combination on the Mechanical Behavior of Endodontically Treated Anterior Teeth

Tensile stress distribution in maxillary central incisors restored with cast-made and prefabricated dental posts.

Mechanical behavior of endodontically restored canine teeth: Effects of ferrule, post material and shape

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