Fracture characteristics of carbon fibre, ceramic and non‐palladium endodontic post systems at monotonously increasing loads

Ottl, Peter; Hahn, L.; Lauer, Hans–Christoph; M, Fay

doi:10.1046/j.1365-2842.2002.00852.x

Cited by 75 publications

(106 citation statements)

References 13 publications

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“…1 In these cases, the use of posts is recommended to promote retention of the final restoration. [2][3] The preservation of tooth structure is an important factor in the successful restoration of endodontically treated teeth. Some authors 4,5 have suggested that a tooth should have a minimum amount (2 mm) of coronal structure above the cementoenamel junction (CEJ) to ensure a proper shape of strength for a tooth.…”

Section: Introductionmentioning

confidence: 99%

Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts

et al. 2011

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Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts Abstract: The purpose of this study was to evaluate the fracture strength of roots that were prosthetically restored with metallic posts with or without any remaining coronal structure and with different finish lines. Sixty bovine incisors were sectioned below the cementoenamel junction, endodontically treated, and randomly divided into six experimental groups (n = 10) containing teeth with or without any remaining coronal structure, and with a beveled shoulder, a bevel, or a shoulder finish line design. The metallic posts were luted with dual-cured resin cement. The cores were made with composite resin, and metal crowns were cemented with zinc phosphate cement. The specimens were subjected to a tangential compressive load (135° angle) at a crosshead speed of 0.5 mm/min until failure, using a universal testing machine. The fracture strength data were analyzed using the ANOVA and LSMeans (least square means) tests (α = 0.05). The data indicated that the teeth with 2 mm of remaining coronal structure showed the highest fracture strength values when compared with the teeth without any remaining structure (p < 0.05). As to the different finish line designs, the highest fracture strength values were obtained for the beveled shoulder, followed by the bevel and then by the shoulder designs (p < 0.05). It may be concluded that, to increase fracture strength, a beveled shoulder and 2 mm of remaining coronal structure are the ideal conditions.

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Section: Introductionmentioning

confidence: 99%

Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts

et al. 2011

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“…The placement of posts in endodontically treated teeth reduced stress in this area [3][4][5] . When the post is inserted into the root canal, some of its force is directed along the post length.…”

Section: ⅰ Introductionmentioning

confidence: 99%

Finite element analysis of maxillary central incisors restored with various post-and-core applications

Seo

Shon

Lee

et al. 2009

J Korean Acad Conserv Dent

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The purpose of this study was to investigate the effect of rigidity of post core systems on stress distribution by the theoretical technique, finite element stress-analysis method. Three-dimensional finite element models simulating an endodontically treated maxillary central incisor restored with a zirconia ceramic crown were prepared and 1.5 mm ferrule height was provided. Each model contained cortical bone, trabecular bone, periodontal ligament, 4 mm apical root canal filling, and post-and-core. Six combinations of three parallel type post (zirconia ceramic, glass fiber, and stainless steel) and two core (Paracore and Tetric ceram) materials were evaluated, respectively. A 50 N static occlusal load was applied to the palatal surface of the crown with a 60� angle to the long axis of the tooth. The differences in stress transfer characteristics of the models were analyzed. von Mises stresses were chosen for presentation of results and maximum displacement and hydrostatic pressure were also calculated. An increase of the elastic modulus of the post material increased the stress, but shifted the maximum stress location from the dentin surface to the post material. Buccal side of cervical region (junction of core and crown) of the glass fiber post restored tooth was subjected to the highest stress concentration. Maximum von Mises stress in the remaining radicular tooth structure for low elastic modulus resin core (29.21 MPa) was slightly higher than that for high elastic modulus resin core (29.14 MPa) in case of glass fiber post. Maximum displacement of glass fiber post restored tooth was higher than that of zirconia ceramic or stainless steel post restored tooth. [J Kor Acad Cons Dent 34(4): [324][325][326][327][328][329][330][331][332] 2009]

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“…32 Furthermore, sealers penetrate into dentin tubuli, and their bond strength to dentin and the bond strengths of the composite cements to the sealers may [32][33] To study the effect of composite gap size, the influence of the other factors should be avoided, if possible. The bond strengths of composites to root dentin of the various areas might differ, 3,18 but this factor could not be excluded in the current study. The bond strengths of several FRC post systems are expected to be different, due to their shape and composition; this is why only one FRC post system was used for the current study.…”

Section: Discussionmentioning

confidence: 88%

“…In these situations, post space preparation for a precisely fitting post would mean reduction of the root dentin, which could weaken the remaining tooth substance. The fabrication of an individually cast post in the dental laboratory, which is time and costintensive, [17][18][19] might be needed.…”

Section: Introductionmentioning

confidence: 99%

Influence of Oversized Dowel Space Preparation on the Bond Strengths of FRC Posts

Schmage¹,

Pfeiffer²,

Pinto³

et al. 2009

Operative Dentistry

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SUMMARYThis study compared the bond strengths of fiberreinforced composite (FRC) posts luted into oversized dowel spaces with FRC posts luted into precisely fitting dowel spaces using five different resin cements or build-up composites. The hypotheses examined were that bond strength does not present vast variations according to the width of the gap between the root canal and post and that bond strength increases for FRC posts luted with build-up composites compared with FRC posts luted with resin cements. Dowel space preparations (ER post-restoring system, 12 mm in length) were performed on 100 human anterior teeth up to ISO 90 and ISO 110 of 50 roots each. FRC posts, all ISO size 90, were inserted into the precisely fitting as well as into the oversized dowel spaces (n=10) using five composite materials (Calibra, Multicore Flow, Rely X Unicem; resin cements and Build-It, Rebilda DC; build-up composites). The manufacturers' instructions of the composite materials were strictly followed except for Rebilda DC, which was used with Adhese for dentin bonding. Following water storage (37°C, 24 hours) and thermocycling (5000 cycles, 5°C-55°C, 30 seconds) tensile strength testing was performed and fracture modes were assessed using SEM.

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Fracture characteristics of carbon fibre, ceramic and non‐palladium endodontic post systems at monotonously increasing loads

Cited by 75 publications

References 13 publications

Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts

Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts

Finite element analysis of maxillary central incisors restored with various post-and-core applications

Influence of Oversized Dowel Space Preparation on the Bond Strengths of FRC Posts

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