The effects of post-core and crown material and luting agents on stress distribution in tooth restorations

Oyar, Perihan

doi:10.1016/j.prosdent.2013.10.024

Cited by 22 publications

(16 citation statements)

References 31 publications

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“…This could be attributed to its intimate contact with the walls of the root canal, which may explain the higher clinical survival rate found in CPCs [11]. Romeed and Dunne [13] compared the stress distribution between metallic posts or glass fiber posts and the dentin walls of root canals and found a significant increase in root tensions in the group restored with fiber posts, which lead to the conclusion that the modulus of elasticity of the intraradicular post is inversely proportional to the stress transmitted to the root, in agreement with other studies [6,9]. It is important to note that the stress distribution in the root dentin is the main factor leading to restoration failure, once it can generate root fractures, cement-post debonding of the dentin walls, and post mobility, which must be taken into consideration by the clinician during the proper case planning [16].…”

Section: Introductionsupporting

confidence: 82%

Two-year clinical performance of cast post and core self-adhesive cementation

Gontarski

Pomini

Cenci

et al. 2018

RSBO

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Introduction and Objective: Endodontically treated teeth commonly present extensive tissue loss, requiring the use intraradicular posts, which provide retention for a coronal rehabilitation. Cast post and cores (CPCs) have been traditionally used in cases of marked tooth tissue loss. Case report: This case report describes two cast post and cores and subsequent rehabilitation by metal ceramic crowns. The patient was followed-up at intervals of 12 and 24 months after the rehabilitation. The posts were cemented within the root canal with self-adhesive resin cement, in a way that guarantees a perfect sealing of the root and remains stable in the oral environment. Conclusion: Self-adhesive cements are a one-step material capable of providing additional chemical adhesion to the metal, creating a monoblock, quality not found in conventional resin cements, where the adhesion occurs only in the dentin-cement interface.

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Section: Introductionsupporting

confidence: 82%

Two-year clinical performance of cast post and core self-adhesive cementation

Gontarski

Pomini

Cenci

et al. 2018

RSBO

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“…Moreover, when elastic deformation occurs during loading, fatigue and failure of the restoration can occur. Resistance to plastic deformation can increase resistance to dislodgement and cement fracture, but may lead to marginal gap formation (28). In the present study, the elastic modulus values of all the materials increased significantly after 1 h. Although no significant differences were found between with and without water application on each measuring period for UC, significant differences were found for RX.…”

Section: Discussioncontrasting

confidence: 50%

Ultrasonic measurement of the effects of light irradiation and presence of water on the polymerization of self‐adhesive resin cement

Takenaka

Ouchi

Sai

et al. 2015

European J Oral Sciences

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Self-adhesive resin cements are useful in restorations because they reduce the number of clinical steps involved in the restoration process. This study evaluated, using ultrasonic measurements, the influence of light irradiation and the presence of water on the polymerization behavior and elastic modulus of a self-adhesive resin cement. A self-adhesive resin cement (RelyX Unicem 2 Automix) or a resin cement (RelyX ARC) was inserted into a transparent mold on a sample stage, and the presence of water and effect of light-irradiation were evaluated. The transit time of a sonic wave through the cement disk was divided by the specimen thickness to obtain the sonic velocity, and longitudinal and shear waves were used to determine the elastic modulus. When the resin cements were light-irradiated, the sonic velocity rapidly increased and plateaued at 2,500-2,700 m s . When the cements were not irradiated, the rates of increase in the sonic velocity were reduced. When water was applied to the sample stage, the sonic velocity was reduced. The elastic modulus values of the specimens ranged from 9.9 to 15.9 GPa after 24 h. The polymerization behavior of self-adhesive resin cements is affected by the polymerization mode and the presence of water.

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“…The finite element method has been used to investigate stress distributions of post-core systems for endodontically treated teeth. [23][24][25][26][27] The purpose of this study was to determine the von Mises stress distribution in the post-core system and root structures of a maxillary canine, which bears a relatively large occlusal force, 28 by reconstructing the maxilla and the maxillary canine from computed tomography images of a human cadaver.…”

mentioning

confidence: 99%