EdenteV2, Main, Exploration, bibRecord, 009421

Fatigue testing and microscopic evaluation of post and core restorations under artificial crowns

Identifieur interne : 009421 ( Main/Exploration ); précédent : 009420; suivant : 009422

Fatigue testing and microscopic evaluation of post and core restorations under artificial crowns

Auteurs : Philippe Gateau [France] ; Marc Sabek [France] ; Bruno Dailey [France]

Source :

The Journal of Prosthetic Dentistry [ 0022-3913 ] ; 1999.

RBID : ISTEX:05D7B2220524F7081A3644694B5D1ECBD6A58FAC

English descriptors

Abstract

Abstract: Statement of problem. Coronoradicular reconstruction techniques of pulpless teeth include prefabricated post systems that retain a core material such as silver amalgam, composite, glass ionomer, or modified glass ionomer cement. Mechanical properties of these materials are critical to sustain masticatory forces. Purpose. This in vitro study compared the mechanical resistance of 3 core materials (silver amalgam, composite, and silver-reinforced glass ionomer) under masticatory conditions. Material and methods. Industrially fabricated teeth were used and a total of 75 specimens were divided into 3 groups of 25 specimens. Titanium canal posts were placed, followed by core buildups in amalgam, composite, or glass ionomer. Teeth were prepared for full cast crowns and the crowns were fabricated and cemented with glass ionomer cement. Twenty specimens from each group were placed in a mastication simulator cyclically loading the teeth with a 400 N force for 1.5 million cycles. The 5 remaining specimens were used as controls. Teeth were sectioned and observed macroscopically and microscopically to determine the rate of defects for each material. Observed defects were verified with the Kruskal-Wallis test. The 3 core materials were ranked with the Tukey multiple comparison test. Results. Significant differences of mechanical behavior were found for the 3 materials. At P <.01, silver amalgam was significantly superior to composite and glass ionomer. Composite was significantly superior to glass ionomer. Conclusion. Cores fabricated with amalgam had the lowest rate of defects when tested under artificial crowns. Glass ionomer, when used as a core material under artificial crowns, showed the highest rate of defects after an instantaneous load of 400 N for a 1,500,000 repetition cycle. (J Prosthet Dent 1999;82:341-7.)

Url:

https://api.istex.fr/document/05D7B2220524F7081A3644694B5D1ECBD6A58FAC/fulltext/pdf

DOI: 10.1016/S0022-3913(99)70090-9

Affiliations:

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Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Amalgam</term>
<term>Amalgam alloys</term>
<term>Amalgam cores</term>
<term>Angle orthod</term>
<term>Artificial crowns</term>
<term>Artificial teeth</term>
<term>Artificial tooth</term>
<term>Canal</term>
<term>Cast post</term>
<term>Cervical microleakage</term>
<term>Composite glass ionomer</term>
<term>Contact time</term>
<term>Core buildups</term>
<term>Core material</term>
<term>Core materials</term>
<term>Cytotoxic effects</term>
<term>Dailey</term>
<term>Defect</term>
<term>Dent</term>
<term>Dent mater</term>
<term>Dental amalgam</term>
<term>Dental amalgam restoration</term>
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<term>Different core materials</term>
<term>Endodontically</term>
<term>Espe gmbh</term>
<term>Fatigue life</term>
<term>Fatigue testing</term>
<term>Force recorder</term>
<term>Fracture</term>
<term>Fracture resistance</term>
<term>Fracture strength</term>
<term>Fracture toughness</term>
<term>Gateau</term>
<term>Glass ionomer</term>
<term>Glass ionomer cement</term>
<term>Glass ionomer cements</term>
<term>Henry schein</term>
<term>Ionomer</term>
<term>Lasticomp putty</term>
<term>Long axis</term>
<term>Mastication simulator</term>
<term>Masticatory</term>
<term>Masticatory forces</term>
<term>Mechanical properties</term>
<term>Mechanical resistance</term>
<term>Metal matrix band</term>
<term>Original magnification</term>
<term>Other materials</term>
<term>Post systems</term>
<term>Posterior teeth</term>
<term>Potential side effect</term>
<term>Prosthet</term>
<term>Prosthet dent</term>
<term>Prosthetic</term>
<term>Prosthetic dentistry</term>
<term>Prosthetic dentistry gateau</term>
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<term>Restorative materials</term>
<term>Root canal post</term>
<term>Sabek</term>
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<term>Square test</term>
<term>Swed dent</term>
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<term>Artificial teeth</term>
<term>Artificial tooth</term>
<term>Canal</term>
<term>Cast post</term>
<term>Cervical microleakage</term>
<term>Composite glass ionomer</term>
<term>Contact time</term>
<term>Core buildups</term>
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<term>Dailey</term>
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<term>Dent</term>
<term>Dent mater</term>
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<term>Fracture resistance</term>
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<term>Long axis</term>
<term>Mastication simulator</term>
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<term>Masticatory forces</term>
<term>Mechanical properties</term>
<term>Mechanical resistance</term>
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<term>Original magnification</term>
<term>Other materials</term>
<term>Post systems</term>
<term>Posterior teeth</term>
<term>Potential side effect</term>
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<term>Prosthet dent</term>
<term>Prosthetic</term>
<term>Prosthetic dentistry</term>
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<term>Restorative materials</term>
<term>Root canal post</term>
<term>Sabek</term>
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<front><div type="abstract" xml:lang="en">Abstract: Statement of problem. Coronoradicular reconstruction techniques of pulpless teeth include prefabricated post systems that retain a core material such as silver amalgam, composite, glass ionomer, or modified glass ionomer cement. Mechanical properties of these materials are critical to sustain masticatory forces. Purpose. This in vitro study compared the mechanical resistance of 3 core materials (silver amalgam, composite, and silver-reinforced glass ionomer) under masticatory conditions. Material and methods. Industrially fabricated teeth were used and a total of 75 specimens were divided into 3 groups of 25 specimens. Titanium canal posts were placed, followed by core buildups in amalgam, composite, or glass ionomer. Teeth were prepared for full cast crowns and the crowns were fabricated and cemented with glass ionomer cement. Twenty specimens from each group were placed in a mastication simulator cyclically loading the teeth with a 400 N force for 1.5 million cycles. The 5 remaining specimens were used as controls. Teeth were sectioned and observed macroscopically and microscopically to determine the rate of defects for each material. Observed defects were verified with the Kruskal-Wallis test. The 3 core materials were ranked with the Tukey multiple comparison test. Results. Significant differences of mechanical behavior were found for the 3 materials. At P <.01, silver amalgam was significantly superior to composite and glass ionomer. Composite was significantly superior to glass ionomer. Conclusion. Cores fabricated with amalgam had the lowest rate of defects when tested under artificial crowns. Glass ionomer, when used as a core material under artificial crowns, showed the highest rate of defects after an instantaneous load of 400 N for a 1,500,000 repetition cycle. (J Prosthet Dent 1999;82:341-7.)</div>
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Fatigue testing and microscopic evaluation of post and core restorations under artificial crowns

Fatigue testing and microscopic evaluation of post and core restorations under artificial crowns

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri