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Comparison of the Effect of Three Abutment-implant Connections on Stress Distribution at the Internal Surface of Dental Implants: A Finite Element Analysis

Identifieur interne : 003121 ( Pmc/Curation ); précédent : 003120; suivant : 003122

Comparison of the Effect of Three Abutment-implant Connections on Stress Distribution at the Internal Surface of Dental Implants: A Finite Element Analysis

Auteurs : Saeed Raoofi [Iran] ; Maryam Khademi [Iran] ; Reza Amid [Iran] ; Mahdi Kadkhodazadeh [Iran] ; Mohammad Reza Movahhedi [Iran]

Source :

RBID : PMC:3779371

Abstract

Background and aims. The aim of this study was to determine the stress patterns within an implant and the effect of different types of connections on load transfer.

Materials and methods. Three different types of implant-abutment connections were selected for this study. Sample A: 1.5-mm deep internal hex corresponding to a lead-in bevel; sample B: a tri-channel internal connection; and sample C: in-ternal Morse taper with 110 degrees of tapering and 6 anti-rotational grooves. Four types of loading conditions were simu-lated in a finite element model, with the maximum von Mises stress set as output variables.

Results. The maximum stress concentration at the inner surface of the fixtures was higher than the stress value in bone in all of the samples. Stress values in sample B were the lowest amongst all of the models. Any alterations in the amount and direction of the 100-N axial load resulted in an increase in fixture surfaces stress. Overall, the highest amount of stress (112 MPa) was detected in sample C at the inner surface of the fixture under a non-axial load of 300 N.

Conclusion. Stress concentration decreased when the internal surface area increased. Creating three or six stops in the internal surface of the fixtures resulted in a decrease in stress.


Url:
DOI: 10.5681/joddd.2013.021
PubMed: 24082983
PubMed Central: 3779371

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PMC:3779371

Le document en format XML

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<italic>Background and aims.</italic>
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The aim of this study was to determine the stress patterns within an implant and the effect of different types of connections on load transfer. </p>
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<italic>Materials and methods.</italic>
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Three different types of implant-abutment connections were selected for this study. Sample A: 1.5-mm deep internal hex corresponding to a lead-in bevel; sample B: a tri-channel internal connection; and sample C: in-ternal Morse taper with 110 degrees of tapering and 6 anti-rotational grooves. Four types of loading conditions were simu-lated in a finite element model, with the maximum von Mises stress set as output variables. </p>
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<italic>Results.</italic>
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The maximum stress concentration at the inner surface of the fixtures was higher than the stress value in bone in all of the samples. Stress values in sample B were the lowest amongst all of the models. Any alterations in the amount and direction of the 100-N axial load resulted in an increase in fixture surfaces stress. Overall, the highest amount of stress (112 MPa) was detected in sample C at the inner surface of the fixture under a non-axial load of 300 N. </p>
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<italic>Conclusion.</italic>
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Stress concentration decreased when the internal surface area increased. Creating three or six stops in the internal surface of the fixtures resulted in a decrease in stress. </p>
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<journal-id journal-id-type="nlm-ta">J Dent Res Dent Clin Dent Prospects</journal-id>
<journal-id journal-id-type="iso-abbrev">J Dent Res Dent Clin Dent Prospects</journal-id>
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<subject>Original Article</subject>
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<title-group>
<article-title>Comparison of the Effect of Three Abutment-implant Connections on Stress Distribution at the Internal Surface of Dental Implants: A Finite Element Analysis</article-title>
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<contrib-group>
<contrib contrib-type="author">
<name>
<surname>Raoofi</surname>
<given-names>Saeed</given-names>
</name>
<xref ref-type="aff" rid="A01">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Khademi</surname>
<given-names>Maryam</given-names>
</name>
<xref ref-type="aff" rid="A02">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Amid</surname>
<given-names>Reza</given-names>
</name>
<xref ref-type="aff" rid="A03">
<sup>3</sup>
</xref>
<xref rid="COR1" ref-type="corresp">*</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Kadkhodazadeh</surname>
<given-names>Mahdi</given-names>
</name>
<xref ref-type="aff" rid="A04">
<sup>4</sup>
</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Movahhedi</surname>
<given-names>Mohammad Reza</given-names>
</name>
<xref ref-type="aff" rid="A05">
<sup>5</sup>
</xref>
</contrib>
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<aff id="A01">
<sup>1</sup>
Assistant Professor, Department of Periodontics, Faculty of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran</aff>
<aff id="A02">
<sup>2</sup>
Assistant Professor, Department of Periodontics, Faculty of Dentistry, Ahwaz University of Medical Sciences, Ahwaz, Iran</aff>
<aff id="A03">
<sup>3</sup>
Assistant Professor, Department of Periodontics, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran</aff>
<aff id="A04">
<sup>4</sup>
Associate Professor, Department of Periodontics, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran</aff>
<aff id="A05">
<sup>5</sup>
PhD, Department of Industrial Manufacturing, Sharif University of Technology, Tehran, Iran</aff>
<author-notes>
<corresp id="COR1">
<label>*</label>
*Corresponding Author;
<email>Reza_amid@yahoo.com</email>
</corresp>
</author-notes>
<pub-date pub-type="ppub">
<season>Summer</season>
<year>2013</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>8</month>
<year>2013</year>
</pub-date>
<volume>7</volume>
<issue>3</issue>
<fpage>132</fpage>
<lpage>139</lpage>
<history>
<date date-type="received">
<day>13</day>
<month>8</month>
<year>2012</year>
</date>
<date date-type="accepted">
<day>12</day>
<month>3</month>
<year>2013</year>
</date>
</history>
<permissions>
<copyright-statement>© 2012 The Authors; Tabriz University of Medical Sciences</copyright-statement>
<copyright-year>2013</copyright-year>
<license xlink:href="http://creativecommons.org/licenses/by/3.0/" license-type="open-access">
<license-p>
<pmc-comment>CREATIVE COMMONS</pmc-comment>
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (
<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/3.0">http://creativecommons.org/licenses/by/3.0</ext-link>
), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
</license>
</permissions>
<self-uri xlink:type="simple" xlink:href="http://dentistry.tbzmed.ac.ir/jpid">This article is available from: http://dentistry.tbzmed.ac.ir/joddd</self-uri>
<abstract>
<p>
<bold>
<italic>Background and aims.</italic>
</bold>
The aim of this study was to determine the stress patterns within an implant and the effect of different types of connections on load transfer. </p>
<p>
<bold>
<italic>Materials and methods.</italic>
</bold>
Three different types of implant-abutment connections were selected for this study. Sample A: 1.5-mm deep internal hex corresponding to a lead-in bevel; sample B: a tri-channel internal connection; and sample C: in-ternal Morse taper with 110 degrees of tapering and 6 anti-rotational grooves. Four types of loading conditions were simu-lated in a finite element model, with the maximum von Mises stress set as output variables. </p>
<p>
<bold>
<italic>Results.</italic>
</bold>
The maximum stress concentration at the inner surface of the fixtures was higher than the stress value in bone in all of the samples. Stress values in sample B were the lowest amongst all of the models. Any alterations in the amount and direction of the 100-N axial load resulted in an increase in fixture surfaces stress. Overall, the highest amount of stress (112 MPa) was detected in sample C at the inner surface of the fixture under a non-axial load of 300 N. </p>
<p>
<bold>
<italic>Conclusion.</italic>
</bold>
Stress concentration decreased when the internal surface area increased. Creating three or six stops in the internal surface of the fixtures resulted in a decrease in stress. </p>
</abstract>
<kwd-group>
<kwd>Biomechanics</kwd>
<kwd>dental implant/abutment</kwd>
<kwd>finite element</kwd>
<kwd>stress</kwd>
</kwd-group>
</article-meta>
</front>
</pmc>
</record>

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