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Importance of a distal proximal contact on load transfer by implant-supported single adjacent crowns in posterior region of the mandible: a photoelastic study

Identifieur interne : 000646 ( Pmc/Checkpoint ); précédent : 000645; suivant : 000647

Importance of a distal proximal contact on load transfer by implant-supported single adjacent crowns in posterior region of the mandible: a photoelastic study

Auteurs : Fábio Afrânio De Aguiar Júnior ; Rodrigo Tiossi ; Ana Paula Macedo ; Maria Da Gloria Chiarello De Mattos ; Ricardo Faria Ribeiro ; Renata Cristina Silveira Rodrigues

Source :

RBID : PMC:3881849

Abstract

Objective

This study aimed to evaluate the importance of a distal proximal contact on the load transfer to the posterior region of the mandible by non-splinted adjacent implant-supported crowns using photoelastic stress analysis.

Material and Methods

A rectangular model (68x30x15 mm) was made of polymethylmethacrylate resin to simulate half of the mandibular arch. One model was completed with resin replicas representing the first premolar and second molar and with two 3.75 mm dia.x11 mm internal hexagon threaded implants replacing the second premolar and first molar. The other model was manufactured in the same way but without the second molar. Both models were duplicated using photoelastic resin. The roots of the teeth replicas were covered with a layer of polyether impression material to simulate the periodontal ligament. Two different vertical loads were applied to the crowns as follows: 1 - single static point load alternately applied to the crowns replacing the second premolar and first molar (50 N); 2 - simultaneous static point loads applied to both of the crowns replacing the second premolar and first molar (100 N). The resulting isochromatic fringe pattern in the photoelastic model was monitored and photographed.

Results

All loading conditions studied showed that the presence of the second molar has changed the load transmission and the pattern of stresses.

Conclusion

Results showed that the presence of a second molar proximal contact can help minimize the stresses around the implants.


Url:
DOI: 10.1590/1679-775720130049
PubMed: 24212984
PubMed Central: 3881849


Affiliations:


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PMC:3881849

Le document en format XML

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<title>Objective</title>
<p>This study aimed to evaluate the importance of a distal proximal contact on the load transfer to the posterior region of the mandible by non-splinted adjacent implant-supported crowns using photoelastic stress analysis. </p>
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<sec>
<title>Material and Methods</title>
<p>A rectangular model (68x30x15 mm) was made of polymethylmethacrylate resin to simulate half of the mandibular arch. One model was completed with resin replicas representing the first premolar and second molar and with two 3.75 mm dia.x11 mm internal hexagon threaded implants replacing the second premolar and first molar. The other model was manufactured in the same way but without the second molar. Both models were duplicated using photoelastic resin. The roots of the teeth replicas were covered with a layer of polyether impression material to simulate the periodontal ligament. Two different vertical loads were applied to the crowns as follows: 1 - single static point load alternately applied to the crowns replacing the second premolar and first molar (50 N); 2 - simultaneous static point loads applied to both of the crowns replacing the second premolar and first molar (100 N). The resulting isochromatic fringe pattern in the photoelastic model was monitored and photographed.</p>
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<title>Results</title>
<p>All loading conditions studied showed that the presence of the second molar has changed the load transmission and the pattern of stresses.</p>
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<p>Results showed that the presence of a second molar proximal contact can help minimize the stresses around the implants.</p>
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<front>
<journal-meta>
<journal-id journal-id-type="nlm-ta">J Appl Oral Sci</journal-id>
<journal-id journal-id-type="iso-abbrev">J Appl Oral Sci</journal-id>
<journal-id journal-id-type="publisher-id">J. Appl. Oral. Sci.</journal-id>
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<journal-title>Journal of Applied Oral Science</journal-title>
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<issn pub-type="ppub">1678-7757</issn>
<issn pub-type="epub">1678-7765</issn>
<publisher>
<publisher-name>Faculdade de Odontologia de Bauru da Universidade de São Paulo</publisher-name>
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<article-meta>
<article-id pub-id-type="pmid">24212984</article-id>
<article-id pub-id-type="pmc">3881849</article-id>
<article-id pub-id-type="doi">10.1590/1679-775720130049</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Original Articles</subject>
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<title-group>
<article-title>Importance of a distal proximal contact on load transfer by implant-supported single adjacent crowns in posterior region of the mandible: a photoelastic study</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname>de AGUIAR JÚNIOR</surname>
<given-names>Fábio Afrânio</given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname>TIOSSI</surname>
<given-names>Rodrigo</given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname>MACEDO</surname>
<given-names>Ana Paula</given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname>de MATTOS</surname>
<given-names>Maria da Gloria Chiarello</given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname>RIBEIRO</surname>
<given-names>Ricardo Faria</given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname>RODRIGUES</surname>
<given-names>Renata Cristina Silveira</given-names>
</name>
<xref ref-type="corresp" rid="c01"></xref>
</contrib>
<aff>Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.</aff>
</contrib-group>
<author-notes>
<corresp id="c01">
<bold>Corresponding address:</bold>
Renata C. S. Rodrigues - Faculdade de Odontologia de Ribeirão Preto - Universidade de São Paulo - Departamento de Materiais Dentários e Prótese - Av. do Café, s/n - Monte Alegre - Ribeirão Preto - SP - Brasil - 14040-904 - Phone: +55 (16) 3602-4005 - Fax: +55 (16) 3633-0999 - e-mail:
<email>renata@forp.usp.br</email>
</corresp>
</author-notes>
<pub-date pub-type="ppub">
<season>Sep-Oct</season>
<year>2013</year>
</pub-date>
<volume>21</volume>
<issue>5</issue>
<fpage>397</fpage>
<lpage>402</lpage>
<history>
<date date-type="received">
<day>10</day>
<month>1</month>
<year>2013</year>
</date>
<date date-type="rev-recd">
<day>29</day>
<month>4</month>
<year>2013</year>
</date>
<date date-type="accepted">
<day>04</day>
<month>7</month>
<year>2013</year>
</date>
</history>
<permissions>
<license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/">
<license-p>This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. </license-p>
</license>
</permissions>
<abstract>
<sec>
<title>Objective</title>
<p>This study aimed to evaluate the importance of a distal proximal contact on the load transfer to the posterior region of the mandible by non-splinted adjacent implant-supported crowns using photoelastic stress analysis. </p>
</sec>
<sec>
<title>Material and Methods</title>
<p>A rectangular model (68x30x15 mm) was made of polymethylmethacrylate resin to simulate half of the mandibular arch. One model was completed with resin replicas representing the first premolar and second molar and with two 3.75 mm dia.x11 mm internal hexagon threaded implants replacing the second premolar and first molar. The other model was manufactured in the same way but without the second molar. Both models were duplicated using photoelastic resin. The roots of the teeth replicas were covered with a layer of polyether impression material to simulate the periodontal ligament. Two different vertical loads were applied to the crowns as follows: 1 - single static point load alternately applied to the crowns replacing the second premolar and first molar (50 N); 2 - simultaneous static point loads applied to both of the crowns replacing the second premolar and first molar (100 N). The resulting isochromatic fringe pattern in the photoelastic model was monitored and photographed.</p>
</sec>
<sec>
<title>Results</title>
<p>All loading conditions studied showed that the presence of the second molar has changed the load transmission and the pattern of stresses.</p>
</sec>
<sec>
<title>Conclusion</title>
<p>Results showed that the presence of a second molar proximal contact can help minimize the stresses around the implants.</p>
</sec>
</abstract>
<kwd-group>
<kwd>Fixed partial denture</kwd>
<kwd>Dental implants</kwd>
<kwd>Implant-supported dental prosthesis</kwd>
<kwd>Dental stress analysis</kwd>
</kwd-group>
<funding-group>
<award-group>
<funding-source>FAPESP - São Paulo Research Foundation</funding-source>
<award-id>#2008/06960-8</award-id>
</award-group>
</funding-group>
</article-meta>
</front>
</pmc>
<affiliations>
<list></list>
<tree>
<noCountry>
<name sortKey="De Aguiar Junior, Fabio Afranio" sort="De Aguiar Junior, Fabio Afranio" uniqKey="De Aguiar Junior F" first="Fábio Afrânio" last="De Aguiar Júnior">Fábio Afrânio De Aguiar Júnior</name>
<name sortKey="De Mattos, Maria Da Gloria Chiarello" sort="De Mattos, Maria Da Gloria Chiarello" uniqKey="De Mattos M" first="Maria Da Gloria Chiarello" last="De Mattos">Maria Da Gloria Chiarello De Mattos</name>
<name sortKey="Macedo, Ana Paula" sort="Macedo, Ana Paula" uniqKey="Macedo A" first="Ana Paula" last="Macedo">Ana Paula Macedo</name>
<name sortKey="Ribeiro, Ricardo Faria" sort="Ribeiro, Ricardo Faria" uniqKey="Ribeiro R" first="Ricardo Faria" last="Ribeiro">Ricardo Faria Ribeiro</name>
<name sortKey="Rodrigues, Renata Cristina Silveira" sort="Rodrigues, Renata Cristina Silveira" uniqKey="Rodrigues R" first="Renata Cristina Silveira" last="Rodrigues">Renata Cristina Silveira Rodrigues</name>
<name sortKey="Tiossi, Rodrigo" sort="Tiossi, Rodrigo" uniqKey="Tiossi R" first="Rodrigo" last="Tiossi">Rodrigo Tiossi</name>
</noCountry>
</tree>
</affiliations>
</record>

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