Load-bearing capacity of screw-retained CAD/CAM-produced titanium implant frameworks (I-Bridge®2) before and after cyclic mechanical loading
Identifieur interne : 002F75 ( Pmc/Curation ); précédent : 002F74; suivant : 002F76Load-bearing capacity of screw-retained CAD/CAM-produced titanium implant frameworks (I-Bridge®2) before and after cyclic mechanical loading
Auteurs : Marc Philipp Dittmer [Allemagne] ; Moritz Nensa [Allemagne] ; Meike Stiesch [Allemagne] ; Philipp Kohorst [Allemagne]Source :
- Journal of Applied Oral Science [ 1678-7757 ] ; 2013.
Abstract
Implant-supported screw-retained fixed dental prostheses (FDPs) produced by CAD/ CAM have been introduced in recent years for the rehabilitation of partial or total endentulous jaws. However, there is a lack of data about the long-term mechanical characteristics.
The aim of this study was to investigate the failure mode and the influence of extended cyclic mechanical loading on the load-bearing capacity of these frameworks.
Ten five-unit FDP frameworks simulating a free-end situation in the mandibular jaw were manufactured according to the I-Bridge®2-concept (I-Bridge®2, Biomain AB, Helsingborg, Sweden) and each was screw-retained on three differently angulated Astra Tech implants (30º buccal angulation/0º angulation/30º lingual angulation). One half of the specimens was tested for static load-bearing capacity without any further treatment (control), whereas the other half underwent five million cycles of mechanical loading with 100 N as the upper load limit (test). All specimens were loaded until failure in a universal testing machine with an occlusal force applied at the pontics. Load-displacement curves were recorded and the failure mode was macro- and microscopically analyzed. The statistical analysis was performed using a t-test (p=0.05).
All the specimens survived cyclic mechanical loading and no obvious failure could be observed. Due to the cyclic mechanical loading, the load-bearing capacity decreased from 8,496 N±196 N (control) to 7,592 N±901 N (test). The cyclic mechanical loading did not significantly influence the load-bearing capacity (p=0.060). The failure mode was almost identical in all specimens: large deformations of the framework at the implant connection area were obvious.
The load-bearing capacity of the I-Bridge®2 frameworks is much higher
than the clinically relevant occlusal forces, even with considerably angulated
implants. However, the performance under functional loading
Url:
DOI: 10.1590/1679-775720130077
PubMed: 24037068
PubMed Central: 3881892
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Load-bearing capacity of screw-retained CAD/CAM-produced titanium implant
frameworks (I-Bridge<sup>®</sup>
2) before and after cyclic mechanical
loading</title>
<author><name sortKey="Dittmer, Marc Philipp" sort="Dittmer, Marc Philipp" uniqKey="Dittmer M" first="Marc Philipp" last="Dittmer">Marc Philipp Dittmer</name>
<affiliation wicri:level="1"><nlm:aff id="aff01"> PD Dr, Private Practice, Hannover, Germany.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Allemagne</country>
<wicri:regionArea> PD Dr, Private Practice, Hannover</wicri:regionArea>
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</author>
<author><name sortKey="Nensa, Moritz" sort="Nensa, Moritz" uniqKey="Nensa M" first="Moritz" last="Nensa">Moritz Nensa</name>
<affiliation wicri:level="1"><nlm:aff id="aff02"> Clinic for Maxillofacial Surgery, Plastic Surgery, Implant Center, Stuttgart, Germany.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Allemagne</country>
<wicri:regionArea> Clinic for Maxillofacial Surgery, Plastic Surgery, Implant Center, Stuttgart</wicri:regionArea>
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<author><name sortKey="Stiesch, Meike" sort="Stiesch, Meike" uniqKey="Stiesch M" first="Meike" last="Stiesch">Meike Stiesch</name>
<affiliation wicri:level="1"><nlm:aff id="aff03"> Professor Dr., Head of the Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Allemagne</country>
<wicri:regionArea> Professor Dr., Head of the Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Kohorst, Philipp" sort="Kohorst, Philipp" uniqKey="Kohorst P" first="Philipp" last="Kohorst">Philipp Kohorst</name>
<affiliation wicri:level="1"><nlm:aff id="aff04"> PD Dr., Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany.</nlm:aff>
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<wicri:regionArea> PD Dr., Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover</wicri:regionArea>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Load-bearing capacity of screw-retained CAD/CAM-produced titanium implant
frameworks (I-Bridge<sup>®</sup>
2) before and after cyclic mechanical
loading</title>
<author><name sortKey="Dittmer, Marc Philipp" sort="Dittmer, Marc Philipp" uniqKey="Dittmer M" first="Marc Philipp" last="Dittmer">Marc Philipp Dittmer</name>
<affiliation wicri:level="1"><nlm:aff id="aff01"> PD Dr, Private Practice, Hannover, Germany.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Allemagne</country>
<wicri:regionArea> PD Dr, Private Practice, Hannover</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Nensa, Moritz" sort="Nensa, Moritz" uniqKey="Nensa M" first="Moritz" last="Nensa">Moritz Nensa</name>
<affiliation wicri:level="1"><nlm:aff id="aff02"> Clinic for Maxillofacial Surgery, Plastic Surgery, Implant Center, Stuttgart, Germany.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Allemagne</country>
<wicri:regionArea> Clinic for Maxillofacial Surgery, Plastic Surgery, Implant Center, Stuttgart</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Stiesch, Meike" sort="Stiesch, Meike" uniqKey="Stiesch M" first="Meike" last="Stiesch">Meike Stiesch</name>
<affiliation wicri:level="1"><nlm:aff id="aff03"> Professor Dr., Head of the Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Allemagne</country>
<wicri:regionArea> Professor Dr., Head of the Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Kohorst, Philipp" sort="Kohorst, Philipp" uniqKey="Kohorst P" first="Philipp" last="Kohorst">Philipp Kohorst</name>
<affiliation wicri:level="1"><nlm:aff id="aff04"> PD Dr., Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Allemagne</country>
<wicri:regionArea> PD Dr., Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover</wicri:regionArea>
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<series><title level="j">Journal of Applied Oral Science</title>
<idno type="ISSN">1678-7757</idno>
<idno type="eISSN">1678-7765</idno>
<imprint><date when="2013">2013</date>
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<front><div type="abstract" xml:lang="en"><p>Implant-supported screw-retained fixed dental prostheses (FDPs) produced by CAD/ CAM
have been introduced in recent years for the rehabilitation of partial or total
endentulous jaws. However, there is a lack of data about the long-term mechanical
characteristics.</p>
<sec><title>Objective</title>
<p>The aim of this study was to investigate the failure mode and the influence of
extended cyclic mechanical loading on the load-bearing capacity of these
frameworks.</p>
</sec>
<sec><title>Material and Methods</title>
<p>Ten five-unit FDP frameworks simulating a free-end situation in the mandibular jaw
were manufactured according to the I-Bridge<sup>®</sup>
2-concept
(I-Bridge<sup>®</sup>
2, Biomain AB, Helsingborg, Sweden) and each was
screw-retained on three differently angulated Astra Tech implants (30º buccal
angulation/0º angulation/30º lingual angulation). One half of the specimens was
tested for static load-bearing capacity without any further treatment (control),
whereas the other half underwent five million cycles of mechanical loading with
100 N as the upper load limit (test). All specimens were loaded until failure in a
universal testing machine with an occlusal force applied at the pontics.
Load-displacement curves were recorded and the failure mode was macro- and
microscopically analyzed. The statistical analysis was performed using a t-test
(p=0.05). </p>
</sec>
<sec><title>Results</title>
<p>All the specimens survived cyclic mechanical loading and no obvious failure could
be observed. Due to the cyclic mechanical loading, the load-bearing capacity
decreased from 8,496 N±196 N (control) to 7,592 N±901 N (test). The cyclic
mechanical loading did not significantly influence the load-bearing capacity
(p=0.060). The failure mode was almost identical in all specimens: large
deformations of the framework at the implant connection area were obvious. </p>
</sec>
<sec><title>Conclusion</title>
<p>The load-bearing capacity of the I-Bridge<sup>®</sup>
2 frameworks is much higher
than the clinically relevant occlusal forces, even with considerably angulated
implants. However, the performance under functional loading <italic>in
vivo</italic>
depends on additional aspects. Further studies are needed to
address these aspects.</p>
</sec>
</div>
</front>
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<pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<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>
<journal-title-group><journal-title>Journal of Applied Oral Science</journal-title>
</journal-title-group>
<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>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">24037068</article-id>
<article-id pub-id-type="pmc">3881892</article-id>
<article-id pub-id-type="doi">10.1590/1679-775720130077</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Original Articles</subject>
</subj-group>
</article-categories>
<title-group><article-title>Load-bearing capacity of screw-retained CAD/CAM-produced titanium implant
frameworks (I-Bridge<sup>®</sup>
2) before and after cyclic mechanical
loading</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>DITTMER</surname>
<given-names>Marc Philipp</given-names>
</name>
<xref ref-type="aff" rid="aff01">1</xref>
<xref ref-type="corresp" rid="c01"></xref>
</contrib>
<contrib contrib-type="author"><name><surname>NENSA</surname>
<given-names>Moritz</given-names>
</name>
<xref ref-type="aff" rid="aff02">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>STIESCH</surname>
<given-names>Meike</given-names>
</name>
<xref ref-type="aff" rid="aff03">3</xref>
</contrib>
<contrib contrib-type="author"><name><surname>KOHORST</surname>
<given-names>Philipp</given-names>
</name>
<xref ref-type="aff" rid="aff04">4</xref>
</contrib>
</contrib-group>
<aff id="aff01"><label>1</label>
PD Dr, Private Practice, Hannover, Germany.</aff>
<aff id="aff02"><label>2</label>
Clinic for Maxillofacial Surgery, Plastic Surgery, Implant Center, Stuttgart, Germany.</aff>
<aff id="aff03"><label>3</label>
Professor Dr., Head of the Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany.</aff>
<aff id="aff04"><label>4</label>
PD Dr., Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany.</aff>
<author-notes><corresp id="c01"><bold>Corresponding address:</bold>
Marc Philipp Dittmer - Kleinertstr. 9 - 30627 -
Hannover - Germany - Phone: +49 (0) 511 7602151 - e-mail:
<email>marc@drdittmer.de</email>
</corresp>
</author-notes>
<pub-date pub-type="ppub"><season>Jul-Aug</season>
<year>2013</year>
</pub-date>
<volume>21</volume>
<issue>4</issue>
<fpage>307</fpage>
<lpage>313</lpage>
<history><date date-type="received"><day>16</day>
<month>1</month>
<year>2013</year>
</date>
<date date-type="rev-recd"><day>26</day>
<month>3</month>
<year>2013</year>
</date>
<date date-type="accepted"><day>10</day>
<month>5</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><p>Implant-supported screw-retained fixed dental prostheses (FDPs) produced by CAD/ CAM
have been introduced in recent years for the rehabilitation of partial or total
endentulous jaws. However, there is a lack of data about the long-term mechanical
characteristics.</p>
<sec><title>Objective</title>
<p>The aim of this study was to investigate the failure mode and the influence of
extended cyclic mechanical loading on the load-bearing capacity of these
frameworks.</p>
</sec>
<sec><title>Material and Methods</title>
<p>Ten five-unit FDP frameworks simulating a free-end situation in the mandibular jaw
were manufactured according to the I-Bridge<sup>®</sup>
2-concept
(I-Bridge<sup>®</sup>
2, Biomain AB, Helsingborg, Sweden) and each was
screw-retained on three differently angulated Astra Tech implants (30º buccal
angulation/0º angulation/30º lingual angulation). One half of the specimens was
tested for static load-bearing capacity without any further treatment (control),
whereas the other half underwent five million cycles of mechanical loading with
100 N as the upper load limit (test). All specimens were loaded until failure in a
universal testing machine with an occlusal force applied at the pontics.
Load-displacement curves were recorded and the failure mode was macro- and
microscopically analyzed. The statistical analysis was performed using a t-test
(p=0.05). </p>
</sec>
<sec><title>Results</title>
<p>All the specimens survived cyclic mechanical loading and no obvious failure could
be observed. Due to the cyclic mechanical loading, the load-bearing capacity
decreased from 8,496 N±196 N (control) to 7,592 N±901 N (test). The cyclic
mechanical loading did not significantly influence the load-bearing capacity
(p=0.060). The failure mode was almost identical in all specimens: large
deformations of the framework at the implant connection area were obvious. </p>
</sec>
<sec><title>Conclusion</title>
<p>The load-bearing capacity of the I-Bridge<sup>®</sup>
2 frameworks is much higher
than the clinically relevant occlusal forces, even with considerably angulated
implants. However, the performance under functional loading <italic>in
vivo</italic>
depends on additional aspects. Further studies are needed to
address these aspects.</p>
</sec>
</abstract>
<kwd-group><kwd>Dental implants</kwd>
<kwd>Implant-supported dental prosthesis</kwd>
<kwd>Dental implant-abutment connection</kwd>
</kwd-group>
<funding-group><award-group><funding-source>Biomain</funding-source>
</award-group>
</funding-group>
</article-meta>
</front>
</pmc>
</record>
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