EdenteV2, Istex, Corpus, bibRecord, 007553

Bone level changes at axial‐ and non‐axial‐positioned implants supporting fixed partial dentures. A 5‐year retrospective longitudinal study

Identifieur interne : 007553 ( Istex/Corpus ); précédent : 007552; suivant : 007554

Bone level changes at axial‐ and non‐axial‐positioned implants supporting fixed partial dentures. A 5‐year retrospective longitudinal study

Auteurs : Theofilos Koutouzis ; Jan L. Wennström

Source :

Clinical Oral Implants Research [ 0905-7161 ] ; 2007-10.

RBID : ISTEX:ECEE2B63794459D781370A7E2379E155B22F6BB5

English descriptors

Abstract

Aim: The aim of this study was to retrospectively analyze the potential influence of implant inclination on marginal bone loss at freestanding, implant‐supported, fixed partial dentures (FPDs) over a 5‐year period of functional loading.

Url:

https://api.istex.fr/document/ECEE2B63794459D781370A7E2379E155B22F6BB5/fulltext/pdf

DOI: 10.1111/j.1600-0501.2007.01386.x

Links to Exploration step

ISTEX:ECEE2B63794459D781370A7E2379E155B22F6BB5

Le document en format XML

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<title level="a" type="short">Axial‐ vs. non‐axial‐positioned implants</title>
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<profileDesc><abstract xml:lang="en" style="main"><head>Abstract</head>
<p><hi rend="bold">Aim: </hi>
 The aim of this study was to retrospectively analyze the potential influence of implant inclination on marginal bone loss at freestanding, implant‐supported, fixed partial dentures (FPDs) over a 5‐year period of functional loading.</p>
<p><hi rend="bold">Material and methods: </hi>
 The material comprised 38 periodontally treated, partially dentate patients with a total of 42 free‐standing FPDs supported by implants of the Astra Tech System<hi rend="superscript">®</hi>
. Mesio‐distal inclination of the implants in relation to a vertical axis perpendicular to the occlusal plane was measured with a protractor on standardized photographs of the master cast. The two tail quartiles of the distribution of the implants with regard to the implant inclination were defined as <hi rend="italic">axial</hi>
‐positioned (mean 2.4°; range 0–4°) and <hi rend="italic">non‐axial</hi>
‐positioned implants (mean 17.1°; range 11–30°), respectively. For FPDs supported by two implants, both the mesial–distal and buccal–lingual inter‐implant inclination was measured. The primary outcome variable was change in peri‐implant bone level from the time of FPD placement to the 5‐year follow‐up examination. Comparison between axial‐ and non‐axial‐positioned implants was performed by the use of a Mann–Whitney <hi rend="italic">U‐</hi>
test. Spearman's correlation analysis was used to analyze relationships between inter‐implant inclination (mesial–distal and buccal–lingual) and 5‐year bone level change on the FPD level.</p>
<p><hi rend="bold">Results: </hi>
 The 5‐year mean bone level change amounted to 0.4 mm (SD 0.97) for the axial and 0.5 mm (0.95) for non‐axial‐positioned implants (<hi rend="italic">P</hi>
>0.05). For the FPDs supported by two implants, the mean inter‐implant inclination was 9.2° (1–36°) in the mesial–distal direction and 6.7° (0–24°) in the buccal–lingual direction. Correlation analysis revealed lack of statistically significant correlation between inter‐implant inclination (mesial–distal and buccal–lingual) and 5‐year bone level change (<hi rend="italic">r</hi>
=−0.19 and <hi rend="italic">r</hi>
=−0.32, respectively).</p>
<p><hi rend="bold">Conclusion: </hi>
 The study failed to support the hypothesis that implant inclination has an effect on peri‐implant bone loss.</p>
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<doi origin="wiley" registered="yes">10.1111/(ISSN)1600-0501</doi>
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<titleGroup><title type="main" sort="CLINICAL ORAL IMPLANTS RESEARCH">Clinical Oral Implants Research</title>
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<titleGroup><title type="tocHeading1">Original articles</title>
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<correspondenceTo><b>Correspondence to:</b>
 
<i>Jan L. Wennström</i>
 Department of Periodontology Institute of Odontology The Sahlgrenska Academy at Göteborg University Box 450 SE 405 30 Göteborg Sweden Tel.: +46 31 7733189 Fax:+46 31 7733791 e‐mail: <email normalForm="wennstrom@odontologi.gu.se">wennstrom@odontologi.gu.se</email>
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<contentMeta><unparsedEditorialHistory><b>Date:</b>
 Accepted 10 August 2006</unparsedEditorialHistory>
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<titleGroup><title type="main">Bone level changes at axial‐ and non‐axial‐positioned implants supporting fixed partial dentures. A 5‐year retrospective longitudinal study</title>
<title type="shortAuthors">Koutouzis & Wennström.</title>
<title type="short">Axial‐ vs. non‐axial‐positioned implants</title>
</titleGroup>
<creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>Theofilos</givenNames>
<familyName>Koutouzis</familyName>
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<creator creatorRole="author" xml:id="cr2" affiliationRef="#a1"><personName><givenNames>Jan L.</givenNames>
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<keywordGroup xml:lang="en"><keyword xml:id="k1">bone loss</keyword>
<keyword xml:id="k2">fixed partial dentures</keyword>
<keyword xml:id="k3">loading</keyword>
<keyword xml:id="k4">oral implants</keyword>
</keywordGroup>
<abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title>
<p><b>Aim: </b>
 The aim of this study was to retrospectively analyze the potential influence of implant inclination on marginal bone loss at freestanding, implant‐supported, fixed partial dentures (FPDs) over a 5‐year period of functional loading.</p>
<p><b>Material and methods: </b>
 The material comprised 38 periodontally treated, partially dentate patients with a total of 42 free‐standing FPDs supported by implants of the Astra Tech System<sup>®</sup>
. Mesio‐distal inclination of the implants in relation to a vertical axis perpendicular to the occlusal plane was measured with a protractor on standardized photographs of the master cast. The two tail quartiles of the distribution of the implants with regard to the implant inclination were defined as <i>axial</i>
‐positioned (mean 2.4°; range 0–4°) and <i>non‐axial</i>
‐positioned implants (mean 17.1°; range 11–30°), respectively. For FPDs supported by two implants, both the mesial–distal and buccal–lingual inter‐implant inclination was measured. The primary outcome variable was change in peri‐implant bone level from the time of FPD placement to the 5‐year follow‐up examination. Comparison between axial‐ and non‐axial‐positioned implants was performed by the use of a Mann–Whitney <i>U‐</i>
test. Spearman's correlation analysis was used to analyze relationships between inter‐implant inclination (mesial–distal and buccal–lingual) and 5‐year bone level change on the FPD level.</p>
<p><b>Results: </b>
 The 5‐year mean bone level change amounted to 0.4 mm (SD 0.97) for the axial and 0.5 mm (0.95) for non‐axial‐positioned implants (<i>P</i>
>0.05). For the FPDs supported by two implants, the mean inter‐implant inclination was 9.2° (1–36°) in the mesial–distal direction and 6.7° (0–24°) in the buccal–lingual direction. Correlation analysis revealed lack of statistically significant correlation between inter‐implant inclination (mesial–distal and buccal–lingual) and 5‐year bone level change (<i>r</i>
=−0.19 and <i>r</i>
=−0.32, respectively).</p>
<p><b>Conclusion: </b>
 The study failed to support the hypothesis that implant inclination has an effect on peri‐implant bone loss.</p><!--

          
            To cite this article:
            

Koutouzis T, Wennström JL. Bone level changes at axial- and non-axial-positioned implants supporting fixed partial dentures. A 5-year retrospective longitudinal study.

Clin. Oral Impl. Res. 18, 2007; 585–590.

doi: 10.1111/j.1600-0501.2007.01386.x
        
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<abstract>Aim: The aim of this study was to retrospectively analyze the potential influence of implant inclination on marginal bone loss at freestanding, implant‐supported, fixed partial dentures (FPDs) over a 5‐year period of functional loading.</abstract>
<abstract>Material and methods: The material comprised 38 periodontally treated, partially dentate patients with a total of 42 free‐standing FPDs supported by implants of the Astra Tech System®. Mesio‐distal inclination of the implants in relation to a vertical axis perpendicular to the occlusal plane was measured with a protractor on standardized photographs of the master cast. The two tail quartiles of the distribution of the implants with regard to the implant inclination were defined as axial‐positioned (mean 2.4°; range 0–4°) and non‐axial‐positioned implants (mean 17.1°; range 11–30°), respectively. For FPDs supported by two implants, both the mesial–distal and buccal–lingual inter‐implant inclination was measured. The primary outcome variable was change in peri‐implant bone level from the time of FPD placement to the 5‐year follow‐up examination. Comparison between axial‐ and non‐axial‐positioned implants was performed by the use of a Mann–Whitney U‐test. Spearman's correlation analysis was used to analyze relationships between inter‐implant inclination (mesial–distal and buccal–lingual) and 5‐year bone level change on the FPD level.</abstract>
<abstract>Results: The 5‐year mean bone level change amounted to 0.4 mm (SD 0.97) for the axial and 0.5 mm (0.95) for non‐axial‐positioned implants (P>0.05). For the FPDs supported by two implants, the mean inter‐implant inclination was 9.2° (1–36°) in the mesial–distal direction and 6.7° (0–24°) in the buccal–lingual direction. Correlation analysis revealed lack of statistically significant correlation between inter‐implant inclination (mesial–distal and buccal–lingual) and 5‐year bone level change (r=−0.19 and r=−0.32, respectively).</abstract>
<abstract>Conclusion: The study failed to support the hypothesis that implant inclination has an effect on peri‐implant bone loss.</abstract>
<subject lang="en"><genre>keywords</genre>
<topic>bone loss</topic>
<topic>fixed partial dentures</topic>
<topic>loading</topic>
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Bone level changes at axial‐ and non‐axial‐positioned implants supporting fixed partial dentures. A 5‐year retrospective longitudinal study

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