Effect of Polyvinyl Siloxane Viscosity on Accuracy of Dental Implant Impressions
Identifieur interne : 007148 ( Ncbi/Curation ); précédent : 007147; suivant : 007149Effect of Polyvinyl Siloxane Viscosity on Accuracy of Dental Implant Impressions
Auteurs : Ahmad Ghahremanloo [Iran] ; Mahdieh Seifi [Iran] ; Jalil Ghanbarzade [Iran] ; Seyyed Mohammad Abrisham [Iran] ; Rashid Abdolah Javan [Iran]Source :
- Journal of Dentistry (Tehran, Iran) [ 1735-2150 ] ; 2017.
Abstract
The aim of this study was to compare the accuracy of dental implant impressions obtained by a combination of different impression techniques and viscosities of polyvinyl siloxane (PVS).
Four parallel fixtures were placed between mental foramina in a master model of lower dental arch. Three different viscosities (putty/light body, medium body/light body, and monophase: heavy body) and direct and indirect techniques (six groups) were used, and seven impressions were obtained from each group (n=42). To measure the accuracy of impressions, drift, horizontal, and vertical angles of the implants, as well as the hex rotation of the implants in casts were evaluated using a digitizer device (1μm accuracy), in comparison with master arch. Data were analyzed using five-factor two-way ANOVA and Tukey’s post-hoc test.
The accuracy of impressions was assessed and the results showed that direct technique was not significantly different from indirect technique (P>0.05). Also, there were no significant differences between the mentioned viscosities except for the horizontal angle (P=0.006).
Viscosity of impression materials is of high significance for the accuracy of dental impressions.
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PubMed: 28828016
PubMed Central: 5557995
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Effect of Polyvinyl Siloxane Viscosity on Accuracy of Dental Implant Impressions</title>
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<author><name sortKey="Seifi, Mahdieh" sort="Seifi, Mahdieh" uniqKey="Seifi M" first="Mahdieh" last="Seifi">Mahdieh Seifi</name>
<affiliation wicri:level="1"><nlm:aff id="AFF2">Assistant Professor of Prosthodontics Department, Mashhad Dental School, Mashhad University of Medical Sciences, Mashhad, Iran</nlm:aff>
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<series><title level="j">Journal of Dentistry (Tehran, Iran)</title>
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<front><div type="abstract" xml:lang="en"><sec><title>Objectives:</title>
<p>The aim of this study was to compare the accuracy of dental implant impressions obtained by a combination of different impression techniques and viscosities of polyvinyl siloxane (PVS).</p>
</sec>
<sec><title>Materials and Methods:</title>
<p>Four parallel fixtures were placed between mental foramina in a master model of lower dental arch. Three different viscosities (putty/light body, medium body/light body, and monophase: heavy body) and direct and indirect techniques (six groups) were used, and seven impressions were obtained from each group (n=42). To measure the accuracy of impressions, drift, horizontal, and vertical angles of the implants, as well as the hex rotation of the implants in casts were evaluated using a digitizer device (1μm accuracy), in comparison with master arch. Data were analyzed using five-factor two-way ANOVA and Tukey’s post-hoc test.</p>
</sec>
<sec><title>Results:</title>
<p>The accuracy of impressions was assessed and the results showed that direct technique was not significantly different from indirect technique (P>0.05). Also, there were no significant differences between the mentioned viscosities except for the horizontal angle (P=0.006).</p>
</sec>
<sec><title>Conclusions:</title>
<p>Viscosity of impression materials is of high significance for the accuracy of dental impressions.</p>
</sec>
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