Influence of the intergonial distance on image distortion in panoramic radiographs
Identifieur interne : 003B71 ( Ncbi/Curation ); précédent : 003B70; suivant : 003B72Influence of the intergonial distance on image distortion in panoramic radiographs
Auteurs : Dbs Ladeira [Brésil] ; Ad Cruz [Brésil] ; Sm Almeida [Brésil] ; Fn B Scolo [Brésil]Source :
- Dentomaxillofacial Radiology [ 0250-832X ] ; 2012.
Abstract
The aim of this study was to evaluate the influence of the intergonial distance during the formation of panoramic radiographic images by means of horizontal and vertical measurements.
30 macerated mandibles were categorized into 3 different groups (
In all three groups magnification of the distances between spheres was observed when compared with the real distance in both horizontal and vertical measurements (
The intergonial distance is a factor that had no influence on image formation in the panoramic radiograph.
Url:
DOI: 10.1259/dmfr/59761876
PubMed: 22282504
PubMed Central: 3520349
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<country xml:lang="fr">Brésil</country>
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<affiliation wicri:level="3"><nlm:aff id="aff1"><addr-line>Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil</addr-line>
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<author><name sortKey="Cruz, Ad" sort="Cruz, Ad" uniqKey="Cruz A" first="Ad" last="Cruz">Ad Cruz</name>
<affiliation wicri:level="3"><nlm:aff id="aff2"><addr-line>Department of Specific Formation, Area of Radiology, Dental School of the Fluminense Federal University, University Polo of Nova Friburgo, Rio de Janeiro, Brazil</addr-line>
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<country xml:lang="fr">Brésil</country>
<wicri:regionArea>Department of Specific Formation, Area of Radiology, Dental School of the Fluminense Federal University, University Polo of Nova Friburgo, Rio de Janeiro</wicri:regionArea>
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<affiliation wicri:level="3"><nlm:aff id="aff1"><addr-line>Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil</addr-line>
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<wicri:regionArea>Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, São Paulo</wicri:regionArea>
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<affiliation wicri:level="3"><nlm:aff id="aff1"><addr-line>Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil</addr-line>
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<placeName><settlement type="city">São Paulo</settlement>
<region type="state">État de São Paulo</region>
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<series><title level="j">Dentomaxillofacial Radiology</title>
<idno type="ISSN">0250-832X</idno>
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<front><div type="abstract" xml:lang="en"><sec><title>Objectives</title>
<p>The aim of this study was to evaluate the influence of the intergonial distance during the formation of panoramic radiographic images by means of horizontal and vertical measurements.</p>
</sec>
<sec><title>Methods</title>
<p>30 macerated mandibles were categorized into 3 different groups (<italic>n</italic>
= 10) according to their intergonial distances as follows: G1, mean distance 8.2 cm, G2, mean distance 9.0 cm and G3, mean distance 9.6 cm. Three metal spheres 0.198 cm in diameter and placed at an incline using an isosceles triangle were separately placed over the internal and external surfaces of the mandibles before radiographic exposure for the purpose of taking the horizontal and vertical measurements. The occlusal planes of the mandibles were horizontally placed on the chin rest of the panoramic machine Orthopantomograph® OP 100 (Instrumentarium Imaging, Tuusula, Finland) and were then radiographed. In the panoramic radiographs, an expert radiologist measured the distances between the metal spheres in the horizontal and vertical directions using a digital caliper. The data were tabled and statistically analysed by Student's <italic>t</italic>
-test and analysis of variance with Tukey post-test (α = 0.05).</p>
</sec>
<sec><title>Results</title>
<p>In all three groups magnification of the distances between spheres was observed when compared with the real distance in both horizontal and vertical measurements (<italic>p</italic>
< 0.05). Differences in both horizontal and vertical measurements were observed between the different regions (<italic>p</italic>
< 0.05), however there were no differences between groups in the same region (<italic>p</italic>
> 0.05). Differences between horizontal and vertical measurements were observed in different regions in all evaluated groups (<italic>p</italic>
< 0.05).</p>
</sec>
<sec><title>Conclusion</title>
<p>The intergonial distance is a factor that had no influence on image formation in the panoramic radiograph.</p>
</sec>
</div>
</front>
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