An evaluation of relation between the relative parallelism of occlusal plane to ala-tragal line and variation in the angulation of Po-Na-ANS angle in dentulous subjects: A cephalometric study
Identifieur interne : 001438 ( Main/Exploration ); précédent : 001437; suivant : 001439An evaluation of relation between the relative parallelism of occlusal plane to ala-tragal line and variation in the angulation of Po-Na-ANS angle in dentulous subjects: A cephalometric study
Auteurs : Sanath Shetty [Inde] ; K. Kamalakanth Shenoy [Inde] ; Justin Ninan [Inde] ; Pranay Mahaseth [Inde]Source :
- The Journal of the Indian Prosthodontic Society [ 0972-4052 ] ; 2015.
Abstract
The aim was to evaluate if any correlation exists between variation in angulation of Po-Na-ANS angle and relative parallelism of the occlusal plane to the different tragal levels of the ear in dentulous subjects.
A total of 200 subjects were selected for the study. A custom made occlusal plane analyzer was used to determine the posterior point of the ala-tragal line. The lateral cephalogram was shot for each of the subjects. The points Porion, Nasion, and Anterior Nasal Spine were located and the angle formed between these points was measured.
Fischer's exact test was used to find the correlation between Po-Na-ANS angle and relative parallelism of the occlusal plane to the ala-tragal line at different tragal levels.
Statistical analysis showed no significant correlation between Po-Na-ANS angle and relative parallelism of an occlusal plane at different tragal levels, and an inferior point on the tragus was the most common.
Irrespective of variations in the Po-Na-ANS angle, no correlation exists between the variation in the angulations of Po-Na-ANS angle and the relative parallelism of occlusal plane to the ala-tragal line at different tragal levels. Furthermore, in a large number of subjects (54%), the occlusal plane was found parallel to a line joining the inferior border of the ala of the nose and the inferior part of the tragus.
Url:
DOI: 10.4103/0972-4052.159968
PubMed: 26929506
PubMed Central: 4762311
Affiliations:
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Kamalakanth Shenoy</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka, India</nlm:aff><country xml:lang="fr">Inde</country><wicri:regionArea>Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka</wicri:regionArea><wicri:noRegion>Karnataka</wicri:noRegion></affiliation></author><author><name sortKey="Ninan, Justin" sort="Ninan, Justin" uniqKey="Ninan J" first="Justin" last="Ninan">Justin Ninan</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka, India</nlm:aff><country xml:lang="fr">Inde</country><wicri:regionArea>Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka</wicri:regionArea><wicri:noRegion>Karnataka</wicri:noRegion></affiliation></author><author><name sortKey="Mahaseth, Pranay" sort="Mahaseth, Pranay" uniqKey="Mahaseth P" first="Pranay" last="Mahaseth">Pranay Mahaseth</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka, India</nlm:aff><country xml:lang="fr">Inde</country><wicri:regionArea>Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka</wicri:regionArea><wicri:noRegion>Karnataka</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">26929506</idno><idno type="pmc">4762311</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4762311</idno><idno type="RBID">PMC:4762311</idno><idno type="doi">10.4103/0972-4052.159968</idno><date when="2015">2015</date><idno type="wicri:Area/Pmc/Corpus">000694</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000694</idno><idno type="wicri:Area/Pmc/Curation">000694</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000694</idno><idno type="wicri:Area/Pmc/Checkpoint">001031</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">001031</idno><idno type="wicri:Area/Ncbi/Merge">006447</idno><idno type="wicri:Area/Ncbi/Curation">006447</idno><idno type="wicri:Area/Ncbi/Checkpoint">006447</idno><idno type="wicri:doubleKey">0972-4052:2015:Shetty S:an:evaluation:of</idno><idno type="wicri:Area/Main/Merge">001441</idno><idno type="wicri:Area/Main/Curation">001438</idno><idno type="wicri:Area/Main/Exploration">001438</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">An evaluation of relation between the relative parallelism of occlusal plane to ala-tragal line and variation in the angulation of Po-Na-ANS angle in dentulous subjects: A cephalometric study</title><author><name sortKey="Shetty, Sanath" sort="Shetty, Sanath" uniqKey="Shetty S" first="Sanath" last="Shetty">Sanath Shetty</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka, India</nlm:aff><country xml:lang="fr">Inde</country><wicri:regionArea>Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka</wicri:regionArea><wicri:noRegion>Karnataka</wicri:noRegion></affiliation></author><author><name sortKey="Shenoy, K Kamalakanth" sort="Shenoy, K Kamalakanth" uniqKey="Shenoy K" first="K. Kamalakanth" last="Shenoy">K. Kamalakanth Shenoy</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka, India</nlm:aff><country xml:lang="fr">Inde</country><wicri:regionArea>Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka</wicri:regionArea><wicri:noRegion>Karnataka</wicri:noRegion></affiliation></author><author><name sortKey="Ninan, Justin" sort="Ninan, Justin" uniqKey="Ninan J" first="Justin" last="Ninan">Justin Ninan</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka, India</nlm:aff><country xml:lang="fr">Inde</country><wicri:regionArea>Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka</wicri:regionArea><wicri:noRegion>Karnataka</wicri:noRegion></affiliation></author><author><name sortKey="Mahaseth, Pranay" sort="Mahaseth, Pranay" uniqKey="Mahaseth P" first="Pranay" last="Mahaseth">Pranay Mahaseth</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka, India</nlm:aff><country xml:lang="fr">Inde</country><wicri:regionArea>Department of Prosthodontics, Yenepoya Dental College, Mangalore, Karnataka</wicri:regionArea><wicri:noRegion>Karnataka</wicri:noRegion></affiliation></author></analytic><series><title level="j">The Journal of the Indian Prosthodontic Society</title><idno type="ISSN">0972-4052</idno><idno type="eISSN">1998-4057</idno><imprint><date when="2015">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec id="st1"><title>Aims:</title><p>The aim was to evaluate if any correlation exists between variation in angulation of Po-Na-ANS angle and relative parallelism of the occlusal plane to the different tragal levels of the ear in dentulous subjects.</p></sec><sec id="st2"><title>Methodology:</title><p>A total of 200 subjects were selected for the study. A custom made occlusal plane analyzer was used to determine the posterior point of the ala-tragal line. The lateral cephalogram was shot for each of the subjects. The points Porion, Nasion, and Anterior Nasal Spine were located and the angle formed between these points was measured.</p></sec><sec id="st3"><title>Statistical Analysis Used:</title><p>Fischer's exact test was used to find the correlation between Po-Na-ANS angle and relative parallelism of the occlusal plane to the ala-tragal line at different tragal levels.</p></sec><sec id="st4"><title>Results:</title><p>Statistical analysis showed no significant correlation between Po-Na-ANS angle and relative parallelism of an occlusal plane at different tragal levels, and an inferior point on the tragus was the most common.</p></sec><sec id="st5"><title>Conclusion:</title><p>Irrespective of variations in the Po-Na-ANS angle, no correlation exists between the variation in the angulations of Po-Na-ANS angle and the relative parallelism of occlusal plane to the ala-tragal line at different tragal levels. Furthermore, in a large number of subjects (54%), the occlusal plane was found parallel to a line joining the inferior border of the ala of the nose and the inferior part of the tragus.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Hall, Wa" uniqKey="Hall W">WA Hall</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Shetty, S" uniqKey="Shetty S">S Shetty</name></author><author><name sortKey="Zargar, Nm" uniqKey="Zargar N">NM Zargar</name></author><author><name sortKey="Shenoy, K" uniqKey="Shenoy K">K Shenoy</name></author><author><name sortKey="Rekha, V" uniqKey="Rekha V">V Rekha</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ghosn, Ca" uniqKey="Ghosn C">CA Ghosn</name></author><author><name sortKey="Zogheib, C" uniqKey="Zogheib C">C Zogheib</name></author><author><name sortKey="Makzoume, Je" uniqKey="Makzoume J">JE 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Kamalakanth" last="Shenoy">K. Kamalakanth Shenoy</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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