Assessment of Antero-Posterior Skeletal and Soft Tissue Relationships of Adult Indian Subjects in Natural Head Position and Centric Relation
Identifieur interne : 001409 ( Main/Exploration ); précédent : 001408; suivant : 001410Assessment of Antero-Posterior Skeletal and Soft Tissue Relationships of Adult Indian Subjects in Natural Head Position and Centric Relation
Auteurs : Vishnu Ben Latif [Inde] ; Rohan Rai [Inde] ; Gautham Hegde [Inde] ; Shabna Shajahan [Inde]Source :
- Journal of International Oral Health : JIOH [ 0976-7428 ] ; 2015.
Abstract
The aim of this study was to verify the intra-individual reproducibility of natural head position (NHP) in centric relation (CR) position, to prove the inter-individual differences in the Frankfort horizontal plane and sella-nasion line compared with the true horizontal line, and to establish linear norms from A-point, B-point, Pog as well as soft tissue A-point, soft tissue B-point, and soft tissue Pog to nasion true vertical line (NTVL) in adult Indian subjects.
Lateral cephalograms (T1) of Angle’s Class I subjects were taken in NHP and with bite in CR. A second lateral cephalogram (T2) of these subjects with ANB angle in the range 1-4° were taken after 1 week using the same wax bite and both the radiographs were analyzed based on six angular parameters using cephalometric software (Do-it, Dental studio NX version 4.1) to assess the reproducibility of NHP. Linear values of six landmarks were taken in relation to NTVL, and the mean values were calculated. A total of 116 subjects were included in this study.
When the cephalometric values of T1 and T2 were analyzed, it was found that, the parameters showed a
The study proved that NHP is a reproducible and accurate when recorded with the mandible in CR. Linear norms for skeletal Class I subjects in relation to NTVL were established.
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PubMed: 26124598
PubMed Central: 4479772
Affiliations:
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id="aff1">Postgraduate Student, Department of Orthodontics and Dentofacial Orthopaedics, A.J Institute of Dental Sciences, Mangalore, Karnataka, India</nlm:aff><country xml:lang="fr">Inde</country><wicri:regionArea>Postgraduate Student, Department of Orthodontics and Dentofacial Orthopaedics, A.J Institute of Dental Sciences, Mangalore, Karnataka</wicri:regionArea><wicri:noRegion>Karnataka</wicri:noRegion></affiliation></author><author><name sortKey="Rai, Rohan" sort="Rai, Rohan" uniqKey="Rai R" first="Rohan" last="Rai">Rohan Rai</name><affiliation wicri:level="1"><nlm:aff id="aff3">Professor & Head, Department of Orthodontics and Dentofacial Orthopaedics, A.J Institute of Dental Sciences, Mangalore, Karnataka, India</nlm:aff><country xml:lang="fr">Inde</country><wicri:regionArea>Professor & Head, Department of Orthodontics and Dentofacial Orthopaedics, A.J Institute of Dental Sciences, Mangalore, Karnataka</wicri:regionArea><wicri:noRegion>Karnataka</wicri:noRegion></affiliation></author><author><name sortKey="Hegde, Gautham" sort="Hegde, Gautham" uniqKey="Hegde G" first="Gautham" last="Hegde">Gautham Hegde</name><affiliation wicri:level="1"><nlm:aff id="aff2">Reader, Department of Orthodontics and Dentofacial Orthopaedics, AJ Institute of Dental Sciences, Mangalore, Karnataka, India</nlm:aff><country xml:lang="fr">Inde</country><wicri:regionArea>Reader, Department of Orthodontics and Dentofacial Orthopaedics, AJ Institute of Dental Sciences, Mangalore, Karnataka</wicri:regionArea><wicri:noRegion>Karnataka</wicri:noRegion></affiliation></author><author><name sortKey="Shajahan, Shabna" sort="Shajahan, Shabna" uniqKey="Shajahan S" first="Shabna" last="Shajahan">Shabna Shajahan</name><affiliation wicri:level="1"><nlm:aff id="aff4">Intern, PMS College of Dental Science and Research, Vattappara, Thiruvananthapuram, Kerala, India</nlm:aff><country xml:lang="fr">Inde</country><wicri:regionArea>Intern, PMS College of Dental Science and Research, Vattappara, Thiruvananthapuram, Kerala</wicri:regionArea><wicri:noRegion>Kerala</wicri:noRegion></affiliation></author></analytic><series><title level="j">Journal of International Oral Health : JIOH</title><idno type="ISSN">0976-7428</idno><idno type="eISSN">0976-1799</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>Background:</title><p>The aim of this study was to verify the intra-individual reproducibility of natural head position (NHP) in centric relation (CR) position, to prove the inter-individual differences in the Frankfort horizontal plane and sella-nasion line compared with the true horizontal line, and to establish linear norms from A-point, B-point, Pog as well as soft tissue A-point, soft tissue B-point, and soft tissue Pog to nasion true vertical line (NTVL) in adult Indian subjects.</p></sec><sec id="st2"><title>Methods:</title><p>Lateral cephalograms (T1) of Angle’s Class I subjects were taken in NHP and with bite in CR. A second lateral cephalogram (T2) of these subjects with ANB angle in the range 1-4° were taken after 1 week using the same wax bite and both the radiographs were analyzed based on six angular parameters using cephalometric software (Do-it, Dental studio NX version 4.1) to assess the reproducibility of NHP. Linear values of six landmarks were taken in relation to NTVL, and the mean values were calculated. A total of 116 subjects were included in this study.</p></sec><sec id="st3"><title>Results:</title><p>When the cephalometric values of T1 and T2 were analyzed, it was found that, the parameters showed a <italic>P</italic> < 0.001, indicating the reproducibility of NHP in CR. Mean values for point A, point B, Pog and their soft tissue counterparts were also obtained.</p></sec><sec id="st4"><title>Conclusion:</title><p>The study proved that NHP is a reproducible and accurate when recorded with the mandible in CR. Linear norms for skeletal Class I subjects in relation to NTVL were established.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Ahn, Jh" uniqKey="Ahn J">JH Ahn</name></author><author><name sortKey="Bae, Kh" uniqKey="Bae K">KH Bae</name></author><author><name sortKey="Park, Yj" uniqKey="Park Y">YJ Park</name></author><author><name sortKey="Hong, Rk" uniqKey="Hong R">RK Hong</name></author><author><name sortKey="Nam, Jh" uniqKey="Nam J">JH Nam</name></author><author><name sortKey="Kim, Mj" uniqKey="Kim M">MJ Kim</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Broca, M" uniqKey="Broca M">M Broca</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Moorrees, Cf" uniqKey="Moorrees C">CF Moorrees</name></author><author><name sortKey="Kean, Mr" uniqKey="Kean M">MR Kean</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Leitao, P" 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Kachooei</name></author></analytic></biblStruct></listBibl></div1></back></TEI><affiliations><list><country><li>Inde</li></country></list><tree><country name="Inde"><noRegion><name sortKey="Latif, Vishnu Ben" sort="Latif, Vishnu Ben" uniqKey="Latif V" first="Vishnu Ben" last="Latif">Vishnu Ben Latif</name></noRegion><name sortKey="Hegde, Gautham" sort="Hegde, Gautham" uniqKey="Hegde G" first="Gautham" last="Hegde">Gautham Hegde</name><name sortKey="Rai, Rohan" sort="Rai, Rohan" uniqKey="Rai R" first="Rohan" last="Rai">Rohan Rai</name><name sortKey="Shajahan, Shabna" sort="Shajahan, Shabna" uniqKey="Shajahan S" first="Shabna" last="Shajahan">Shabna Shajahan</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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