Incidence, types and clinical implications of a non-metrical variant--mylohyoid bridging in human mandibles.
Identifieur interne : 006701 ( Main/Exploration ); précédent : 006700; suivant : 006702Incidence, types and clinical implications of a non-metrical variant--mylohyoid bridging in human mandibles.
Auteurs : K. Narayana [Koweït] ; P. Narayan ; K. Ashwin ; L V PrabhuSource :
- Folia morphologica [ 0015-5659 ] ; 2007.
Descripteurs français
- KwdFr :
- MESH :
- anatomie et histologie : Mandibule, Os hyoïde.
- Adulte, Anthropométrie, Bouche édentée, Facteurs de l'âge, Humains, Incidence, Mâchoire partiellement édentée.
English descriptors
- KwdEn :
- MESH :
- anatomy & histology : Hyoid Bone, Mandible.
- Adult, Age Factors, Anthropometry, Humans, Incidence, Jaw, Edentulous, Partially, Mouth, Edentulous.
Abstract
Mylohyoid bridging (MB) is a non-metrical variant of the human mandible. The incidence and types of MB were investigated in 264 mandibles (edentulous 116, semi-dentulous 90 and dentulous 58). No mandible showed a complete type of MB, although 19 (7.2%) mandibles had a partial type. These were classified into two subtypes: distal partial (DP; Type I) and proximal partial (PP; Type II), depending on their location over the mylohyoid groove. The MB was present unilaterally in 7.76% of edentulous mandibles: right side 5.17% (3.45% PP type and 1.72% DP type) and left side 2.59% (1.72% PP type and 0.86% DP type). Of the semi-dentulous mandibles 3.33% had DP type of MB, 1.11% on the right side and 2.22% on the left side, and of the dentulous mandibles 1.72% had DP type of MB on the right side. A total of 13 mandibles out of 264 (4.92%) had unilateral MB. No dentulous mandible had bilateral MB, but 3.45% of edentulous and 2.22% of semi-dentulous mandibles did have. In total, 6 mandibles out of 264 bones (2.27%) had bilateral MB. Of the bilateral incidences 1.72% of edentulous mandibles had a DP-DP combination and the remaining 1.72% had a PP-DP combination. However, both instances of bilateral MB in semi-dentulous mandibles were of PP-DP combination. The incidence or types of MB showed no statistically significant differences between the groups or sides (p > 0.5; chi(2) test). In conclusion, the complete type of MB is a rare occurrence. The incidence increases with age, as edentulous mandibles had a higher incidence of MB than the other two groups. Clinically, MB may compress the mylohyoid neurovascular bundle, leading to neurological or vascular disorders.
PubMed: 17533590
Affiliations:
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Ashwin</name></author><author><name sortKey="Prabhu, L V" sort="Prabhu, L V" uniqKey="Prabhu L" first="L V" last="Prabhu">L V Prabhu</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2007">2007</date><idno type="RBID">pubmed:17533590</idno><idno type="pmid">17533590</idno><idno type="wicri:Area/PubMed/Corpus">002558</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">002558</idno><idno type="wicri:Area/PubMed/Curation">002558</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">002558</idno><idno type="wicri:Area/PubMed/Checkpoint">002558</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">002558</idno><idno type="wicri:Area/Ncbi/Merge">001C89</idno><idno type="wicri:Area/Ncbi/Curation">001C89</idno><idno type="wicri:Area/Ncbi/Checkpoint">001C89</idno><idno type="wicri:doubleKey">0015-5659:2007:Narayana K:incidence:types:and</idno><idno type="wicri:Area/Main/Merge">006798</idno><idno type="wicri:Area/Main/Curation">006701</idno><idno type="wicri:Area/Main/Exploration">006701</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Incidence, types and clinical implications of a non-metrical variant--mylohyoid bridging in human mandibles.</title><author><name sortKey="Narayana, K" sort="Narayana, K" uniqKey="Narayana K" first="K" last="Narayana">K. Narayana</name><affiliation wicri:level="1"><nlm:affiliation>Department of Anatomy, Faculty of Medicine, HSC, Kuwait University, Safat, Kuwait. narayana68@yahoo.com</nlm:affiliation><country xml:lang="fr">Koweït</country><wicri:regionArea>Department of Anatomy, Faculty of Medicine, HSC, Kuwait University, Safat</wicri:regionArea><wicri:noRegion>Safat</wicri:noRegion></affiliation></author><author><name sortKey="Narayan, P" sort="Narayan, P" uniqKey="Narayan P" first="P" last="Narayan">P. Narayan</name></author><author><name sortKey="Ashwin, K" sort="Ashwin, K" uniqKey="Ashwin K" first="K" last="Ashwin">K. Ashwin</name></author><author><name sortKey="Prabhu, L V" sort="Prabhu, L V" uniqKey="Prabhu L" first="L V" last="Prabhu">L V Prabhu</name></author></analytic><series><title level="j">Folia morphologica</title><idno type="ISSN">0015-5659</idno><imprint><date when="2007" type="published">2007</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term><term>Age Factors</term><term>Anthropometry</term><term>Humans</term><term>Hyoid Bone (anatomy & histology)</term><term>Incidence</term><term>Jaw, Edentulous, Partially</term><term>Mandible (anatomy & histology)</term><term>Mouth, Edentulous</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Adulte</term><term>Anthropométrie</term><term>Bouche édentée</term><term>Facteurs de l'âge</term><term>Humains</term><term>Incidence</term><term>Mandibule (anatomie et histologie)</term><term>Mâchoire partiellement édentée</term><term>Os hyoïde (anatomie et histologie)</term></keywords><keywords scheme="MESH" qualifier="anatomie et histologie" xml:lang="fr"><term>Mandibule</term><term>Os hyoïde</term></keywords><keywords scheme="MESH" qualifier="anatomy & histology" xml:lang="en"><term>Hyoid Bone</term><term>Mandible</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adult</term><term>Age Factors</term><term>Anthropometry</term><term>Humans</term><term>Incidence</term><term>Jaw, Edentulous, Partially</term><term>Mouth, Edentulous</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Adulte</term><term>Anthropométrie</term><term>Bouche édentée</term><term>Facteurs de l'âge</term><term>Humains</term><term>Incidence</term><term>Mâchoire partiellement édentée</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Mylohyoid bridging (MB) is a non-metrical variant of the human mandible. The incidence and types of MB were investigated in 264 mandibles (edentulous 116, semi-dentulous 90 and dentulous 58). No mandible showed a complete type of MB, although 19 (7.2%) mandibles had a partial type. These were classified into two subtypes: distal partial (DP; Type I) and proximal partial (PP; Type II), depending on their location over the mylohyoid groove. The MB was present unilaterally in 7.76% of edentulous mandibles: right side 5.17% (3.45% PP type and 1.72% DP type) and left side 2.59% (1.72% PP type and 0.86% DP type). Of the semi-dentulous mandibles 3.33% had DP type of MB, 1.11% on the right side and 2.22% on the left side, and of the dentulous mandibles 1.72% had DP type of MB on the right side. A total of 13 mandibles out of 264 (4.92%) had unilateral MB. No dentulous mandible had bilateral MB, but 3.45% of edentulous and 2.22% of semi-dentulous mandibles did have. In total, 6 mandibles out of 264 bones (2.27%) had bilateral MB. Of the bilateral incidences 1.72% of edentulous mandibles had a DP-DP combination and the remaining 1.72% had a PP-DP combination. However, both instances of bilateral MB in semi-dentulous mandibles were of PP-DP combination. The incidence or types of MB showed no statistically significant differences between the groups or sides (p > 0.5; chi(2) test). In conclusion, the complete type of MB is a rare occurrence. The incidence increases with age, as edentulous mandibles had a higher incidence of MB than the other two groups. Clinically, MB may compress the mylohyoid neurovascular bundle, leading to neurological or vascular disorders.</div></front></TEI><affiliations><list><country><li>Koweït</li></country></list><tree><noCountry><name sortKey="Ashwin, K" sort="Ashwin, K" uniqKey="Ashwin K" first="K" last="Ashwin">K. Ashwin</name><name sortKey="Narayan, P" sort="Narayan, P" uniqKey="Narayan P" first="P" last="Narayan">P. Narayan</name><name sortKey="Prabhu, L V" sort="Prabhu, L V" uniqKey="Prabhu L" first="L V" last="Prabhu">L V Prabhu</name></noCountry><country name="Koweït"><noRegion><name sortKey="Narayana, K" sort="Narayana, K" uniqKey="Narayana K" first="K" last="Narayana">K. Narayana</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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