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Article: Functional movements of putative jaw muscle insertions

TitleFunctional movements of putative jaw muscle insertions
Authors
Issue Date1995
Citation
Anatomical Record, 1995, v. 242 n. 2, p. 278-288 How to Cite?
AbstractBackground: The craniomandibular muscles control jaw position and forces at the teeth and temporomandibular joints, but little is known regarding their biomechanical behaviour during dynamic function. The objective of this study was to determine how jaw muscle insertions alter position during different jaw movements in living subjects. Methods: Computer 3D reconstruction of MR images and jaw-tracking were combined to permit the examination of movement with six degrees of freedom. Maximum mandibular opening, protrusive and laterotrusive positions were recorded in four subjects, and the translation and rotation of the putative insertions of masseter, temporal, medial, and lateral pterygoid muscles were measured. Results: The sizes and shapes of regional attachments varied markedly among subjects, and their displacement patterns were different in specific muscles. For instance, when the jaw closed to the dental intercuspal position from maximum gape, the region near the superior insertion site of the masseter moved backward and upward, whereas the region near the inferior insertion site displaced mainly forward. In three subjects, the jaw's rotational center during this act was ~26-34 mm below the mandibular condyles. Conclusions: Since the movements of each muscle part differ according to variations in the size and shape of insertion areas, individual musculoskeletal form, and patterns of jaw motion during function, the prediction of motion-related muscle mechanics in any one subject is unlikely to be possible without direct measurement of the motion of visualized muscle parts. The present study shows that this information can be obtained.
Persistent Identifierhttp://hdl.handle.net/10722/153913
ISSN
2004 Impact Factor: 3.147
2015 SCImago Journal Rankings: 0.741
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGoto, TKen_US
dc.contributor.authorLangenbach, GEJen_US
dc.contributor.authorKorioth, TWPen_US
dc.contributor.authorHagiwara, Men_US
dc.contributor.authorTonndorf, MLen_US
dc.contributor.authorHannam, AGen_US
dc.date.accessioned2012-08-08T08:22:15Z-
dc.date.available2012-08-08T08:22:15Z-
dc.date.issued1995en_US
dc.identifier.citationAnatomical Record, 1995, v. 242 n. 2, p. 278-288en_US
dc.identifier.issn0003-276Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/153913-
dc.description.abstractBackground: The craniomandibular muscles control jaw position and forces at the teeth and temporomandibular joints, but little is known regarding their biomechanical behaviour during dynamic function. The objective of this study was to determine how jaw muscle insertions alter position during different jaw movements in living subjects. Methods: Computer 3D reconstruction of MR images and jaw-tracking were combined to permit the examination of movement with six degrees of freedom. Maximum mandibular opening, protrusive and laterotrusive positions were recorded in four subjects, and the translation and rotation of the putative insertions of masseter, temporal, medial, and lateral pterygoid muscles were measured. Results: The sizes and shapes of regional attachments varied markedly among subjects, and their displacement patterns were different in specific muscles. For instance, when the jaw closed to the dental intercuspal position from maximum gape, the region near the superior insertion site of the masseter moved backward and upward, whereas the region near the inferior insertion site displaced mainly forward. In three subjects, the jaw's rotational center during this act was ~26-34 mm below the mandibular condyles. Conclusions: Since the movements of each muscle part differ according to variations in the size and shape of insertion areas, individual musculoskeletal form, and patterns of jaw motion during function, the prediction of motion-related muscle mechanics in any one subject is unlikely to be possible without direct measurement of the motion of visualized muscle parts. The present study shows that this information can be obtained.en_US
dc.languageengen_US
dc.relation.ispartofAnatomical Recorden_US
dc.subject.meshAdulten_US
dc.subject.meshBiomechanicsen_US
dc.subject.meshHumansen_US
dc.subject.meshMagnetic Resonance Imagingen_US
dc.subject.meshMaleen_US
dc.subject.meshMasticatory Muscles - Anatomy & Histology - Physiologyen_US
dc.subject.meshMovement - Physiologyen_US
dc.titleFunctional movements of putative jaw muscle insertionsen_US
dc.typeArticleen_US
dc.identifier.emailGoto, TK:gototk@hku.hken_US
dc.identifier.authorityGoto, TK=rp01434en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1002/ar.1092420218en_US
dc.identifier.pmid7668413en_US
dc.identifier.scopuseid_2-s2.0-0029029751en_US
dc.identifier.volume242en_US
dc.identifier.issue2en_US
dc.identifier.spage278en_US
dc.identifier.epage288en_US
dc.identifier.isiWOS:A1995RB01400017-
dc.identifier.scopusauthoridGoto, TK=7403938313en_US
dc.identifier.scopusauthoridLangenbach, GEJ=35545981800en_US
dc.identifier.scopusauthoridKorioth, TWP=6603669145en_US
dc.identifier.scopusauthoridHagiwara, M=16170479200en_US
dc.identifier.scopusauthoridTonndorf, ML=6506865257en_US
dc.identifier.scopusauthoridHannam, AG=7003996385en_US

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