Analysis of masticatory muscle condition using the 4-dimensional muscle model for a patient with Square Mandible

Yuhko Shigeta, Takumi Ogawa, Eriko Ando, Shunji Fukushima, Naoki Suzuki, Yoshito Otake, Asaki Hattori

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The present study was conducted to ascertain characteristics of mandibular movements in patients with SQM, observe the kinetics of masticatory muscles using a four-dimensional (4D) muscle model, and kinetically investigate the etiology of Square Mandible (SQM). As results, 1, In the maximum opening position, location of the condyle was beyond the articular tubercle for volunteer, but within the mandibular fossa for SQM patient. 2, While the temporal muscle of volunteer was markedly expanded, that of SQM patient was not. 3, In both volunteer and SQM during left lateral excursion, the right mandibular condyle moved to a position slightly before the lowest point of the articular tubercle. The 4D muscle model showed that the cause of limited mouth opening in SQM patient was insufficient expansion of the temporal muscle, and not dysfunction of the opening muscles. Insufficient expansion of the temporal muscle stresses the masseter muscle and leads to hypertrophy of the masseter muscle and hyperplasia of the mandibular angle, resulting in the unique facial configuration.

Original languageEnglish
Title of host publicationMedicine Meets Virtual Reality 13
Subtitle of host publicationThe Magical Next Becomes the Medical Now, MMVR 2005
PublisherIOS Press
Pages468-472
Number of pages5
ISBN (Print)1586034987, 9781586034986
Publication statusPublished - 2005
Externally publishedYes
Event13th Annual Conference on Medicine Meets Virtual Reality: The Magical Next Becomes the Medical Now, MMVR 2005 - Long Beach, CA, United States
Duration: 2005 Jan 262005 Jan 29

Publication series

NameStudies in Health Technology and Informatics
Volume111
ISSN (Print)0926-9630
ISSN (Electronic)1879-8365

Conference

Conference13th Annual Conference on Medicine Meets Virtual Reality: The Magical Next Becomes the Medical Now, MMVR 2005
CountryUnited States
CityLong Beach, CA
Period05/1/2605/1/29

ASJC Scopus subject areas

  • Biomedical Engineering
  • Health Informatics
  • Health Information Management

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    Shigeta, Y., Ogawa, T., Ando, E., Fukushima, S., Suzuki, N., Otake, Y., & Hattori, A. (2005). Analysis of masticatory muscle condition using the 4-dimensional muscle model for a patient with Square Mandible. In Medicine Meets Virtual Reality 13: The Magical Next Becomes the Medical Now, MMVR 2005 (pp. 468-472). (Studies in Health Technology and Informatics; Vol. 111). IOS Press.