Controllability of the temporomandibular joint loading by musculation: an analysis using a two-dimensional static model incorporating a spring model of the articular disk

Itoh, Ken‐ichi; Hayashi, Tetsutaro; Muramoto, Akira; Miyakawa, Michio

doi:10.1109/iembs.1997.757092

Cited by 1 publication

(3 citation statements)

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“…The mandibular fossa and the condyle were both assumed to be rigid bodies. The standard contours for the mandibular fossa and condyle were determined by referring to Oishi 1 (1967) [13,15], and their numerical data were derived from the work of A. Muramoto (unpublished data of BS thesis in March 1997) as listed in Appendix 2. Here, the geometric data of the mandibular fossa and condyle were measured from the origin O of a reference orthogonal coordinate system O-XZ ( Fig.…”

Section: Measurement Of Emg and Bite-forcementioning

confidence: 99%

“…The TMJ disk was modeled as 24 compressive springs by referring to Shinozaki's method 2 (1992) [13,15]. The springs (nos.…”

Section: Measurement Of Emg and Bite-forcementioning

confidence: 99%

“…Previously reported magnitudes of TMJ loading, however, differ significantly from one another because of different simulated conditions such as jaw geometry and musculature. To avoid this problem, we have discarded the determination of the absolute magnitude of TMJ loading and, instead, focused on the variation of TMJ loading (magnitude and direction) resulting from the coordinated activities of the masticatory muscles [11][12][13][14][15] (see Appendix 1).…”

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Temporomandibular joint loading generated during bilateral static bites at molars and premolars

et al. 2006

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The aim of this study was to investigate the features of the loading vectors of the temporomandibular joint (TMJ) generated during bilateral static bites at the molars and at the premolars, and to determine the major factors affecting the difference between the two loading vectors. We computed the subjects' estimated and theoretical minimum TMJ loadings under the two different bite conditions by applying the subjects' bite-force and electromyographic (EMG) data to a two-dimensional (2D) standard model of the jaw based on a rigid-body spring model of the TMJ. For a molar bite, (1) the estimated loading vector was not equal to its theoretical minimum; (2) the TMJ-loading/bite-force ratio, describing the proportion of TMJ loading, was relatively small, 0.477 on average; and (3) the estimated loading vector pointed in the direction of the central part of the articular disk's intermediate zone. For a premolar bite, on the other hand, (1) the estimated loading vector was nearly equal to its theoretical minimum; (2) the TMJ-loading/bite-force ratio was relatively large, 0.904 on average; and (3) the estimated loading vector pointed at the superior portion of the articular disk's intermediate zone. The differences between the TMJ-loading vectors for molar and premolar bites originated primarily from changes in the bite-point location.

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Section: Measurement Of Emg and Bite-forcementioning

confidence: 99%

“…The TMJ disk was modeled as 24 compressive springs by referring to Shinozaki's method 2 (1992) [13,15]. The springs (nos.…”

Section: Measurement Of Emg and Bite-forcementioning

confidence: 99%

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confidence: 99%

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