Abstract:
:The sagittal and frontal active envelope of border movement is applied regularly as a clinical tool in functional examinations of the human masticatory system. In contrast, the three-dimensional movement area has hardly been examined. Furthermore, the determinants of this area are not established unambiguously. In the present study, the three-dimensional envelope of incisor movement was predicted with a three-dimensional mathematical model of the human masticatory system, which included the morphology of the system and the fine architecture of its muscles. With this model, the influence of the temporomandibular ligaments and the passive muscle tensions on the envelope were estimated. The predicted three-dimensional active envelope of border movements was limited in horizontal directions, predominantly by the temporomandibular ligaments. The passive tensions of the masticatory muscles influenced, although marginally, its vertical extension. It appeared unlikely that, in a normal situation, active muscle tensions (casu quo muscle reflexes) contribute to the shape of the envelope.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Koolstra JH,Naeije M,van Eijden TMdoi
10.1177/00220345010800100901keywords:
subject
Has Abstractpub_date
2001-10-01 00:00:00pages
1908-12issue
10eissn
0022-0345issn
1544-0591journal_volume
80pub_type
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