- MeSH
- lidé MeSH
- ligamenta * anatomie a histologie MeSH
- temporomandibulární kloub * anatomie a histologie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH
- MeSH
- lidé MeSH
- nemoci temporomandibulárního kloubu * diagnostické zobrazování etiologie klasifikace terapie MeSH
- temporomandibulární kloub anatomie a histologie patologie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH
- MeSH
- discus articularis čelistního kloubu anatomie a histologie diagnostické zobrazování patologie MeSH
- lidé MeSH
- stárnutí MeSH
- syndrom temporomandibulárního kloubu diagnostické zobrazování patofyziologie patologie MeSH
- temporomandibulární kloub * anatomie a histologie patologie MeSH
- Check Tag
- lidé MeSH
The temporo-mandibular joint is a characteristic feature of mammalian development, and essential to mastication and speech, yet it causes more problems than any other joint in the body and remains the least understood. While it is generally accepted that the normal joint is loaded under compression, the problems and controversies surrounding this view remain unresolved and the disparity in opinion over its treatment continues. Although difficulties in the acquisition of reliable information have undoubtedly contributed to this situation, it is now considered that deficits in neural control and shortcomings in the underlying biomechanical theory and analysis have also played a part, and that a re-assessment from a different perspective could resolve these. Biotensegrity considers the TMJ from this position, where the mandible is suspended within a tensioned network that extends over a much wider anatomical field than is generally recognized and significant motion control is contained within the structure itself. It is an evolutionary-conserved arrangement that enables the system to rapidly respond to changing functional demands and provides a more complete model of joint physiology that can be used to guide further research.
The temporo-mandibular joint causes more problems than any other in the body and is the least understood with the high incidence of associated symptomatology remaining a major cause for concern. This lack of knowledge is partly due to the difficulties in acquiring information as it is not easy to access and practical and ethical constraints have ensured the almost complete absence of reliable in vivo data on joint loading and muscle forces. Whilst the issue of joint compression was debated throughout much of the twentieth-century, it is now considered that short-comings in the underlying biomechanical theory and analysis have contributed to this uncertainty and stifled progress, and that a reassessment of mandibular motion from a different perspective could resolve this.
- MeSH
- biologické modely MeSH
- biomechanika * MeSH
- discus articularis čelistního kloubu anatomie a histologie fyziologie MeSH
- kloubní ligamenta anatomie a histologie MeSH
- kosterní svaly anatomie a histologie MeSH
- lidé MeSH
- mechanický stres MeSH
- pevnost v tlaku MeSH
- temporomandibulární kloub * anatomie a histologie fyziologie MeSH
- ústní a čelistní systém MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH
Aim of this paper was to investigate the change in masticatory muscle forces and temporomandibular joint (TMJ) reaction forces simulated by inverse dynamics when thesteepness of the anterior fossa slope was varied. We used the model by de Zee et al. (2007) created in AnyBody™. The model was equipped with 24musculotendon actuators. Mandibular movement was governed by thetrajectory of theincisal point. The TMJ was modelled as a planar constraint canted 5°medially and thecaudal inclination relative to the occlusal plane was varied from 10° to 70°. Our models showed that for the two simulated movements (empty chewing and unilateral clenching) the joint reaction forces were smallest for the eminence inclination of 30° and 40° and highest for 70°. The muscle forces were relatively insensitive to change of the eminence inclination for the angles between 20° and 50°. This did not hold for the pterygoid muscle, for which the muscle forces increased continually with increasing fossa inclination. For empty chewing the muscle force reached smaller values than for clenching. During clenching, the muscle forces changed by up to 200N.
- MeSH
- dospělí MeSH
- lidé MeSH
- magnetická rezonanční tomografie MeSH
- mandibula anatomie a histologie fyziologie MeSH
- musculus pterygoideus fyziologie MeSH
- počítačová rentgenová tomografie MeSH
- síla skusu * MeSH
- temporomandibulární kloub anatomie a histologie fyziologie MeSH
- zubní modely MeSH
- žvýkací svaly fyziologie MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mužské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
Cílem této studie je zjistit informace o kinetických charakteristikách dolní čelisti a jejich kondylů určit, zda existují závislosti mezi sklonem kloubní dráhy a vybranými skeletálními a dentálními parametry u vyšetřených pacientů. Do souboru bylo vybráno 65 pacientů. Pro zjištění sklonu kloubní dráhy bylo u těchto pacientů provedeno axiografické vyšetření kloubních drah digitálním obličejovým obloukem ARCUS® digma. Nebyla nalezena statisticky významná korelace hodnoty sklonu kloubní dráhy s veŘíkálními a sagitálními charakteristikami obličejového skeletu, s hloubkou skusu a se sklonem dlouhé osy horních řezáků.
The aim of the study is to collect information on kinetic features of the mandible and its condyles, and to determine dependency between the joint path inclination and selected skeletal and dental parameters. The sample included 65 patients. To determine condylar path inclination in the patients, axiographic evaluation of condylar paths was performed using the digital facial arch ARCUS®digma. We did not prove statistically significant correlation between condylar path inclination and vertical and sagigittal features of facial bones, overbite, and upper incisors inclination.
- Klíčová slova
- axiografie, kloubní dráha,
- MeSH
- biomechanika fyziologie MeSH
- lidé MeSH
- temporomandibulární kloub * anatomie a histologie růst a vývoj MeSH
- Check Tag
- lidé MeSH
- MeSH
- lidé MeSH
- malokluze * klasifikace MeSH
- mandibula abnormality fyziologie patofyziologie MeSH
- mezičelistní vztahy * MeSH
- nemoci temporomandibulárního kloubu * MeSH
- temporomandibulární kloub * anatomie a histologie fyziologie patofyziologie MeSH
- zubní okluze MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- práce podpořená grantem MeSH
