Details

Autor(en) / Beteiligte

• Kubein-Meesenburg, D.
• Nägerl, H.
• Schwestka-Polly, R.
• Thieme, K.M.
• Fanghänel, J.
• Miehe, B.

Titel

Functional conditions of the mandible: theory and physiology

Ist Teil von

• Annals of anatomy, 1999, Vol.181 (1), p.27-32

Ort / Verlag

Germany: Elsevier GmbH

Erscheinungsjahr

1999

Quelle

MEDLINE

Beschreibungen/Notizen

• The functional conditions of the mandible are differentiated according to the number of kinematic degrees of freedom assigned to each mandibular movement. One degree of freedom: pro- and retrusive occlusal border movement. The interplay of the TMJs with the occluding teeth determines a compulsory course which corresponds to a 4-bar-chain guidance. 2 degrees of freedom: free sagittal mouth movement without tooth contact. Using graphic recordings of cyclic mandibular movements, the mobile hinge axis is identified as a mandibularly fixed line which is not directly categorized as a part of an anatomical structure. In the maxillary coordinate system, its movement describes a cylinder; sagittally, it describes a circle. The mandibular positions are clearly identifiable with 2 angles. The in vivo measurements show that neuromuscularly healthy systems supply the mandible with anticipatory guidance. 3 degrees of freedom: bolus function. The articular space in the TMJ is utilized.