Table of Contents
What are the movements of mandible?
[6] There are primarily 6 types of mandibular movement, including opening, closing, rightward jaw translation, leftward jaw translation, protrusion, and retrusion. Variability in jaw movement allows for mastication of different textures and consistencies.
What is lateral movement of teeth?
As the mandible moves laterally, the lower posterior teeth leave their centric contact with the upper teeth and travel sideways down a path dictated by the condyles in the back and by the lateral anterior guidance in the front.
What does Laterotrusion mean?
[ lăt′ə-rō-trōō′zhən ] n. The outward thrust given by the muscles of chewing to the condyle during movement of the mandible.
What is non working side?
NON WORKING MOVEMENT… also known as “Non working side” “Non functioning” “Balancing” “Contralateral” or “Orbiting side”. Refers to the side the mandible is moving away from.
What is translation movement of mandible?
Translation can be defined as a movement in which every point of the moving object simultaneously has the same direction and velocity. In the masticatory system, it occurs when the mandible moves forward, as in protrusion. The teeth, condyles, and rami all move in the same direction and to the same degree (Figure 4-5).
What are the two basic types of movement by the TMJ?
MOVEMENTS OF THE TMJ The basic anatomical function of the mandible is to: 1) open and close; 2) protrusion and retru- sion; and 3) lateral deviation which are provided through two types of basic movements. These movements are termed rotation and translation. Rotation occurs in the lower portion of the joint.
What is lateral excursion?
The sideways movement of the mandible from a centric position.
What is ICP in occlusion?
Intercuspal Position (ICP), also known as Habitual Bite, Habitual Position or Bite of Convenience , is defined at the position where the maxillary and mandibular teeth fit together in maximum interdigitation.
What are the two TMJ movements and where do they occur?
The temporomandibular articulation is unique in the body in that the two joints must always move simultaneously. Two distinct movements, rotation and translation, occur in the joint during mandibular opening and closing.