Alignment of Occlusion I Flashcards
True or False? A mouth opens and closes around a fixed point within the condyle and occurs within the inferior cavity of the joint. This movement happens in all 3 planes.
True
True or False? Rotational movement happens in all 3 planes.
True
The movement of a body around an axis is called ______.
rotational movement
Opening and closing motion of the mandible is called ______.
Horizontal axis of rotation
What type of rotation is referred to as hinge movement?
horizontal axis of rotation
When the condyle moves anteriorly out of the terminal hinge position it is referred to as ______.
frontal axis of rotation
In frontal axis of rotation, the condyle stays in the terminal hinge position because of the ligaments and musculature of the ______.
TMJ
True or False? Frontal axis of rotation occurs in conjunction with other eccentric movement.
True
What is the movement of the condyles, teeth, and mandible in the same direction?
Translational movements
What is the forward movement of the mandible?
protrusion
True or False? Translational movements happen within the superior cavity of the joint between the superior surface of the disc and the inferior border of the articular fossa.
True
Translation happens simultaneously with ______.
rotation
What movements are limited by the ligaments and the articular surfaces of the TMJ?
single plane movements
True or False? Single plane movements are influenced by morphology and alignment of the teeth.
True
_____ occurs when the mandible moves through the outer range of motion, reproducible describable limits called border movement results.
Single plane movements
