The extension of horizontal axis of the condyles on both sides intersect at about which in front of the foramen magnum.()
A. 100-110 degrees angle
B. 110-125 degrees angle
C. 145-160 degrees angle
D. 150-165 degrees angle
E. None of the above is true.
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The thinnest part of the articular disk of TMJ is ()
A. The anterior band
B. The intermediate zone
C. The posterior band
D. The bilaminar zone
E. None of the above is true.
The ligaments of TMJ does NOT include ()
A. the temporomandibular ligament
B. the sphenomandibular ligament
C. the stylomandibular ligament
D. the pterygomandibular ligament
E. the lateral ligament
The articular disk of TMJ is surrounded by the articular capsule and divides the joint cavity into superior and inferior cavities. The feature is that ()
A. The articular disk is directly attached to the condyle.
B. The superior cavity is big and loose, and is called the sliding joint.
C. The superior and inferior cavities are interconnected.
D. The superior cavity is small and tight, and is called the hinge joint.
E. None of the above is true.
Where does attrition often occur? ()
A. The labial surface and occlusal surface
B. The incisal edge and occlusal surface
C. The incisal edge and the cervical section
D. The incisal ridge, the occlusal surface, and the proximal surfaces
E. None of the above.
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