Question 77 · LDEK · Occlusion
The retruded mandible contact position is a position of the mandible:
1) in which mandible is in the free occlusion position, that is a position acquired involuntarily, and the centre of its position is consistent with the midline;
2) is obtained due to retrusion of mandible and with delicate teeth occlusion;
3) in which adductor and retrusive muscles are in balance;
4) in which the heads of the mandible are symmetrically positioned in the joints with slight anterior and inferior displacement;
5) in which the articular discs are positioned on the heads of the mandible, and contact the surface of the articular fossae with their thinnest parts;
6) in which there is a limited possibility of lateral movements;
7) in which maximum intercuspation occurs.
The correct answer is:
2) is obtained due to retrusion of mandible and with delicate teeth occlusion;
3) in which adductor and retrusive muscles are in balance;
4) in which the heads of the mandible are symmetrically positioned in the joints with slight anterior and inferior displacement;
5) in which the articular discs are positioned on the heads of the mandible, and contact the surface of the articular fossae with their thinnest parts;
6) in which there is a limited possibility of lateral movements;
7) in which maximum intercuspation occurs.
The correct answer is:
- A. 2,3,5.
- B. 1,4,5,7.
- C. 2,3,6.
- D. 2,6.
- E. 1,7.
Hint
Distinguish the retruded position reached by guided retrusion from the habitual position of maximal intercuspation.
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