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21 Cards in this Set
- Front
- Back
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When we go into function, if you wanted to chew on the side how would your mandible move?
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mandible moves towards the right, and then back into centric occlusion as you chew over repeated cycles.
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Where is the area where the contact is being made during chewing?
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functional cusps are working. Lingual on the upper, buccal on the lower.
Non-functional is buccal on upper, lingual on lower. |
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Anterior guidance contacts, What direction is protrusive?
What direction is right lateral movement? Left lateral? |
away from the center.
Right lateral movement = toward the right. Left lateral movement - toward the left. |
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What is Bennett Movement?
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Bodily side shift of the mandible during lateral movements.
Based on amt, timing, and direction. The more medial the wall from the medial pole of the orbiting condyle, the greater will be the bennet movement (progressive side shift) the looser the TM ligament attached to the rotating condly, the greater will be the bennet movement (immediate side shift). |
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What side does the condyle move a lot during the chewing movement?
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The working side condyle does NOT move a lot. But, the NON working side does work a lot. The mandible simply moves toward the working side.
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Where is the center of movement during chewing?
Rotating condyle? Orbiting condyle? |
The working side condyle. = rotating condyle.
The oribiting condyle is the nonworking condyle. |
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what prevents the mandible from being pushed toward the other side?
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prevented by medial wall.
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What is typically the distance between movement of/ after rotational movement to maximum opening? And back to the fossa?
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about 10 to 15 mm on average
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What contact point would you see if there was a dot between M1 and P2 on the max upper right?
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Contact pt would be at mesial cusp of M1, and buccal cusp, tooth #30.
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What are the functional cusps for the upper? For the lower?
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1) lingual
2) buccal |
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Buccal cusps contact somewhere along the...
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central groove or between two teeth on the upper.
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What is the jaw that always move?
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The mandible. So the pathways we look at are due to mandible teeth moving, and we look at contact points on the maxillary teeth.
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Along what groove will the MB of tooth #30 move during protrusive movement?
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along the central groove of the maxillary teeth to which it opposes
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What happens if we switch chewing from right to left side?
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the working side condyle now becomes the rotating condyle, and everything will orbit around that.
ex. if we started on right, the right condyle is the RC. then we move the left, the left condyle becomes the RC. The MB cusp now takes an oblique pathway is a left lateral movement. The right side becomes the nonworking side. The functional cusp is now MB#19. |
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Between lower M1 and lower P2 on left, what tooth do we contact with on maxillary?
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we're on the opposing lingual cusp of maxillary P2 on left side (#13).
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What happens to the maxillary cusp during protrusive movement?
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it actually moves backward along the central groove of the lower molars.
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If we had a left lateral movement, how would the maxillary cusp move?
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It would move toward the right (lingual cusp of tooth #13 for example)
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What do all mandibular movements require?
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Rotational and translational movement on the condyle, except for the slight opening of the mouth along the hinge axis which doesn't require rotational movement.
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If the rotating condyle were on the pts right, what would the left side be? what kind of movement is this on the left side?
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left side is non working. this is a major translational movement, that follows the oblique pattern. aka its the orbiting condyle.
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During protrusive movement, what is the path of L cusp of #13?
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goes back
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What direction does #13 take if the mandbile moves in left lateral movement?
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#13 goes right, relative to the LL mandibular movement
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