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16 Cards in this Set
- Front
- Back
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Term used to describe influence of TMJ on mandibular movement Pathway of condyle point movement in the anterior and posterior position in the sagittal plane Condylar motion during chewing follows the? |
Condylar Guidance Articular Eminence |
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Shallow articular eminence requires? Steep articular eminence allows? |
Short cusps Steep cusps |
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Posselt's from the frontal plane using incisor point: IP to d is what kind of movement? |
laterotrusion movement |
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Condyle: frontal view Bodily side shift of the condyle that occurs during lateral movement? Natural looseness in the TMJ (1.5 mm of lateral shifting of the condyle)? -usually very small -What determines this? |
Bennett shift Immediate Bennet Shift -Determined by the distance from the medial pole of the condyle (nonworking side) to the medial wall of the temporal bone=condylar guidance |
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Posselt's Diagram: horizontal plane As the incisor point goes from IP to d, condylar point follows a? If an immediate shift is applied first, condylar point shows the path of which one? |
Progressive Bennett shift (2) 3 |
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Condylar Point in chewing: Observed motion of the __ during chewing as viewed in a horizontal plane |
Mediotrusive condyle (nonworking) |
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In the horizontal plane, the angle formed between the pathway of the mediotrusive condyle, and the sagittal plane is known as the? C-B is the? C-P is the? |
Bennett Angle Bennett shift Immediate Bennett shift |
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Effect of Immediate shift on cusps: A pronounced immediate Bennett shift or wide Bennett angle requires that cusps be? A shallow/gradual Bennett shift or narrow Bennett angle allows cusps to be? |
short longer |
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The influence of the medial wall of the temporal bone and the mediotrusive side on lateral movements of the mandible is called? What does this determine? |
Condylar Guidance Immediate Bennett Shift |
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Canine Guidance and Canine guided occlusion: Cuspid on the laterotrusive side guides the mandible and disoccludes the __ in the laterotrusive movement Coupled with condylar guidance |
Posterior Teeth |
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Premature contact is when one tooth hits more than the others resulting in? This will cause the jaw to deflect before allowing the rest of the teeth to occlude What does this do to the TMJ? -Also causes deflection in a posterior, anterior, and lateral direction |
More force for that one tooth Puts it in a stretched or abnormal position |
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TMJ stress causes damage to ligaments or muscles (often the joint affected is the one opposite to the side of the premature contact) What does this do to the muscles? |
Become tired, sore, and tender |
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Normal stress of occlusion is 300 psi In premature contact, the force extended to the offending cusp is? |
> 2000 psi |
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Protrusive interference is premature contact going from IP to protrusive Where does this occur? |
Mesial aspect of the mandibular posterior teeth and the distal aspect of the maxillary teeth |
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What also produces mandibular deviation or hinder smooth passage to and from intercuspal position? |
Occlusal interferences Lateral interferences (undesirable contact on the laterotrusive side) |
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Mediotrusive interference is undesirable contact on the mediotrusive side (nonworking side) Interferences are destructive in nature because of placement of forces outside the long axes of teeth! |
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