Exam 2 (Review slides 21-30)

Question 1

What is the most anterior point in a border movment in sagittal plane

Answer 1

Maximum protrusion

Question 2

In a border movement diagram of the frontal plane, what is the most superior and central point

Answer 2

Maximum intercuspation

Question 3

Most superior position is defined as what in mandibular movement traced at the condylar level?

Answer 3

Working

Question 4

As horizontal overlap increases, what happens to the anterior guidance angle?

Answer 4

It decreases

Question 5

An increase in horizontal overlap (diminished anterior guidance angle) results in what?

Answer 5

Results in less vertical displacement of the mandible and flatter posterior cusps

Question 6

T or F, The nearer a point is to a controlling factor, the more its movement is controlled by that factor

Answer 6

True, So some teeth are more affected. If the anterior controlling factor is changed, the most anterior posterior tooth will be affected most

Question 7

Finish the sentence for a statement about the Curve of Spee:

The longer the radius, ___________

Answer 7

The flatter the curve of spee

Question 8

Define Immediate Sideshift:

Answer 8

When the initial mandibular lateral translation movement occurs before the condyle translates from the fossa

Question 9

The greater the immediate sideshift, what must happen to the posterior cusps and the opposing fossae and grooves

Answer 9

The greater the immediate sideshift, the shorter the posterior cusps must be and the wider are opposing fossae and grooves

Question 10

The greater the distance of the tooth from the axis of rotation (working condyle) what must happen to the angle formed by the angle formed by the laterotrusive and mediotrusive pathways

Answer 10

The wider the angle formed

Question 11

Horizontal determinants of occlusal morphology: The distance from rotating condyle –> Greater the distance –> What effect?

Answer 11

Wider the angle between laterotrusive and mediotrusive pathways

Question 12

Advantages and Disadvantages of the Semiadjustable articulator

Answer 12

1. Provides a significant advantage over the non-adjustable articulator in replicating the patient’s specific condylar movement
2. Excellent for routine dental treatment
3. More time consuming as in order to be effective, information must be transferred from the patient to the articulator
4. More expensive instrument than the nonadjustable articulator