quick occlusion questions

[Stephie3]

when working with articulators:

1. with greater condylar inclination- can the cusps be tall or must they be shorter?

2.would a greater bennett angle require that the grooves be placed more mesially or more distally?

3.what affect does the intercondylar distance have on ridge and groove pattern?

4. with greater bennett movement, must be cusps be shorter or can the cusps be tall?

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[jay47]

when working with articulators:

1. with greater condylar inclination- can the cusps be tall or must they be shorter?

2.would a greater bennett angle require that the grooves be placed more mesially or more distally?

3.what affect does the intercondylar distance have on ridge and groove pattern?

4. with greater bennett movement, must be cusps be shorter or can the cusps be tall?

1. With greater condylar inclination, you may make the cusps taller because the condyles separate more quickly in protrusive movement (faster detrusion). The same holds true in the human body- the greater the slope of the articular eminence, the faster the condyles move downward and medially, creating greater vertical dimensions for the cusps.

2.With a greater Bennett angle, the medial walls that the articulator follows will be angled more medially. Therefore, the nonworking side will have immediate side shift earlier and therefore the grooves should be more distally. This is because the orbiting pathway a cusp on the nonworking side will have a shorter radius.

3. The greater the intercondylar distance, the greater the radius of curvature of cusps on the nonworking side. Working grooves and nonworking grooves are more mesial. The mandibular teeth should have more distally placed ridges and maxillary teeth should have more mesially places ridges.

4. Not so sure about this one, but...I assume that the more Bennett angle, the greater the immediate side shift and therefore the less time for vertical detrusion. Therefore, with less time to vertically detrude, the cusps must be shorter...

 

[jay47]

Are you sure you are still pre-dental? This sure seems like dental student occlusion to me....or perhaps pre-dental student prosthodontic research...

 

[mike3kgt]

when working with articulators:

1. with greater condylar inclination- can the cusps be tall or must they be shorter?

2.would a greater bennett angle require that the grooves be placed more mesially or more distally?

3.what affect does the intercondylar distance have on ridge and groove pattern?

4. with greater bennett movement, must be cusps be shorter or can the cusps be tall?

Angle of articular eminence is the most important measurement on the articulator (some say immediate side shift is equally as important).

1. "The steeper the angle of eminence, the steeper cusps maybe"
"The flatter the angle of eminence, the flatter the cusps must be"

2. Mesially.

3. Greater the intercondylar distance, smaller the angle between pathways (latero vs. medio trusive pathways)

4. Greater the side shift (bennett movement), the shorter the cusps.