Lec 12 - Occlusal Morphology Determinants Flashcards
mutual protected occlusion does NOT have
working side teeth contacting
horizontal stuff from quiz
grooves and ridges
vertical stuff from quiz
cusp height
most people choose to chew on blank side
one
pattern of chewing stroke
tear drop
masticatory cycle
open, mandible toward side we are chewing on, back to MIC
three neuromuscular determinants of occlusion
bruxism, mastication, bite force
average person bites this hard
150-250 lbs
edentulous person bites this hard
5-8 lbs
max edentulous force like with denture
50 lbs
bruxism will cause a blank because mandibular buccal cusps will be worn down and shorter than the lingual cusps
reverse curve of wilson
anterior controlling factor of occlusion
anterior guidance
posterior controlling factor of occlusion
condylar guidance (angle of eminence)
vertical determinants of occlusal morphology
cusp height and fossa depth
steeper angle of the eminence, the blank the posterior cusps
taller/steeper
flatter angle of eminence, the blank the posterior cusps
shorter
greater the horizontal overlap, blank anterior guidance, blank posterior cusps
decreased, shorter
greater vertical overlap, blank anterior guidance, blank posterior cusps
increased, taller
longer the radius of a-p curve of spee, the blank the posterior cusps
longer (doesnt make sense)
shorter the radius of a-p curve of spee, the blank of the posterior cusps
shorter (doesnt make sense)
more superior movement of the rotating condyle in bennett movement side shift…. blank posterior cusps
shorter
greater movement of the rotating condyle in bennett movement side shift…. blank posterior cusps
shorter
more immediate movement of the rotating condyle in bennett movement side shift…. blank posterior cusps
shorter
more progressive movement of the rotating condyle in bennett movement side shift…. blank posterior cusps
shorter
horizontal determinants of occlusion
grooves and ridges
greater the distance of the tooth from the rotating condyle, the blank the angle formed by laterotrusive (working side) and mediotrusive (non working side) pathways generated by supporting cusp tips
wider
as the tooth is positioned further from the midsagittal plane, the angles formed by laterotrusive and mediotrusive pathways generated by the supporting cusps will blank
increase
As the amount of the lateral translation movement increases, the angle between the mediotrusive and laterotrusive pathways generated by the supporting cusps tips blank
increases
The greater the intercondylar distances, the blank the angle formed by mediotrusive and laterotrusive pathways generated by the supporting cusp tips.
smaller