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36 Cards in this Set

  • Front
  • Back

how can natural and artificial teeth differ?

proprioceptiondisplaceabilitypositionwearability/efficiencyarea of support
what is natural tooth proprioception like?
PDL that has propioceptive receptors that provide neuromuscular system control to avoid prematurities during function
what is artificial tooth proprioception like?
proprio receptors lost so not NM system to avoid prematurities during function
how much do natural teeth displace due to occlusal pressures
vert: 0.03 mmhor: 0.03 mm
how much to art teeth displace?
they are set in a base with no indep movementvert: 0.4 mm (10x more)hor: as much as several mm
max resorption directions
up and in
mand resorption directions
down and out
where do you set anteriors due to resorption of ridges over time
where the natural teeth would be (support of lips and facial esthetics)
where do you set posteriors due to resorption of ridges over time
lingually
do natural teeth show wear under normal conditions?
no (only in nonphysiologic occlusion)
are natural or art teeth more efficient for chewing?
natural
what can wear art teeth
abrasive food diet
the periodontal area of a tooth is approximately __ the area of the mucous membrane of the cervical area of the tooth
4x
mutually protected occlusal scheme is...
canine/anterior guided
group function occlusal scheme is...
immediate/progressive
2 types of occlusal schemes for natural teeth
mutually protectedgroup function
2 types of organized occlusal schemes for artificial teeth
balancednon-balanced
what is balanced occlusion
flat set to a curvecross arch set to a curvecross arch/cross tooth set to a curve
what is non-balanced occlusion
neutrocentric
what determines occlusal scheme for setting art teeth
relationship of ridges (BL and AP)vert/hor overlap of anteriorsexisting ridge supportesthetic requirement for post teethorientation of occlusal planeability to find pts CR
mounting casts for natural teeth
CR if indicatedMI if indicated (habitual bite)
mounting casts for art teeth
always use CR for c/c or c/rpd
VDO in nat vs art teeth
usually established in naturalneeds to be established in artificial
tooth contacts in nat vs art teeth
ideally cusp/fossa in naturalcould be cusp/fossa or flat in artificial
balancing contacts in nat vs art
not ideal in nat but could be adapted toused to stabilize dentures during function in art
how do non vertical (aka horizontal) forces affect nat vs art teeth?
adapted to and asymptomatic in natnot adapted to, symptomatic in art
overlapping of incisors in nat vs art
mutually protected counts on ant contact to clear posteriors in excursivescontact of anteriors in excursives will cause destabilizing forces and cause destablizing forces of the c/
which arch of c/c will incisor contact in excursives affect with destabilizing forces
upper
envelope of function for nat vs art
nat: teardrop, unilateral chewing art: up and down; bilateral chewing
force of closure for pr with natural teeth
5-175 lbs
force of closure in pt with art teeth
22-24 lbs
common signs of malocclusion in nat teeth
wear, widened PDL, mobility, soreness in muscles of mastication/TMJs, advancement of existing perio disease in natural dentition
common signs of malocclusion in art teeth
immediate responseulceration, inflammation, proliferation of mucosa, loss of bone
mc cause of surface roughness on a cast
adherence of alginate to enamel
possible reasons for cast roughness
adherence to enalemsalvia or other fluids on impresison surfacecompressed air useinsufficient spatulation of alginate or stonepremature removalcontaminated stonesingle pour technique
how long after to remove alginate impresion from stone
45-60 min otherwise you get etching (soft/chalky)