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24 Cards in this Set
- Front
- Back
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Levers:
Class I Class II Class III |
- see-saw
- wheelbarrow - tweezers |
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Lever effects:
protrusive interference CR/CO Int. NWS Int |
- destructive C1 lever. (condyle is displaced as fulcrum. Excess pressure on ant's
- C3 & C1. Ups ant stress, reseats condyle -C2. Can displace condyle which results in C1 |
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symptoms of C1 lever destruction (5)
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-muscle spasms
-tooth symptoms -mobility -BL bone loss (esp on NWS premature teeth) -maybe TMD & O disfunction |
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Purpose of interocclusal Pt records (3)
not needed if |
-to relate casts
-vertical support -horizontal stability -stable tripod remains after tooth is prepped |
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Record Base:
as related to VDO |
-record base is taken before teeth occlude (open VDO) so that there is no tooth deflection away from CR
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Set _____ wall on __WS/NWS__ of articulator for Bennett movement
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-medial wall
-NWS |
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O adjustmaent contraindications (8)
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-no definable end
-more harm than good -interferences w/out symptoms -few remaining teeth -ant open bite/excessive overlap -large lateral CR/MI slide -heavy wear facets/flat teeth -excessively mobile teeth |
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MUDL:
def causes adjustments |
-Mesial Upper, Distal Lower
-causes ant & vert slide -remove CR/MI ant & vert slide |
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LUBL:
def causes adjustments |
-Lingual Upper, Buccal Lower
-lat & vert slide -according to Rx (?) |
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BULL:
def causes adjustments |
-Buccal Upper, Lingual Lower
-lat, vert slide -remove NWS sinterferences, lat, vert slide |
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DUML:
identifies def adjustments |
-Distal Upper, Medial Lower
-potential protrusive incline -remove protrusive interferences, NWS interferences, equalization of ant's, elimination of posts |
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what is different about post implant contact in CR/MI
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-should contact very lightly, since no PDL
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Freedom in Centric (FIC) (2)
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-represents flat area btw terminal hinge closure in CR & pt's old MI
-large FIC is bad b/c working inclines are not available for immediate disclusion |
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O Marking media:
thick papers extra thin plastics |
- 100-250 microns. Poor flex, poor for mobile teeth, moisture. False marks
- 40-80 microns. Poor flex, fair in moisture - 21microns (accufilm II). Good flex, least artifacts |
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O Marking media:
liquids waxes |
-3 microns. for highly polished gold, ceramic
-detects area of premature O contact, O reduction. Poor for mobile teeth, excellent in moisture |
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O Marking media:
sprays foils micro abrasion |
- contact btw clips & implant bar, O contacts, internal fit, prox contacts
- 8-12 microns (thinnest non-liquid). final check of O contact intensity (lots of pressure needed) -50 micron aluminum oxide. Dull finish on polished gold. Will mark O and IP contacts, then can be polished away |
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Posselt's envelope
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-border movements (most extreme positions) of mand
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envelope of function
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-determines anterior guidance
(separate from condylar guidance) |
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envelope of movement
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-functional movements of mandible occur w/in it
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neutral zone (3)
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-major determinant of how ant teeth erupt into mouth
-programs envelope of function |
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lateral envelope of function (3)
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-establish TMJ stability
-create harmonious ant guidance -establish stable holding contacts of equal intensity on all post teeth |
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Ant guidance, smile design:
(steps) |
-should have labio-incisal line angle (not rounded)
-L of Max I need stops for mand I edges. Prevents supereruption - cervical portion of labial contour -> incisal portion -> contour & position incisal edge -> contour incisal plane -> lingual contour/ AG |
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Incisal edge position:
1st determine why |
-inclination of Max ant and labial contours
-b/c vert position of inc edges is dependent on horizontal position |
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If post teeth separate ant teeth in protrusive, a __________ should be made and _______________
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-protrusive bite record
-condylar guidance should be set on articulator |
