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Occlusion Flashcards

1
Q

how will monoplane occlusion result in group function?

respect to canines?

A

if the canines are far enough apart

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2
Q

what causes the unilateral posterior group function in monoplane? (ex- right lateral)

A

inclination of the condyles - cusp flat but curved condyle so it matches the curve of condyle and opens

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3
Q

what is required to not have anteiror contact in protrusion with denture?

A

increased Horizontal overlap
decreased vertical overlap

in wax you

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4
Q

what controls the excursions by the condyle?

A

+/- curve of wilson or spee - which controls the excursion of the condyles

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5
Q

rules for balanced occlusion

A

Bilateral posterior contact in CO
Bilateral posterior contact in Lateral
Bilateral posterior contact in protrusion

NO anterior contact in CO or lateral

optional contact in protrusion IF CONTACT IN ANTERIOR IS SIMULTANEOUS WITH POSTERIOR CONTACT

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6
Q

balanced occlusion REQUIRES?

A
  1. absence of anterior contact in CO
  2. Absence of incisal guidance in protrusion
  3. Absence of canine guidance in lateral
  4. PRESENCE OF COMPENSATING CURVES
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7
Q

compensating curves compensate for what?

A

the articular eminence

with the curves we can have posteiro contact for longer - as opposed to monoplane when we open up sooner

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8
Q

compensating curve

A

curve of the occlusal plane that compensates for the curve of the articualr eminence

they maintain posterior contact for longer than flat planes

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9
Q

monoplane anterior rules

A
  1. NO VERTICAL OVERLAP
  2. minimum of 1mm horizontal overlap
  3. tilt as indicated
  4. NO BALANCE - freedom of movement
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10
Q

anatomical anterior tooth arrangment rules

A
  1. 1 MM VERTICAL OVERLAP
  2. 1-2mm HORIZONTAL overlap
  3. tilt as indicated
  4. potential for balance
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11
Q

retromolar pad height if useing anatomical?

A

1/2

starts at 1/2 and ends at 2/3–due to the curve of spee

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12
Q

retromolar pad height if using curved posterior?

A

1/2

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13
Q

posterior crest of ridge on mandible relation to teeth placemtn?

A

the lowers central fossas are CENTERED to the posterior crest of ridge line

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14
Q

how are upper posteriors set in monoplane?

A

SLIGHTLY BUCCAL to the lowers – to porevent cheek biting

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15
Q

what is contacting in the posterior in a lingualized set -up on a curve?

A

maxillary posterior teeth are set with the lingual cusps in contact with the mandibular central fossae and the maxillary buccal cusps slightly out of contact

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16
Q

resoprtion of the ridges in general (no prosthesis placed yet)

A

the maxillary resorbs up and back

the mandible resorbs down and forward

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17
Q

how would natural occlusoin design in a complete denture affect bone loss? incisal guidance? canine guidance?

A

incisal guidance – both dentures to move. – increased anterior resorption with the anterior ridge acting as the fulcrum

with canine guidance – the dentures will also move and the single anterior point will act as the fulcrum causing resorption

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18
Q

fixed occlusal facotrs

A

Centric Relation
H condylar inclination
V condylar inclination

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19
Q

Alterable occlusal factors

A
  1. H overlap of anterior teeth
  2. V overlap of Ant teeth
  3. Cusp height of posterior teeth
  4. Curve of plane
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20
Q

curve a-p is called?

curve lateral called?

A

spee

wilson

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21
Q

3 occlusal schems

A
  1. ANATOMICAL - curved plane + cusped teeth
  2. MONOPLANE OR LINGUALIZED
    a. flat teeth curved plane
    b. flat teeth with flat plane
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22
Q

define monoplane occluson

A

an occlusal arrangement wherein the posterior teeth have masticatory surfaces that lack any cuspal height

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23
Q

define lingualized occlusion

A

described by howard payne in 1941- this form of denture occlusion articulates the MAXILLARY LINGUAL CUSPS WITH THE MANDIBULAR OCCLUSAL SURFACES IN CR AND EXCURSIONS so that the cutting edge is on the maxilla and the food table is on the mandible.

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24
Q

define anatomical occlusion

A

an occlusal arrangement for dental prostheses wherein the posterior artificial teeth have masticatory surfaces that closely resemeble those of the natural healthy dentition and articulate with similar natural or artificial surfaces

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25
how to increase horizontal overlap in wax | do's and don'ts
translate the mandibular horizontally (push back) -- do not tip or retrocline
26
how to decreasr vertical during protrusive movements to limit anterior guidance? when in wax? when in denture?
denture = ware facets wax = move down central anterior on the bottom vertically
27
How does monoplane set up meet the 4 major rules of denture occlusion?
1. Area A is controlled clinically 2. Area B is controlled in the lab -- denture rules 1, 2,and 3 (no anterior contact in CO no incisal guidance and no canine) 3. Max contact of posteriors in CR 4. +/- curves (spee, wilson) to allow for control of excursions by condyles
28
advantages of monoplane occlusion
1. easiest to set up 2. potential to place least harmful forces on ridges 3. best for poor quality of ridges 4. can be used for class I II and III
29
disadvantages for monoplane occlusion
1. chewing efficiency- conflicting 2. pt. must be coached to chew on both sides - simultaneous 3. easthetics are compromised
30
lingualized occlusion - general
flat lowers with a upper functional lingual cusp
31
what becomes 'better' when go from complete monoplane to a lingualized set up
chewing efficiency is improved esthetic compromises improved because of the buccal cusps on maxillary teeth + chewing may get better because of that as well
32
what does balanced occlusion REQUIRE
1. absence of anterior contact in CO 2. Absence of incisal guidance in protrusion 3. absence of canine guidance in lateral 4. ** PRESENCE of compensating curves -- curves allow for balance
33
what does monoplane teeth with curves allow us to do? what does it componsate for?
1. allows us to compensate for anterior eshetic issues of monoplane set ups (before we did not have the ability to have anterior overlap) 2. so it allows for anterior (vertical overlap) 3. introduces the curves of spee and wilson so we are able to produce BALANCED OCCLUSION -- curves give us balance
34
do you have to have cusps for balanced occlusion?
no- just need to have curves
35
Major rules/ points in balanced occlusion
1. bilateral POSTERIOR CONTACT IN - CO - Lateral - Protrusion
36
anterior contact in CO or lateral in balanced occlusion?
NO
37
when is it optional to have anterior contact in denture occlusion?
IN PROTRUSION - anteriors MAY touch wit bilateral posterior in contact - anteriors MAY NOT TOUCH WITHOUT POSTERIORS IN CONTACT
38
Definition of compensating curve
curve in the OCCLUSAL plane that compensates for the curve of the anterior eminence curved planes maintain the POSTERIOR CONTACT FOR LONGER THAN FLAT PLANES
39
does balancing side open up in balanced occlusion?
NO
40
advantages of monoplane denture with curves basic disadvantages?
1. allows for more esthetic vertical and horizontal placement of mandibular anteriors -- can get overlap 2. may allow LIMITED ability to incise food 3. may give better support and less movement during posteior occlusion due to balance 4. when done properly, supports joint movement and may lessen stress on the TMJ disadvantages : - deep overbites still a problem - difficult adjsutments -- have to do a clinical remount - if not done right - can increase denture movement and bone loss + wear of TMJ
41
what is the type of denture occlusoin recommended for a two implant retained mandibular overdenture?
lingualized (anatomical maxillary 20 degree molars) against monoplane mandibular teeth with curves
42
in lingualized occlusion what is the relationship of the crest of ridge on mandible
buccal cusps are STILL CENTERED -- we are not moving teeth in - more refers to the maxillary lingual cusps
43
relationship of the crest of ridge on mandible in anatomical tooth set up?
the mandibular are set lingual so the buccal cusps are set centered over the crest of ridge (vs previously the fossa was over the crest of ridge)
44
posterior teeth in anatomical shift where?
lingually
45
objectives in balanced denture occlusion? | options to achieve?
1. prevent anterior contact as long as possible 2. maintain posterior contact as long as possible ``` options: Increase horizontal decrease vertical increase cusps increase curves ```
46
differences in overlap both vertical and horizontal in monoplane and anatomical
MONOPLANE : 1. NO VERTICAL overlap 2. minimum of 1mm horizontal overlap + no balance ANATOMICAL 1. 1mm vertical overlap 2. 1-2 mm of horizontal overlap +potential for balance
47
where do you start and end the occlusal plane when setting up for anatomical? for monoplane
ANATOMICAL: START :1/2 -- because set curve up to 2/3 and cannot be higher than this-- end higher due to the curve of spee Monoplane -- start and end at 2/3
48
how do we arrange the posteriors in anatomical - 3 general guidelines
1. with crest of ridge 2. retormolar pad 3. overlap
49
Most common lingualized occlusal options in terms of degrees of teeth
Max = 10 or 20 MAnd = 0 or 10
50
how do you set up monoplane posterior? describe order
A-B-C(lower posterior), D the lower central fossa are centered over the ridge and we are setting ONE SIDE/TOOTH AT A TIME- to maintain VDO and occlusal plane -- the ENTIRE surface of the monoplane tooth must touch the plane
51
when do you stop setting teeth in the posterior?
end before the ascending ramus --- only as many that can fit on the occlusal plane
52
orientation of the upper posterior in relation to the lower posterior in monplane? what does this prevent?
slightly buccal to the lowers prevents cheek biting
53
what is holding VDO while you are setting a quadrant of posterior teeth?
PIN -- never take pin off articulator
54
what are the implications of edge to edge in the posterior?
cheek biting will occur
55
'reveal' in monoplane lingualized in posterir?
1-2 mm horizontal overjet of the posterior teeth upper is about 2-3 mm B to lower
56
describe relationship between the max and mandibular posteiror first molars in lingualized occlusion
the maxillary lingual cusp will occlude in the central fossa of the mandibular cusp - which is centered over the ridge the maxillary buccal cusps will be slightly out of contact
57
for monoplane or lingualized where is the mandibular relationship to crest of ridge?
it is centered
58
3 curves in anatomical set up
1. spee - anterior / posterior 2. wilson - buccal.lingual 3. facially - 5 degree - arch as it wraps -- it aligns the heights of contour
59
anatomical posterior upper central fossa is centered where?
over the lower crest of ridge line -- matching up the buccal cusps of lower into upper central fossa the buccal cusp of maxillary will line up with the line we made 3mm buccal to the lower crest of ridge
60
what does placing the anatomical set up lingual to the crest of ridge compensate for?
compensate for the increased lateral forces that occur during excursions
61
facial curve of the maxillary posteriors?
aligns the height of contour of the teeth
62
curve of wilson in terms of the curve of spee
lingual curve od spee MINUS the buccal curve of spee
63
placement of maxillary first molar in relation to the occlusal plane
only the mesiolingual cusp will touch the plan we tweek this tooth UPWARDS * not completely perpendicular to the occlusal plan like the bicuspids -- long axis is tilted on molar
64
key tooth in lower arch anatomical?
lower first molar -- then after we set this check excursion *percise intercuspation in centric will facilitate intercuspation in eccentric
65
is the lingualized monoplane we set up an inter-cuspating occlusion?
NO -- it is a non-intercuspating occlusoin using 0 degrees lower and 20 degrees upper
66
can a denture have an esthetic vertical overlap?
yes - as long as it has compensating curves or cusped teeth and/or curved planes are used
67
how to decide whether to use flat or cusp teeth? what is the check list?
1ST= CONDITION OF THE RIDGE ``` 2ND=A,B, C checklist A= angles class B- Bruxism C= coordination (reproducibility) -- more freedom in eccentric movements ```
68
what will decrease the chance of increases in pressure with denture occlusion?
having NO anterior contact in CO
69
how to slow the rate of bone loss?
1. prevent anterior occlusion by A. increasing horiztonal and B. decreasing vertical 2. by maintianing posterior occlusion by A. increasing cusp and B. increasing curve

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