Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
77 Cards in this Set
- Front
- Back
|
5 Principles of Occlusoin for Complete Dentures
|
1. Complete initial occlusal contact in CR (CO). 2. All ant. and post. denture teeth inclines and surfaces must funciton as a unit during excursives; 3. No prematurities in occlusion; 4. No disclusion of posterior denture teeth during protrusion (**** Christiansen's!); 5. 5. NO ANTERIOR TOOTH CONTACT IN CO
|
|
|
What occludes where in lingualized occl?
|
maxillary lingual cusp tips occlude with the flatter, opposing mandibular teeth fossae
|
|
|
4. What is a significant CONTRAINDICATION for selecting balanced occlusion for a patient?
|
pt unable to establish repeatable CR position
|
|
|
ch/ca is
|
cusp height; posterior tooth cusp angulation in relation to overall occlusal surface
|
|
|
9. What two factors control the angulation of the functional inclines of the posterior teeth, and which has the most influence on most of the teeth?
|
CG, IG; IG
|
|
|
another term for monoplane occl
|
neutrocentric occlusion
|
|
|
balanced vs monoplane
|
BO has bilat/simultaenous contact of ant and post. teeth in eccentric posiitons
|
|
|
3 chars of BO
|
1. bilateral, simultaneous contact of postrior teeth in CR; 2. The anterior teeth do not contact in CR; 3. BILATERAL SIMULTANEOUS CONTACT OF ANT. AND POST. TEETH IN ECCENTRIC POSITIONS
|
|
|
2 chars of monoplane
|
1. bilateral, simultaneous contact of postrior teeth in CR; 2. The anterior teeth do not contact in CR;
|
|
|
BO
|
bilateral, simultaneous contact of posterior teeth in centric relation and in eccentric positions. we dont want anterior teeth contact in CR
|
|
|
The following are indications for BO or Monoplane? younger pt, better neuromuscular control, good ridge relationship, good anatomy of ridges; due to phoenetics/esth. you might need some vertical overlap
|
BO
|
|
|
The following are indications for BO or Monoplane? little old ladies with bad neuromuscl. control. moderate to severe ridge resorption; class 2 or class 3 ridge relationships
|
monoplane occlusion
|
|
|
variety of posterior teeth forms
|
cusp, flat, minimal inserts, lots of diff ones
|
|
|
anatomic tooth forms
|
anatomical steepness to central fossa; increased cusp height, looks more like a natural tooth. 12-20 degrees of cusp '
|
|
|
nonanatomic tooth forms
|
flat cusps, used for pt witih little ridge height, poor neuromusclular form; occl table is relatively flat
|
|
|
combo tooth forms - anatomical and semianatomical
|
lingualized occlsuion on right of combo tooth forms slide 8
|
|
|
what mean bilateral balance
|
find simultaneous contact no matter where you move the teeth.
|
|
|
cross tooth balance
|
in a working movement, both cusps make contact w/ oppsing cusps
|
|
|
What type of denture teeth are used with bilateral balanced denture occlusion?
|
anatomic or semianatomic
|
|
|
TF Anterior and posterior teeth contact in eccentric positions in bilateral balanced denture occlusion
|
TRUE
|
|
|
Where are forces directed in nonbalanced, monoplane occlusion?
|
centralized forces directed to ridges
|
|
|
How are teeth shape altered by nonbalanced, monoplane occlusion
|
decreased BL width of teeth
|
|
|
TF There are a reduced number of teeth required in nonbalanced, monoplane occlusion
|
TRUE
|
|
|
In lingualized occlusion, what type of denture teeth can be used in the MAXILLARY arch?
|
anatomic or semianatomic
|
|
|
In lingualized occlusion, what type of denture teeth can be used in the MANDIBULAR arch?
|
nonanatomic or semianatomic
|
|
|
TF lingualized occlusion is always monoplane.
|
false - either balanced or monoplane; preferred is nonbalanced lingualized (semianatomic max with monoplane mand)
|
|
|
Why are the mandibular teeth in lingualized occl flatter?
|
less lateral forces; less displacement during chewing
|
|
|
How do we ensure no buccal contacts in lingualized occlusion during eccentric movements?
|
slant buccal cusp up at least 1 mm
|
|
|
TF In balanced lingualized occlusion, we want to see NO working/nonworking contacts in eccentric moevemtns.
|
FALSE - balanced ling occl wants tooth to tooth contact on all working contacts (or at least the tripod effect)
|
|
|
Which occlusal scheme do we prefer and why?
|
lingualized occl is best of both worlds! penetration, simpler technique, balanced and nonbal ling both get better denture stability
|
|
|
SHIFT OVER TO NEXT PDF HERE
|
fixed and var factors for balanced occl
|
|
|
Name the three fixed factors for balanced occlusion.
|
condylar guidance, centric relation, and axis-orbital plane [CG, CR, AOP: Come Ralph, Come Get, An Orange Popsicle]
|
|
|
Name the 4 VAR FACTORS for balanced occlusion
|
incisal guidance, plane of occl, cusp height, compensating curve [IG, CC, CH, OP]
|
|
|
Which fixed factor relates to mandibular guidance by condyles traversing through the glenoid fossa (.rotational to translational movement)
|
condylar guidance
|
|
|
What are three factors of condylar guidance
|
condylar guide inclination, laterotrusion, Bennett angle
|
|
|
How can we find condylar guide inclination
|
take protrusive recrods to find this
|
|
|
laterotrusion is ...
|
working side condylar movement; bennet movement
|
|
|
What is the bennet angle?
|
angle formed by sagittal plane and path of the advancing condyle during lateral mandibular movements as viewed in the horizontal plane....This is the progessive side shift on articulator
|
|
|
TF In CR, the condyle is in the thickest avascular portion of the disk
|
FALSE - THINNEST avascular portion of disc
|
|
|
Around which axis does CR allow rotary movement?
|
transverse horizontal axis
|
|
|
Describe the disc-condyle complex locaiton in CR
|
antero-superior slope of AE
|
|
|
HANAU'S QUANT FACTORS (5)
|
CG, IG / CHOP.CC
|
|
|
Which of hanau's factors can you alter? (variable)
|
CH, OP, CC, IG
|
|
|
Which of hanau's factors can you NOT alter? (fixed)
|
CG (condylar guidance)
|
|
|
What are the three fixed factors of balanced occlusion? (DIFF FROM HANAU'S FIXED!!)
|
CG, CR, Axis-Orbital Plane
|
|
|
Which parts of articulator relate to the incisal guidance (contacting surfaces of max. and mand teeth)?
|
contacting surfaces of the incisal guide pin and incisal guide table
|
|
|
TF The plane of occlusion is generally flat.
|
FALSE - NOT flat, but a planar mean
|
|
|
Define: the average plane established by the incisal and occlusal surfaces of teeth
|
plane of occlusion (OP)
|
|
|
Define: perpendicular distance b/w tip of a cusp and its base plane
|
cusp height (CH)
|
|
|
What is the compensating curve? How do we establish it when setting dentures?
|
the edentuolous equivalent to curve of wilson and spee. use the compensating template given (metal thing)
|
|
|
Which part of the articulator relates to the axis-orbital plane?
|
upper member of articulator
|
|
|
Who came up with the equation involving hanau's factors?
|
Theielemann
|
|
|
THIELEMANN made an equation using hanau's factors -
|
cg*ig/ (chopcc)
|
|
|
CC is
|
compensating curve
|
|
|
IG is
|
incisal guidance
|
|
|
CI/CG
|
condylar inclination/condylar guidance
|
|
|
What is the OVERRIDING FACTOR in determining which occlusal design to use?
|
Vertical overlap of anteiror teeth! There should be NO OVERLAP IN MONOPLANE
|
|
|
Why do we want to avoid vertical overlap in monoplane occlusion?
|
so when pt moves out of CR to protrusive, there are no anterior teeth that collide, so you wont knock dentures loose.
|
|
|
So why would you pick BO over monoplaners?
|
due to phoenetics and esthetics who require vertical overlap
|
|
|
Explain why we have 2 schools of thought for denture design
|
Balanced Occl Always Club VS Monoplaners. Monoplaners say since we chew on a bolus of food, so who cares about balance if our teeth arent in contact during function? Balanced Occl Club says they want to distribrute forces evenly when we swallow, since teeth touch. MONOPLANERS answer this claim by ignoring these forces and using nonbalanced lingualized occlusion (at least 1 monoplane arch to prevent lateral forces transmitted to bone, since lateral forces damage bone but compressive forces do not).
|
|
|
TF VERTICAL OVERLAP IS THE DRIVING FACTOR to determine scheme.
|
TRUE - unless there is a reason to have vertical overlap, then we'll use nonbalanced occl because its least problematic. trying to maintain balanced occl is very tough.
|
|
|
TF there is no anterior contact in CR in balanced lingualized occlusion.
|
true
|
|
|
OT TF A better esthetic/stable dentures can be made with balanced occl over monoplane
|
TRUE
|
|
|
OT TF Nonanatomic teeth are set with horizontal overlap to decrease cheek-biting
|
TRUE
|
|
|
OT TF Nonanatomic teeth increase chewing efficiency
|
FALSE
|
|
|
OT TF Nonanatomic teeth are arranged on a flat, linear plane directing forces vertically
|
TRUE
|
|
|
OT TF Nonanatomic teeth permit ideal balanced occlusion in all excursions
|
FALSE
|
|
|
OT TF The incisal 1/3 of max. incisors contribute more to esthetics than to anterior lip support
|
TRUE
|
|
|
OT TF the curve of spee appears in both dentate and edentulous pt
|
false - just dentate
|
|
|
1. What is the difference between centric relation and centric occlusion?
|
CO is the occlusion of dentures when pt is in CR.
|
|
|
2. What are the two major posterior occlusal schemes for complete denture patients?
|
balanced and nonbalanced
|
|
|
3. What are the primary- indications for a balanced occlusion?
|
1. If you need to establish significant vertical overlap for anterior teeth for esthetics; 2. If semianatomic or anatomic opposing posteior denture teeth are requried because of esthetics, mastication, old dentures with semi/anat. teeth, or need for vertical overlap of anteiror teeth
|
|
|
5. Both a steep vertical overlap of the anterior teeth and no vertical overlap result in some degree of separation of the posterior teeth when the patient makes a protrusive movement. Knowing that anterior disclusion of the posterior teeth is contraindicated in most patients, why is it often acceptable in a nonbalanced occlusion?
|
Steep vertical of anterior teeth results in unacceptable functional forces being directed to anterior hard and soft tissues. No vertical overlap of teeth usually results in contact of both anterior and several posterior teeth. This distribution of contacts with no vertical overlap of anterior teeth spreads the occlusal forces over an acceptably large area of the ridges and minimizes trauma to underlying tissues
|
|
|
6. Why is an anterior disclusion of the posterior teeth a preferred occlusion of the natural teeth, but is contraindicated in complete dentures?
|
Natural teeth are anchored in bone and can handle strong excursive forces. Edentulous pt have dentures fitted to residual ridges, so any forces limited to the anterior teeth are immediately directed onto anterior ridges. This direct force over a small area can cause soft tissue abuse and bone loss.
|
|
|
7. Why should lingualized occlusion be considered for patients?
|
technically simplified; both balanced and nonbalanced
|
|
|
8. What are the five factors of protrusive occlusion? Draw a formula that indicates their relationship.
|
CG, IG, CH, OP, CC
|
|
|
10. What are effective cusp angles?
|
Resultant cusp angles of denture teeth, once the long axis of the teeth are no longer perpendicular to the benchtop OR once the cusp angle has been altered through occlusal adjustments
|
