Lecture 5-Support & Occlusion Flashcards by Austin Shackelford

WHAT is the RESISTANCE to forces at a RIGHT ANGLE to the occlusial surface of a denture (tissue ward movement of the denture)?

SUPPORT

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The quality of _______ depends on the THICKNESS of the soft tissue that covers the bone

SUPPORT

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What are the two SUPPORT areas of the maxillary arch? What is the PRIMARY support area?

1.Crest of the ridge 2.HARD PALATE (PRIMARY support area)

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What are the 3 SUPPORT areas in the mandibular arch? What are the two PRIMARY?

1.Buccal Shelf (PRIMARY) 2.Retromolar pads (PRIMARY) 3.Slopes of the ridge (not primary :)

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Maximum SUPPORT is achieved by maximum WHAT?

TISSUE COVERAGE (hence a proper final impression)

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What is the resistance to HORIZONTAL displacement by functional forces?

STABILITY

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What are the 4 factors affecting stability?

1.Anatomy of the residual ridge 2.Flanges of the Denture 3.Posterior Teeth 4.Occlusion

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When looking at ideal anatomy to aid in STABILITY, we are looking for _____ ridges width and height (mand and max) and ______ ridges on the mand and max.

equal….parallel

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Higher and more ________ the FLANGES are to the occlusal surfaces the more STABLE is the denture to HORIZONTAL forces

perpendicular

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For ideal stability the posterior teeth should be on the ______ (______) of the residual ridges.

crest (center)

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What is the best type of occlusion for ideal STABILITY (horizontal forces)?

BALANCED occlusion

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What is the resistance of the denture to DISLODGMENT?

RETENTION

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Factors affecting Denture RETENTION: ________- the molecular attraction between UNLIKE molecules

ADhesion

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Factors affecting Denture RETENTION: _______-the molecular attraction between LIKE molecules

COhesion

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Factors affecting Denture RETENTION: The GREATER the area of contact between the denture base and the mucosa and the _______ the salivary film, the GREATER the Magnitude of the retentive forces as a result Of ______ and ______

Thinner….Adhesion and Cohesion

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Factors affecting Denture RETENTION: Atmospheric pressure- Is the _______ pressure due to the weight of the atmosphere upon surfaces

hydrostatic…WTF?

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Factors affecting Denture RETENTION: What needs to be present to utilize ATMOSPHERIC pressure as a retentive force to keep border tissues in contact with the denture base

a PERIPHERAL SEAL

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Factors affecting Denture RETENTION: ________ is the SIMULTANEOUS contact of the Maxillary and the Mandibular posterior teeth during various jaw movements

BALANCED OCCLUSION

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Factors affecting Denture RETENTION: What prevents tipping or rotating or the denture base in relation to the supporting structures?

BALANCED OCCLUSION

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What do you need to complete a balanced occlusion when working with monoplane teeth?

balancing RAMPS

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How many points of contact do you need all lateral excursions to officially have bilateral balance?

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What are the two types of non-anatomic occlusion?

Monoplane (neutrocentric) and Balanced (balancing ramp_

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Why do we have monoplane occlusion?

to reduce the horizontal forces

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Typically when selecting Non-Anatomic denture teeth the ________ concept is used as a guide for setting the teeth

neutrocentric

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This concept of occlusion assumes that the anterior- posterior plane of occlusion should be parallel to the denture foundation area and not dictated by condylar inclination.

neutrocentric

In neutrocentric occlusion, the anterior-posterior plane of occlusion should be parallel to the _________

denture foundation area

IS neutrocentric occlusion dictated by condylar inclination?

NOOOOO (dictated by plane of occlusion parallel to foundation area)

In a neutrocentric concept the plane of occlusion is completely ______ and ______.

FLAT and LEVEL

Do we have Curve of Wilson or Curve of Spee incorporated into the setting of neutrocentric teeth?

Do we have vertical overlap in neutrocentric occlusion?

NO (edge to edge)

Does the patient incise a food bolus? What types of eating movements does the patient have to learn?

NO incise of bolus....pt must be a "chopper" and can no longer chew or grind

When setting neurtocentric teeth the horizontal and lateral condylar guidance should be set at _____.

ZERO

Neturocentric: In Class II patients the mandible tends to travel farther _______ in function and consequently more ________ overlap is necessary

anteriorly....horizontal overlap

Neutrocentric: Class III patients often demonstrate little or no ______ movement of the mandible during function. Consequently, little or no ______ overlap is developed in the set up.

anterior....horizontal

The mandibular occlusal table should end prior to the _________.

ascending ramus

The distal surface of most posterior maxillary denture tooth should extend __-__mm distal to the most posterior mandibular denture tooth.

1-2mm

WHAT feature MUST YOU HAVE to prevent biting of the cheek/corner of the mouth?

Horizontal overlap in the posterior!

The flatness of the maxillary ________ is provided by the flat buccal and lingual cusps, BOTH are going to contact the occlusal plane

PREMOLARS

What is Christiansen's phenomenon?

the STEEPER the condylar inclination, the GREATER the posterior discrepancy in EXCURSION

What does Christiansen's phenomenon mean for getting balanced occlusion with a monoplane set up?

we need BALANCING RAMPS! to fill the gap of the posterior discrepancy in excursion

Lateral or tipping forces tend to have an unfavorable effect on denture ______

STABILITY

Bilateral balance decreases the transmission of ______ tipping forces

LATERAL

_________ occlusion attempts to further decrease tipping forces by minimizing the effect of incline plane contact between the maxillary and mandibular denture.

monoplane

Bilateral balanced occlusion when using _____ degree cusped teeth is obtained by using balancing ramps.

zero

What are the two sources of inclined plane contact?

1.CUSPAL INCLINES of the maxillary and mandibular denture teeth 2.verticle overlap of the maxillary and mandibular ANTERIOR teeth

What are the two occlusal schemes we can achieve lingualized occlusion?

1.Bilateral Balanced 2.Maxillary anatomic opposing mandibular non-atomic

Lingualized occlusion: the dominant max lingual cusp and the simple mand fossa make a _______ and ______ type occlusal pattern.

mortar and pestle

Lingualized occlusion-there should be about a __mm space between the lingual inclines of the _____ cusps of the max teeth and the buccal cusps of the mandibular teeth.

1mm...buccal (essentially 1mm horizontal overlap)

In lingualized occlusion- There should be NO ______ cusp contacts of posterior teeth in centric or in lateral excursion.

buccal

What is the primary difference between lingualized occlusion with anatomical VS non-anatomical mandibular teeth?

non-anatomical mandibular teeth uses a NEUTROCENTRIC concept because we are not attempting to balance occlusion

WHAT ARE THE 5 FACTORS OF THE HANAU QUINT??

1. Condylar Incline/Guidance 2.Incisal Guidance 3.Curves (spee,wilson) 4.Cusp Angles/Heights 5.Plane of occlusion/orientation

It is a measurement of the path traveled by the condyles in the TMJ area during various mandibular movements.

Condylar guidance

Average inclination for complete denture patient is ____ degrees

30 degrees

How do you record a condylar inclination? What appointment?

Protrusive check-bite record...the TRY-in appt (4th)

_______: angle formed by drawing a line in the sagittal plane between the incisal edge of the maxillary and mandibular teeth when teeth are in CO and the horizontal plane...WHY do we CARE???

Incised Guidance Angle...helps set the anterior teeth so they don't contact during centric and eccentric movements

What is THEILMAN's formula???

C=Condylar Inclination x Incisal Guidance / OccPlane x Cuspal Inclination x Comp Curve

What does C equal in Thelmans formula?

C = balanced occlusion

Thielman's formula--WHEN all five factors are in balance, all teeth contact in ________ positions

excursive

Hanau's Quint: if the incised guidance is increased what happens to the posterior teeth?

they will disocclude

Its advised when using zero degree cusps to decrease the ________-

incised guidance (by decreasing Verticle overlap)

What is the ONLY factor in Thielman's formula the dentist cannot change?

Condylar Inclination

Of all the Hanau's Quint/Thielman's factors, What is the most recommended adjustment for setting denture teeth?

MINIMIZE INCISAL GUIDANCE

Thielman's formula: can you alter Occlusial plane very much?

NO, functional requirements dictate position

Thielman's formula: what is the recommendation for the amount of cuspal inclination?

REDUCE cuspal inclination to help reduce horizontal forces of occlusion

Thielman's formula: The __________ is very helpful in obtaining balanced occlusion and depending on the posterior tooth forms it can EASILY be corrected to facilitate posterior tooth contacts in eccentric positions.

Compensating Curve

What are the two factors in Thielman's formula that are easiest to alter to obtain balanced occlusion?

incised guidance and compensating curve

HAHA in the PPT (not the manual)...WHERE is the Max 1st molar- MB cusp? ML? DB cusp? DL cusp?

MB-on the plane, ML-on the plane, DB-.5mm off, DL-.5mm off

How far off the occlusal plane is the max second molar?

1mm

How many contacts do we need in working side and balancing side to officially have balanced occlusion?

2 working, 1 balancing