Occlusion Bootcamp Flashcards by Annabella Moody

Static relationship between the incising or masticating surfaces of the maxillary & mandibular teeth:

Occlusion

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_____ is the way teeth are shaped; ____ is the way teeth fit together

Morphology; occlusion

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The tightest or best fit between maxillary & mandibular teeth

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Is CR affected by malocclusion?

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A relationship between the teeth that is irrespective of tooth position or vertical dimension:

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What position is used when mounting diagnostic casts of our patients teeth?

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What determines centric relation?

Ligaments NOT teeth

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Fibrocartilage present between the mandible & elements of articular eminence:

Articular disc

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Retrodiscal tissue is _____ to the mandible

Posterior

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If CR and MIP do not exist together, this is because there has to be a:

Prematurity or deflective occlusal contact

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The average plane established y the incisal & occlusal surfaces of the teeth

Occlusal plane

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The anteroposterior (or mesiodistal) curvature of cusps tips of the teeth:

Curve of Spee

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Mandibular Curve of Spee:

Maxillary Curve of Spee:

Mandibular: Concave

Maxillary: Convex

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anteroposterior:

Front to back- anterior teeth to posterior teeth

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The mediolateral curvature of the cusp tips of the teeth:

Curve of Wilson

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The Curve of Wilson is the _____ curvature of the cusp tips of the teeth

Mediolateral

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The curve of Wilson spans from the:

Right to the left side of the arch

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Side-to-side:

Front-to-back:

Curve of Wilson

Curve of Spee

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Curve of Wilson in mandible can be described as:

Curve of Wilson in the maxilla can be described as:

Concave

Convex

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Functional/working cusps are cusps that are _____

Centric

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Hold the vertical dimension of occlusion:

Functional/working cusps

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Functional/working cusps function in:

Mastication

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Functional/working cusps come down in the _____ when they occlude

Opposing tooth’s central fossa

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Functional/working cusps of maxillary teeth:

Lingual cusps

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Cusps that do not occlude in the central fossae of occluding teeth:

Non-functional cusps

Non-functional cusps of maxillary teeth:

Buccal cusps

Functional/working cusps of the mandibular teeth:

Buccal cusps

Non-functional cusps of the mandibular teeth:

Lingual cusps

Working/functional cusps occlude in the ____ of opposing teeth

Central fossae

Orthodontic classifications based on the locations of the maxillary & mandibular first molars

Angle's Classification

What is the ideal Angle's classificaiton?

Class I

Angle's Class II & III are considered:

Malocclusion

The MB cusp tip of the maxillary first molar is aligned with the MB groove of the mandibular first molar:

Angle's Class I

The maxillary canine fits in the facial embrasure between the mandibular canine and the premolar:

Angle's Class I

The resulting profile of Angle's Class I:

Orthognathic

No protrusion or retrusion of the mandibule relative to the maxilla:

Orthognathic

The MB cusp of the maxillary first molar is mesial to the MB groove to the mandibular first molar:

Angle's Class II

The resulting facial profile from an Angle's Class II:

Retrognathic

The mandible is retruded relative to the maxilla:

Angle's Class II

Overbite:

Angle's Class II

The MB cusp of the maxillary first molar is distal to the MB groove of the mandibular first molar:

Angle's Class III

The facial profile resulting from Angle's Class III:

Prognathic

The mandible protruded relative to the maxilla:

Prognathic

Underbite:

Angle's Class III

Typically, anterior teeth are ______ inclined

Labially

When you set teeth in a dentures course, you will set maxillary anterior teeth with a _____

10 degree labial inclination

Incisal edges of mandibular incisors should contact the _____ surfaces of maxillary incisors

Lingual

The contact of the incisal edges of mandibular incisors contacting the lingual surface of maxillary incisors should contact approximately ____ gingival to the incisal edge

4 mm

For anterior teeth a class II division I results in:

Deep bite (incisal edge of mandibular incisor is contacting lingual cervical portion of the maxillary central incisor

For anterior teeth a class II division II results in:

The typically class I contact being pushed upward cervically

The most common result of a class III malocclusion is:

End to end contact of incisors

Class III malocclusion can cause end to end incisal contact, but also:

Underbites & anterior open bite

A tooth that is overly erupted and abnormally long as a result:

Supreruption

Often the result of no functional contact between the tooth in question and a tooth in the opposing arch:

Supraeruption

An abnormal twisting of the tooth:

Torsiversion

A tooth that is out of alignment to the labial compared to the ideal arch

Labioversion

Due to mesial drift of posterior teeth, anterior teeth can crowd. The result is overlapping teeth and abnormal tooth-to-tooth contacts:

Crowding

Often seen in lower anterior teeth:

Crowding

When a short primary tooth is retained into adulthood, its cementum can fuse to surrounding bone stopping its eruption:

Ankylosis

Extractions of ____ teeth can be difficult

Ankylosed

The distance between a selected point on the mandible & a selected point on the maxilla:

Occlusal vertical dimension (OVD)

When measure OVD we place the teeth in:

CR or MIP

The position of the mandible when all the muscles that support it are completely at rest

Physiological rest position (PRP)

When in physiological rest position, there is typically a space between the maxillary and mandibular incisors, this space is called:

Interocclusal rest space

Interocclusal rest space is typically:

2-4 mm

What are the major movements of the mandible that occur in the opening process?

Rotation & Translation

Rotation is a purely rotational movement where the body of the mandible:

Rotates around a fixed horizontal axis line

Purely rotational movements, where the body of the mandible rotates around a fixed horizontal axis line, can be described as:

Hinge-like movement

Where does rotation occur:

In the lower joint space of the TMJ

What occurs after rotation when the mouth has opened about half-way?

Translation

During translation, the mandibular condyles & discs:

Translate forward onto the articular eminences

Full movement of the mandible that moves the entire mandible down and forward, which occurs in the upper joint space of the TMJ:

Translation

Type of movement that occurs in the LOWER JOINT SPACE:

Rotation

Type of movement that occurs in the UPPER JOINT SPACE:

Translation

Any movement of the mandible from MIP that results in tooth contact:

Eccentric movement

Any movement of the mandible away from CR include:

Protrusive movements Laterotrusive movements Retrusive movements

Protrusive, laterotrusive & retrusive movements can all be considered:

Eccentric movements

Movement that occurs when the mandible moves anteriorly:

Protrusive movement

During a protrusive movement, both anterior condyles and their articular discs:

Move forward in their fossa

During a protrusive movement, the slopes of the articular eminences guide:

The mandible down & forward

The result of a protrusive movement in a class I occlusion:

Incisors sitting end-to-end in relation to one another