Occlusion - principles of articulators Flashcards

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1
Q

What is a dental articulator?

A

mechanical device which represents the temporomandibular joint and jaw members, to which maxillary and mandibular casts attach

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2
Q

How can articulators be used in diagnosis?

A

they enable the dentist to observe various occlusal relationships.

they also enable diagnostic waxing and tooth repositioning to be carried out

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2
Q

what are articulators used for?

A

diagnosis
restoration

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2
Q

What is RCP and ICP?

A

RCP = retruded contact position

ICP = intercuspal position

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3
Q

What is the main reason for mounting study casts?

A

the initial tooth contact in RCP

the slide from RCP to ICP

lateral and protrusive occlusal contacts

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4
Q

What is the most useful registration for restorative dentistry?

A

intercuspal position = ICP

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5
Q

What are the requirements of the dental articulators?

A

vertical dimension
stability of the mounted position
intercuspal position
lateral excursion
aesthetic perspective

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6
Q

What are the disadvantages of hand held casts?

A

cannot reproduce the centric relation

cannot be closed together

accurate representation of aesthetics are not good

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7
Q

What do you use hand held cats for?

A

ICP

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8
Q

What are types of articulators and cast holders?

A

simple hinge articulators

fixed or mean value condylar path articulators

adjustable condylar path articulators

semi-adjustable condylar path articulators

fully-adjustable condylar path articulators

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9
Q

What are you looking for when doing facebow mounting?

A

signs of breakdown or occlusal instability

am i restoring more than 2 teeth in the arch or am i increasing the vertical dimension

if yes then take a facebow and mount the diagnostic cast on a semi-adjustable articulator

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10
Q

What is the purpose of a facebow?

A

to transfer both aesthetic and functional components from the patient to the articulator

very efficient

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11
Q

What is a facebow record?

A

records the orientation of the maxilla to the terminal hinge axis

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12
Q

What is the hinge axis?

A

hypothetical axis between the 2 condyles

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13
Q

What is the role of the articulator?

A

TRANSFERS THE RELATIONSHIP OF THE MAXILLARY ARCH AND TMJ TO CASTS

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14
Q

What movement does the articulator mimic?

A

TMJ …mandibular

15
Q

What are the movement of articulators?

A

opening and closing

protrusive movement at a fixed horizontal condylar path angle

16
Q

What articulator would you use for single crown?

A

semi-adjustable