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Cariology > Getting Acquainted with the Articulators > Flashcards

Getting Acquainted with the Articulators Flashcards

1
Q

What is an articulator?

A

A mechnaical device for mounting casts of a patient’s dental arches so that various dental procedures and tasks can be carried without the presence of the patient.

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2
Q

What is a class I articulator?

A

A simple holding instrument capable of accepting a single static registration; vertical motion is possible.

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3
Q

What type of articulator is a class I articulator?

A

Non-adjustable. The simplest type and the most limited in dentistry.

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4
Q

What position does the class I articulator reproduce?

A

One specific occlusal contact position which is usually the maximum intercuspal position.

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5
Q

What kind of motion does the class II articulator do?

A

It can move horizontal and vertical motion but does not orient the motion of the TMJ.

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6
Q

What type of articulator is the class II articulator?

A

Non-adjustable articulator.

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7
Q

What are class II articulators most often used for?

A

A restoration of a single crown because of its low cost and ease.

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8
Q

What is the largest disadvantage to using a non-adjustable articulator?

A

The increase in time in adjusting the restoration intraorally because of its inaccurate eccentric movement.

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9
Q

What is the result of inaccurate eccentric movement?

A

Poor anatomic form and occlusal relationships of final restorations.

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10
Q

What is a class III articulator?

A

An instrument that simulates condylar pathways by using averages or mechanical equivalents for all or part of the motion.

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11
Q

What type of articulator is a class III articulator?

A

A semi-adjustable. Can be arcon or non-arcon.

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12
Q

What type of articulator do we use for class?

A

A semi-adjustable arcon Denar 330 class III articulator.

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13
Q

What does it mean to be an arcon articulator?

A

It has condylar elements on the lower member and condylar guidance on the upper member.

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14
Q

What are some common adjustments found on semi-adjustable articulators?

A

1) Condylar inclination
2) Lateral translational movement (Bennet angle and immediate side shift)
3) Condylar distance

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15
Q

What adjustments does our Denar 330 have?

A

1) Condylar inclination

2) Lateral translational movement

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16
Q

What condylar distance is our Denar 330 fixed to that cannot be adjusted?

A

110mm.

17
Q

What is a class IV articulator?

A

An instrument that will accept three-dimensional dynamic registration and allow for orientation of the casts to simulate the TMJ and mandibular movements.

18
Q

What type of articulator is a class IV articulator?

A

Fully adjustable articulator.

19
Q

How many possible adjustments can a fully adjustable articulator perform?

A

14

20
Q

What can the articulator do if the centric lock is closed?

A

The articulator only has hinge like open and closing movements.

21
Q

What can the articulator do if the centric lock is open?

A

The articulator has lateral and forward movements.

22
Q

What does the condylar housing represent?

A

The fossa of the TMJ.

23
Q

What does the condylar inclination represent?

A

The shape and steepness of the articular eminence.

24
Q

What is another name for condylar inclination?

A

Horizontal condylar inclination.

25
Q

What does the lower member represent and attach to?

A

The mandible and attaches to the lower cast.

26
Q

What does the upper member represent and attach to?

A

The maxilla and attaches to the upper cast.

27
Q

What does the incisal pin represent?

A

The incisal edges of the lower anterior teeth.

28
Q

What does the mechanical table represent?

A

The lingual surfaces of the upper anterior teeth.

29
Q

Where does the condylar balls fit into and what does it represent?

A

It fits into the condylar housing and represents the condyles of the TMJ.

30
Q

What do you set our condylar inclination to?

A

30

31
Q

What do you set your Bennet angle to?

A

15

32
Q

What do you set your immediate side shift to?

A

0

Cariology (5 decks)

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