Dental Articulators and Their Functions

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What is the primary purpose of an articulator in dentistry?

To create dental casts

To simulate mandibular movements (correct)

To measure jaw size

To adjust occlusion

Which class of articulator allows for three-dimensional dynamic registrations?

Class III

Class IV (correct)

Class II

Class I

Which type of motion is NOT permitted by a class I articulator?

Horizontal motion (correct)

Rotational motion

Vertical motion

Static registration

What type of articulator represents average condylar pathways?

Class III articulator (D) Signup and view all the answers

What is a key feature of Gariot's articulator?

Allows centric occluding relation (C) Signup and view all the answers

Which of the following articulators has a mechanism for condylar guidance?

Mean value articulator (B) Signup and view all the answers

What does a class II articulator primarily lack compared to higher classes?

Orientation to the temporomandibular joint (A) Signup and view all the answers

What is the role of the condylar rods in the maxillary face-bow?

To ensure equal calibrations with slight tension. (B) Signup and view all the answers

Which of the following parameters is NOT directly related to articulators?

Dental impression technique (D) Signup and view all the answers

Which anatomical structure is used as a reference point in the ear piece face-bow?

External auditory canal (C) Signup and view all the answers

In cases of complete dentures, what is primarily unnecessary for the fabrication process?

Facebow orientation (C) Signup and view all the answers

What is one significant benefit of using a facebow during the denture fabrication process?

It reduces the complexity of the articulating process. (C) Signup and view all the answers

What does the arbitrary facebow primarily rely on for recording maxillary position?

Facial and anatomical landmarks (C) Signup and view all the answers

What is the expected accuracy of an arbitrary facebow in placing the articulator hinge axis?

Within 6 mm of the true hinge axis more than 80% of the time. (B) Signup and view all the answers

The type of occlusal scheme impacts the need for what during the denture fabrication process?

Interocclusal records for condylar inclination programming (A) Signup and view all the answers

What should be ensured when tightening the clamp on the condylar rods?

The rods should display equal calibrations. (A) Signup and view all the answers

Why is extreme accuracy in programming articulators considered difficult for complete denture patients?

Record bases are mobile and rest on movable tissues. (C) Signup and view all the answers

What is the primary benefit of using an articulator for occlusal adjustments in denture patients?

It ensures proper occlusal and aesthetic placement of artificial teeth. (B) Signup and view all the answers

What is the purpose of indexing casts before mounting them on an articulator?

To allow for accurate replacement of the casts. (B) Signup and view all the answers

Which step should be performed when mounting master casts on a fixed condylar path articulator?

Painting the basal surface of the cast with a separating medium. (B) Signup and view all the answers

What technique is used to correct occlusal errors in finished dentures?

Remounting the dentures to original plaster for adjustments. (D) Signup and view all the answers

What should be aligned with the tip of the incisal indicator pin when relating the cast to the articulator?

The midline of the occlusion rim. (D) Signup and view all the answers

What is the purpose of the Bonwill triangle in the use of an articulator?

To mount the upper cast (D) Signup and view all the answers

What is considered unnecessary for edentulous patients when using complex articulators?

Exact accuracy in movements. (D) Signup and view all the answers

In a semi-adjustable articulator like the Hanau Model H, how is the horizontal condylar path angulation adjusted?

By obtaining a protrusive record from the patient (C) Signup and view all the answers

Which of the following should be done to the wax rim before fixing it to the occlusion plane table?

It should be temporarily fixed to the table with wax. (C) Signup and view all the answers

What does Hanau's formula help to determine?

The lateral condylar path inclination (C) Signup and view all the answers

Which type of articulator allows for both horizontal and lateral inclinations to be adjusted?

Fully-adjustable articulator (B) Signup and view all the answers

Which record is needed to adjust the right lateral condylar path inclination in a fully-adjustable articulator?

Right lateral record (C) Signup and view all the answers

What is the angle range of the condylar path in articulators measured from the horizontal plane?

30° to 35° (A) Signup and view all the answers

What does the Denar II articulator exemplify?

Fully-adjustable articulator (A) Signup and view all the answers

Which of the following is NOT accepted as a record in a fully-adjustable articulator?

Face bow record (C) Signup and view all the answers

What is the primary function of a face bow?

To record the relationship between the maxilla and the rotational axis of the mandible. (A) Signup and view all the answers

What is a characteristic of the mandibular face bow?

It includes a U-shaped bow and a clamp that attaches to the mandible. (D) Signup and view all the answers

Which of the following components is NOT part of the kinematic face bow?

Pin locator. (C) Signup and view all the answers

What is the purpose of the anterior reference pointer in the maxillary face bow?

To relate the base plate and occlusion rim to the horizontal plane of the articulator. (C) Signup and view all the answers

Which type of face bow is also known as the maxillary face bow?

Arbitrary face bow. (B) Signup and view all the answers

How is the bite fork positioned in relation to the occlusal plane?

Parallel to the occlusal plane. (D) Signup and view all the answers

What measurement indicates the location of the condylar rods on a maxillary face bow?

13 mm in front of the tragus. (A) Signup and view all the answers

What is a common feature of both types of face bows?

Incorporation of a universal joint. (D) Signup and view all the answers