Dental Articulators and Their Functions
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Questions and Answers

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?

<p>Class III articulator (D)</p> Signup and view all the answers

What is a key feature of Gariot's articulator?

<p>Allows centric occluding relation (C)</p> Signup and view all the answers

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

<p>Mean value articulator (B)</p> Signup and view all the answers

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

<p>Orientation to the temporomandibular joint (A)</p> Signup and view all the answers

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

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

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

<p>Dental impression technique (D)</p> Signup and view all the answers

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

<p>External auditory canal (C)</p> Signup and view all the answers

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

<p>Facebow orientation (C)</p> Signup and view all the answers

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

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

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

<p>Facial and anatomical landmarks (C)</p> Signup and view all the answers

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

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

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

<p>Interocclusal records for condylar inclination programming (A)</p> Signup and view all the answers

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

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

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

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

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

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

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

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

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

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

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

<p>Remounting the dentures to original plaster for adjustments. (D)</p> 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?

<p>The midline of the occlusion rim. (D)</p> Signup and view all the answers

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

<p>To mount the upper cast (D)</p> Signup and view all the answers

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

<p>Exact accuracy in movements. (D)</p> Signup and view all the answers

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

<p>By obtaining a protrusive record from the patient (C)</p> 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?

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

What does Hanau's formula help to determine?

<p>The lateral condylar path inclination (C)</p> Signup and view all the answers

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

<p>Fully-adjustable articulator (B)</p> Signup and view all the answers

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

<p>Right lateral record (C)</p> Signup and view all the answers

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

<p>30° to 35° (A)</p> Signup and view all the answers

What does the Denar II articulator exemplify?

<p>Fully-adjustable articulator (A)</p> Signup and view all the answers

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

<p>Face bow record (C)</p> Signup and view all the answers

What is the primary function of a face bow?

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

What is a characteristic of the mandibular face bow?

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

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

<p>Pin locator. (C)</p> Signup and view all the answers

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

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

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

<p>Arbitrary face bow. (B)</p> Signup and view all the answers

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

<p>Parallel to the occlusal plane. (D)</p> Signup and view all the answers

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

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

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

<p>Incorporation of a universal joint. (D)</p> Signup and view all the answers

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