Week 1 &2 Flashcards

1
Q

4 requirements for diagnostic casts….

A
  1. Must be accurate reproduction of both arches
  2. Should contain no bubbles
  3. Should contain no positive nodules on occlusal surfaces.
  4. Questionable impressions and casts should be discarded.
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2
Q

What are the 2 schools of thought regarding articulator design?

A

Geometric (Non-anatomic) = teeth guide movement

Condylar (Anatomic)

  • Average value instruments
  • Adjustable condylar guides
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3
Q

Describe the equilateral triangle theory….

A
  • Condyle to condyle = 10cm
  • Condyle to incisor = 10 cm
  • Makes bonwill triangle
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4
Q

Describe the Balkwill angle…

A

Angle formed btwn the occlusal plane and the Bonwill triangle. *about 26 degrees

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5
Q

Center of curve of spee is where?

A

@ the level of the mid orbital plane.

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6
Q

What is Christensen’s Phenomenon?

A

Space formed between maxilla and mandible during protrusion of mandible.
*Christensons articulator proved protrusion can occur along a curved path.

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7
Q

What is monsons spherical theory?

A

Center of rotation is in the sella tursica.

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8
Q

What is curve of speed and wilson?

A

Spee is posterior to anterior

Wilson side to side

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9
Q

Describe Halls conical theory of mandibular movement…

A

The external occipital protuberance was considered as the anatomic rotation.

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