Lecture 4/5

Question 1

Importance of Articulator Mounting

Answer 1

Easy to link 1 and 2 together, as they don’t move.

link 3 to 2 later on. Simplistic, but helps.

Question 2

Frankfort horizontal plane

Answer 2

Line that

defines the horizontal plane of the skull (i.e., 0o) so that other measures can be made more accurately.

Question 3

Forion

Answer 3

upper ear and (lower rim of orbit (orbital) (for frankfort horizontal plane)

Question 4

Ala-Tragus plane (Camper’s Plane)



Answer 4

Aesthetic line - get teeth
horizontal to this plane.
This is based on soft tissue, not
bone or anthropology.

Question 5

Arcon articulator question

Answer 5

Famous exam question - made up term from articlating condyle. In essence,
condyle in articulator matches human anatomy. If you were to unlock your machine,
you find that they match.

Question 6

Non-arcon articulators

Answer 6

Condyle part of maxillary - in essence, articulator in reverse. Same function.

Question 7

Bennett’s side shift

Answer 7

As it moves/rotates, it looks like it shifts sideways.

Question 8

Mandibular lateral translation/Bennett’s side shift

Answer 8

forward, downward, right. This can reflect in cusp heights.

Question 9

Triangular ridges

Answer 9

convex in all directions

Question 10

Increased VO vertical overlap

Answer 10

allows longer cusps

Question 11

Decreased VO

Answer 11

requires shorter cusps

Question 12

Increased HO requires horizontal overlap

Answer 12

shorter cusps

Question 13

Decreased HO

Answer 13

allows longer cusps