Part 3 Theories

Question 1

Who discussed using facial esthetics as a guide for VDO?

Answer 1

Turrell

He observed the harmony of the lower 1/3 of the face with the rest
of the face, lip contour, appearance of skin from margin of lower lip to lower chin border, and looked at the labiomental angle and stated that the difference between VDO and
VDR should be barely detectable.

Question 2

VDR vs. VDO assessment?

Answer 2

Pleasure points: measurements of VDR and VDO with markings on the nose and chin

Instruct patient to swallow and relax jaw with eyes closed to determine VDR

Shanahan used swallowing to find VDO with wax rims

say “m” (Schlosser)

Tallgren found no difference in 3 different methods of VDR: fatiguing, phonetics, no command relaxation

Question 3

What is the average interocclusal rest space?

Answer 3

Boucher: 2-4mm

Pound: depends on skeletal classification
- class I: 3-5mm
- class II: >5mm
- class III: <3mm