L2- Extra oral exam Flashcards
(43 cards)
symmetrty lines
Glabela- subnasale and pogonion
Glabela- subnasale
reference line in symmetry
evaluate position of chin with
pogonion line
assess midline in what view
frontal view
T/F can have symmetrical face but no symmetry
true – you can have a midline shift
vertical proportions
- basic
usually in thirds – should all be the same
lateral view is what plane
sagital plane
key area for face esthetics
inferior third of the face
key area for face esthetics
inferior third of the face
ricketts esthetic plane
tip of nose – pogonion
lower vermillion border in relation to E plane
O to +3mm from E plane
Ricketts esthetic plane affected by
tooth position and inclination
distance increases with growth or aging
naso-labial angle formed betwee
nose and upper lip
normal values of nasolabial angle
90-110 degrees
nasolabial angle affected by
LIP - upper incisors position and their incliniation
NOSE - cannot be modified with ortho
frontal view shows us
frontal - transverse plane
cephalic index - Cl
symmetry
vertical proportions
lip functin
smile esthetics
cephalic index
an anthropometric value based on the ratio between the width and length of the head
max head width X 100 DIVIDED by maximum head length
mesocephalic CI
mesoproscopic / normocephalic
CI = 79= 81
represents balanced growth and harmonic facial proportions
mesoproscopic / normocephalic
mesocephalic
CI that represents balanced growth
79-81
CI greater than 81 represents
brachycephalic / euryproscopic = SHORT WIDE FACE AND COUNTER-CLOCKWISE GROWTH
associated with deep bite
class II div 2
strong musuculature
bruxers
class II div 2 and counter clockwise grwoth considered
brachycephalic – CI> 81
CI < 79
Doluchocephalic / leptoprosopic
Doluchocephalic / leptoprosopic
CI < 79 –> CLOCKISE RITATIONAL GROWTH