Ortho Flashcards
Dolichocephaly vs Brachycephaly
Dolichocephaly: head is longer than would be expected
Brachycephaly: skull shorter than typical for its species
wiki
Growth of mandible:
Endochondral
intramembranous
both
Growth of the mandible is both endochondral and intramembranous (mosby)
Which tissue show most growth in first 6 years and then plateaus? lymph, neural,
genital
neural
wrist radiograph vs ceph
wrist: Used in PREDICTING the time of the pubertal growth spurt because physical maturity and skeletal development correlates well with jaw growth.
ceph: Can be used to evaluate whether growth has stopped or is continuing
(FA)
What is the best revealing tool for prediction about ossification?
prediction = wrist radiograph
FA
Eruption sequence of peds in order
central - lateral - 1M - K9 - 2M
Frankl Behavior Rating Scale
1 is (--) 2 is (-) 3 is (+) 4 is (++)
most stable and most unstable ortho surgeries
Most to least stable: max up > mand forw > chin any direction … > mand back > max down > max wider
class II div 1 and 2
FA121
Class II, Division 1: Maxillary incisors (centrals and laterals) in extreme labioversion (protruded).
■ Class II, Division 2: Maxillary centrals tipped palatally and in a retruded position (linguoversion). The maxillary laterals are typically tipped labially and mesially.
what type of malocclusion is most common?
Class I, II, III
class I (crowding) (lec)
what percent have normal class I occlusion
30%
lec
most common patients to have anterior tooth fractures? Class I Class II div 1 Class II div 2 Class 3
Class II div 1
leeway space vs e-space
Leeway space: The space difference between primary canine, first & second molar and the succedaneous teeth
e-space: space difference btwn primary 2nd molar and the succedaneous tooth
Moyers mixed dentition analysis
Measure total width of permanent mandibular incisors, use table to predict width of permanent canines and premolars
(lec)
tanaka/johnson
One half the width of permanent mandibular incisors + 10.5 mm = estimated width of mandibular canines and premolars in one quadrant
One half the width of permanent mandibular incisors + 11.0 mm = estimated width of maxillary canines and premolars in one quadrant
fact:
early mesial shift: primate space (mand)
late mesial shift: Leeway space
fact:
early mesial shift: primate space (mand)
late mesial shift: Leeway space
10 year old loses primary first molar, space maintenance?
- nothing
- band loop
- distal shoe
none, PMs are about to erupt
The space for the eruption of permanent mandibular second and third molars is created
by the
A. apposition of the alveolar process.
B. apposition at the anterior border of the ramus.
C. resorption at the anterior border of the ramus.
D. resorption at the posterior border of the ramus.
C. resorption at the anterior border of the ramus.
asda
A light force applied to the periodontal ligament during orthodontic treatment is considered?
a. intermittent
b. direct
c. continuous
d. indirect
direct
Which of the following soft tissue elements (fibers) are commonly associated with relapse
following orthodontic rotation of teeth
supracrestal - mainly transseptal
FA, know both
frankfort and fox plane and campers line
-landmarks
Frankfort = porion (upper external auditory meatus) to orbitale (inferior border of orbit)
Fox plane is parallel to the Campers line (ala-tragus)
(fox plane is the instrument)
when does cleft lip happen?
8-10 wks in utero
Cleft palate
o Environmental
o Genetic
o Multifactorial
multifactorial
FA
Cleft lip and Cleft palate are malunion of …
Cleft lip: malunion of Max process and Medial nasal process
Cleft palate: malunion of palatal shelf
Occurrence of cleft lip
1:1000
moderate crowding
<4mm/arch
What happens with intercanine distance after mixed dentition?
a. increased
b. decreased
c. stable, no change
a. increased
asda
