Lecture 9 Flashcards
T/F thumb-sucking is a conscious choice patients make
false
- hard habit to break
- may need an appliance to break habit
Ortho appliances make finger sucking ______ or ______ to remind px to stop it
weird or painful
sucking habits can cause what 2 things?
1-narrow maxillary arch
2-bilateral posterior crossbite
Maxillary and mandibular incisors will move in what directions to accommodate finger sucking?
max: flare buccally
mand: recline lingually
*cause anterior open bite
if the hand rests on a finger-suckers chin, what happens?
can cause retarded growth resulting in class 2 profile
What causes crenated tongue?
compression of tongue against adjacent teeth
*aka scalloped tongue
T/F if px don’t manage their tongue habits, relapse is common
true
tongue pressure can cause _______, _____, and _____ loss
root, bone, gingiva
many ortho options are only present when ______ is occuring
growth and potential of growth
*surgery after growth
Ortho forces applied to teeth have the potential to radiate ______
outward
*affects distinct locations
what kind of pressure would decrease the growth of the bone?
resisting pressure
adding forces that pull the max or mand downward and forward should ________ their growth
increase
where do extra oral forces applied to the maxillary teeth go?
sutures of the maxilla
what directions does an occipital pull head gear restrict?
anterior/posterior and vertical dimensions
what’s the point of restricting maxillary growth?
allows for the mandible of someone in a class 2 to “catch up”
What are the 2 headgear components?
1-outer bow- different lengths
2- inner bow0sized to fit max. 1st molars
how long should headgear be worn?
10-12 hours/day
*8h minimum
what is the ideal amount of force for orthopedic changes?
250-450g per side
what is the greatest advantage of extra oral anchorage?
it permits posterior movement of teeth in one arch without adversely disturbing the other
What does headgear with occipital pull do?
restricts inferior and anterior max. growth
what does headgear with cervical pull do?
restricts superior and anterior maxillary growth
*can extrude max. molars and cause open bite
what does headgear with combination pull do?
restricts anterior maxillary growth
