Ortho/Pedo 2 Flashcards
What is the treatment for a posterior skeletal crossbite?
Expansion lingual arch (slow continuous) for primary and early mixed dentition
- palatal expansion (rapid or slow) for late mixed
Needs to be completed PRIOR to the end of growth spurt.
When should palatal expansion be completed?
Prior to end of growth spurt
In rapid palatal expansion, you get ___ activation and expansion/day. It exerts __-__lb pressure. It causes ___ in the sutures.
0.5mm
10-20lb pressure
Microfractures in interdigitated bone spicules
In slow palatal expansion, it allows for ___mm expansion per week. ___lb pressure.
1mm
2lbs
Suture stays in tact, same long-term results with less trauma
What kind of palatal expansion devices do you use for preadolescent?
Quad helix or W arch
What kind of palatal expansion device do you use for adolescents?
Rapid or slow palatal expander
What is a common side effect of palatal expansion?
Tends to extrude posterior teeth and cause anterior open bite
What is the treatment for excess overjet?
Class 2 elastics
Tip back maxillary incisors with removable
What is the difference between simple and complex anterior open bite?
Simple = dental
Complex = skeletal
Simple anterior open bite is often due to ___
Prolonged thumbsucking habit in childhood
What is the clinical presentation of prolonged thumbsucking habit?
Flaring maxillary incisors, lingual tipping mandibular incisors (overjet)
Maxillary constriction (posterior crossbite)
Overeruption of posterior teeth
Open bite
What is the treatment of simple anterior open bite if the patient is in primary dentition?
No treatment
What is the treatment of simple anterior open bite in mixed dentition due to thumbsucking?
Thumbsucking therapy
A complex anterior open bite is a ___ found in adults and adolescents. They have a __ face appearance. Name 4 features of complex anterior open bite.
Vertical discrepancy
Long
Posterior maxilla tips down
Downward and backward rotation of mandible
Steep MPA
Excessive eruption of posterior teeth
What is the treatment for a complex anterior open bite for adolescents? What about adults
Adolescents = growth modification
Adults = jaw surgery
What kind of growth modification device can be used to treat complex anterior open bite?
High pull headgear
How does high pull headgear work?
Maintains vertical position of maxilla
Intrude upper molars and closes bite
Force vectors should be placed through the trifurcation so no tipping occurs
Attached to maxillary splint for all maxillary teeth
(Very tough to treat, poor prognosis)
How can bite blocks be used to treat complex anterior open bite?
Blocks eruption of posterior teeth
Allows eruption of anterior teeth
Usually combined with functional appliance.
In dental deep bite there is overeruption of ___ incisors. It is class __ malocclusion. What is the treatment?
Mandibular
2
Intrude anteriors
Allow eruption of posterior
What are 5 features of a skeletal deep bite?
Long mandibular ramus
Upward and forward rotation of mandible
Low MPA
class 2 division 2
Decreased eruption of posterior teeth
What kind of growth modification device is used to treat skeletal deep bite? How does it function?
Cervical pull headgear
Extrudes upper molars and opens bite
Which is easier to treat via growth modification, complex anterior open bite or skeletal deep bite?
Skeletal deep bite
How does the deep bite functional appliance work?
Only allows mandibular posterior teeth to erupt
Levels an excessive curve of spee
