Orthodontics Final Flashcards
Class II: The upper MB cusp is ____ to the buccal groove of the mandibular first molar
Mesial to
T/F: Interceptive care is best started as soon as the first permanent tooth erupts
True
T/F: Rotated anterior teeth take up less space than when aligned properly
True
T/F: Rotated posterior teeth take up less space than when properly aligned
False
Mesenchymal cells differentiate into:
-osteoblasts
-cementoclasts
-fibroblasts
(all of the above)
What is the function of the principle fibers in the PDL:
-Absorb heavy forces
-Attach tooth to alveolar bone
Bone apposition occurs on the:
tension side
Hyalinization is defined as:
Bone resorption that is indirect & undermining
T/F: The most prevalent etiologic factor for malocclusion is environmental
False
T/F: Angles classification is classified in the transverse plane
False
Class II malocclusions are caused by:
Mandibular retrognathism
The highest prevalence of Class III malocclusions are present in:
Southeast asia
Patient has a transverse posterior lingual cross bite, what is the most common reason for it:
Underdeveloped maxilla
What correlated to a deep bite:
-skeletal
-dental
-something else
-all of the above
What is the most common problem presented with a maxillary lateral incisor:
peg shaped
What is is ectodermal dysplasia presented with?
Oligodontia and abnormally shaped teeth
T/F: Early exfoliation of a primary molar causes an arch length discrepency
True
What is the bolten ratio for anterior teeth?
77%
T/F: For severe crowding, the lateral incisor will contact the mesial aspect of the deciduous molar
True
T/F: you need radiographs for moyers
False
Where are primate spaces located?
Mesial to upper primary cuspid & distal to lower primary cuspid
Class III occlusion may also be called:
Mesiocclusion
Which is not a prerequisite for serial extraction?
Deep bite
Which of the following is NOT a benefit of serial extraction?
Lingualization of the incisors
T/F: The alveolar bone height effects the location of the center of resistance
True
Force applied in the middle of the center of resistance results in:
pure translation
The patient had a reduced horizontal bone, if you apply a force on the crown, what would occur?
More tipping
Force coupling results in:
Pure rotation
T/F: Interdisciplinary care is different from multidisciplinary care:
True
T/F: Generally primary posterior teeth are larger than their successor:
True
T/F: The 6 keys of normal occlusion were studied on radiographs
False
T/F: Orthodontics is primarily focused on esthetics
True
T/F: Premolars are present in the early mixed dentition:
Flase
T/F: If you extract a tooth that has a root that is 2/3 developed it will slow the eruption
False
