ABO Dentofacial Orthopedics Flashcards
6 cards from real ABO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 ABO Dentofacial Orthopedics flashcards as text
The Frankel appliance (function regulator) corrects Class II malocclusion primarily through:
Answer: Eliminating abnormal lip and cheek muscle pressure, allowing the dental arches to develop
The Frankel appliance uses vestibular shields to remove lip and cheek pressure, providing an environment for unrestricted arch development.
Which cephalometric measure is most commonly used to quantify the degree of mandibular advancement achieved by functional appliance therapy?
Answer: SNB angle
The SNB angle measures the anteroposterior position of the mandible relative to the anterior cranial base, so an increase indicates mandibular advancement.
Orthopedic treatment of a Class II skeletal patient is most effective when initiated:
Answer: During the pubertal growth spurt (peak growth velocity)
Functional appliance therapy achieves the greatest skeletal effect when timed with the pubertal growth spurt because condylar growth potential is maximal.
Slow maxillary expansion using a removable appliance achieves expansion primarily through:
Answer: Dentoalveolar tipping of the posterior teeth
Removable slow expanders produce mainly dentoalveolar buccal tipping of the upper posterior teeth rather than true sutural opening.
The Andresen activator corrects Class II malocclusion by:
Answer: Advancing and posturing the mandible forward during sleep
The Andresen activator holds the mandible in a protruded position during sleep, directing condylar growth and restricting maxillary forward displacement.
Cervical vertebral maturation (CVM) stage CS3 indicates:
Answer: The peak of the pubertal growth spurt
CVM stage CS3, characterized by concavities on the lower borders of C2 and C3, corresponds to the onset and peak of the pubertal growth spurt.