Functional Appliances

Question 1

two types of facial bone formation

Answer 1

intra-membranous
endochondral

Question 2

skeletal effects of a functional appliance

Answer 2

forward displacement of mandible
backwards displacement of maxillary arch
accelertes condylar growth
redirects condylar growth

Question 3

dentoalveolar effects of functional appliance

Answer 3

retracts upper teeth
proclines lower teeth

Question 4

how does a functional appliance work

Answer 4

stretches the muscles of mastication
posture mandible
differential tooth eruption

Question 5

functional appliance definition

Answer 5

appliance that utilises or redirects the masticatory muscles or produce or permit tooth movement and may modify facial growth

Question 6

indications for a functional appliance

Answer 6

motivated
pre-adolescent
skeletal discrepancy mild or moderate
increased overjet (if class II)
proclined maxillary incisors (if class II)
well aligned arches

Question 7

contraindications of functional appliance

Answer 7

poor motivation
over 14 years old
poor dental health
condylar disease - juvenile rheumatoid arthritis
proclined lower incisors

Question 8

advatnages of functional appliance

Answer 8

removable
may avoid extractions
accelerates skeletal growth
less damage to tooth tissue
less root resorption
less chance of decalcification
less effect on bone levels

Question 9

disadvantages of functional appliances

Answer 9

compliance- bulky, speech, soft tissue trauma
lack of detailed tooth movements
candidosis with removable appliances