Functional appliances Flashcards
what are functional appliances used for?
growth modification
growth guidance
functional growth guidance
functional appliance therapy
what class malocclusion can they fix?
class 2/3
what are indications a pt must have to be given an appliance?
good oh motivated increased OJ/OB well aligned arches co incident centre lines pre adolescent growth mild/mod skeletal discrepancy proclined max incisors
what are contra indications a pt may have that would stop them having an appliance?
poor motivation over 14yrs poor oh condylar disease - rheumatoid unfavourable facial growth
what are advantages of functional appliances?
removable - good for oh
avoid XLA
accelerates skeletal growth
reduces trauma incidence
what are disadvantages of functional appliances?
bulky appliance compliance affects speech soft tissue trauma lack of detailed tooth movements
where do the forces that move the teeth come from in a removable functional appliance?
energy stored in muscles and ligaments
forces applied to soft tissue, bone and teeth
where do the forces that move the teeth come from in a fixed functional appliance?
energy stored in appliance
forces applied to teeth, soft tissue and bone
what are types of removable appliance?
flat ant bite plane
twin blocks
bionator
activator
what are types of fixed appliance?
herbest
jasper jumper
twin blocks
what records are needed to be taken for ortho work?
photos
xrays
study models
what requirements do the lab need to make an appliance?
impressions
functional ortho record
prescription
when do these appliances work best?
talking and eating
if full success occurs what is the overjet?
if partial success occurs what is the overjet?
2mm
50% of initial value
what is the method of teeth movement?
skeletal - additional growth, mediated via oral muscles
dental - tooth movement
