Functional appliances Flashcards
Define functional applainces
loose, usually removeable IO devices which alter the muscle forces against the teeth
How do functional appliances work?
alter neuro-muscular action to affect bony growth and occlusal development
posture mandibles forwards in growing patients
which dentition are functional appliances normally used and why
mixed
to treat paediatric malocclusions
In which techniques are functional appliances used?
Growth modification
Growth guidance
Functional growth guidance
Functional appliance therapy
define growth modification
taking advantage of a childs growing years to guide proper jawbone formation using ortho applainces
can correct existing maloccusions or prevent them from occuring
In which types of malocclusion would functional appliances be used?
Class II
Class III
name 8 indications for a functional appliance
good dental health motivated pt pre-adolescent growth phase mild or moderate skeletal discrepancy Increased OB/OJ proclined maxillary central incisors well aligned arches co-incident centre lines
name contraindications for functional appliances
poor motivation >14 year poor dental health condylar disease unfavourable facial growth
Give an example of unfavourable facial growth which don’t respond to functional appliances
increased vertical facial proportions
especially anterior open bite
Give 4 advantages of functional appliances
removable- good for dental health
avoid extractions- if good response to treatment
reduces incidence of trauma
accelerates skeletal growth
give 5 disadvantages of functional appliances
bulky affects speech need pt compliance lack of detailed tooth movements ST trauma
what are the 2 types of functional appliances and where is the energy stored in each type
fixed- energy stored in appliance
removable - energy stored in muscles and ligaments
Where are the forces applied to in the 2 types of functional appliances?
ST, teeth and bone
Name 6 types of removable functional appliances
flat anterior bite plane bionator activator twin block fraenkel teuscher
name 3 types of fixed functional appliances
herbst
jasper jumper
twin block
