Functional Appliances Flashcards
What are indications for functional appliances?
Good dental health Pre adolescent growth phase Mild- moderate skeletal discrepancy Increased over jet or over bite Proclined maxillary incisors Well aligned arches Co incident centre lines
What are contra indications for functional appliances?
Poor motivation/ cooperation Over 14 years of age Poor dental health Condylar disease Anterior open bite and other unfavourable facial growth
When are functional appliances used?
In mixed dentition to treat paediatric malocclusions
Growth modification
Growth guidance
Often to treat class 1&2 malocclusion
What are advantages of functional appliances?
Removable so aids good oh
May avoid XLA if good response to treatment
Accelerates skeletal growth
Reduces incidence of trauma
What are disadvantages to functional appliances
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Bulky appliances Requires good compliance Speech may be affected Soft tissue trauma Lack of detailed tooth movements
In removable functional appliances where is energy stored
Energy stored in muscles and ligaments
Where is energy stored in fixed functional appliances
Energy is stored in the appliance
What do bite planes allow for?
Discludes the mandible
Allows growth potential to be realised
What are some removable functional appliances?
Flat anterior bite plane
Twin blocks
Bio actor
Activator
What are examples of fixed functional appliances
Herbst
Jasper jumper
Twin blocks
What records are required for functional appliances
Study models
Rads- lateral cephs
Photos
What are the main functional appliance commandments
Wear constantly
Removed only for cleaning sport and musical instruments
Work best during eating and talking
What should be carried out at reviews for functional appliances
Check compliance with patient and parent
Measure over jet
Note molar relationship
Adjust clasps/ trim acrylic if necessary
What accounts for full success re. Functional appliances?
2mm overjet
What accounts for partial success
Less than 50%! Reduction in overjet
