Ortho Lab Flashcards
Advantages of conventional retainers?
Removable
Durable
Encorporates all teeth
No occlusal surface coverage
Can be activated for minor changes
Disadvantages for conventional retainers?
Expensive
Palatal coverage (bulky)
Poor aesthetics - poor compliance
Advantages of thermoplastic retainers?
Good aesthetics
Easy to clean
Full tooth coverage
No palatal coverage
Cheap to make
Removable
Well tolerated
Disadvantages thermoplastic?
Easily worn/ lost/ broken
Distortion in hot water
Stains easily (brushing w toothpaste)
Can hold sugar on tooth surfaces
Gingival burning if inappropriate use (bleaching)
Advantages of bonded retainers?
Good aesthetics
Cheap
Compliance
Small and non intrusive
Disadvantages of bonded retainers?
Can fracture/ break easily
Long term maintenance
Only incorporates anterior teeth
Difficult to clean
What are the uses of transpalatal arches?
Anchorage
Rotation
Limited widening/ contraction
What do you use to attach molar bands and why?
GI cement
GI bonds to tooth and metal
What are the uses of quad helix?
Bilateral expansion
Asymmetrical expansion
Fan style expansion
Rotation of molars
Expansion in cleft palate
Modified to pro line incisors
Assist in habit breaking
