What does a removable appliance do to teeth?
What are the potential problems if you just tip teeth?
Describe removables in the lower arch?
Less undercut for retention
Less buccal sulcus for springs
Tongue severely limits lingual space for springs
What are the limitations resulting from a Tipping action?
Mesio-distal in the buccal segments
Labio-lingual in Class II
Labio-lingual in Class III
Mesio-distal in labial segments
What are the limitations of removables?
Multiple tooth movements
What are the current uses of removable appliances?
Tooth over bite
Other simple tooth movements
What are the advantages of removable retainers?
ALL the teeth can be retained
Partial withdrawal is possible
Less dental health hazard
Missing teeth can be replaced
Responsibility of the patient
What are the disadvantages of removable retainers?
Vertical tooth position
Need to be worn
If you have a fixed upper retainer, what else should you have?
A removable one too
What are the favourable features of a removable appliance for treating a tooth over the bite?
One or two teeth only
Upright upper incisor
A mandibular displacement
What are the advantages of the acrylic base plate?
Can provide anterior and posterior bite planes
Can accommodate a screw
Give some anchorage from the palate
What are screws used for?
Unilateral or bilateral distal movement
Anterior crossbite correction
What is being shown here?
Anchorage from the vault of the palate
What are functional appliances?
e.g. twin blocks Used to correct Class II malocclusion
How can you tell if a patient is wearing an appliance?
Wear facets on acrylic
Confident removal and insertion