Removable Appliances Flashcards
Name the components of a Removable Appliance
A- Active
R- Retention
A- Anchorage
B- Baseplate
What movement is created with a Removable appliance?
Tipping movements
What is a Removable Appliance used for?
•Simple movements
•tip teeth
• Maintain Space
•Overbite reduction
What are the active components of a Removable Appliance?
B- Bows
E- Elastics
S - Screws
S - Springs
What is the size of a active labial bow wire and what is it made out of?
Stainless Steel 0.5mm
What is a Roberts Retractor bow used to move?
Retracting proclined and spaced incisors
What is a Roberts Retractor bow used to move?
Retracting proclined and spaced incisors
What are Intra Oral Elastics used for
•Intrusion
•Extrusion
Eg.displaced canines
Advantages of Elastics in a RA
•Direct movement
•Discreet
Disadvantages of Elastics
•snapping
•pt complaince
What are screws made of?
Stainless Steel and a Central Cylinder
What do Screws achieve?
Anterior and posterior movements
What does an anterior labial screw achieve?
•Anterior labial movement
•proclines the anterior region
• Corrects anterior crossbites
What does a midline screw achieve?
•Expands the upper arch
•Corrects buccal crossbites
• Moves 2 groups at the same time
What does a 3D screw achieve?
•combination of Anterior and Midline Screw
•proclines ants and expands the arch
•two screws turned at seperate occassions
List retentive features of a RM
Cribs
Clasps
Bows
What are the wire measurements of a retentive component on a RA
SS 0.7mm
Where are cribs places?
Molars and premolars
Where are the cribs located on the tooth surface?
•1mm undercut
•lies at or just below ging margin
•mesial and distal
Name different types of clasps
Southend “m”
C clasp
Ball ended clasp
Plint clasp
Explain the Southend Clasp
0.7mm Stainless Steel
Retains the upper incisors
Explain the C clasp
Used for avoiding Occlusal interference
Undercut @ the ging margin of canines and molars
Explain the Ball ended clasp
0.7mm SS
U + L ants and premolars
Interproximal
Used on TB
But can create spacing
Explain a Plint clasp
On maxillary molar bands
Looks like @
Used with fixed appliances and headgear
Name the Anchorage components on a RA
Baseplate
- acrylic against the palatal vault
- colleting
- trasmits the force along the plate
Explain the baseplate
-self/coldcure
-houses the ither componants
-connects wires and cribs
-provides anchorage
Explain a Haydrake appliance
-Baseplate and wire behind upper incisors
-stops digit suckers
-retracts Incisors and corrects posterior crossbites
Explain a FABP
-Anterior propped open
-Allows molars to erupt
-reduces deep bites
Explain Posterior Bite Planes
-posterior surface covered and propped open
-stops occlusal interference
-helps to correct ant/post crossbites
