Orthodontics Flashcards
At what temperatures do gold solders melt?
1400* F
At what temperature do silver solders melt?
1150* F
What three parts make up a removable orthodontic appliance?
Effecting mechanism, anchorage and retention.
What are some effecting mechanisms that can be added to removable orthodontic appliances?
Springs, booties & elastics, screws.
An appliance that has anterior-posterior activation is a:
Herbst appliance
The overall height of properly trimmed models should be:
70mm
A fixed Iingual arch appliance which is bonded or banded and soldered from cuspid to cuspid is known as a:
3x3
A modified spring retainer is used to:
Correct posterior alignment
The bionator is a modification of which appliance?
Activator
When trimming the backs of study models which should be trimmed first?
The upper
The standard diameter of round wire used to fabricate a labial bow for most retainers is:
0.40 in
An acrylic and wire appliance used primarily on mandibular incisors to correct rotations and labiolingual malpositions and is capable of performing all movements at one time is a:
Modified spring retainer.
An activator functional appliance is used to treat this type of malocclusion classification.
Class II
