REMOVABLE AND FIXED ORTHODONTIC APPLIANCES

 

1) One of the following is not a myofunctional appliance:
a) Activator.
b) Frankel.
c) Oral screen.
d) Light wire.

2) A normal removable appliance in treatment of thumb sucking habit is:
a) Hawley`s appliance.
b) Activator.
c) Boley`s appliance.
d) Cribb`s appliance.

3) The following is not a component of fixed appliance:
a) Bands.
b) Brackets.
c) Open hellicle.
d) Adam`s clasp.

4) Activator or monobloc is:
a) A perfectly setting acrylic appliance for maxilla and mandible.
b) An acrylic appliance with occipital or cervical anchorage.
c) A loose acrylic plate that imposes agiven postion on the mandible.
d) Non of the above.

5) A bite plane anteriorly should be:
a) So that posterior teeth kept 2mm apart.
b) The posterior teeth are 5.5 mm apart.
c) Posterior teeth are 5-7 mm apart.
d) No specific clearance can be achieved.

6) Bodily movement of the incisors can be done by:
a) Hawley`s retainer.
b) Crozat`s appliance.
c) Dens hold appliance.
d) Fixed edgewise appliance.

7) Expansion screws produce an expansion:
a) 2 mm per turn.
b) About 1 mm per turn.
c) 1 mm expansion per turn.
d) 0.25 mm per quarter turn.

8) The chin cap should be worn a minimal of:
a) 6-8 hours a day.
b) 8-10 hours a day.
c) 12-14hours a day.
d) Non of the above.

9) Stainless steel wires used in orthodontic:
a) Are work hardened.
b) Need heat annealing.
c) Should be heated to red hot.
d) Non of these are true.

10) The tongue blade is the simple device used for:
a) Lip sucking.
b) Tongue thrusting.
c) Finger sucking.
d) Incisors cross bite.
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