COA COA Orthodontic Materials & Equipment 2

Question 1

Which bracket design features a built-in clip that holds the archwire without separate ligatures?

Accepted Answer

Self-ligating bracket

Answer

Traditional twin bracket

Answer

Ceramic bracket

Answer

Lingual bracket

Question 2

From what materials are modern orthodontic archwires most commonly fabricated?

Accepted Answer

Stainless steel or nickel-titanium

Answer

Gold alloy

Answer

Aluminum

Answer

Titanium dioxide

Question 3

What is the primary function of a Nance appliance?

Accepted Answer

To prevent upper molars from drifting mesially

Answer

To expand the palate transversely

Answer

To correct a posterior crossbite

Answer

To retract upper front teeth

Question 4

Which retainer type is fabricated from clear thermoplastic material that fits over the teeth?

Accepted Answer

Essix retainer

Answer

Hawley retainer

Answer

Fixed lingual retainer

Answer

Frankel appliance

Question 5

Which instrument is specifically designed to place and remove elastomeric o-tie ligatures on brackets?

Accepted Answer

Ligature director/tucker

Answer

Hemostat

Answer

Band seater

Answer

Scaler

Question 6

Which instrument is used to trim the excess distal end of an archwire after engagement?

Accepted Answer

Distal end cutter

Answer

Band scissors

Answer

Wire-bending pliers

Answer

Torquing pliers