Free Orthodontic Dental MCQ

Postgraduate Orthodontic MCQ

1) Which of the following best method for tipping of maxillary and mandibular anterior teeth

a) finger spring.
b) Z- spring.
c) Both of them.
d) non of the above.

2) Which of the types of headgear produces a distal and upward on the maxillary teeth and maxilla ?

a) straight – pull headgear.
b) reverse – pull headgear.
c) cervical – pull headgear.
d) high – pull headgear.

3) Which of the following is usually used as a etching agent before direct bonding of orthodontic bracket?

a) 10-15% unbuffered phosphoric acid.
b) 35-50% unbuffered phosphoric acid.
c) 75-85% unbuffered phosphoric acid.
d) 100% unbuffered phosphoric acid.

4) Orthodontic can

a) cause irritation to gingival.
b) act as a plaque harbors.
c) make proper oral hygiene difficult to perform.
d) all of the above.

5) Which of the following determines the effect of a face bow headgear on the molars to which attached

a) the relation of the outer bow to center of resistance of the tooth.
b) the direction of pull of head strap.
c) the length and the position of the outer bow in relation to the inner bow.
d) all of the above.

6) Which of the following is the most used reainer in orthodontic

a) tooth positioner.
b) hawley retainer.
c) functional retainer.
d) anterior spring retainer.

7) Which of the following alloys used for arch wires in orthodontics

a) stainless steel.
b) chromium - chobalt.
c) titanium.
d) all of the above.

8) All of the following are fixed orthodontic appliance except

a) lingual archwire.
b) fixed space maintainers.
c) palatal – separating devices.
d) lip bumpers.

9) A seven – year – old child with an other wise good occlusion has a lingually locked maxillary permanent incisor .there is sufficient room for tooth . in order to treat the condition properly the dentist what should do ?

a) wait all the permanent are erupt.
b) surgically reposition the central incisor.
c) correct the condition immediately with simple appliance.
d) non of the above.

10) Which appliance listed below is properly that most widely used today by orthodontics

a) the universal appliance.
b) the edgewise appliance.
c) all of the above.
d) neither of above.

free count

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