NBDE Part II Orthodontics Questions With Answer Key

Question 11: Which orthodontic appliance can cause extrusion of maxillary first molar resulting in an open bite?

A. Reverse pull headgear

B. Cervical pull headgear

C. High pull headgear

D. Straight pull headgear

Answer & Explanation

Answer: [B]


Question 12: Which of the following myofunctional orthodontic appliance is an example of tissue borne appliance?

A. Bionatar

B. Herbst appliance

C. Twin block appliance

D. Frankel appliance

Answer & Explanation

Answer: [D]


Question 13: Which treatment modality is used for the treatment of ectopically erupted permanent maxillary first molar?

A. A brass wire is placed between deciduous second molar and permanent first molar

B. Disking the distal surface of deciduous first molar

C. Extraction of deciduous second molar

D. None of the above

Answer & Explanation

Answer: [A]


Question 14: Which type of occlusion is least common?

A. Normal occlusion

B. Class I malocclusion

C. Class II malocclusion

D.Class III malocclusion

Answer & Explanation

Answer: [D]


Question 15: Which teeth are used to perform Moyer’s mixed dentition analysis?

A. Maxillary first molar

B. Maxillary incisor

C. Mandibular first molar

D.Mandibular incisor

Answer & Explanation

Answer: [D]

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