Prolonged thumbsucking directly results in all of the following except 1) Deep over bite 2) Proclincation upper central incisors 3) Rotation of upper laterals 4) Construction of maxills
OrthodonticsAnswer: 1
Which of the following are true of chin cap 1) It has to exert 2-3 pounds if worn for 10-12 hours 2) It has to exert 1-2 pounds if worn for 16-18 hours 3) It has to be worn for 24 hours/day to correct severe prognathic mandible 4) All of the above
OrthodonticsAnswer: 4
Advantage of using extraoral anchorage 1) Forces as great as 1200 g can be applied 2) Provides reciprocal action on opposite arch 3) Permits posterior movement of teeth in one arch without effecting teeth of opposite arch 4) All of the above
OrthodonticsAnswer: 4
Cleidocranial dystosis is characterised by 1) Premature exfoliation of teeth 2) Class-II skeletal relation 3) High incidence of caries 4) Multiple unerupted supernumerary teeth
OrthodonticsAnswer: 4
During eruption of lower lateral incisors, left primary canine is prematurely exfoliated. Line of treatment 1) No treatment, periodic observation 2) Extraction of right primary canine to prevent midline shift 3) Move the left permanent lateral incisors towards milline 4) Move the right permanent lateral incisors towards milline
OrthodonticsAnswer: 2
In lateral cephalometrics the distance at which film is placed from mid sagittal plane 1) 10 cm 2) 12 cm 3) 15 cm 4) 18 cm
OrthodonticsAnswer: 4
A 10-year-old child with primary molars in various stages of exfoliation has a slight crowding in the lower anterior. The clinician should 1) Observe him after 1 year 2) Obtain study casts and perform arch-length analysis 3) Observe him after 6 months 4) Delay the treatment until all permanent teeth erupt
OrthodonticsAnswer: 2
If tooth is to be translated, appliance should exert 1) Continuous forces 2) Moment of forces 3) Intermittent forces 4) Interrupted forces