Development of Dentition _ Orthodontic MCQs (Dental Pulse)

Development of Dentition _ Orthodontic MCQs (Dental Pulse)

1. In children, median diastema between maxillary permanent centrals closes with the eruption of
a) Maxillary permanent first premolar
b) Maxillary permanent central incisor
c) Maxillary permanent canines
d) Maxillary permanent second molars

2. The average “Leeway space” available in each half of the maxilla is approximately
a) 0.9 mm
b) 2.9 mm
c) 4.0 mm
d) 6.9 mm

3. If a flush terminal plane is present in the deciduous dentition then the molars will erupt
a) Initially in class I occlusion
b) Initially in class II occlusion
c) Initially in class III occlusion
d) End to end

4. The primate spaces are related to the position of the diastema that are
a) Distal to the maxillary primary canines and mesial to the mandibular primary canines
b) Mesial to the maxillary primary canines and distal to the mandibular primary canines
c) Distal to both the maxillary and mandibular primary canines
d) Mesial to both maxillary and mandibular primary canines

5. Which of the following can be predicted from a flush terminal plane of primary dentition
a) Always results in Class I molar relation
b) Always results in Class II molar relation
c) Always results in Class III molar relation
d) Final molar relation cannot be predicted definitely

6. The “Ugly duckling” stage of the transitional dentition is characterized by all of the following except
a) Deep overbite
b) Distoangular axial inclination of the maxillary incisors
c) Mandibular lateral incisors erupting lingual to the mandibular central incisors
d) Possible overjet

7. Late mesial shift is due to
a) Closure of primate spaces
b) Eruption of first permanent molars
c) Related to end on – molar relation
d) Closure of leeway space

8. With respect to their permanent successors, the sum of the mesio-distal diameters of the first and second deciduous molars is generally
a) Less
b) Greater
c) The Same
d) Not Related

9. Primate spaces are between:
a) B and C
b) C and D
c) A and C
d) Options A and B

10. Spacing seen between the maxillary deciduous teeth in a 6-year-old child indicates:
a) Good growth
b) Class III tendency
c) Class II tendency
d) Presence of mesiodens

11. Intercanine width in maxilla is increased with
a) Eruption of lateral incisors
b) Eruption of permanent canines
c) Eruption premolars
d) Eruption of peg laterals

12. Transitional phase of dentition is:
a) During eruption of permanent and exfoliation of deciduous teeth
b) After all permanent teeth have erupted
c) Phase during correction of malocclusion
d) None of the above

13. Ugly duckling stage affects:
a) Maxillary anterior teeth
b) Mandibular anterior teeth
c) Both maxillary and mandibular teeth
d) Cause decrease in vertical height

14. Which terminal plane is favorable for E/E to have class I molar relationship?
a) Flush terminal plane
b) Mesial step
c) Distal step
d) None of the above

15. Good contacts in primary teeth with lack of spacing predicts:
a) Normal occlusion in permanent teeth
b) Crowding in permanent teeth
c) Anterior cross bite
d) Spaced permanent dentition

16. After mixed dentition stage the arch length from first molar to first molar usually:
a) Remains same
b) Increases
c) Decreases
d) Doubles

17. Which of the following is a self-correcting anomaly:
a) Ugly duckling stage
b) Deep bite
c) Retrusion
d) Protrusion

18. Leeway space of Nance is utilized in:
a) Early mesial shift of first permanent molars
b) Incisal liability
c) Late mesial shift of first permanent molars
d) Secondary spacing of first permanent molars

19. The ugly duckling stage is seen at the age of
a) 6 – 7 years
b) 9 – 10 years
c) 10 – 12 years
d) 12 – 14 years

20. Spacing in anterior teeth in deciduous dentition
a) Common and desirable
b) Uncommon and undesirable
c) Common and undesirable
d) Uncommon

21. A 9-year-old child came to the dental clinic with spacing in anterior teeth. The line of treatment is
a) Fixed appliance
b) Removable appliance
c) Inclined plane
d) No treatment, observation of patient

22. Difference in width of permanent and primary incisors is
a) Incisal guidance
b) Incisal inclination
c) Overjet
d) Incisal liability

23. Leeway space is
a) 1.7 mm and greater in mandible
b) 1.7 mm and least in mandible
c) 3.4 mm and greater in mandible
d) 3.4 mm and least in mandible

24. Into how many segments the infant’s gum pad is divided
a) Two in each quadrant
b) Three in each quadrant
c) Two in each jaw
d) Five in each quadrant

25. Spaces in deciduous dentition
a) Physiological
b) Pathological
c) Incisal liability
d) None of above

26. An 8-year-old child has 1st molar cusp-to-cusp relation. The treatment is
a) Fixed appliance
b) Removable appliance
c) Continuous recall and observe
d) None of above

27. In primary dentition the anatomic structure used to determine the molar relationship
a) Mesio-buccal cusp of primary 2nd molar
b) Distal plane of primary 1st molar
c) Mesial surface of primary 1st molar
d) Distal plane of primary 2nd molar

28. Grooves, which are present in gum pads between the canine and the 1st molars and relate the upper and lower gum pads are called as
a) Gingival groove
b) Dental groove
c) Vestibular sulcus
d) Lateral sulcus

29. The average leeway space available in each half of mandible is
a) 3.8 mm
b) 1.7 mm
c) 2.4 mm
d) 0.9 mm

30. Mesial step formation in deciduous dentition is indication of future
a) Class II malocclusion
b) Class III malocclusion
c) Anterior crowding
d) Anterior cross bite

31. In a newborn child we generally see
a) Maxillary protrusion
b) Maxillary retrusion
c) Mandibular protrusion
d) Mandibular retrusion

32. Which of the following is used in mixed dentition classification of malocclusion
a) Angle’s classification
b) Simon’s orbital plane
c) Flush terminal plane
d) All of the above

33. Which of the following is correct
a) Primary teeth begin to erupt at the age of 6 months
b) The eruption of all primary teeth is completed by 2.5 – 3.5 yrs
c) The sequence of eruption of deciduous dentition is A-B-D-C-E
d) All of the above

34. Which of the following is correct
a) A deep bite may be seen in initial stages of development
b) The order of eruption of maxillary permanent teeth is 6-1-2-4-3-5-7
c) The order of eruption of mandibular permanent teeth is 6-1-2-3-4-5-7
d) All of the above

35. Most of leeway space is contributed by
a) Second primary molar
b) Primary canine
c) First primary molar
d) None of above

36. Eruption of the permanent maxillary second molar prior to the maxillary second premolar is:
a) Normal and desirable
b) Abnormal and undesirable
c) Abnormal and desirable
d) Normal and undesirable

37. According to Wolff’s law:
a) Human teeth drift mesially as interproximal wear occurs
b) Pressure causes bone resorption
c) The optimal level of force for moving teeth is 10 – 200 grams
d) Bone trabeculae line up in response to mechanical stresses

38. The commonest teeth involved in transposition are:
a) Maxillary central incisor and lateral incisor
b) Maxillary canine and first premolar
c) Maxillary 1st premolar and 2nd premolar
d) Maxillary canine and lateral incisor

39. Incisal liability on an average in the maxillary arch is:
a) 3 mm
b) 6 mm
c) 4 mm
d) 7.5 mm

40. Gum pads are divided into following segments:
a) 3 in each quadrant
b) 2 in each jaw
c) 5 in each quadrant
d) 2 in each quadrant

41. Ugly duckling stage of dentition in children is corrected by eruption of which tooth?
a) Central incisor
b) Lateral incisor
c) Canine
d) Second molar

42. After 6 years of age, the lengthening of mandible occurs mainly
a) At the symphysis
b) Between the canines
c) Distal to first permanent molar
d) Along the lower border

43. Ugly duckling stage coincides with transitional phase
a) 1st transitional phase
b) Inter-transitional
c) 2nd transitional
d) All of the above

44. Which of the following is NOT a transient / self-correcting malocclusion?
a) Spaced primary dentition
b) Deep overbite in primary dentition
c) Flush terminal planes in primary dentition
d) Anterior crossbite in primary dentition

45. Safety valve mechanism is:
a) The anteroposterior increment in the maxilla at 14 yrs
b) Increase in the mandibular inter-canine width at 14 yrs
c) Increase in the mandibular height at 12 yrs
d) Increase in the maxillary inter-canine width at 12 yrs

46. Midline diastema present in children is self correcting if diastema is not more than
a) 2.0 mm
b) 1.5 mm
c) 1.0 mm
d) 0.5 mm

47. At which stage of Nolla’s, the tooth starts erupting:
a) Stage 5
b) Stage 6
c) Stage 7
d) Stage 8

48. Leeway space is due to:
a) Space difference between deciduous canine and molar and their succedaneous permanent teeth
b) Space difference between deciduous incisors and their succedaneous permanent teeth
c) Difference between deciduous and permanent maxillary canine
d) None