Development of dentition l Orthodontics MCQs for dental students

 

Development of dentition l Orthodontics MCQs (multiple choice question) for dental students 

MCQ on development of dentition in orthodontics 

1. The first evidence of dental lamina is seen at:

A. 4th month of intrauterine life

B. 3rd month of intrauterine

C 6th week of intrauterine life

D. 4th week of intrauterine life

2. The deciduous teeth are formed by direct proliferation of dental lamina whereas the succedaneous teeth develop from:

A. Distal extension of dental lamina

B. Lingual extension of dental lamina

C Direct proliferation of dental lamina

D. Buccal extension of dental lamina

3. The permanent molars develop from which part of dental lamina:

A. Distal extension of dental lamina

B. Lingual extension of dental lamina

C Direct proliferation of dental lamina

D. Buccal extension of dental lamina

4. The stages of development Of teeth can be described in the following order,

A. Cap stage-bell stage-bud stage

b. Bud stage-cap stage-bell stage

C Bud stage-bell stage-cap stage

D. Bell stage-cap stage-bud Stage

5. The teeth if present at the time of birth are called as•

A. Supernumerary teeth

B. Neonatal teeth

C Natal teeth

D. None Of the above

6. The sequence of eruption of deciduous teeth is.

A. A-B-C-D-E

B. A-C-D-B-E

C A-B-D-C-E

D. A-B-D-E-C

7. Absence of spaces in the primary dentition at the age of five years six months indicates that

A. The larger permanent teeth be easily accommodate in available spaces

B. The crowding of teeth may occur when the larger permanent teeth erupt

C the accommodation of larger permanent in the available space cannot be predicted

D. The larger permanent teeth erupt with absence of spaces between them but in proper alignment to each other

8. The physiologic raising of the bite or the bite in all of the following periods of eruption Of permanent except:

A. First molar

B. Second molar

C Third molar

D. Second premolar

9. The primate spaces are present between:

A. The upper deciduous lateral incisor and upper deciduous canines

B. The lower deciduous canine and the lower deciduous 1st molar.

C Both of the above

D. None of the above

10. The labiobuccal portion and the lingual portion of the gum pads are separated from each other by a groove called the:

A. gum pad and groove

B. Dental groove

C Lingual groove

D. Buccal groove

11. The eruption of all primary teeth is completed by:

A. 2 h t03 h years of age

B. 4 to 5 years of age

C 1 to 2 years of age

D. 5 to 6 years of age

12. The crypts of permanent maxillary incisors in relation to deciduous maxillary incisors are located:

A. Inferiorly and palatally

B. Superiorly and palatally

C Inferiorly and buccally

D. Superiorly and buccally

13. In class malocclusion due to mandibular prognathism. the mandibular incisors tend to erupt:

A. More vertically and are lingually tipped

B. More buccally and are buccaliy tipped

C More lingually but are buccally tipped

D. In proper alignment with normal overjet and overbite as in class I malocclusion

14. When the distal surface of upper deciduous second molar is mesial to the distal surface of lower deciduous second molar, the relationship between the distal surfaces of upper and lower deciduous second molars can be defined as:

A Flush terminal plane

B. Mesial step terminal plane

C Distal step terminal plane

D. None of the above

15. The incisal liability in the maxillary arch and the mandibular arch is respectively:

A. 5 mm and 7 mm

B. 7 mm and 5 mm

C 5 mm and 6 mm

D. 6 mm and 5 mm

16. The amount of "Leeway space of Nance" in each half of the maxillary arch is:

A. 1.7 mm

B. 3.4 mm

C 0.9 mm

D. 1.8 mm

17. A mother came with her 8 years old daughter to the dentist complaining about the space between the maxillary central incisors. The advice of the dentist to the mother and daughter should be:

A. That the girl needs an immediate orthodontic treatment

B. That the girl needs an extraction of both the maxillary central incisors as they may cause distal drifting of lateral incisors in later stage

C That the girl needs a reimplantation of both the maxillary central incisors

D. That the condition usually corrects by itself when canineserupt, as the condition is transient at this age and there is no need to worry

18. The mixed dentition period is the period between the eruption Of:

A. First permanent molar and the second permanent molar

B. First permanent molar and canine

C Canine and second permanent molar

D. Upper first permanent molar and lower first permanent molar

19.A boy of 10 years age had lost his maxillary right first deciduous molar due to caries. The further treatment by the dentist involves:

A. An immediate space maintainer.

B. An extraction of maxillary left first deciduous molar also

C A radiographic examination to know the amount of development and position of first premolar

D. A functional RPD

20. The usual sequence of eruption of permanent dentition in the maxillary arch is:

A 6-1-2-3-4-5-7

B. 1-2-3-4-5-6-7

C. 6-1-2-4-5-7-3

D. 6-1-2-4-3-5-7

21. In the mandibular arch the relationship of the eruption of permanent canine and premolars can be described as:

A. Canines erupting earlier than premolars

B. Premolars erupting earlier than canines

C No relationship between the eruption timings of canines and premolars

D. Canines and Premolars erupting at the same time

22. The root formation of the permanent teeth, after their eruption into the oral cavity, is completed by:

A. 1 to 2 years

B. 2 to 2 1/2 years

C. 3 to 4 years

D. 4 to 5 years

23- The characteristics of an infantile swallow is/are:

A. The jaws are not in contact with the tongue being placed between the upper and lower gum pads

B. The mandible is stabilized by the concentration of the muscles supplied by facial nerve and the interposed tongue

C. The swallow is guided and to a large extent controlled by sensory interchange between the lips and tongue

D. All of the above

24. Features of an ideal occlusion in the primary dentition involve all of the following except:

A. Flush terminal plane

B. Spacing between incisor teeth

C. Primate space present mesial to upper canine and distal to lower canine

D. Upper and lower incisors are in cross-bite

25. The tooth erupts into the oral cavity when the root formation

A. One-third completed

B. Two-thirds completed

C. Fully completed

D. There exists no co-relation between the amount of root formation and eruption of tooth into the oral cavity