Model analysis l orthodontics MCQs for dental students 

    

 Model analysis and orthodontics diagnosis MCQ

1.Mixed dentition analysis is/are:

A. Huckaba's analysis

B.Tanaka and Johnston analysis

C. Both of the above

D. None of the above

 

2.  If in Ashley Howe's Analysis the premolar basal arch width percentage is 37% or less, it indicates:

A. That the case can possibly be treated without extracting any teeth

B. A need for extraction

C. A borderline case

D. That the arch expansion is possible

 

3. Ponts analysis is used to determine:

A. The need for arch expansion

B. The amount of expansion needed in the molar region

C. The amount of expansion needed in the premolar region

D. All of the above

 

4. Ponts analysis and Linder Harth index are similar to each other  except for one value which is different, that value is:

A. Measured premolar value

B. Measured molar value

C. Calculated molar value

D. Calculated premolar value

 

5. The Carey's analysis on the upper cast is termed as:

A. Upper cast analysis

B. Maxillary cast analysis.

C. Arch length analysis

D. Arch perimeter analysis

 

6. If in carey’s analysis the discrepancy between arch length and tooth material is 4.5 mm, it indicates:

A. No need of extraction

B. Extraction of first premolar

C. Extraction of second premolars

D. Extraction of first molar

 

7. The Bolton's analysis helps in determining:

A. Whether the dental arch is narrow or is normal

B. The need for lateral arch expansion

C. Disproportion in size between maxillary and mandibular teeth

D. How much expansion is possible at the premolar and molar region

8. In Bolton's analysis if the overall ratio of sum of mandibular 12 and sum of maxillary 12 is less than 91.3 it indicates.

A. Maxillary prognathism

B. Mandibular prognathism

C. Maxillary tooth material excess

D. Mandibular tooth material excess

 

9. In Bolton's analysis, the anterior ratio indicates

A. Equal to 77.2%

B. Less than 77.2%

C. More than 77.2%

D. More than 91.3%

 

10. The purpose of a mixed dentition analysis is to evaluate the amount of space available in the arch for the erupting:

A. Deciduous canines only

B. Permanent canines only

C. Permanent premolars only

D. Permanent canines and premolars

 

11.In radiographic method of mixed dentition analysis the Y, in the formula Y1= (X1 x Y2)/X2 denotes:

A. Width of unerupted tooth whose measurement is to be determined

B. Width of unerupted tooth on the radiograph

C. Width of a tooth that has erupted, measured on the cast

D. Width of a tooth that has erupted, measured on the radiograph

 

12.Moyer's mixed dentition analysis predicts the:

A. Combined mesio-distal width of 3,4 and 5based on the sum of the widths of the four lower permanent incisors

B. Combined mesio-distal width of 4 and 5, based on the sum of the widths of the four lower permanent incisors

C. Combined mesio-distal width of3, 4 and 5 based on the sum of the widths of the four upper permanent incisors

D. Combined buccal-lingual width of 3,4 and 5 based on the sum of the widths of the four lower permanent incisors

13. Which of the following analysis can be done only in lower arch:

A. Moyer's mixed dentition analysis

B. Peck and peck index

C. Arch perimeter analysis

D. Total space analysis

14. To determine whether to use a space maintainer or a space regainer in an arch where there has been premature primary molar loss, it is necessary to:

A. Analyze a cephalogram

B. Consult with an orthodontist

C. Perform a mixed dentition and study model analysis

D. Measure tooth and space sizes on intraoral radiographs

 

15. Study models are used

a) as references in orthodontic cases

b) to show shape,size and position of teeth

c) as an aid in treatment planning

d) All of the above

 

16. Gnathostatic models

a) Upper base is parallel to ground

b) Upper base is parallel to FH plane

c) Upper base is parallel to lower base

d) Lower base is parallel to FH plane

 

17. Arch perimeter is measured with

a) Cephalogram

b) Brass wire

c) Vernier calipers

d) Occlusal radiograph

18. If arch length space discrepancy is more than 10 mm, it indicates, for correction of crowding

a) Definite extraction of some permanent teeth

b) Myofunctional therapy should be carried

c) Only fixed appliance therapy is indicated

d) Expansion of the arch should be carried out

 

19. In space discrepancy according to Carey’s arch perimeter analysis is 4 mm,your inference is

a) Proximal stripping            

b) Expansion of the arch

c) Extraction of 1st premolar

d)Extraction of 2nd premolar

 

20. Ashley-Howe model analysis is used to predict

a) tooth material excess

b) maxillo-mandibular relationships

c) basal bone-transverse relationship

d) growth prediction