Cephalometric l orthodontics MCQs for dental students

Cephalometric diagnosis l orthodontics MCQs for dental students

Cephalometric diagnosis MCQs in orthodontics

1. Cephalometrics was introduced by:

A. Paccini

B. William Conrad Roentgen

C. Boardbent and Hofrath

D. Leonard S Fishman

 

2. The distance between the x-ray source and the mid-sagittalplane of the patient in cephalometric radiography in

A. 160 cm

B. 160 mm

C. 152.4 mm

D. 152.4 cm

 

3. In cephalometrics, Point A is:

A. The deepest point in the midline between the alveolar crest of mandible and the mental process

B. The most anterior point of the bony chin in the median plane

C. The deepest point in the midline between the anterior nasal spine and alveolar crest between the two central incisors

D. The most inferior midline point on the mandibular symphysis

 

4. All of the following landmarks are present on mandible except:

A. Point B

B. Porion

C. Pogonion

D. Gonion

 

5. The median point of the anterior margin of the foramen magnum is:

A. Porion

B. Basion

C Bolton point

D. Orbitale

 

6. In cephalometrics, which of the following planes represents the anterior cranial base:

A. SN plane

B. Frankfort horizontal plane

C Basion-Nasion plane

D. Bolton's plane

 

7. In Down's cephalometric analysis the average value of angle of convexity is

A 28

B. 14

C. -10

D. 0

 

8. If in a person Y-axis is greater than normal then he is showing

A Vertical growth of mandible

B. Horizontal growth of mandible

C. No growth of mandible

D. Forward growth of mandible

 

9. In a case of class III malocclusion A-B plane angle is:

A Zero degrees

B. Negative

C. Positive

D. Remains constant whatever be the molar relationship

 

10. IF ANB angle of a person is 8, it is indicative of:

A. class I malocclusion

B. class II skeletal tendency

C class III skeletal tendency

D. Pseudo class III malocclusion

 

11. If SNA angle is 90° and SNB angle is 80°, it indicates that:

A. Maxilla is prognathic

B. Mandible is prognathic

C Maxilla is retrognathic

D. Mandible is retrognathic

 

12. The planes that form a diagnostic triangle of Tweed are all of the following except:

A. Frankfort horizontal plane

B. S.N plane

C Mandibular plane

D. Long axis of lower incisor

 

13. In Tweed analysis, the mean value of Frankfort mandibular incisor angle (FMIA) is:

A. 45

B. 25

C. 90

D. 65

 

14. Frankfort horizontal plane connects the:

A. Sella and nasion

B. Nasion and porion

C. Orbitale and porion

D. Orbitale and basion

 

15. Facial plane is drawn from

A Nasion to porion

B. Nasion to pogonion

C. Nasion to gonion

D. Nasion to menton

 

16. If the norm for the cephalometric angle SNA is 82°, a patient's reading of 90° for SNA most likely indicates:

A. Maxillary protrusion

B. The patient's ethnic background

C. Protrusive maxillary incisors

D. Dysplasia of the anterior cranial base

 

17. Which of the following is a MISMATCH

a) Bolton point: Highest point on the concavity behind occipital condyles

b) Gonion: Anterior point of the angle of the mandible

c) Orbital: Lower point on the left infraorbital margin

d) Porion: Highest point on the soft tissue (superior surface) of the external auditory meatus

 

18. The most anterior part of bony chin

a) Gonion

b) Pogonion

c) Menton

d) Gnathion

 

19. Which of the following landmarks present in the angle of mandible

a) Gnathion

b) Gonion

c) Pogonion

d) Porion

 

20. The point of intersection of dorsal contours of mandibular processes

a) Supramentale

b) Articulare

c) Condylion

d) Pterygomaxillary