Orthodontic I Test

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Orthodontic I Test

1 / 60

Which among the following are vertical planes? I. facial II. Y axis III. Axis of 1 IV. palatal planes

a. II and IV

b. II, III and IV

c. I, II, III and IV

d. III and IV

e. I, II and III

2 / 60

Which of the following are normal signs of primary dentition? I. ovoid arch form II. deep overjet and overbite III. straight terminal plane IV. primate spaces

a. I, II and IV

b. I, III and IV

c. I, II, III and IV

d. II, III and IV

3 / 60

At what stage in Nolla’s classification does a permanent tooth start to erupt?

a. Stage 8

b. Stage 4

c. Stage 5

d. Stage 7

e. Stage 6

4 / 60

Eruptive tooth movement begins when?

a. Nolla’s stage 5

b. Nolla’s stage 8

c. Root begins to form

d. None of the above.

e. crypt is present

5 / 60

The halves of the mandible fused at age?

a. one year of age

b. two years

c. one month postnatally

d. birth

6 / 60

Bone ossification can be detected with the use of:?

a. Biostatistics

b. Hand and wrist

c. Electromyographic exam

d. BMR

e. None of the above

7 / 60

The sequence of completion of facial growth by planes of space is?

a. depth, width, height

b. width, depth, height

c. width, height, depth

d. depth, height, width

e. height, depth, width

8 / 60

Incisor liability:?

a. Difference between deciduous and permanent incisors, the result of which is negative

b. Difference between interdental and primate space

c. Difference between primate and leeway space

d. difference between deciduous and permanent incisors , the result of which is positive.

9 / 60

The anchorage distributed to both upper and lower jaws is?

a. single

b. intramaxillary

c. compound

d. intermaxillary

10 / 60

Which among the following are horizontal planes? I. FH plane II. SN plane III. axis of 1 IV. occlusal plane

a. I, II and IV

b. II, III and IV

c. I, II and III

d. I, III and IV

e. I, II , III and IV

11 / 60

It is an excellent aid in appraising facial balance, facial type and harmony of external feature.?

a. photos

b. none of the above.

c. cephalometrics

d. radiograph

e. study cats

12 / 60

The anchorage in which the units situated in one jaw is used to effect tooth movement in the other jaw.?

a. intraoral

b. intramaxillary

c. intermaxillary

d. extraoral

13 / 60

Orthodontic treatment options:

a. 3 options

b. 5 options

c. 6 options

d. 4 options

14 / 60

Which one is the right answer for the canine classification ?

a. All are related

b. Canine ½ unit class II

c. Canine class II

d. Canine class III

e. Canine class I

15 / 60

The deepest point on the concavity of the mandibular profile between the point of chin and the alveolar crest is ?

a. All unrelated

b. N Point

c. A Point

d. S Point

e. B Point

16 / 60

What is the flush terminal plane ?

a. All unrelated

b. When the distal surface of upper and lower first deciduous molars are in the line each other

c. When the distal surface of upper and lower first permanent molars are in the line each other

d. When the distal surface of upper and lower second permanent molars are in the line each other

e. When the distal surface of upper and lower second deciduous molars are in the line each other

17 / 60

The function of Z spring to apply the force to move the tooth ?

a. To palatally

b. All are related

c. To mesially

d. To labially

e. To disally

18 / 60

The deepest point on the maxillary profile between anterior nasal spine and the alveolar crest is ?

a. Ba Point

b. All unrelated

c. A Point

d. B Point

e. S Point

19 / 60

What type of x-ray could check for notch in interdental bone between #11 and #21 ?

a. All unrelated

b. All are related

c. Panoramic

d. Bite wing

e. Maxillary anterior occlusal or Periapical view

20 / 60

The factors that causes of overjet increase ?

a. All are related

b. Dental factor

c. Soft tissues

d. Skeletal factor

e. Habits

21 / 60

Which size of wire for buccal canine retractor ?

a. 0.6 mm

b. All unrelated

c. 0.9 mm

d. 0.8 mm

e. 0.7 mm

22 / 60

The ideally of the lip line at rest position the lower lip cover between?

a. ⅓ or ½ of the labial surface of the upper central incisor

b. All unrelated

c. ¾ of the labial surface of the upper central incisor

d. ⅔ of the labial surface of the upper central incisor

e. ⅝ of the labial surface of the upper central incisor

23 / 60

What method that can effect for the overbite reduction when patient wear removable appliance?

a. Posterior bite plane

b. All are related

c. Head gear

d. Anterior bite plane

e. Molar capping

24 / 60

What cephalometric planes tracing were found ?

a. Maxillary plane

b. Frankfort plane

c. All are related

d. Mandibular plane

e. Functional occlusal plane

25 / 60

The convexity of the face with profile view when the ?

a. Skeletal is class I base

b. Unrelated

c. Skeletal discrepancy

d. Skeletal is class III base

e. Skeletal is class II base

26 / 60

Why the removable appliance was used in mixed with fixed appliance?

a. Easy to improve oral hygiene in the mouth

b. Upper or lower can not treated with fixed appliance

c. All are related

d. May need to reinforce of anchorage

e. May loose the brases in the upper or lower ach

27 / 60

The mandibular plane is constructed by joining which of the following landmarks ?

a. Porion to Menton

b. Gonion to Menton

c. Gonion to Pogonion

d. Gonion to B Point

e. Pogonion to Menton

28 / 60

How many kind of occlusion:

a. 5

b. 3

c. 4

d. 2

29 / 60

Anterior teeth are most likely to be fractured in children with which of the following mixed dentition malocclusions?

a. Class I

b. Class II div 2

c. Class III

d. There is no relation

e. Class II div 1

30 / 60

What types of springs for removable appliances ?

a. Buccal canine retractor

b. All unrelated

c. T spring

d. All are related

e. Z spring

31 / 60

Which size of wire for T spring ?

a. 0.3 mm

b. 0.7 mm

c. 0.5 mm

d. All unrelated

e. 0.9 mm

32 / 60

The Norms of the Lower central incisor to Mandibular plane (L1-MP ) ?

a. 96 ± 3 degree

b. 96 ± 5 degree

c. 96 ± 2 degree

d. 96 ± 4 degree

e. 96 ± 1 degree

33 / 60

Midline coincidence mean ?

a. Unrelated

b. Upper and Lower midline in the middle

c. Upper midline shift

d. Lower midline shift

e. Upper and Lower midline shift

34 / 60

Which component that can allow differential eruption of teeth ?

a. All unrelated

b. Working bite

c. Bite-plane

d. Shields

e. All are related

35 / 60

The method to measure the arch we can divided it into ?

a. One segment

b. Five segments

c. Three segments

d. Four segments

e. Two segments

36 / 60

The skeletal Class III was described when ?

a. ANB : ˂ 4 degrees

b. ANB : ˂ 3 degrees

c. ANB : ˂ 2 degrees

d. ANB : ˂ 1 degrees

e. All unrelated

37 / 60

Which size of wire for Z spring ?

a. 0.7 mm

b. 0.9 mm

c. All are related

d. All unrelated

e. 0.5 mm

38 / 60

What functions of the screws expansion ?

a. To move one or a group of teeth distally

b. To move one or a group of teeth labially

c. Expand upper arch transversely

d. All are related

e. All unrelated

39 / 60

The mandibular landmark were known as below: ?

a. Pogonion, Nasion, Gonion, Point B, Ii

b. Pogonion, Menton, Gonion, Point B, Ii

c. All unrelated

d. Pogonion, Menton, Porion, Point B, Ii

e. Pogonion, Basion, Gonion, Point B, Ii

40 / 60

The maxillary landmark were known as:?

a. Incisor superius

b. All are related

c. Anterior nasal spine

d. Posterior nasal spine

e. Point A

41 / 60

Functional occlusal plane ( FOP ) was represented by a line that passes through the occlusion of the ?

a. Distal cusps of the most anterior permanent molar and halfway between the tips of the upper and lower central incisors.

b. Mesial cusps of the permanent molar and halfway between the tips of the upper and lower central incisors.

c. Mesial cusps of the most anterior permanent molar and halfway between the tips of the upper and lower central incisors

d. All unrelated

e. Distal cusps of the permanent molar and halfway between the tips of the upper and lower central incisors.

42 / 60

The most inferior point on the marginal of the orbit ?

a. Po Point

b. Or Point

c. A Point

d. All unrelated

e. B Point

43 / 60

Flush terminal plane is at:

a. Distal of Es

b. Mesial of Es

c. Labial of Es

d. Lingual of Es

44 / 60

The factor that effect to the choice for teeth extraction when the space is required as follows ?

a. anchorage requirements is enough

b. Teeth are well alignment with spacing

c. Teeth are poor prognosis

d. All are related

e. Teeth are well alignment without spacing

45 / 60

The main reasons for doing orthodontic treatment:

a. 4

b. 3

c. 6

d. 5

46 / 60

What function for palatal finger spring ?

a. All unrelated

b. To move a tooth to buccally

c. To move a tooth to mesially or distally

d. To move a tooth to buccally or palatally

e. To move a tooth to palatally

47 / 60

The factor effect to the choice for teeth extraction when the space is required as follows ?

a. Teeth are well alignment with spacing

b. All are related

c. Teeth are well alignment without spacing

d. anchorage requirements is enough

e. Teeth are poor prognosis

48 / 60

The last primary tooth to be replaced by a permanent tooth is usually the ?

a. Maxillary canine

b. Mandibular canine

c. Mandibular second molar

d. Maxillary second molar

e. Maxillary first molar

49 / 60

Total arch length minus total teeth width when the result is a negative value, it’s indicates ?

a. The presence of alignment

b. The presence of crowding

c. The severe of malocclusion

d. The presence of spacing

e. All unrelated

50 / 60

Which plane is paralleled to Horizontal plane ?

a. Mandibular plane

b. Frankfort plane

c. Functional plane

d. Maxillary plane

e. All unrelated

51 / 60

The factors determining of the anchorage value ?

a. Space available

b. Root morphology

c. All are related

d. Pressure distribution in the periodontal ligament

e. Force magnitude

52 / 60

Space analysis requires a comparison between the amount of space available for the alignment of teeth and the amount of space required to align them properly, the method of space analysis when ?

a. Permanent first molars have erupted

b. Permanent first premolars have erupted

c. Permanent second molars have erupted

d. Permanent third molars have erupted

e. Permanent second premolars have erupted

53 / 60

The skeletal discrepancy of Class II malocclusion when ?

a. The maxilla normal and mandibular retrusive

b. All are related

c. The maxilla protrusive and mandibar retrusive

d. All unrelated

e. The maxilla protrusive and mandible normal

54 / 60

Tooth movement for removable appliance need ?

a. All unrelated

b. Bodily movement

c. Tipping movement

d. Uprighting movement

e. All are related

55 / 60

The measurement in dental analysis of inclination of the upper central incisors to ?

a. Cranial base or SN Line

b. Maxillary plane

c. Lower central incisors

d. Unrelated

e. All are related

56 / 60

Which component should be used in reduced overbite cases in functional appliance ?

a. Posterior capping

b. Lower inclined bite plane

c. All unrelated

d. Lower incisor capping

e. All are related

57 / 60

Transposition of the teeth when ?

a. Permanent premolar in canine position

b. Permanent canine in premolar position

c. Permanent canine in lateral position

d. All are related

e. Permanent lateral in canine position

58 / 60

The best time to correct a maxillary central incisor crossbite is ?

a. After permanent lateral incisors erupt

b. After permanent central incisors erupt

c. Unrelated

d. During erupting stage of central incisors erupt

e. After permanent canines erupt

59 / 60

The Norms of the Inter-incisal angle ( U1-L1) is ?

a. 125 ± 5 degree

b. 125 ± 4 degree

c. 125 ± 1 degree

d. 125 ± 2 degree

e. 125 ± 3 degree

60 / 60

Gold chain are usually used when the ?

a. Permanent premolar impacted

b. Permanent incisor impacted

c. Unrelated

d. All are related

e. Permanent canine impacted

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