Orthodontic I Test

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Orthodontic I Test

1 / 60

A direct growth movement that is produced by deposition on one side of the orbital plate with resorption on the opposite side is?

a. displacement

b. translation

c. remodeling

d. cortical drift

2 / 60

At birth, which of the following structures is nearest the size it will eventually attain in adulthood?

a. cranium

b. maxilla

c. nasal septum

d. mandible

3 / 60

Diastema closure of 2 central incisors by elastic traction, tipping the crowns together.?

a. simple, reciprocal, intraoral, intramaxillary

b. none

c. stationary, reciprocal, intraoral, intermaxillary

d. simple, reciprocal, intraoral, intermaxillary

4 / 60

Treacher-collin syndrome?

a. mandibular dysostosis

b. micromandible

c. abnormal resorption of deciduous dentition

d. late eruption of permanent teeth

e. inhibited growth of mandible

5 / 60

Predominant type of malocclusion seen in mixed dentition is?

a. all are corrects

b. class II division 1

c. crowding

d. anterior open bite

6 / 60

The nature of degree of resistance and displacement of an anatomic unit for the purpose of effective tooth movement.?

a. retention

b. anchorage

c. active element

d. tissue reaction

7 / 60

Incisor liability:?

a. Difference between interdental and primate space

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

c. Difference between primate and leeway space

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

8 / 60

Sequence of eruption of maxillary permanent teeth.?

a. none of the above.

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

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

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

9 / 60

Permanent teeth that erupt posterior to the primary teeth?

a. successional teeth

b. supernumerary teeth

c. accessional teeth

d. successional teeth and accessional teeth

10 / 60

Intrauterine molding may lead to…?

a. mandibular prognathism

b. anterior open bite

c. maxillary deficiency

d. maxillary protrusion

11 / 60

The main growth site of the mandible which is responsible for its increase ion height?

a. condyle

b. symphysis

c. gonial angle

d. posterior border of the ramus

e. inferior border of the body

12 / 60

Which of the following factors will not increase maxillary width?

a. deposition at the fronto-maxillary suture

b. deposition at the median palatine sutre

c. deposition at the lateral walls

d. growth of the palate following “V” principle

13 / 60

The anchorage utilizing the neck is?

a. cervical

b. cranial

c. occipital

d. facial

14 / 60

The prognosis for successful alignment of a palatally impacted upper canine :

a. Root space of canine should be distal to second premolar

b. Upper canine should overlap not more than the mesial aspect of lateral root and not higher than apical third of the root of lateral

c. Incisor root should be parallel to lateral root

d. Long axis of upper canine to mid-sagittal plane should be 90°

15 / 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. ⅝ of the labial surface of the upper central incisor

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

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

e. All unrelated

16 / 60

Dental analysis, how can lower central incisor compares to ?

a. Facial plane

b. Franfort plane

c. Occlusal plane

d. Mandibular plane

e. All unrelated

17 / 60

The normative values of SNA angle for the A-P Jaw relationship of the Caucasian Norm: ?

a. SNA: 81±1

b. All unrelated

c. SNA: 81±4

d. SNA: 81±3

e. SNA: 81±2

18 / 60

The inclination of mandibular plane to the true horizontal or Franfort plane should be note ?

a. Anterior open bite malocclusion

b. A flat mandibular plane angle correlates with short anterior face height

c. A steep mandibular plane angle correlates with long anterior face height

d. All are related

e. Deep bite malocclusion

19 / 60

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

a. Class III

b. Class II div 1

c. Class II div 2

d. There is no relation

e. Class I

20 / 60

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

a. 96 ± 3 degree

b. 96 ± 4 degree

c. 96 ± 2 degree

d. 96 ± 5 degree

e. 96 ± 1 degree

21 / 60

A 11 years old girl who has class I malocclusion and skeletal I base , the upper and lower teeth alignment associated with unilateral posterior crossbite and mandibular displacement. How can treat this patient ?

a. Functional appliance

b. All are related

c. Orthognatic surgery

d. Arch expansion screw

e. All unrelated

22 / 60

Root formation is normally completed after eruption in year:

a. 2-3 years

b. 2-6 years

c. 2-4 years

d. 2-5 years

23 / 60

The anterior point of the fronto-nasal suture is ?

a. All unrelated

b. S Point

c. N Point

d. A Point

e. B Point

24 / 60

Orthodontic treatment can improve:

a. All are related

b. Speed

c. The appearance

d. Mastication

25 / 60

Early lost of the 1st permanent molars may lead to ?

a. Spacing in the arch

b. Second premolars tipping distally

c. All are related

d. Extrude the upper or lower permanent molars in antagonist

e. Bone resorption

26 / 60

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

a. Maxillary plane

b. Unrelated

c. Cranial base or SN Line

d. Lower central incisors

e. All are related

27 / 60

When the upper second permanent molar make the extraction decision, what would we check ?

a. All unrelated

b. Check the distance for distalization

c. All are related

d. Check the upper third molar

e. Check the degree of crowding

28 / 60

Flush terminal plane :

a. Is the line from Mesio-buccal cusp of first molar to canine tip

b. Is the line of occlusal plane

c. Is the distal surface of upper E and lower E usually end in line with each other

d. Is the line of the mid of the face

29 / 60

When the first permanent molar was extracted, what’s happened in this area ?

a. The second permanent molar tilt distally

b. The second permanent molar tilt mesially

c. All are related

d. The second permanent molar intruded

e. The second permanent molar extruded

30 / 60

How can creating space for teeth alignment ?

a. Enamel stripping

b. All are related

c. Extraction

d. Distal movement of molars

e. Expansion

31 / 60

When the child was 6 to 8 years old what can you see the permanent teeth had erupted ?

a. All are related

b. Lower incisors

c. Lower first miolars

d. Upper first molars

e. Upper incisors

32 / 60

Usually reduced face height is associated with ?

a. Open bite

b. Normal bite

c. Deep bite

d. Cross bite

e. All unrelated

33 / 60

The factor 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. Teeth are well alignment without spacing

e. All are related

34 / 60

What are the following active components in removable appliance that effect to correct distally inclined canine ?

a. Buccal canine retractor

b. Distal movement by headgear

c. All unrelated

d. Robert retractor

e. Class I traction

35 / 60

The main reasons for doing orthodontic treatment:

a. 4

b. 3

c. 5

d. 6

36 / 60

The indication for functional appliance , what is ideal patient ?

a. Growing patient with the angle of FMPA increase

b. All are related

c. All unrelated

d. Growing patient with anterior open bite

e. Growing patient with average or FMPA decrease

37 / 60

Functional appliance can help accelerate growth when ?

a. Growth has ceased

b. Growth of the maxilla

c. Growth in time of growth spurt

d. All unrelated

e. Growth of the Cranial Vault

38 / 60

Occlusal development divided into:

a. 3 stages

b. 5 stages

c. 6 stages

d. 4 stages

39 / 60

Premature loss of deciduous teeth, when the C and D in unilateral loss cause ?

a. All unrelated

b. All are related

c. Midline shift to the side of extraction

d. The first permanent molars drift distally

e. The E’s drift backwards

40 / 60

How many types of twin block for functional appliance?

a. Two types

b. All unrelated

c. All are related

d. One type

e. Three types

41 / 60

Premature loss of deciduous teeth, when the C and D in bilateral loss cause ?

a. All unrelated

b. All are related

c. The first permanent molars and the E’s to drift forwards

d. The first permanent molars and the E’s are rotated

e. The first permanent molars and the E’s are tilting

42 / 60

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

a. All unrelated

b. A Point

c. Ba Point

d. B Point

e. S Point

43 / 60

Normal overjet is:

a. 5mm

b. 2mm

c. 4mm

d. 3mm

44 / 60

The location of the Basion ( Ba Point ) was known as ?

a. The most inferior point of the Porion

b. All unrelated

c. In the middle point of the sella turcica

d. The most superior of the condylar head

e. Nearest the zygomatic bone

45 / 60

The Lee way space of the upper arch is ?

a. All unrelated

b. Smaller than the Lower arch

c. Lee way space are the same

d. Greater than the Lower arch

e. Lee way space upper arch is narrow

46 / 60

Modules were used in fixed appliances in order to hold ?

a. Wires

b. Bands

c. Brackets

d. All are related

e. All unrelated

47 / 60

Why the lower inclined bite plane was indicated ?

a. No areas for retention at the buccal teeth

b. All are related

c. Cheap

d. Easy to produce

e. Poor prognosis of all the teeth in buccal segment both side

48 / 60

The use of Cephalometric radiograph for focusing on the skeletal pattern in dimension view ?

a. All are related

b. Antero-posterior

c. Transverse

d. Unrelated

e. Vertical

49 / 60

The Functional was defined as Removable or fixed appliance that ?

a. Force was transmitted to the dentition

b. All are related

c. Posture the mandible move forward

d. Force was transmitted to the skeletal structure

e. stretching the muscles

50 / 60

What function for Buccal canine retractor ?

a. To move a buccally erupted canine palatally and mesially

b. To move a buccally erupted canine palatally and labially

c. To move a buccally erupted canine palatally and distally

d. All unrelated

e. To move a buccally erupted canine palatally and buccally

51 / 60

Transposition of the teeth when ?

a. Permanent lateral in canine position

b. Permanent canine in premolar position

c. Permanent canine in lateral position

d. Permanent premolar in canine position

e. All are related

52 / 60

The Norms value of the Frankfort Mandibular plane angle (FMPA) ?

a. 25 ± 2 degree

b. 25 ± 5 degree

c. 25 ± 4 degree

d. All unrelated

e. 25 ± 3 degree

53 / 60

The Norms value of the Maxillary Mandibular plane angle (MMPA) ?

a. 27 ± 1 degree

b. All unrelated

c. 27 ± 2 degree

d. 27 ± 0 degree

e. 27 ± 3 degree

54 / 60

What types of springs for removable appliances ?

a. Z spring

b. All are related

c. T spring

d. All unrelated

e. Buccal canine retractor

55 / 60

The removable appliance that allow eruption of lower posterior teeth ?

a. All unrelated

b. Working bite

c. All are related

d. Upper inclined bite plane

e. Lower inclined bite plane

56 / 60

How many types of the degree of crowding ?

a. 5 types

b. 4 types

c. 3 types

d. 2 types

e. All aren’t related

57 / 60

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

a. All are related

b. Anterior bite plane

c. Molar capping

d. Posterior bite plane

e. Head gear

58 / 60

Approximate space requirement to flatten a curve of spee when the curve is 5 mm or more than the space requirement is?

a. 2mm

b. 1mm

c. 4mm

d. 3mm

e. All unrelated

59 / 60

The patient who has to need for fixed retainers after post- treatment of orthodontic when?

a. All are related

b. Teeth are Periodontology

c. Teeth are spacing

d. Unrelated

e. Teeth are rotation

60 / 60

The early loss of deciduous teeth would cause ?

a. Crowding in the buccal segment

b. Loss of space will be faster

c. All are related

d. Loss of space will be more severe

e. All unrelated

Your score is

The average score is 92%

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