MCQ orthodontic mey phoung1
Orthodontic Knowledge Quiz
Welcome to the Orthodontic Knowledge Quiz! Test your understanding of orthodontics and enhance your expertise in this specialized field. This quiz contains 50 multiple choice questions designed to challenge your knowledge and application in orthodontic principles.
Key features of the quiz include:
- 50 engaging multiple choice questions
- Instant scoring after each question
- Covers various important topics in orthodontics
The conjunction of the fronto-nasal suture ?
Frontal
Sella
Nasion
Nasa
Basion
What type of extra- oral traction when combined with fixed appliance treatment ?
Headgear
Mini- implant
Inter- traction
Intra- traction
All are relate
High pull headgear was indicated in case of lower anterior facial height ?
Decrease
Increase
Normal
MMPA < 27 ± 3 deg
Unrelate
Function of active component to apply force to the teeth in order to move teeth known as ?
Springs
Screws
Labial bow ( active )
Elastic
All are related
Frankfort Horizontal is a reference plane constructed by joining which of the following landmarks?
Nasion and Sella
Porion and Sella
σ� Porion and Nasion
σ� Porion and Orbitale
Basion and Orbitale
The best time to correct a maxillary central incisor crossbite is ?
After permanent canines erupt
After permanent central incisors erupt
After permanent lateral incisors erupt
During erupting stage of central incisors erup
Unrelated
Which of the following conditions is usually present in a Class II, Division 2 malocclusion?
Open bite
Steep mandibular plane
Mesiocclusion of permanent first molars
Lingual inclination of maxillary central incisors
Unrelated
The type of movement usually produced by a removable appliance is ?
Torque
Tipping
Rotation
Bodily movement
Un related
Anterior teeth are most likely to be fractured in children with which of the following mixed dentition malocclusions?
Class I
Class II Division 1
Class II DIvision 2
Class III
There is no relation
What factors that effect to relapse overbite correction after orthodontic treatment ?
No enough overbite
No occlusal stop
Growth of the mandible
All are relate
Unrelated
The use of lateral Cephalometric radiograph in diagnosis for focusing on the skeletal pattern in dimension view ?
Antero-posterior
Transverse
In-out
σ� All are related
Unrelated
What diagnosis will be found when the lateral cephalometric tracing was finished ?
Skeletal pattern
Dental base length
Soft tissue
Dental factors
All are related
The anterior point of the fronto-nasal suture is ?
A Point
B Point
S Point
N Point
All unrelated
The deepest point on the concavity of the mandibular profile between the point of chin and the alveolar crest is ?
A Point
σ� B Point
N Point
S Point
All unrelated
The deepest point on the maxillary profile between anterior nasal spine and the alveolar crest is ?
A Point
B Point
Ba Point
σ� S Poin
All unrelate
The most posterior, inferior point on the angle of the mandible ?
B Point
σ� Po Point
Ba Point
Go Point
All unrelated
The lowermost point on the mandibular symphysis ?
B Point
Me Point
Po Point
Pog Point
σ� All unrelated
The maxillary plane ( Mx ) was represented by a line drawn through from ?
ANS and PNS
ANS and Po
PNS and Or
PNS and Go
All unrelated
The Mandibular plane ( Mn ) was represented by a line drawn through from ?
Me and Pog
Me and Po
Me and Ba
Me and Go
All unrelated
The most inferior point on the marginal of the orbit ?
A Point
B Point
Or Point
Po Point
All unrelated
The highest point on the bony external auditory meatus ?
Or Point
Po Point
Ba Poin
S Point
All unrelated
The Franfort plane ( FP ) was represented by a line connecting from
Po and ANS
Po and Nasion
Po and Pog
Po and Or
Unrelate
The most anterior point of the bony chin ?
Me Point
B Point
Pog Point
Ii Point
All unrelated
. Functional occlusal plane ( FOP ) was represented by a line that passes through the occlusion of the ?
Mesial cusps of the most anterior permanent molar and halfway between the tips of the upper and lower central incisors
Mesial cusps of the permanent molar and halfway between the tips of the upper and lower central incisors
Distal cusps of the most anterior permanent molar and halfway between the tips of the upper and lower central incisors.
Distal cusps of the permanent molar and halfway between the tips of the upper and lower central incisors.
All unrelated
The upper anterior facial height is a line that is perpendicular to ?
The Maxillary plane from the S Point
The Maxillary plane from the N Point
The Maxillary plane from the frontal bone
The Maxillary plane from the nasal bone
All unrelated
The lower anterior facial height is a line that is perpendicular to ?
The Maxillary plane from the B Point
The Maxillary plane from the Pog Point
σ� The Maxillary plane from the chin
The Maxillary plane from the Me Point
All unrelated
The location of the Basion ( Ba Point ) was known as ?
The most inferior point of the Porion
In the middle point of the sella turcica
Nearest the zygomatic bone
The most superior of the condylar head
All unrelate
In the cranial base & cranium landmark there are the main five points as below:
Sella, Nasion, Porion, ANS and PNS
Sella, Nasion, Porion, Pogonion and Orbitale
Sella, Nasion, Porion, Basion and Orbitale
σ� Sella, Nasion, Porion, Basion and Menton
Unrelated
The mandibular landmark were known as below: ?
Pogonion, Menton, Porion, Point B, Ii
Pogonion, Nasion, Gonion, Point B, Ii
Pogonion, Menton, Gonion, Point B, Ii
Pogonion, Basion, Gonion, Point B, Ii
σ� All unrelated
The factor effect to the choice for teeth extraction when the space is required as follows ?
Teeth are poor prognosis
Teeth are well alignment with spacing
Anchorage requirements is enough
Teeth are well alignment without spacing
All are related
Definition of class I incisor relationship that lower incisor edge occlude to ?
Directly to cingulum ptateau of the upper inciso
Posteriorly of cingulum ptateau of the upper incisor
Anteriorly of cingulum ptateau of the upper incisor.
σ� Unrelated
All are related
The trauma to the tooth when the heavy force to supply ?
Crown fracture
Root fracture
Root resorption
Tooth los
All are related
The convexity of the face with profile view when the ?
Skeletal is class III base
Skeletal is class II base
Skeletal is class I base
Skeletal discrepancy
Unrelated
The concavity of the face with profile view when the
Skeletal is class III base
Skeletal is class II base
Skeletal is class I base
σ� Skeletal discrepancy
Unrelated
The premature contact when the teeth bite by ?
Posteriorly
Maximum inter-cuspation
Anteriorly
The edge to edge
Unrelated
Case selection for removable appliance when skeletal pattern as below
2˚≤ ANB ≤4˚
4˚˂ ANB ˂6˚
0˚≤ ANB ≤1˚
All are related
All unrelated
Tooth movement for removable appliance need ?
Tipping movement
Bodily movement
Uprighting movement
All are related
All unrelated
Which degree of rotation in tooth movement when the URA is indicated
The tooth that has 45º rotation
The tooth that has less than 45º rotation
The tooth that has more than 45º rotation
All are related
All unrelated
Which teeth apexes are suitable for removable appliance ?
The teeth apexes are displaced
The apexes are not diplaced
The apexes are resorbed
All are related
All unrelated
Which case for removable appliance should be indicated when ?
Posterior crossbite without mandibular displacement
Posterior crossbite with mandibular displacement
Bilateral buccal crossbite
All are related
All unrelated
Contra- indication for removable appliance when ?
Teeth need bodily movement
σ� very deep overbit
Severe imbalance skeletal pattern
All are related
All unrelated
The components for removable appliances ?
Active component
Retentive components
Anchorage
Baseplate
All are related
What is the function for active components
To prevent the teeth move in any places
To apply force to the teeth in order to move teeth
To keep in position all the teeth
All are related
All unrelated
Types of active components ?
σ� Adams clasp
Southend clasp
Clasp
Springs
All are related
What types of springs for removable appliances ?
Z spring
σ� Buccal canine retractor
σ� T spring
All are related
All unrelated
Which size of wire for palatal finger spring ?
0.5 mm
σ� 0.7 mm
0.9 mm
1.0 mm
All unrelated
Which size of wire for buccal canine retractor ?
0.6 mm
0.7 mm
0.8 mm
0.9 mm
All unrelate
Which size of wire for Z spring ?
0.5 mm
0.7 mm
0.9 mm
All are relate
All unrelated
Which size of wire for T spring ?
0.9 mm
0.7 mm
0.5 mm
0.3 mm
All unrelated
What function for palatal finger spring ?
To move a tooth to buccally
To move a tooth to palatally
To move a tooth to mesially or distally
To move a tooth to buccally or palatally
All unrelated
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