242 Orthodontic- Prof. Mom Sovanrithy

242 Questions | By Hengthavuth8716 | Last updated: Mar 21, 2022 | Total Attempts: 220

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1.

Lower incline bite plane use for correcting?
- A.
  
  Posterior cross bite
- B.
  
  Unilateral cross bite
- C.
  
  Bilateral cross bite
- D.
  
  Simple anterior cross bite
2.

What is the lower incline bite plane?
- A.
  
  Fixed appliance
- B.
  
  Removable appliance
- C.
  
  Functional appliance
- D.
  
  An appliance for correct simple cross bite
3.

Lower incline bite plane cover the teeth of ?
- A.
  
  Lower buccal segment
- B.
  
  Upper labial segment
- C.
  
  Upper buccal segment
- D.
  
  Lower labial segment
4.

Lower incline bite plane we make incline in?
- A.
  
  30 degree
- B.
  
  15 degree
- C.
  
  60 degree
- D.
  
  45 degree
5.

How many bend orders is the most comment use in orthodontic?
- A.
  
  2
- B.
  
  4
- C.
  
  5
- D.
  
  3
6.

What is the 2nd bend order mean?
- A.
  
  Torqueing
- B.
  
  In-out
- C.
  
  Up-down
- D.
  
  Tiping
7.

The most comment used of wire in fixed appliance is?
- A.
  
  Round and triangle
- B.
  
  Rectangular and triangle
- C.
  
  Bending wires
- D.
  
  Rectangular and round
8.

How many direction do fixed appliance can do?
- A.
  
  4
- B.
  
  5
- C.
  
  3
- D.
  
  6
9.

Which one is the auxiliaries’ component in fixed appliance?
- A.
  
  Brackets
- B.
  
  Wire
- C.
  
  Molar bend
- D.
  
  Power chain
10.

What is the clinical feature of fixed appliance?
- A.
  
  Fixed brackets to removable appliance
- B.
  
  Bonded bracket to an appliance
- C.
  
  The appliance that can be remove
- D.
  
  Bonded bracket to the teeth
11.

What is the most common appliances to avoid for adult orthodontic?
- A.
  
  Removable appliance
- B.
  
  Fixed appliance
- C.
  
  Lingual brace
- D.
  
  Head Gear and Face Mask
12.

What is the problem can increased risk of root resorption:?
- A.
  
  Long roots.
- B.
  
  Previously caries
- C.
  
  Light forces
- D.
  
  No vital or root treated
13.

What is the risk of orthodontic treatment?
- A.
  
  Carries
- B.
  
  Periodontal disease
- C.
  
  Bone fracture
- D.
  
  Root resorption
14.

What is the most comment risk in orthodontic treatment?
- A.
  
  Retention
- B.
  
  Over correction
- C.
  
  Good digitation
- D.
  
  Relapse
15.

What is the meaning of balancing extraction?
- A.
  
  Extraction upper and lower tooth in both side
- B.
  
  Extraction upper and lower tooth in one side
- C.
  
  Both side in two arches
- D.
  
  Extraction Both side in one arch
16.

What is the meaning of compensating extraction?
- A.
  
  Upper and lower tooth in one side
- B.
  
  Both side in one arch
- C.
  
  Both side in two arches
- D.
  
  Upper and lower teeth in both arches
17.

Why we use retainer after finishing orthodontic treatment?
- A.
  
  Allow teeth eruption
- B.
  
  Allow growth change
- C.
  
  Prevent 3rd molars eruption
- D.
  
  Preventing teeth relapse
18.

What is the factor related to retention to be consider at the treatment planning stage?
- A.
  
  Growth spurt
- B.
  
  Extraction decision
- C.
  
  Growth modification
- D.
  
  Type of retention
19.

Which one the factor may modify retention protocol?
- A.
  
  Crowding
- B.
  
  Missing teeth
- C.
  
  Dental caries
- D.
  
  Lower incisors alignment
20.

What is the condition that requires short term retention?
- A.
  
  Expanded arches
- B.
  
  Serial extraction procedures
- C.
  
  Midline shift
- D.
  
  Deep bite
21.

Which condition that require long term retention?
- A.
  
  High place canines in class one extraction cases
- B.
  
  Posterior cross bite in patients having step cusp
- C.
  
  Extraction cases
- D.
  
  Severe rotation
22.

Which condition that does not require retention?
- A.
  
  Sever rotation
- B.
  
  Median diastema
- C.
  
  Deep bite
- D.
  
  Anterior cross bite
23.

Which classification of malocclusion, Over jet is increased?
- A.
  
  Class III malocclusion
- B.
  
  Class II division 2 malocclusion
- C.
  
  Class I malocclusion
- D.
  
  Class II division 1 malocclusion
24.

Which one is the Over jet of Class I malocclusion?
- A.
  
  Upper incisors are Proclined and OJ < 2mm
- B.
  
  Upper incisors are Retroclined OJ = 1mm
- C.
  
  Upper incisors are Proclined and OJ>4mm
- D.
  
  Upper incisors are Proclined and OJ =3mm
25.

Which one the most likely the Over jet of Class II division1 malocclusion?
- A.
  
  Upper incisors are Proclined, OJ < 2mm
- B.
  
  Upper incisors are Retroclined , OJ = 1mm
- C.
  
  Upper incisors are Proclined, OJ =3mm
- D.
  
  Upper incisors are Proclined, OJ>4mm