Ortho MCQ Flashcards
Anchorage may be reinforced by?
- Using transpalatal arch with fixed appliance
Fixed appliances are efficient at?
- Correct multiple tooth malpositions
Functional appliances are mainly used to ?
- Correct sagittal discrepency in Class II div 1 cases
Removable appliances are effective at?
- Tipping teeth
Removable appliances are useful for?
- Maintaining space
What can you use to assess the antero-posterior skeletal pattern clinically?
- Palpation of skeletal bases
What numbers represent moderate crowding?
- 4-8mm
What is the definition of Class II div 1 insisor relationship?
- Lower incisor edges lie posterior to cingulum plateau of upper incisors, increased overjet and incisors usually proclined
When measuring the overjet clinically what applies?
- Pt Frankfort mandibular plane angle should be vertical (FMPA)
What can be used to assess the vertical skeletal pattern clinically>
- FMPA (frankfort mandibular plane angle)
The aesthetic component of IOTN?
- Is of use in rating dental attractiveness
The dental health component of IOTN?
- Assessed using the MOCDOO system
A pt whose worst occlusal feature is unilateral unerupted ectopic canine would score with IOTN DHC?
- 5i
The P.A.R index is?
- Peer assessment rating index
The histological response for light forces generated during ortho trx includes what?
- Frontal resorption
How much force is required to tip a tooth?
- 35-60g mN
What conditions thought to produce optimal orthodontic tooth movement?
- Light continuous forces
What is a deleterious effect of orthodontic txt?
- Root resorption
What is the average optimal rate of tooth movement?
- 1mm a month
The meaning of the term anchorage is?
- Resistance to unwanted tooth movement
Anterior bite planes are used for?
- Reducing overbite
An adams clasp is formed of?>
- 0.7mm Hard SS wire
The R in pneumonic ARAB stands for?
- Retention
A buccal canine retractor is used?
- Where a canine needs to be moved palatally