BDS4 week 1

Question 1

types of retaines?

Answer 1

• conventional removable retainers
• thermoplastic retainers
• bonded retainers

Question 2

what is this

Answer 2

transpalatal arch

Question 3

what is uses of transpalatal arch

Answer 3

• anchorage
• rotation
• limited widening or contraction

Question 4

what is this

Answer 4

palatal arch with a nance button

Question 5

use for palatal arch with a nance button

Answer 5

anchorage

Question 6

what is this

Answer 6

quadhelix

Question 7

uses of quadhelix

Answer 7

Bilateral expansion
Asymmetrical expansion
Fan style expansion
Rotation of Molars
Expansion in cleft palate
Modified to procline incisors
Assist in habit breaking

Question 8

advantages of fixed ortho

Answer 8

• Bodily Tooth movement
• Rotations easily fixed
• Can be used as easily in the lower arch as well as the upper
• Individual force can be applied to every tooth
• Not easily removed by the patient
• Works 24 hours / 7 days a week
• Precise 3D movement of teeth
• Less invasive of tongue space
• Minimal palatal coverage

Question 9

disadvantages of fixed ortho

Answer 9

• Increased risk of root resorption
• Decalcification
• Can be perceived as visually unattractive
• Can cause soft tissue trauma
• Cost
• High motivation in regards to oral hygiene
• Poor anchorage
• Highly trained specialist training
• Etching teeth is a destructive procedure