2 band fixed orthodontics

Question 1

Nance button indications? (4)

Answer 1

• PASSIVE APPLIANCE:
• MAXIMUM ANCHORAGE
• Upper bilateral space maintainer:
• To prevent mesial drift of upper 6´s

Question 2

Quadhelix anterior bridge and loops are..

Answer 2

parallel to fibromucosa

Question 3

Quadhelix posterior loops are..

Answer 3

parallel to bands

Question 4

Quadhelix actions? (6)

Answer 4

• Molar/ lateral segments expansion
• Molar rotation
• Distal molar mov.
• Molar torque
• Incisor proclination

Question 5

Quadhelix molar/lateral segment expansion? (2)

Answer 5

Posterior unilateral crossbite. Non skeleletal

Posterior bilateral crossbite. Non skeletal component

Question 6

Quadhelix molar/lateral segment expansion? (2)

Answer 6

Posterior unilateral crossbite. Non skeleletal

Posterior bilateral crossbite. Non skeletal component

Question 7

Quadhelix specific indications? (10)

Answer 7

1. Transverse maxillary dentoalveolar problem (molars
   with lingual inclination)
2. Maxillary expansion (max 5 mm.) in mixedpermanent dentition with mild crowding
3. Habit correction (thumb sucking – tongue thrust)
   Tongue crib, Pearl
4. Correction of anterior cross bites (long extensión arms)
5. Anterior teeth alignment (long extension arms)
6. Contraction of alveolar processes
7. Anchorage (without activation)
8. Molar rotation and expansion (correction of ½ unit
   class II)
9. Maintaining leeway space
10. Retention

Question 8

Quadhelix general indications?

Answer 8

• SLOW MAXILLARY EXPANSION
• Dentoalveolar action (orthodontic)
• Skeletal action only small children (orthopedic)

Question 9

Quadhelix force?

Answer 9

symmetric and reciprocal. 200 to 600g

Question 10

Quadhelix treatment duration?

Answer 10

3-6 months

Question 11

Headgear is for what molar classes? (2)

Answer 11

-class II division I
NON-GROWING P: Half class II
GROWING P: Complete class II

Question 12

Head gear force?

Answer 12

400-450g

Question 13

Head gear molar movement?

Answer 13

• distal 5-7mm in 2 years
• 3-4mm maxillary restriction
• 2-3mm distal molar movement

Question 14

Cervical (neck pull) and horizontal (occlusal plane) headgear?

Answer 14

• Distal molar tipping movement (version) + extrusion

- Used in Brachycephalic patients (also in increased overbite patients)

Question 15

Occipital head gear?

Answer 15

Distal bodily movement (gresion) without

vertical component → Mesocephalic patients

Question 16

High occipital head gear?

Answer 16

• Distal molar tipping
  movement (version) + Intrusion.
• Dolichocephalic
  patients (also anterior open bite patients)

Question 17

Lingual arch indications?

Answer 17

• Prevent mesial drift of 6-6
• Space mantainer (MD 2nd phase)
• Maintain leeway space
- PASSIVE
• Maximum anchorage
• (1/3 anchorage loss)

Question 18

Lingual arch molar/incisor movements?

Answer 18

• Molar expansion
• Molar compression
• Incisor proclination
• Molar Torsion
• Correct molar lingual inclination

Question 19

Lip bumper actions? (5)

Answer 19

▪ Pressure relief from lower lip and buccinator
▪ Lingual musculature: incisor proclination and mild
transverse expansion
▪ Lower lip exerts distal force over 6,s.
• Molar torsion
▪ Avoids inferior labial interposition

Question 20

Lip bumper indications? (4)

Answer 20

♦ Molar anchorage.
♦Molar uprighting (Distal movement) due to early
loss of E´s
♦ Habit Prevention (Inferior lip interposition)
♦Increase arch perimeter

Question 21

Lip bumper muscle actions?

Answer 21

Do this slide

Question 22

Short lip bumper?

Answer 22

No need for distal movement of 6’s

Question 23

Lip bumpers

Answer 23

DO these