2 band fixed orthodontics Flashcards
Nance button indications? (4)
- PASSIVE APPLIANCE:
- MAXIMUM ANCHORAGE
- Upper bilateral space maintainer:
- To prevent mesial drift of upper 6´s
Quadhelix anterior bridge and loops are..
parallel to fibromucosa
Quadhelix posterior loops are..
parallel to bands
Quadhelix actions? (6)
- Molar/ lateral segments expansion
- Molar rotation
- Distal molar mov.
- Molar torque
- Incisor proclination
Quadhelix molar/lateral segment expansion? (2)
Posterior unilateral crossbite. Non skeleletal
Posterior bilateral crossbite. Non skeletal component
Quadhelix molar/lateral segment expansion? (2)
Posterior unilateral crossbite. Non skeleletal
Posterior bilateral crossbite. Non skeletal component
Quadhelix specific indications? (10)
- Transverse maxillary dentoalveolar problem (molars
with lingual inclination) - Maxillary expansion (max 5 mm.) in mixedpermanent dentition with mild crowding
- Habit correction (thumb sucking – tongue thrust)
Tongue crib, Pearl - Correction of anterior cross bites (long extensión arms)
- Anterior teeth alignment (long extension arms)
- Contraction of alveolar processes
- Anchorage (without activation)
- Molar rotation and expansion (correction of ½ unit
class II) - Maintaining leeway space
- Retention
Quadhelix general indications?
- SLOW MAXILLARY EXPANSION
- Dentoalveolar action (orthodontic)
- Skeletal action only small children (orthopedic)
Quadhelix force?
symmetric and reciprocal. 200 to 600g
Quadhelix treatment duration?
3-6 months
Headgear is for what molar classes? (2)
-class II division I NON-GROWING P: Half class II GROWING P: Complete class II
Head gear force?
400-450g
Head gear molar movement?
- distal 5-7mm in 2 years
- 3-4mm maxillary restriction
- 2-3mm distal molar movement
Cervical (neck pull) and horizontal (occlusal plane) headgear?
- Distal molar tipping movement (version) + extrusion
- Used in Brachycephalic patients (also in increased overbite patients)
Occipital head gear?
Distal bodily movement (gresion) without
vertical component → Mesocephalic patients
High occipital head gear?
- Distal molar tipping
movement (version) + Intrusion. - Dolichocephalic
patients (also anterior open bite patients)
Lingual arch indications?
• Prevent mesial drift of 6-6 • Space mantainer (MD 2nd phase) • Maintain leeway space - PASSIVE • Maximum anchorage • (1/3 anchorage loss)
Lingual arch molar/incisor movements?
- Molar expansion
- Molar compression
- Incisor proclination
- Molar Torsion
- Correct molar lingual inclination
Lip bumper actions? (5)
▪ 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
Lip bumper indications? (4)
♦ Molar anchorage.
♦Molar uprighting (Distal movement) due to early
loss of E´s
♦ Habit Prevention (Inferior lip interposition)
♦Increase arch perimeter
Lip bumper muscle actions?
Do this slide
Short lip bumper?
No need for distal movement of 6’s
Lip bumpers
DO these
