Week 3 Localized space shortage (Space regaining) Flashcards
Moderate localized space discrepancy is when……
space of shortage ≤ 3mm per quadrant
Permanent molar ectopic eruption is _____ and often _____. It is common in the ___ arch
Painless
self correcting
maxillary
If ________ is lost, space loss can be dramatic and beyond the moderate localized discrepancy.
Primary molar
When the __________ is missing, careful planning and good timing can lead to beneficial substitution.
Succedaneous premolar
Brass wire is used when space loss is about ______.
1 mm of resorption (overlap)
True or False?
When space loss is more dramatic, a brass wire separator will not work.
True
Band and spring is used to….
a nice way to tip molars back and preserve the second primary molar.
What is the modified band and spring
no soldering
intraoral fabrication
(instead of soldering a spring to it, bend a wire and form a spring intraorally and bond it to the moalr and kick it back)
how is the bonded spring used?
most efficient and modern way to do it.
No banding, intraoral fabrication
bond two brackets, one on the 2nd primary molar and one on the first permanent molar. Make a spring between them to let them engage and open up the space.
Band and spring biomechanics?
Single force not thru Cres (Very high Cres)
Uncontrolled distal crown tip to move tooth back
Successful in 1 month if seen in 2 week intervals
Treatment options for permanent molar ectopic eruption?
- band and spring
- Modified band and spring
- Bonded spring
- Brass wire
Treatment options for loss of primary molar
- Removable appliance
2. banded and bonded
Hawley with finger spring?
Single force not through Cres, uncontrolled distal crown tip
Anchorage on teeth and palate
Once repositioned, use band and loop to maintain it.
Banded and Bonded appliance?
uses open coil spring and arch wire
Reciprocal forces applied buccal to Cres and it produces the rotation of teeth
(Forces on molar, distal force and moment producing the rotation)
LLHA is inefficient way to move teeth because??
The wire is too heavy and has a little range of movement that the activations have to be very small (1 to 1.5mm at most)
