- To hold the lower molars in place
- To negate the hypertonic lip pressure To allow the lower anteriors to flare
- To distalize the lower molars when, Class III elastics are worn
Instruments & Materials Needed (Prior to Start of Class):
- Band Pusher/Scaler
- Hollow Chop
- Ligature Remover/Director
- Light Wire Plier (Long Bird Beak)
- Mathieu Plier– Hook Tip & Wide Tip
- Pin and Ligature Cutter
- Three Prong Clasp Plier
- Weingardt Plier
- Lip Bumper with hooks
- U/L .020 Stainless Steel Archwires
- .012 Long Ligature Wires
- 1/4” Light Elastics
More detail on steps 8 and 9.
- If the second molars are present, they should be banded and engaged to the first with a segmental archwire.
- The lip bumper should be 5mm away from the premolars.
- The lip bumper should be 3mm away from the cuspids.
- The lip bumper should be 2mm away from the anteriors.
It usually takes 9 to 12 months to get the expansion and movement you want.
If you want the anteriors to move labially, place the lip bumper in the middle 1/3 of the crown.
If you do not want the anteriors to move, place the lip bumper in the gingival 1/3 of the crown.
If you want to upright the first or second molars, place the lip bumper in the incisal 1/3 of the crown.
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