Deep overbites can be effectively treated with preadjusted appliances by following several principles: using smaller archwires initially, incorporating anterior bite plates in moderate to low angle cases, and using light initial forces to avoid worsening the deep bite. Banding or bracketing the second molars early and selectively using Class II elastics can also help open the bite in moderate to low angle cases. It is important to not hurry final leveling of the arches and to use gentle forces during space closure in extraction cases to prevent worsening the deep bite.

1. Pre-adjusted Edgewise Appliance
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2. Deep overbites can be effectively controlled with preadjusted appliances
when the following principles are observed:
1. Avoid extractions in low-angle cases whenever possible.
2. When using .022" slots use .019"×.025" working archwires.
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3. Upper anterior bite plate is effective in initial leveling stages of moderate-to-low-
angle deep bite cases.
3.Use anterior bite plates at the beginning of treatment in moderate-to-
low angle cases.
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4. Use of elastics during initial
leveling and aligning causes
"roller coaster" effect—
tipping of cuspids into
extraction sites with resultant
posterior open bite and
increase in anterior overbite.
4. Use light initial forces to avoid deepening the bite.
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5. Preadjusted brackets on upright
or distally tipped cuspids create
extrusive effect on incisors upon
initial archwire placement.
"Lacebacks" prevent anterior tipping
of cuspids and retract cuspids
without distal tipping.
5. Avoid elastic retraction of cuspid brackets.
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6. Earliest possible banding of second molars helps open bite in moderate-to-low-
angle cases.
6. Band or bracket second molars as early as possible.
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7. With Class II elastics, extrusive force on lower posterior teeth encourages bite
opening.
7. Use Class II elastics selectively.
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8. Slight accentuated curve in upper archwire and reverse curve in lower
archwire can sometimes enhance bite opening during completion of leveling
with rectangular archwires.
8. Do not hurry final leveling of the arches; use flat rectangular wires at
first, then add bite opening curves as needed.
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9. Excessive force on rectangular wires during space closure can cause archwire
deflection and binding, ineffective sliding mechanics, loss of anterior torque
control, and bite deepening.
9. Use gentle forces for space closure in extraction cases.
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