acific Coast Society of Orthodontists Bulletin Summer 2018 - 35

Special Section

Case Report

RETENTION

Treatment Options
Option 1
1. Maxillary fixed appliance 621|126
2. High-pull headgear 12 hours/day with a transpalatal arch
3. When 1 mm overjet is achieved, start using an
inclined plane retainer
4. After growth is finished, consider mandibular
advancement surgery
Option 2
1. Bond brackets on C21|12C for alignment
2. Impressions and deliver splint headgear with
an occipital strap 14 hours/day
3. When 1 mm overjet is achieved, switch to anterior inclined bite plane retainer for nights only

4. Monitor transition to permanent dentition.
5. After growth is finished, consider mandibular
advancement surgery
Option 3
1. No Phase 1 treatment; wait for full permanent
dentition
2. Treatment plan for comprehensive orthodontic
treatment in combination with orthognathic
surgery
3. Remove mandibular first premolars, retract
mandibular incisors to increase overjet
4. Mandibular advancement

Initial panoramic radiograph and lateral cephalogram

Initial Lateral Cephalometric Measurements
Variable

Norm

Pre-Treatment

SNA (º)

82.0

85.3

SNB (º)

80.0

74.8

ANB (º)

2.0

10.6

FMA (FH-MP) (º)

25.0

31.2

SN-MP (º)

32.0

38.2

4.0

4.5

104.0

113.3

4.0

11.5

IMPA (L1-MP) (º)

90.0

107.6

Upper Lip-E Line (mm)

-4.0

9.5

Lower Lip-E Line (mm)

-2.0

11.8

U1-NA (mm)
U1-SN (º)
L1-NB (mm)

Post-treatment description of
Case J.K. begins on the next page.

Summer 2018  PCSO Bulletin

35



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