Class III
,
Posterior crossbite
,
Anterior crossbite
,
Edge to edge bite
,
Narrow arches
,
Asymmetric arches
,
Mandibular midline deviation
,
Midline shift
,
Crowding
,
Rotations

Distalization
,
Leveling Curve of Spee
,
Intrusion
,
Expansion
,
IPR
,
Elastics: Class III
Courtesy of Dr J. Weng, 2023
Before picture of treatment

Treatment Summary

Patient Information

  • Age: 18
  • Gender: female
  • Invisalign Submission Option: Invisalign Teen

Total Treatment Time

  • 22 months

Number of aligners

  • Maxillary: 53 + 11 = 64
  • Mandibulary: 57 + 15 = 72

Aligner Wear time

  • 1-week

Retention

  • Maxillary: Hawley
  • Mandibular: Hawley

Results achieved

  • Class I relationship achieved
  • Functional canine guidance on both sides
  • Anterior crossbite corrected
  • Posterior crossbite corrected
  • Normal  overjet and overbite achieved
  • Midlines coincident
  • Proper axial inclination of incisors
  • Curve of Spee leveled
  • Arches aligned and coordinated
  • Alignment of both arches through derotation
  • Arch form improved
  • Aesthetic smile line was achieved 
  • Harmonic arches were achieved

Comments

  • This patient is skeletal Class III(ANB=-3°) with mandibular deviation.
  • Invisalign aligners have advantages on molar distalization. The lower left molars are distally moved by 3.2mm and the lower right molars are distally moved by 1mm, which help retracting the lower anterior teeth and adjusting the lower midline to the left.
  • Class III elastics were used to strengthen anchorage, which can enhance expression rate of lower molar distalization.
  • Expansion and IPR was used to align teeth and adjust the midline. Upper incisors add 4° negative torque to improve upper incisors proclination.

Images

Initial and final

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upper
lower
right
front
left
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upper
lower
right
front
left
InitialFinal
Before picture of treatment
After picture of treatment
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Radiographs

Initial Final
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