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Class II div 1, Posterior crossbite, Increased overjet, Deep bite, Asymmetric arches, Mandibular midline deviation, Crowding, Rotations

 
Distalisation, Mesialisation, Levelling Curve of Spee, Intrusion, Retraction, Second premolar extraction, Space Closure, Elastics: Class II
 

Courtesy of Dr. X. Zhang, 2019

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Treatment Summary

Patient Information
  • Age: 18
  • Gender: female
  • Invisalign Treatment Option: Invisalign Teen
Total Treatment Time
  • 34 months
Number of aligners
  •  Maxillary: 60 + 15 = 75
  •  Mandibulary: 49 + 15 = 64
Aligner Wear time
  •  2-weeks
Retention
  •  Maxillary: Other
  •  Mandibular: Other
Results achieved
  • Class I relationship achieved
  • Functional canine guidance on both sides
  • Posterior crossbite corrected
  • Normal overjet and overbite achieved
  • Deep bite improved
  • Overjet improved
  • Midlines coincident
  • Curve of Spee levelled
  • Arches aligned and coordinated
  • Alignment of both arches through derotation
  • Arch form improved
  • Aesthetic smile line was achieved
  • All treatment goals were achieved case
  • Harmonic arches were achieved
Comments
  • To correct the dental class II relationship, we distalised the upper molars to simultaneously correct the molar crossbite.
  • Class II elastics were used in all stages of the treatment to offer anchorage for upper distalisation and assistance of lower molar mesialisation.
  • We placed buttons on the lingual surfaces of teeth 1.4, 2.4, 3.7 and 4.7 after aligner 25 to help correct the rotation of teeth 1.4 and 2.4.

Initial

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Final

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Other Cases

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Crossbite
Courtesy of Dr. E. Rothier, 2017

Class I, Posterior crossbite, Anterior crossbite, Narrow arches, Crowding, Rotations
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Crossbite
Courtesy of Dr. Samoto, 2013

Class III, Anterior crossbite, Midline shift, Crowding

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