Class I
,
Mandibular retrognathia
,
Deep bite
,
Narrow arches
,
Asymmetric arches
,
Mandibular midline deviation
,
Midline shift
,
Crowding
,
Rotations

Leveling Curve of Spee
,
Retraction
,
First premolar extraction
,
Elastics: Class II
Courtesy of Dr X. Yueqiang, 2022
Before picture of treatment

Treatment Summary

Patient Information

  • Age: 28
  • Gender: female
  • Invisalign Treatment Option: Invisalign Full

Total Treatment Time

  • 20 months

Number of aligners

  • Maxillary: 40 + 21 = 61
  • Mandibulary: 40 + 21 = 61

Aligner Wear time

  • 1-week

Retention

  • Maxillary: Hawley
  • Mandibular: Hawley

Results achieved

  • Class I relationship achieved
  • Functional canine guidance on both sides
  • NormalĀ  overjet and overbite achieved
  • Overjet improved
  • Midlines coincident
  • Curve of Spee leveled
  • Arch form improved

Comments

  • Firstly, the G6 first premolar extraction scheme was used in the upper jaw to maintain the anchorage of the upper posterior teeth. The torque control and vertical control of the upper anterior teeth achieved the desired effect, and the alignment and leveling efficiency was excellent.
  • Secondly, Invisalign appliance has a good effect on the control of dental arch width. In this scheme, the mandibular expansion has not been significantly overcorrected to achieve the effect of matching the upper and lower dental arch width.
  • Third, traditional rectangular attachments were used in the middle segment of the mandibular arch to control the torque and the vertical direction of the lower anterior teeth . The OB of lower anterior teeth were overcorrected to 0 mm, which basically achieved the expectation.

Images

Initial and final

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upper
lower
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front
left
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upper
lower
right
front
left

Progress

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

Initial Final
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