Summary

Results achieved

• Class I relationship achieved
• Class I relationship maintained
• Normal  overjet and overbite achieved
• 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 
• All treatment goals were achieved case
• Harmonic arches were achieved

Comments

• For this protrusion profile case, we extracted four 1st premolars to retract the anterior teeth.
• We did maximum anchorage of molars and staging retraction of the anterior teeth.
• For the 1st additional aligner, we uprighted the posterior teeth and used sequential distalization to decrease the overjet and bite settling.
• We also used class II elastic with the Additional Aligners.
• With expansion of both arches, patient's buccal corridor was reduced. The result was a more esthetic smile arch and improved profile.