Physiologic Anchorage Spee's-wire System Used In Adult Patient With Angle Class ? Malocclusion: A Case Report

Objective:To investigate the outcome of treatment in an adult patient with Angle class?malocclusion using the PASS technique.Materials and methods:A 22 years old female patient with class ? malocclusion was selected from Dalian Ortho Clinic in July 2013.This patient had no facial asymmetry and no gummy smile.She also had convex profile and high angle.The patient had Class ? skeletal pattern with normal maxilla and prognathic mandible.The upper mid-line was normal and the lower one shifted to the left by about 1.5mm.The maxillary and mandibular arches had no crowding.Reverse overjet and overbite.The patient extracted all third molars and was treated with PASS technique.Results:The orthodontic course lasted 14 months.Molar relationship was corrected.Normal overbite and overjet were achieved.The med-line was also corrected.Pre-treatment and post-treatment results were compared:FMA and MP-SN increased by 2°.SNB decreased by 3°,AO-BO increased by 4.5mm,class ?relationship had been corrected.Z angle changed form 61°to 65°and the soft tissue profile was improved.According to the Pitchfork Analysis,the mandible had been distally moved by 1.5mmand lower molars were 3mm distally moved.The upper insiors were flared by 3.5mm and the lower ones were uprighted by 1mm.Conclusion:Adult patients with Class ? malocclusions can be treated successfully by using the Pass technology without using any extra affiliated anchorage enhancement appliances.