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Main Instructor Chun-Liang Kuo
Department / Institution Department of Orthodontics, Chi Mei Medical Center, Tainan City, Taiwan
Classification Case report
Objective: To evaluate the management of skeletal Class II division 1 malocclusion in a non-growing patient with extraction of upper first premolars.
A 16-year-old female patient presented for the problem of her protruded upper incisors. Clinical and cephalometric examination revealed skeletal Class II relationship with mandible retrusion, average mandibular plane angle, severe maxillary incisor proclination, convex profile, protruded lips, large overjet and deep bite. Treatment modalities were extraction of bilateral maxillary first premolar to retract upper anterior teeth and the light class II elastics for mesial movement of mandibular teeth. Following treatment, great improvement in patient’s facial profile, bilateral canine class I, normal overjet & overbite were achieved.
Discussion and summary 
Class II malocclusions can be treated by several strategies, according to the characteristics associated with the problem, such as age, vertical growth pattern, anteroposterior discrepancy, U1 and L1 inclinations and dental arch space deficiency, etc. Methods include functional appliances and fixed appliances associated with Class II elastics. In non-growing patients, methods include orthognathic surgery or selective removal of permanent teeth, with subsequent dental camouflage to mask the skeletal discrepancy. Angle's class II division 1 malocclusions exhibit various morphological characteristics. We should take into careful consideration the above for satisfactory results.
Orthodontic Treatment of Class II Division 1 Malocclusion with Large Overjet in A Non-growing Patient : A Case Report