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Main Instructor 曾于娟
Department / Institution Department of Orthodontics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan. (高雄醫學大學附設醫院齒顎矯正科)
Classification Case report
Clinical characteristics of Class II division 1 malocclusion include excessive overjet, extremely labial-everted maxillary incisors, lingual-tipping and usually over-erupted mandibular incisors. In treating non-growing patient with severe Class II division 1 malocclusion, camouflage treatment with extraction and temporary anchorage device (TADs) is common. However, if patient still have growth potential, headgear may facilitate mandibular growth and decrease the difficulty of orthodontic treatment.
An 11 year-old female whose chief complaint was protrusive upper anterior teeth and upper lips. By clinical examination and cephalometric analysis, she was diagnosis as skeletal Class I, hypodivergent facial pattern and Angle’s Class II division 1 malocclusion with 9mm overjet and impinging deep-bite. Our treatment plan was non-extraction orthodontic treatment by fixed edgewise appliance with the aid of headgear to retract the protrusive upper anterior teeth.
Class I occlusion with acceptable overjet, overbite and well-aligned dentition were achieved. Not only retraction of upper anterior teeth but also growth of mandible makes the profile more harmonious.
In treating growing patients, the treatment plan is usually more conservative. However, if we choose non-extract orthodontic treatment, in order to improve the overjet, facilitating mandibular growth or distalization will be needed. Headgear is one of the appliance would meet the two condition aforementioned.
In this case, we will present the treatment progress, outcome and comparison by extra-oral anchorage to obtain proper treatment result of a Class II division 1 patient.
Non-extraction Orthodontic Treatment of Class II Division 1 Malocclusion with The Aid of Headgear: A Aase Report.