Nonsurgical correction of a severe anterior deep overbite accompanied by a gummy smile and posterior scissor bite using a miniscrew-assisted straight-wire technique in an adult high-angle case
Wang Xue Dong, Zhang Jie Ni, Liu Da Wei, Lei Fei Fei, Zhou Yan Heng,
소속 상세정보
( Wang Xue Dong ) - Peking University School and Hospital of Stomatology Department of Orthodontics
( Zhang Jie Ni ) - Peking University School and Hospital of Stomatology Department of Orthodontics
( Liu Da Wei ) - Peking University School and Hospital of Stomatology Department of Orthodontics
( Lei Fei Fei ) - Peking University School and Hospital of Stomatology Department of Orthodontics
( Zhou Yan Heng ) - Peking University School and Hospital of Stomatology Department of Orthodontics
KMID : 0361920160460040253
Abstract
In the present report, we describe the successful use of miniscrews to achieve vertical control in combination with the conventional sliding MBTTM straight-wire technique for the treatment of a 26-year-old Chinese woman with a very high mandibular plane angle, deep overbite, retrognathic mandible with backward rotation, prognathic maxilla, and gummy smile. The patient exhibited skeletal Class II malocclusion. Orthodontic miniscrews were placed in the maxillary anterior and posterior segments to provide rigid anchorage and vertical control through intrusion of the incisors and molars. Intrusion and torque control of the maxillary incisors relieved the deep overbite and corrected the gummy smile, while intrusion of the maxillary molars aided in counterclockwise rotation of the mandibular plane, which consequently resulted in an improved facial profile. After 3.5 years of retention, we observed a stable, well-aligned dentition with ideal intercuspation and more harmonious facial contours. Thus, we were able to achieve a satisfactory occlusion, a significantly improved facial profile, and an attractive smile for this patient. The findings from this case suggest that nonsurgical correction using miniscrew anchorage is an effective approach for camouflage treatment of high-angle cases with skeletal Class II malocclusion.
키워드
High mandibular plane angle; Vertical control; Gummy smile; Orthodontic miniscrew
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