Author/Authors :
Li, Zhujun Department of Orthodontics - School of Stomatology - Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University, Shanghai, China , Chen, Zhengxi Department of Orthodontics - School of Stomatology - Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University, Shanghai, China , Sun, Jian Department of Stomatology - Shanghai East Hospital -Tongji University School of Medicine, Shanghai, China , Yang, Li’an Department of Stomatology - Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine - Shanghai Jiao Tong University, Shanghai, China , Chen, Zhenqi Department of Orthodontics - School of Stomatology - Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University, Shanghai, China
Abstract :
A modified Nance Appliance (MNA) is introduced as a treatment option for an adult class II division 2 malocclusion (CII/2)
patient with deep overbite and dehiscence on the facial root surface of retroclined upper incisors through the cone-beam
computed tomography (CBCT). Indications for this modified MNA as well as a brief description of fabrication procedure and
biomechanical analysis of the treatment effects are shown in detail. Root control and absolute intrusion without enlarging the
bony defect were achieved. The treatment results were satisfying and favorable.
