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A preliminary report of a new design of cast metal fixed twin-block appliance

Department of Orthodontics, Graduate School of Dental sciences, Tongji University, Shanghai, China

Z. R. Tan, H. He, D. Pan and S. J. Yeweng

Department of Orthodontics and Ministry of Education Key Lab for Oral Biomedical Engineering, School of Stomatology, Wuhan University, Wuhan, China

Address for correspondence: Sanjie Yeweng, Department of Orthodontics and Ministry of Education Key Lab for Oral Biomedical Engineering, School of Stomatology, Wuhan University, 237 Luoyu Road, Hongshan District, Wuhan 430079, China., Email: ywsj88{at}hotmail.com

	Abstract

The present paper describes a cast metal fixed twin-block appliance utilized to correct a Class II malocclusion, which is designed for full-time wear. The object of the present paper is to achieve rapid functional correction of Class II malocclusions by transmitting favourable occlusal forces to inclined planes which are cemented to the posterior teeth. In the meantime, pre-adjusted fixed edgewise appliances can be placed on the anterior teeth to correct their malpositions. This new functional appliance design may shorten the total treatment duration and reduce the need for patient compliance.

Key words: Class II malocclusion, fixed functional appliance, twin-block appliance, Herbst appliance