A lingual orthodontic appliance contains a lingual bracket (12) for an anterior tooth and an archwire (20). The orthodontic appliance is defined in a three-dimensional Cartesian coordinate system. The archwire (20) extends in a first and a second dimension of the coordinate system generally U-shaped. In the third dimension the archwire (20) is generally flat. The archwire (20) has a rectangular cross-section with a height defined by the longer side of the rectangular cross-section. The height is oriented along the third dimension. The bracket further has a bracket pad (2) and a bracket body (1). The bracket body (1) forms a slot (4) for receiving the archwire (20). The slot (4) is formed by at least two opposing parallel slot side faces and a slot ground face arranged perpendicular thereto. The slot (4) has a width defined by the distance between the slot side faces. The width matches with the height of the archwire (20). The invention is advantageous for an orthodontic treatment of teeth requiring good tip and rotation control.
