Upper lingual braces. Animation showing lingual braces fitted to the upper teeth correcting misalignment. Fixed braces consist of metal brackets cemented to each tooth, with an adjustable wire threaded through each bracket. Lingual braces are fitted to the back of the teeth, making them less noticeable.HD master is flattened onto a black background, as seen in this preview. The original file has a transparent alpha channel and is available as the HD master of clip K003 3758.