Invisalign teeth aligner. Animation showing an invisalign teeth aligner correcting the lower teeth. This is an alternative to braces. It is a transparent removable device that fits over the teeth, applying a gentle pressure to them. A series of aligners are used in order to move the teeth to the desired position.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 3763.