Invisalign® is a new system of straightening teeth without the use of conventional braces. A series of clear plastic aligners are utilized to create tooth movement. Moving teeth with removable aligners is not new. However, the computer program, which can generate a series of aligners with small changes is the new part. Invisalign® is recommended for orthodontic situations with mild to moderate spacing or crowding. They are virtually undetectable, easy to use and comfortable to wear.