Invisalign is a new system of straitning teeth without the use of conventional braces. A series of clear plastic aligners are utilizedto create tooth movement. Moving teeth with in removable alingers are notnew. 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.