Invisalign is probably the most recognised clear aligner system on the market today due to their ubiquitous marketing and promotion worldwide. According to the company that manufactures them in Mexico, Align Tech, the Invisalign system was first introduced in 1999 and has gone through several improvements and revisions over this time. They also offer an aligner system for teenagers as an alternative to braces although patient compliance with younger “adults” can be an issue.