Align Technology To Hold Conference Call Santa Clara, Calif. - November 13, 2001 -- Align Technology, Inc. (Nasdaq: ALGN), the inventor of the Invisalign^® System, today announced that it will hold a conference call on Wednesday, November 14, 2001 to provide a mid-quarter update on outlook and operations.

Align Technology will host the conference call on Wednesday, November 14, 2001 at 4:30 p.m. EDT, 1:30 p.m. PDT. To access the conference call please dial (415) 904-7372 approximately ten minutes prior to the start of the call and enter reservation number 19989272. If you are unable to listen to the call, a taped replay will also be available beginning approximately one hour after the call's conclusion and will remain available until 6:30 p.m. EDT on November 21, 2001. To access the taped replay, please dial (800) 633-8284 and enter reservation number 19989272. The replay may be accessed from international locations by dialing (858) 812-6440 and using the same reservation number.

Additionally, the conference call will be broadcast live over the Internet and can be accessed through the investor relations portion of Align's website at www.invisalign.com. Please access the website at least fifteen minutes prior to the start of the call to register, download, and install any necessary audio software. An archived webcast replay of the call will also be available at www.invisalign.com.