Align Technology, Inc. Announces Date of Its First Quarter 2004 Financial Results Conference Call SANTA CLARA, Calif., April 1 /PRNewswire-FirstCall/ -- Align Technology, Inc. (Nasdaq: ALGN), the inventor of Invisalign®, a proprietary method of straightening teeth without wires and brackets, today announced plans to release its first quarter 2004 financial results before the market opens on Thursday, April 22, 2004. The release will be available on the Investor Relations section of the company's web site at www.invisalign.com.

On Thursday, April 22, 2004 at 10:00 a.m. EDT (7:00 a.m. PDT), Thomas M. Prescott, President and Chief Executive Officer, and Eldon M. Bullington, Chief Financial Officer, will host a conference call and web cast to review first quarter 2004 financial results.

To access the web cast, go to "Conference Calls" in the Investor Relations section of Align Technology's website at http://www.invisalign.com/US/html/corporate/investor_frameset.html . To access the conference call, please dial 646-862-1080 approximately ten minutes prior to the start of the call. If you are unable to listen to the call, an archived web cast will be available beginning approximately one hour after the call's conclusion and will remain available through 5:30 p.m. EDT on April 21, 2005. Additionally, a telephonic replay of the call can be accessed by dialing 800-633-8284 with reservation number 21190896. The replay may be accessed from international locations by dialing 402-977-9140 and using the same reservation number. The telephonic replay will be available through 5:30 p.m. EDT on May 6, 2004.

About Align Technology, Inc.

Align Technology designs, manufactures and markets Invisalign, a proprietary method for treating malocclusion, or the misalignment of teeth. Invisalign corrects malocclusion using a series of clear, nearly invisible, removable appliances that gently move teeth to a desired final position. Because it does not rely on the use of metal or ceramic brackets and wires, Invisalign significantly reduces the aesthetic and other limitations associated with braces. Invisalign is appropriate for treating adults and older teens. Align Technology was founded in March 1997 and received FDA clearance to market Invisalign in 1998.

To learn more about Invisalign or to find a certified Invisalign doctor, please visit www.invisalign.com or call 1-800-INVISIBLE.

Investor Relations Contact:
Barbara Domingo
Align Technology, Inc.
408-470-1204
bdomingo@aligntech.com
Press Contact:
Shannon Henderson
Ethos Communications, Inc.
678-417-1767
shannon@ethoscommunication.com

SOURCE Align Technology, Inc.

CONTACT: investors, Barbara Domingo of Align Technology, Inc., +1-408-470-1204, or bdomingo@aligntech.com; or press, Shannon Henderson of Ethos Communications, Inc., +1-678-417-1767, or shannon@ethoscommunication.com, for Align Technology, Inc.