CARLSBAD, Calif., July 18, 2007 (PRIME NEWSWIRE) -- Alphatec Holdings, Inc. (Nasdaq:ATEC), a leading medical device company focused on the design, development, manufacturing and marketing of products for the surgical treatment of spine disorders, will conduct a webcast and conference call with analysts and investors following the release of its second quarter 2007 results on Tuesday, August 7, 2007 at 1:30 p.m. PT / 4:30 p.m. ET.