CARLSBAD, Calif., Jan. 07, 2019 (GLOBE NEWSWIRE) — Alphatec Holdings, Inc. (“ATEC” or “the Company”) (Nasdaq: ATEC) today announced preliminary revenue results for the fourth quarter and full year ended December 31, 2018 and provided revenue guidance for the full year 2019.  The Company also announced that Terry Rich has resigned as President, Chief Operating …