CARLSBAD, Calif., May 06, 2019 (GLOBE NEWSWIRE) — Alphatec Holdings, Inc. (“ATEC” or the “Company”) (Nasdaq: ATEC), a medical device company dedicated to revolutionizing the approach to spine surgery, announced today the commercial releases of its PLIF IdentiTi-PS Porous Titanium Interbody Implant System for Posterior Lumbar Interbody Fusion Procedures (PLIFs) and its AlphaGRAFT Demineralized Bone …