DEERFIELD, Ill., Dec. 17, 2019 (GLOBE NEWSWIRE) — RTI Surgical Holdings, Inc. (Nasdaq: RTIX), a global surgical implant company, today announced the publication of “A Comparative Study of Three Biomaterials in an Ovine Bone Defect Model: A TETRAfuse® PEKK Study” in The Spine Journal1. The study evaluated the in vivo material characteristics of Polyetheretherketone (PEEK), Titanium-coated PEEK …