1982-1990 Core-Vent Corporation: Developed Core-Vent Implant System (1982), Screw-Vent Implant with internal hex-thread connection, (1986) and first Fixture-Mount sterile packaging. Click Here for history slide show. 1991-1997 Core-Vent Bio-Engineering: Manufactured Spectra-System implants in 3 surfaces, acid etched, HA and TPS (distributed by Dentsply). 1997-2001 Paragon Implant Company: Launched tapered Screw-Vent, Advent and SwissPlus implants with double and triple lead threads in SBM/HA surfaces. 2001 Dr. Niznick sold Paragon Implant's business assets and leased his factory to Sulzer Medica (later acquired by Zimmer Dental). 2006 Implant Direct, LLC: Dr. Niznick unveils new "Application Specific Implants" after two years of product development with his former engineers and manufacturing staff at his newly equipped Calabasas factory.