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. Product launch Dr. Maurice Salama's interview of Dr. Gerald Niznick Oct.2006