ALACHUA, Fla., Sept. 12 /PRNewswire-FirstCall/ -- Regeneration Technologies, Inc. (RTI) (Nasdaq: RTIX - News), the Florida-based processor of orthopedic, cardiovascular and other biologic implants, announced today that it has amended its contract with its largest distributor, Medtronic Sofamor Danek USA, Inc. (MSD), dealing with exclusivity provisions, transfer fee structures and intellectual property rights for spinal allograft distribution.