AUSTIN, Texas--(BUSINESS WIRE)--LDR, a privately held company with innovative spinal implants for both non-fusion and fusion applications, has completed enrollment of its single level study for the Mobi-C® cervical artificial disc. LDR was the first company to gain approval for a concurrent one and two-level cervical artificial disc study in the U.S. Surgeons began enrolling patients in April of last year. The company anticipates completing enrollment for the two-level cervical arthroplasty in the next 3 months.