AUSTIN, Texas--(BUSINESS WIRE)--LDR, a privately held company with innovative spinal implants for both non-fusion and fusion applications, announced enrollment completion for the two-level IDE study on its second generation Mobi-C® cervical artificial disc. LDR began enrolling patients in the first concurrent one and two-level cervical artificial disc study in April of 2006, following nearly two years of clinical experience outside the U.S.