AUSTIN, Texas--(BUSINESS WIRE)--LDR, a privately held company with innovative spinal implants for both non-fusion and fusion applications, reached the critical 24-month follow-up phase for the one-level IDE study on its second generation Mobi-C® cervical artificial disc. LDR is the first and currently the only company to have completed enrollment for a concurrent one-level and two-level cervical artificial disc replacement study. LDR completed 1-Level enrollment in October 2007 and 2-Level enrollment in March 2008. The 24-month follow-up phase of the two-level arm of the study is slated to be completed in March 2010.