Single Center Study Comparing MOBIS II ST vs MOBIS PEEK

Exclusion Criteria

• •1. The patient has undergone any prior spinal fusion surgery at the proposed treatment level(s).
• •2. The patient has osteoporosis or severe osteopenia as determined by the Investigator. A clinical SCORE calculator may be utilized for females over 40 years of age.
• •3. The patient has grade 2 or higher spondylolisthesis or retrolisthesis at the affected level(s).
• •4. The patient has diffuse multilevel neoplastic disease such that no adjacent normal segments exist for engagement or instrumentation.
• •5. The patient has an active infection.
• •6. The patient is pregnant or is planning on becoming pregnant in the next two years.
• •7. The patient is mentally ill or has a history of drug abuse or severe depression/ psychosocial issues.
• •8. The patient has a known allergy to polyether ether ketone (PEEK), stainless steel or tantalum/titanium.
• •9. The patient is currently enrolled in an investigational spine study.
• •10. The patient has rheumatoid arthritis, ankylosing spondylitis or other autoimmune disease.
• •11. The patient has symptomatic fibrous arachnoiditis