Retrospective Study With Patients Treated With STALIF® C or M and Ti or FLX Implants for 1 and 2 Levels

Multicenter, Retrospective, Observational Clinical Study to Evaluate Clinical Outcome Measures and Safety Profiles for Patients With SDDD Treated With STALIF® C, or M, Ti or FLX Implants for 1 and 2 Levels.

This is a Retrospective, Observational Multi-Center study, utilizing patients diagnosed with up to a Grade1 spondylolisthesis or retrolisthesis or symptomatic degenerative disc disease and treated with STALIF® C, or M, Ti and/or FLX implants at one or two levels.

The study is intended to codify the performance of the STALIF family of products. Its design is to provide retrospective data derived from the patient's medical and surgical chart and prospectively assess the treating surgeon and patient on their level of satisfaction post-operative up to present.

All subjects who sign an informed consent will be included in the prospective data collection via chart review at the individual investigational sites. The prospective data will come from subjects who complete the designated patient assessments as well as the treating surgeon. The data collection period will include surgeries performed between 2014 to present.

The analysis will support the safety profile of the product family and allow for comparison to the available literature as well as between device types (Ti versus FLX). Furthermore, data from this study will support post-market surveillance requirements for the STALIF family of products.

Inclusion Criteria:

• Diagnosed with up to a Grade1 spondylolisthesis or retrolisthesis or degenerative disc disease of the cervical or lumbar spine at time of surgery.

• 2 levels, between:

  • C: C2-T1 (neck)
  • M: L2-S1 (low back)

• Skeletally mature at the time of surgery with clinical and radiological evidence of degenerative disc disease of the cervical or lumbar spine.

Exclusion Criteria:

• Subject who had surgery with the STALIF devices at more than 2-levels.
• In the Investigator's opinion, the subject diagnosed with a disease or condition, which precludes the possibility of healing at the time of surgery