Facet Wedge Post Market Study

Inclusion Criteria: 1. Subjects diagnosed with at least one of the following: * Degenerative Disc Disease (DDD); * Degenerative facet joint disease (isolated facet based symptomatic back pain); * Pseudoarthrosis post anterior instrumentation; 2. Subjects who are a fusion candidate for single or multiple levels fusion between L1-S1; 3. Subjects, who, in the opinion of the Investigator, are able to understand this clinical investigation, co-operate with the investigational procedures and are willing to return to the hospital for all the required post-operative follow-ups. Exclusion Criteria: Preoperative exclusion criteria: 1. Segmental instability of the index level in case of planned stand-alone FACET WEDGE usage; 2. Unilateral application , except in combination with pediclescrew fixation on the contralateral side; 3. Compromised facets due to decompression techniques; 4. Spondylolisthesis; 5. Fracture or other instabilities of the posterior elements; 6. Tumor; 7. Acute or chronic systemic or localized spinal infections; 8. Nursing mothers or women who are pregnant or plan to become pregnant during the time of the study; 9. Subjects aged below 18 years; 10. Subjects who, in the opinion of the Investigator, have an existing condition that would compromise their participation and follow-up in this clinical investigation; Intraoperative exclusion criteria: 11. Intraoperative decision to use implants other than the device under investigation.