Please assess the completion status of the following clinical trial:

Trial Title: Evaluation of Fusion Rate Using K2M VESUVIUS® Demineralized Fibers With K2M EVEREST® Spinal System

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: COHORT
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* Diagnosis of non-cervical spinal stenosis; spondylolisthesis (grade 1 or 2); and/or degenerative disc disease (DDD) with one or two contiguous levels requiring surgical intervention between L1-S1. Qualified patients will be confirmed for inclusion by patient history and radiographic studies~* Willing and able to comply with the requirements of the protocol including follow-up requirements~* Willing and able to sign a study specific informed consent~* Skeletally mature and I 18 years old at time of enrollment~Exclusion Criteria:~* Previous spine surgery at the index level~* Previous posterior spine surgery (e.g., posterior decompression) that destabilizes the lumbar spine~* Active systemic infection or infection at the operative site~* Co-morbid medical conditions of the spine or upper/lower extremities that may affect the lumbar spine neurological and/or pain assessment~* Metabolic bone disease such as osteoporosis and osteopenia that contradicts spinal surgery~* History of an osteoporotic fracture~* History of an endocrine or metabolic disorder (e.g., Paget's disease) known to affect bone and mineral metabolism~* Taking medications that may interfere with bony/soft tissue healing including chronic steroid use~* Known allergy to titanium or cobalt chrome~* Rheumatoid arthritis or other autoimmune disease or a systemic disorder such as HIV, active hepatitis B or C, or fibromyalgia~* Insulin-dependent type 1 or type 2 diabetes~* Medical condition (e.g., unstable cardiac disease, cancer) that may result in patient death or have an effect on outcomes prior to study completion~* Pregnant, or intends to become pregnant, during the course of the study~* Severe obesity (Body Mass Index \> 40)~* Physical or mental condition (e.g., psychiatric disorder, senile dementia, Alzheimer's disease, alcohol or drug addiction) that would interfere with patient self-assessment of function, pain, or quality of life.~* Involved in current or pending spinal litigation where permanent disability benefits are being sought~* Incarcerated at the time of study enrollment~* Current participation in an investigational study that may impact study outcomes

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Based on this trial design, predict the completion outcome and termination type (if applicable).