Evaluate Effectiveness of the Biomet Lumbar Spinal Fusion System

All subjects enrolled in this study will receive the The Biomet Osteobiologic Treatment System which is comprised of the SpF® Spine Fusion Stimulator and any or all of the following can be utilized in the study: any Pedicle Screw System, autograft and an Interbody Spacer

Inclusion criteria

• The subject must, in the investigator's opinion, be psychosocially, mentally, and physically able to fully comply with this protocol including the required follow-up visits, the filling out of required forms, and have the ability to understand and give written informed consent.
• The subject must be diagnosed with degenerative disc disease at up to 2 levels from L2-S1 inclusive and undergoing up to 2 level posterior lumbar spinal fusion surgery with or without anterior column fusion.
• Subjects must be between 18 and 75 years of age.
• The patient must be skeletally mature (epiphyses closed).

Exclusion criteria

• Subject is pregnant, lactating or interested in becoming pregnant during the duration of the study.
• Any active litigation.
• Subject is currently involved in another investigational study.
• Subject has a history (present or past) of substance abuse (recreational drugs, prescription drugs or alcohol) that in the investigator's opinion may interfere with protocol assessments and/or with the subject's ability to complete the protocol required follow-up.
• Subject is incarcerated.
• More than 2 prior spine surgeries/revision surgeries or any previous spinal fusions at levels being currently treated.
• Traumatic instability.
• Any parathyroid or metabolic bone disease.
• Any active malignancy.
• Osteopenia/Osteoporosis - All subjects will be screened for osteoporosis using SCORE (Simple Calculated Osteoporosis Risk Estimation) with a threshold value of 6. All subjects with a SCORE value greater than 6 will be referred for Dual-energy X-ray absorptiometry (DEXA) Scan. Subjects with a T-Score of £-1-2.5 will be excluded.