Study of Bone Growth in the Sacroiliac Joint After Minimally Invasive Surgery With Titanium Implants

Inclusion criteria

• . Patient age 21-70 at time of screening.
• . Patient has suspected SI joint pain for greater than or equal to 6 months inadequately responsive to conservative care.
• . Diagnosis of sacroiliac joint dysfunction on one or two sides to be treated on study that is a direct result of sacroiliac joint disruption and/or degenerative sacroiliitis and is based on ALL of the following:
• . Patient has pain at or close to the posterior superior iliac spine (PSIS) with possible radiation into buttocks, posterior thigh or groin and can point with a single finger to the location of pain (Fortin Finger Test) (on any targeted side), and
• . Patient has positive findings on at least 3 physical examination maneuvers that stress the target SI joint(s) and
• . Patient has block on any study targeted side with improvement in SI joint pain numeric rating scale (NRS) at 30 or 60 minutes of at least 50% after injection of local anesthetic into any affected SI joint with an immediate pre-block NRS of at least 5.
• . Baseline Oswestry Disability Index (ODI) score of at least 30%.
• . Baseline (average over the last week) SI joint pain score of at least 50 on 0-100 mm visual analog scale on any side to be treated under the study.

Exclusion criteria