Two-Year Outcomes of Lateral Transiliac Sacroiliac Joint Fusion with Porous Threaded Implant.

PURPOSE: Sacroiliac joint (SIJ) pain is a widely recognized source of chronic low back pain. The safety and effectiveness of SIJ fusion is supported by multiple systematic reviews. Most evidence involves lateral transiliac placement of metallic implants. We report two-year outcomes from lateral SIJ fusion using a 3D-printed porous threaded fusion implant (PTI, iFuse TORQ, SI-BONE).

PATIENTS AND

METHODS

A retrospective chart review was undertaken at two centers. Medical records of patients who underwent lateral SIJ fusion between January 2022 and May 2023 with at least two years of follow up were reviewed. Data collection included demographics, complications, and postoperative outcomes. The study protocol was reviewed by WCG IRB and was granted exemption authorization.

RESULTS

49 patients underwent surgery and had two-year outcomes. Mean age was 63.8 and 71% were women. There were no device- or procedure-related adverse events. Pain scores averaged 8.7 at baseline and 2.8 at follow-up (change of 5.8 points, p<0.0001). Pain score improvements were similar across surgeons and were independent of a history of prior lumbar fusion.

CONCLUSION

In our case series, lateral SIJ fusion with a titanium 3D printed threaded implant was safe and effective at 2 years of follow-up. No implant breakage or migration was observed. Outcomes were consistent with existing studies.