Clinical Data

LOIS 5-year (Whang - MDER 2019)

Long-Term Prospective Clinical And Radiographic Outcomes After Minimally Invasive Lateral Transiliac Sacroiliac Joint Fusion Using Triangular Titanium Implants

 Whang PG, Darr E, Meyer SC, Kovalsky D, Frank C, Lockstadt H, Limoni R, Redmond AJ, Ploska P, Oh M, Chowdhary A, Cher D, Hillen.
Med Devices (Auckl). 2019;12:411-422. [Epub 2019 Sep 26].
DOI: 10.2147/MDER.S219862

PDF to Article Summary


Background: Accumulating evidence supports the long-term safety and effectiveness of minimally invasive sacroiliac joint fusion (SIJF) for sacroiliac joint dysfunction.

Objective: To report 5-year clinical and radiographic follow-up in patients undergoing SIJF using triangular titanium implants (TTI).

Methods: One hundred and three subjects at 12 centers treated with SIJF using TTI in two prospective clinical trials (NCT01640353 and NCT01681004) were enrolled and followed in the current study (NCT02270203) with clinic visits at 3, 4 and 5 years. CT scans performed at 5 years were compared to prior CT scans (at 1 or 2 years) by an independent radiologist.

Results: Compared to baseline scores, SIJ pain scores at 5 years decreased by a mean of 54 points, disability scores (Oswestry Disability Index) decreased by 26 points, and quality of life scores (EuroQOL-5D time trade-off index) increased by 0.29 points (0–1 scale) (all p<0.0001). Satisfaction rates were high and the proportion of subjects taking opioids decreased from 77% at baseline to 41% at 5-year follow-up. Independent radiographic analysis showed a high rate (98%) of bone apposition to implants on both the sacral and iliac sides of the SI joint, with a high rate of bony bridging (87%) and a low rate of radiolucencies suggestive of loosening (5%).

Conclusion: A 5-year follow-up showed continued excellent clinical responses in patients with SIJ pain treated with SIJF using triangular titanium implants along with a high rate (88%) of joint fusion.

Level of Evidence: Level II.

sacroiliac joint pain, sacroiliac joint degeneration, arthrodesis, sacroiliac joint fusion

Author Information

Whang PG - Department of Orthopedics and Rehabilitation, Yale University School of Medicine, New Haven, CT, USA
Darr E - Department of Orthopaedics, Medical University of South Carolina, Charleston, SC, USA
Meyer SC - Columbia Orthopaedic Medical Group, Columbia, MO, USA
Kovalsky D - Orthopaedic Center of Southern Illinois, Mt. Vernon, IL, USA
Frank C - Integrated Spine Care, Wawautosa, WI, USA
Lockstadt H - Bluegrass Orthopedics, Lexington, KY, USA
Limoni R - BayCare Clinic Orthopedics and Sports Medicine, Green Bay, WI, USA
Redmond AJ - Precision Spine Care, Tyler, TX, USA
Ploska P - OrthoSpine Solutions, Stockbridge, GA, USA
Oh M - Department of Neurosurgery, Allegheny General Hospital, Pittsburgh, PA, USA
Chowdhary A - Neuroscience Institute, Overlake Hospital, Bellevue, WA, USA
Cher D - Clinical Affairs, SI-BONE, Inc, Santa Clara, CA, USA
Hillen T - Department of Radiology, Division of Diagnostic Radiology, Musculoskeletal Section, Washington University St. Louis, St. Louis, MO, USA

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