PsiF

Posterior SI Fusion

SI joint pain relief from an implant the size of your pinky finger.

PsiF Product Features

  • One size structural allograft implant (8x10x25mm)

  • Familiar prone patient position

  • Simple posterior approach

  • Tapered nose design for easy insertion

  • Well-designed instrumentation for reproducible results

Resources

PsiF Brochure

PsiF One Pager

Is PsiF Right for Your Patient?

The Fortin Finger Test


To begin diagnosing SI joint dysfunction, the patient must be able to pinpoint the area where the pain originates. This is typically done through the Fortin Finger Test, where the patient points to the PSIS as the most prominent landmark where the pain originates.

It's important to note that while the pain may radiate, it must originate near the PSIS for the test to be positive.

Physical Exam


There must be a positive response on THREE physical examination tests, including:

  • Faber Test

  • Thigh High Thrust Test

  • Distraction Test

  • Gaenslen Test

SI Joint Injections


The injection helps determine if the SI joint is the specific source of your pain. If the steroid injection provides relief, then the SI joint can be confirmed as the source of your pain

  • Two (2) positive Diagnostic SI Joint injections

  • One (1) Therapeutic SI Joint Injection

    • Both showing 75% relief, Duration not specified

  • Do note: Private insurance can vary in requirement for pain relief.

  • ~70% to 80%

Imaging


The patient must have the following imaging:

  • CT or MRI of the lumbar spine including the SI Joint

  • X-RAY of the pelvis and hips

Frequently Asked Questions

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