Take your life back from chronic SI joint pain.

Learn if Unio™ SI joint stabilization is right for you.

Our mission is to provide a solution to achieving superior patient outcomes so people can get back to being themselves and doing the activities they love.

Unio™ SI Joint Stabilization Procedure

About your SI Joint

The two sacroiliac (SI) joints provide support and stability and play a major role in absorbing impact when walking and lifting.

Strong ligaments and muscles support the SI joints and there is a very small amount of motion in the joint for normal body flexibility. As we age and our bones become arthritic, ligaments stiffen (or loosen), cartilage wears down and bones may rub together causing pain. In addition to age, SI joint pain can occur as the result of a fall, work injury, car accident, pregnancy and childbirth, or as a result of hip or spine surgery. Furthermore, scientific data shows pain from the SI joint can feel like disc or lower back pain.1 For this reason, SI joint disorders should always be considered in lower back pain diagnosis.

Consult your doctor to help distinguish if pain is from spinal disorders or SI joint dysfunction.

Are you experiencing any of the following symptoms?

  • Dull, aching lower back pain that can range from mild to severe

  • Pain in lower back, buttocks, groin, or down the leg similar to sciatica

  • Stiffness and reduced range-of-motion

  • Numbness or tingling in legs

  • Pain climbing stairs or jogging

  • Difficulty moving from sitting to standing or bending at the waist

  • While sitting or standing, shifting weight from one side to the other relieves your back pain


Do You Have Sacroiliac Joint Dysfunction?

The SI joints are located between the iliac bones and the sacrum, connecting the spine to the hips. 

Sacroiliac (SI) joint dysfunction is a condition where the strong ligaments and muscles that support the SI Joint are no longer able to properly do so. This may be a result of injury to the joint or ligaments, prior pregnancy(ies), previous spinal surgery, or natural degeneration due to aging.

Making a Diagnosis

The following tests should be performed to make a complete diagnosis:

  • The Fortin Test

  • Distraction, Thigh Thrust, FABER, Compression, Gaenslen’s (3 of 5 must
    be positive)

  • X-ray, CT, or MRI completed

  • Diagnostic Injection(s)

  • Therapeutic Injection(s)

If you have undergone the following treatments:

  • Physical Therapy

  • Therapeutic Massages

  • Pain medications

  • Back and SI Joint Braces

  • Steroid / Corticosteroid Injections

…with no reduction in your pain, Unio™ may be your next step!

Unio SI Joint Stabilization

The Unio™ System is a minimally invasive procedure that aims to fuse the SI Joint by stabilizing it. The procedure is done through a small incision (about 5/8in or 16mm) and typically takes less than an hour. 

Unio™ uses a dense cortical bone allograft that is placed directly into the dysfunctional SI Joint. This allograft is a natural material with a larger footprint that enhances bone fusion.


Advantages of the Unio™ SI Joint Stabilization System include:

  • Minimally invasive—minimal blood loss and muscle disruption

  • 5/8in (16mm) incision

  • Short Outpatient Procedure—you can go home same day

  • Quick recovery time—resume activity in a
    few weeks

  • No metal implanted

SI Joint Dysfunction may be difficult to diagnose due to the similar pain patterns as lumbar stenosis, herniated discs, nerve damage, or hip-related issues. 


25% of patients presenting with low back pain have SI Joint dysfunction. 2


Up to 75% of postoperative lumbar fusion patients will develop significant SI joint degeneration after 5 years. 3


30% of patients that underwent a hip replacement showed functional impairment of one SI Joint. 4


If you have had any of the following therapies and are still experiencing back pain, ask your physician if Unio™ is right for you.

  • Lumbar Fusion

  • Spinal Cord Stimulator (SCS)

  • Hip Replacement

  • IDD Therapy

Get in touch with a representative.