SI Joint Fusion with the iFuse Implant System - How iFuse Works | SI-BONE

SI Joint Fusion with the iFuse Implant System®

The iFuse Implant System is intended for sacroiliac fusion for conditions including sacroiliac joint dysfunction that is a direct result of sacroiliac joint disruption and degenerative sacroiliitis. This includes conditions whose symptoms began during pregnancy or in the peripartum period and have persisted postpartum for more than 6 months. There are potential risks associated with the iFuse Implant System. It may not be appropriate for all patients and all patients may not benefit. For information about the risks, visit:

Sacroiliac (SI) joint fusion is a surgical procedure performed in an operating room, with either general or spinal anesthesia. You will be lying down during the surgery while your surgeon uses a specially designed system to guide the instruments that prepare the bone and insert the implants. Both the surgical technique and the iFuse Implant System are designed to offer the maximum protection to your surrounding tissues.

The entire procedure is performed through a small incision (approximately 2-3cm long), along the side of your buttock. During the procedure, fluoroscopy provides your surgeon with live imaging during the procedure to facilitate proper placement of the implants. Fluoroscopy is an imaging technique commonly used by physicians to obtain real-time moving images of internal structures using X-rays. Normally three implants will be used, depending on your size.

The procedure takes approximately an hour. Your surgeon will decide when you can return home based on your postsurgical status.

Following the Surgery

At discharge, your surgeon will arrange follow-up visits to assess your progress, health status (including the status of your incision) and may take additional images of your surgical site. Your doctor will advise you when it is appropriate to resume your daily activities and weight bearing. Return to work will depend on your postsurgical progress and occupation.

iFuse Implant System ImplantsiFuse Benefits

  • Minimally invasive surgical (MIS) approach is less invasive than traditional SI joint surgery
  • Triangular implant profile minimizes rotation and an interference fit minimizes micromotion
  • Porous surface promotes bony ongrowth and ingrowth*
  • Designed specifically to stabilize and fuse the heavily loaded SI joint
  • Rigid titanium construction and implant geometry provide immediate stabilization
  • More than thirty published, peer-reviewed articles demonstrate safety and effectiveness of the iFuse Implant.**

Possible benefits of an MIS procedure may include:

  • Smaller incision
  • Reduced blood loss
  • Decreased OR time

Possible benefits versus traditional SI joint fusion

  • Smaller incision size
  • No need for bone grafting
  • Less soft tissue stripping
  • Minimal tendon irritation


* MacBarb, et al., “Fortifying the Bone-Implant Interface Part II: An In Vivo Evaluation of 3D-Printed and TPS-Coated Triangular Implants,” Int J Spine Surg, 2017; 11.
** Polly, D.W. et al., Neurosurgery. 2015.— Dr. Polly is an investigator on a clinical research study sponsored by SI-BONE. He has no financial interest in SI-BONE. Research was funded by SI-BONE, Inc. A list of additional published studies is available at


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