MIS Sacroiliac Joint Treatment | MIS Sacroiliitis Treatment | SI-BONE

Designed to stabilize and fuse the SI joint

iFuse Implant SizesSI-BONE, Inc. has developed a minimally invasive surgical (MIS), innovative, patented, sacroiliac implant system for sacroiliac (SI) joint conditions including disruptions and degenerative sacroiliitis. The iFuse Implant System® consists of titanium implants and associated surgical instruments.

The iFuse Implant™, available since 2009, is made of titanium and has a porous, titanium plasma spray (TPS) coating. TPS technology has been used for decades in other medical applications such as orthopedics and dentistry. More than thirty published, peer-reviewed articles demonstrate safety and effectiveness of the iFuse Implant.***


The iFuse-3D™ Implant is created with the latest proprietary 3D printing technology. The surface mimics native cancellous bone and uses self-harvesting technology. At the discretion of the surgeon, the implant may be packed with allograft or autograft prior to insertion.


Typically, patients receive three triangular-shaped titanium implants. Available implant lengths range from 30mm to 70mm in 5mm increments. These implants are delivered to the sacroiliac (SI) joint using a cannulated delivery system designed to protect soft tissue. The surgery is performed through a 2-3cm incision.


Potential iFuse benefits

  • Minimally invasive surgical (MIS) approach is less invasive than traditional fusion surgery without extensive soft tissue stripping
  • Triangular implant profile minimizes rotation*
  • An interference fit between the implant and the adjacent osseous walls
  • Porous surface promotes bony ongrowth and ingrowth**
  • iFuse shape and surface are well suited for sacral bone
  • Designed specifically to stabilize and fuse the heavily loaded SI joint
  • Rigid titanium construction and implant geometry provide immediate stabilization 

With the iFuse Implant System, there is no need for:

  • Preparation of the joint prior to implant
  • BMP or autologous bone graft
  • Additional pedicle screws and rods
  • Hollow modular anchorage screws
  • Cannulated compression screws
  • Threaded cages within the joint
  • Fracture fixation screws

Possible benefits versus traditional surgical SI joint fixation

  • Smaller incision size
  • Less soft tissue stripping
  • Minimal tendon irritation

Possible benefits of a minimally invasive surgical procedure

  • MIS procedure with small incision
  • Drill, broach, insert iFuse and close
  • Cannulated delivery system
  • Minimal blood loss


* SI-BONE Test Report 300191
** 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 www.si-bone.com/results

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: www.si-bone.com/risks