DECEMBER 5, 2024
EDMOND, Okla.—Sacroiliac (SI) joint fusion surgery could be improved by using a device that stabilizes the joint and prepares it for fusion.
In data published in Medical Devices: Evidence and Research, investigators from Clinical Radiology of Oklahoma found the Nevro1 (Nevro Corp.) device utilizes a posterior integrated transfixation cage system to achieve this dual action.
“The Nevro1 device is a cutting-edge single implant designed to provide immediate joint
EDMOND, Okla.—Sacroiliac (SI) joint fusion surgery could be improved by using a device that stabilizes the joint and prepares it for fusion.
In data published in Medical Devices: Evidence and Research, investigators from Clinical Radiology of Oklahoma found the Nevro1 (Nevro Corp.) device utilizes a posterior integrated transfixation cage system to achieve this dual action.
“The Nevro1 device is a cutting-edge single implant designed to provide immediate joint stabilization and support long-term fusion by thoroughly preparing the joint using a posterior approach directly into the joint,” explained Douglas Beall, MD, the chief of services, comprehensive specialty care, at Clinical Radiology of Oklahoma.
Earlier technology for transfixing the SI joint often required placing implants across the joint using a lateral approach, which crossed the entire hip bone. Then a lateral triangular rod system was used to prepare the joint for fusion.
In the study, researchers compared the two approaches in 12 cadaveric specimens. Nevro1 produced more motion reduction than the posterolateral implant in flexion-extension, and axial rotation, and more reduction in axial rotation than the lateral implants (6%±3% vs. 37%±10% and 33%±11%, respectively; P<0.05).
Surgery using the Nevro1 device removed 22% to 60% less bone volume from the sacrum and ilium (P<0.10), introduced 200% to 270% more implant surface to the joint space (P<0.01), and decorticated 75% to 375% more joint surface area (P<0.01) than the posterior and lateral implants approach.
The Nevro1 features self-contained deployable titanium anchors that secure the sacrum and ilium to enhance both axial and rotational joint stability. Its 3D-printed surface technology accelerates bone growth and cellular adhesion compared with smooth surfaces, leading to an improved postoperative course.
These performance enhancements led Beall to conclude, “The Nevro1 provides a significantly better opportunity for robust arthrodesis of the sacroiliac joint, leading to potential pain relief.”
—Myles Starr
Beall is a consultant to Nevro.
