At Keystone Spine & Pain Management, we are committed to incorporating the latest evidence-based technologies into our surgical practice. One of the most significant recent advances in spinal fusion surgery has been the development of 3D-printed titanium interbody cages — and we are now routinely using this technology in our fusion procedures.
What Are Interbody Cages?
In spinal fusion surgery, an interbody cage is a device placed into the disc space between two vertebrae after the damaged disc has been removed. The cage serves two purposes: it restores the height of the disc space (relieving pressure on the nerves) and provides a scaffold for new bone to grow through, ultimately fusing the two vertebrae into a single solid segment.
Traditional cages have been made from solid PEEK (a medical-grade polymer) or solid titanium. While these have worked well for decades, 3D-printed titanium represents a meaningful step forward.
Why 3D-Printed Titanium Is Different
3D-printed titanium cages are manufactured using a process called additive manufacturing, in which a laser selectively melts titanium powder layer by layer to build the implant. This process allows for the creation of a porous, trabecular structure that closely mimics the architecture of natural bone.
This matters for several reasons:
- Improved bone ingrowth — The porous surface provides a scaffold that bone cells can grow directly into, rather than growing around a smooth surface. This promotes more robust biological fixation between the implant and the vertebral endplates.
- Optimized porosity — The pore size and interconnectivity can be precisely engineered to match the properties of cancellous bone, encouraging vascular ingrowth and osteoblast activity.
- Increased surface friction — The textured surface resists migration and subsidence (the implant sinking into the vertebral body), providing greater immediate stability.
- Patient-specific customization — 3D printing enables implants to be designed in a wide range of geometries, lordotic angles, and footprints, allowing more precise matching to individual patient anatomy.
What This Means for Patients
For patients undergoing spinal fusion at our practice, 3D-printed titanium cage technology translates to several practical benefits. The improved bone ingrowth properties support higher fusion rates — meaning a greater likelihood that the fusion will heal successfully. The resistance to subsidence means better maintenance of the disc height and nerve decompression we achieve in surgery. And the ability to select from a wider range of implant geometries means we can more precisely restore your spinal alignment.
Technology in spine surgery should always serve a clear clinical purpose. 3D-printed titanium cages aren't novel for novelty's sake — they represent a genuine biomechanical and biological advantage over prior-generation implants.
Our Commitment to Innovation
The adoption of 3D-printed cage technology is part of our broader commitment to patient-specific surgical planning at Keystone Spine. From advanced preoperative imaging and digital templating to intraoperative navigation and implants tailored to individual anatomy, we believe that precision and personalization lead to better outcomes.
If you have questions about the technologies we use in our surgical practice, or if you'd like to discuss whether spinal fusion may be appropriate for your condition, we welcome you to schedule a consultation.