German materials company TANIOBIS is advancing its AMtrinsic powder range for use in additive manufacturing of medical implants, positioning tantalum and niobium alloys as a clinically superior alternative to the titanium standard that still accounts for more than 90 percent of orthopedic and dental implants worldwide.
The Limits of a Long-Standing Standard
Ti-6Al-4V’s mechanical strength and corrosion resistance have supported strong long-term clinical outcomes across decades of use. But its biological performance is not without drawbacks.
In roughly one in five patients, the release of aluminum and vanadium ions triggers cytotoxic reactions, leading to infection and inflammation around the implant site. A separate structural issue compounds this: the alloy is stiffer than natural bone. This mismatch can cause stress shielding, a condition where the implant absorbs load that the surrounding bone would normally bear, potentially leading to bone loss and implant failure over time.
Tantalum and Niobium as Biocompatible Alternatives
Tantalum and niobium offer a different profile. Both metals develop a stable, dense oxide layer on their surface that effectively prevents ion release into surrounding tissue, addressing one of the primary failure modes of Ti-6Al-4V.
Alloys combining titanium, niobium, and tantalum, Ti-Nb-Ta, also exhibit mechanical properties considerably closer to those of natural bone, including higher ductility and elasticity, which reduces the stress shielding risk.
The result is a material class that supports stronger osseointegration, the process by which bone tissue grows into and anchors the implant, while also reducing the likelihood of inflammatory response or rejection. For implants intended to remain in the body permanently, these characteristics represent a meaningful clinical advantage.
3D Printing Unlocks Patient-Specific Design
Additive manufacturing has already established a firm foothold in implant production, with over 10 percent of orthopedic implants now produced using the technology. The process builds components layer by layer from metal powder, fused by laser or electron beam according to a digital model derived directly from a patient’s CT or MRI data. This enables implants to be matched precisely to individual anatomy in ways that conventional manufacturing cannot replicate.
The design flexibility extends to internal structure. Open-porous lattice geometries, with porosity adjustable up to 70 percent, can be built directly into the component, allowing bone tissue to grow into the implant and achieve durable integration. Mechanical properties including elasticity can also be tuned at the design stage to better match the surrounding bone, reducing the biomechanical mismatch that contributes to long-term complications.
TANIOBIS produces the AMtrinsic powder range specifically for these applications. The gas-atomized, spherical tantalum and niobium alloy powders are engineered for consistent flowability and uniform layer formation in powder bed processes, and are compatible with laser beam melting, selective electron beam melting, and laser deposition welding. The combination of material properties and process compatibility positions them for use in implants that must perform reliably across a patient’s lifetime.
The Industry Is Moving Beyond Ti-6Al-4V
Ti-6Al-4V’s dominance in implant manufacturing was never without caveat, its mechanical properties have always been a poor match for natural bone, and its biological limitations have been documented for decades. What is changing now is the pace at which alternatives are reaching clinical and commercial viability, driven largely by additive manufacturing’s ability to process materials that were previously difficult or impossible to fabricate into complex implant geometries.
Two recent examples illustrate how broadly this rethinking is playing out. 3D Systems enabled the world’s first MDR-compliant 3D printed facial implant, produced in PEEK directly within University Hospital Basel for a maxillofacial reconstruction in March 2025, a material chosen precisely because its stiffness more closely resembles bone than titanium alloys.
At the resorbable end of the spectrum, Osteopore partnered with Maastricht University Medical Centre to develop a 3D printed bioresorbable bone implant made from FDA-approved polycaprolactone, designed to gradually degrade in the body and eliminate the need for follow-up removal surgery.
These projects point in the same direction: the next generation of implants is being defined by a material that best matches what the body actually needs, in mechanical behavior, biological response, and long-term integration. Tantalum and niobium alloys, processable through additive manufacturing into patient-specific porous structures, are increasingly positioned to meet those criteria for permanent load-bearing applications.
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Featured image shows AMtrinsic powders used for implants. Photo via TANIOBIS.
