Advanced wrist osteoarthritis, its causes (the aftermath of a sprain or fracture) and its symptoms, are described on a dedicated page. This page covers one specific surgical option that is still little known: the pyrocarbon capitate implant. It explains what it does, who it is for, and why its value comes down to a single idea — relieve pain without fusing.
Where this osteoarthritis comes from, and why it is unusual
Wrist osteoarthritis is rarely “spontaneous.” It most often follows an old injury that healed poorly:
A severe sprain (SLAC)
A sprain that tears the ligament between two key bones (the scaphoid and lunate), throwing the wrist out of alignment and wearing it down over time — a process known as SLAC.
A scaphoid fracture that never healed (SNAC)
A scaphoid nonunion, which leads to comparable wear — SNAC.
Death of a carpal bone (Kienböck's disease)
Another gateway to wrist osteoarthritis.
Wrist chondrocalcinosis (SCAC)
Comparable wear, but involving several compartments of the wrist, and at a different age (over 55). This is SCAC.
These situations share one thing: the wear first concentrates on the upper row of the small wrist bones, while the central bone, the capitate, is often still usable — which is the logic behind the treatment.
The basic procedure: removing the worn-out row
The standard surgery for this kind of osteoarthritis is proximal row carpectomy. The three small bones of the upper row of the wrist — the most damaged ones — are removed. The wrist then reorganizes around the capitate, the central bone of the second row, which articulates directly in the socket of the forearm bone (the radius). The main advantage of this procedure: it removes the worn surfaces while keeping the wrist mobile, unlike fusion.
One limitation of this procedure. For the result to last, the head of the capitate, now bearing the load, needs good-quality cartilage. If that cartilage is already damaged, the direct bone-on-bone contact can become painful again over time — which used to rule out this option for some patients. It is precisely this limitation that the pyrocarbon implant overcomes.
What the pyrocarbon implant adds
Why pyrocarbon
A material close to bone. Pyrocarbon has an elasticity close to that of bone, which lets it transmit forces without damaging the surfaces it meets, and it is highly wear-resistant.
A cap, not a full replacement. The implant does not replace the whole joint: it resurfaces the head of the capitate, like a small cap that restores a quality bearing surface.
The benefit: broadening the indications. By correcting the weak point of the resection (poor cartilage), the implant makes it possible to offer a motion-preserving option to patients who would otherwise have needed a fusion.
The idea is simple and elegant: rather than letting the capitate bear the load on imperfect cartilage, it is capped with a small implant that gives it a smooth, even, and durable surface.
The guiding idea: relieve without fusing
To understand the value of this technique, it has to be set against its main alternative — arthrodesis, which fuses the wrist.
Fusing (arthrodesis)
Fusing the wrist relieves pain very reliably, but at the cost of movement: the wrist no longer moves. It is an excellent solution when mobility can no longer be recovered or is not a priority.
Preserving movement (resection ± implant)
The resection, extended if needed by the pyrocarbon implant, aims to relieve pain while keeping a wrist that moves — a valuable compromise for active patients or those whose work demands mobility.
Neither is “the” right choice in the abstract: it depends on functional needs, age, occupation, and the condition of the surfaces.
What to expect — and the caveats
Published series report favorable results, which should be presented as trends, not guarantees:
Good pain relief and improved grip strength and mobility compared with before surgery.
A return to work is possible for most working patients, often within a few months.
A realistic goal: clear improvement, not a normal wrist.
This is a salvage technique — specialized and selective, not a first-line treatment: it is for advanced osteoarthritis, after conservative treatments have failed.
The level of evidence remains moderate: the data come from case series, without a large comparative trial over the very long term. The implant is a promising option, and follow-up data continue to build.
Like any implant, it carries its own risks (displacement, the possible need for revision) and is not indicated for every pattern of wear.
After the operation
Recovery takes 12 to 18 months, as with any carpal surgery.
A splint is worn for 3 to 6 weeks, depending on the condition of the wrist ligaments.
Rehabilitation (physical therapy) is then carried out for at least 12 months.
Over the years, the implant “carves” its own seat into the radius facing it.
Pain persists for several months and gradually fades.
Key takeaways
These takeaways capture the spirit of the technique: relieving a worn wrist without fusing it, when conditions allow.
Frequently asked questions
Glossary
The central bone of the wrist (second row); becomes the main load-bearing point after the upper row is removed.
Removal of the three worn bones of the upper row of the wrist, preserving mobility.
A small pyrocarbon cap placed on the capitate to give it a smooth bearing surface.
A biomaterial with elasticity close to bone, wear-resistant, used for hand implants.
Wrist wear following a scapholunate sprain (SLAC) or a scaphoid fracture that never healed (SNAC).
Surgical fusion of the wrist: very reliable for pain, but with no mobility.
References
The evidence behind the facts presented here.
Pyrocarbon capitate resurfacing implant combined with proximal row carpectomy for advanced wrist osteoarthritis. Orthop Traumatol Surg Res, 2025 — combining proximal row carpectomy with the RCPI broadens the indications for resection; favorable results for pain, strength, and mobility; return to work for most working patients.
The use of resurfacing capitate pyrocarbon implants (RCPI) in chronic diseases of the wrist: outcomes of more than 100 cases. Musculoskeletal Surgery, 2023 — a series of 112 patients, mean follow-up 6.6 years: marked reduction in pain, gains in strength and range of motion.
Resurfacing capitate pyrocarbon implant as salvage procedure in carpal injuries — an implant designed to accompany resection in SLAC/SNAC osteoarthritis and Kienböck's disease; pyrocarbon material.
Comparison of proximal row carpectomy + RCPI versus Eaton capsular interposition. Orthop Traumatol Surg Res, 2024 — a comparison of motion-preserving strategies (independent authors).
Proximal row carpectomy versus four-corner fusion — motion-preserving strategies are an alternative to fusion in SLAC/SNAC osteoarthritis.
Page reviewed and approved by Dr Frédéric Teboul, hand, brachial plexus, and peripheral nerve surgeon, member of the Académie Nationale de Chirurgie.
Last updated: August 23, 2026
Disclaimer. This page is intended to provide information about a specialized surgical technique. It does not replace a consultation. The choice among the options for an osteoarthritic wrist is made case by case, based on the wear, your needs, and your expectations.
Author of this publication
Every piece of content is signed by its author and reviewed before publication.
Author
Dr Frédéric Teboul
Hand and peripheral nerve surgeon