PEEK is my first choice for custom facial implants, and I have read a great deal of nonsense written about why. In Dubai I meet patients who have been told the material behaves like bone, that the body accepts it as its own, that it fuses to the skeleton. None of that is true, and none of it is the reason to use it.
So let me say plainly what I tell every custom-implant patient in Dubai. Polyetheretherketone is a rigid, inert, radiolucent polymer. It is considerably softer than the bone it rests against, and the body neither bonds to it nor attacks it. Those two facts are usually presented as its virtues by people who have inverted them. They are, properly understood, the trade it makes — and understanding the trade is what lets a surgeon choose it for the right reasons.
Key takeaways: the material itself
- PEEK is 3–4 GPa; cortical bone is 7–30. It does not match bone.
- Titanium is 110 GPa. That is the comparison that matters.
- PEEK is bioinert: bone does not grow onto it.
- Coatings that would change this are unreported in facial surgery.
- It is radiolucent, screw-fixable, and adjustable on the table.
- Inertness is why it can be removed again if you change your mind.
A note on scope: this article is about the material. Which implant material suits which patient — silicone, porous polyethylene, PEEK, titanium — is a separate decision I set out in my article on chin implant materials and facial proportions, and how a bespoke implant is designed from a scan in my article on custom chin implants and jawline balance.
The stiffness claim, and the number behind it
You will read that PEEK has an elastic modulus remarkably similar to human cortical bone. Elastic modulus is simply a measure of stiffness: how much a material resists being bent. Unreinforced PEEK measures around three to four gigapascals. Human cortical bone measures between seven and thirty, commonly cited around eighteen.
That is not similarity. PEEK is several times softer than the bone it is screwed to, and the biomaterials literature says so plainly, describing its modulus as considerably lower than that of cortical bone. Only carbon-fiber reinforced PEEK reaches bone stiffness, and that is a different material from the one in a facial implant.
So why does anyone raise the comparison at all? Because of the material it replaces. Titanium measures around one hundred and ten gigapascals — some thirty times stiffer than bone. Screw a very rigid metal onto a softer bone and the metal carries the load the bone should have carried; the bone, unstressed, slowly thins beneath it. This is stress shielding, and PEEK reduces it not by matching bone but by being far closer to bone than metal is. The honest sentence is comparative, not absolute.
How PEEK actually behaves against bone, and why its two most-quoted virtues are misstated, by Dr. Nazmi Baycin, Dubai.
The integration claim, and why the opposite is true
The second thing you will read is that PEEK permits direct bone apposition, that bone grows onto it, that it integrates. It does not. PEEK is bioinert, which means precisely that the body does not react to it: it neither attacks the implant nor bonds to it.
A systematic review of thirty-two studies covering 194 patients with patient-specific PEEK implants states the position without ambiguity: while PEEK offers mechanical resilience, durability, and compatibility with imaging, its biologically inert nature hinders integration with the host tissue. That inertness is the recognized limitation of the material, not a hidden strength.
The same review examines the strategies developed to overcome it — hydroxyapatite coating, titanium coating, engineered porous surfaces — and then reports something a patient deserves to know. The literature contains no reports of coated or modified PEEK being used in facial reconstructive or aesthetic surgery at all. The fix exists in the laboratory. It has not arrived in the operating room.
Why an inert implant is nevertheless the right one
Consider what the alternatives mean. A material that truly integrates with bone cannot later be removed without taking bone away with it. A material that provokes the body is walled off in a capsule of scar, which contracts, and which is why some implants shift or become palpable over years. PEEK does neither.
Rigidly screwed to the skeleton, it does not migrate, because it is fixed rather than because it has fused. It is not encapsulated, because there is nothing to wall off. And if a patient changes her mind in a decade, it can be unscrewed and lifted out, leaving the bone as it was. That reversibility is a direct consequence of the inertness. It is the feature, not the consolation.
| Property | What is claimed | What is true | Why it matters |
|---|---|---|---|
| Stiffness | Similar to bone | 3–4 GPa vs bone 7–30 | Still far closer than metal |
| Integration | Bone grows onto it | Bioinert; no bonding | Makes removal possible |
| Coated PEEK | Improves integration | Unreported in facial use | Laboratory, not clinic |
| Imaging | An added benefit | Radiolucent, no scatter | Genuine, and undersold |
What the material actually gives
Strip away the mythology and a short list of real advantages remains, every one of them a property of the polymer rather than a resemblance to tissue:
- Radiolucency: it is transparent to X-rays, so a future scan of the face is not obscured by a bright scattering artifact, as a metal implant would obscure it.
- Rigid fixation: it is screwed to the bone, which means it cannot rotate, drift, or settle into a pocket over years.
- Intraoperative adjustability: it can be contoured with a high-speed bur on the table if the fit demands it, which titanium tolerates poorly.
- Reduced stress shielding: being far softer than metal, it takes less load away from the bone beneath it.
- Precision: it is milled or printed to one skeleton, from that patient’s own scan.
The clinical record supports the choice. A series of forty-four patient-specific PEEK implants in thirty-seven patients, followed for a mean of seventy-eight months, recorded no implant dislocation, no rupture, and no long-term infection. That is a long time for a foreign body to sit quietly against the facial skeleton.
What remains genuinely uncertain
Two honest caveats. The same authors note that predicting how the soft tissue will drape over a newly augmented skeleton remains difficult — the bone can be planned to a fraction of a millimeter, and the envelope covering it still behaves as it wishes. That problem is not solved by any material, and I discuss it in my article on relapse after chin surgery.
And the long-term behavior of uncoated PEEK in the face is still being studied. The systematic review calls explicitly for prospective long-term work on the stability of uncoated implants. Seventy-eight months is reassuring. It is not a lifetime, and I would not pretend otherwise. My approach to the operation itself is set out on my page about chin surgery in Dubai.
Choosing a material for what it does
I use PEEK in Dubai because it is rigid, inert, radiolucent, screw-fixable, adjustable, and reversible. Not because it mimics bone, which it does not, and not because bone embraces it, which bone declines to do.
A surgeon who tells you a material behaves like your own tissue is telling you something that would be remarkable if it were true. Ask instead what the material does: how stiff, how inert, how visible on a scan, how easily removed. The answers are less romantic and considerably more useful, and giving them is part of what I owe you as a board-certified plastic surgeon in Dubai.
FAQs about PEEK facial implants in Dubai
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Is PEEK as stiff as bone?
No, and you will read that it is. Unreinforced PEEK measures around three to four gigapascals of elastic modulus. Human cortical bone measures between seven and thirty. The biomaterials literature describes PEEK’s modulus as considerably lower than that of cortical bone. Only carbon-fiber reinforced PEEK reaches bone stiffness, and that is a different material from the one used in facial implants. So the comparison is not with bone. It is with titanium, at around one hundred and ten gigapascals, which is where PEEK’s real advantage lies.
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What is stress shielding, and does PEEK prevent it?
Screw a very rigid metal onto a softer bone and the metal carries load the bone would otherwise have carried. Bone that is not loaded slowly thins. That is stress shielding. PEEK reduces it, and does so by being far closer to bone than metal is, rather than by matching bone. So the honest sentence is comparative. PEEK is several times softer than bone, and titanium is some thirty times stiffer than bone. Sitting nearer to bone is the whole of the benefit.
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Does bone grow onto a PEEK implant?
It does not. PEEK is bioinert, which means precisely that the body does not react to it: it neither attacks the implant nor bonds to it. A systematic review of thirty-two studies covering 194 patients states that while PEEK offers mechanical resilience and durability, its biologically inert nature hinders integration with the host tissue. So integration is the recognized limitation of the material, not a hidden strength. Anyone telling you bone fuses to PEEK has it precisely backward.
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Are there coatings that make PEEK integrate?
In the laboratory, yes. Hydroxyapatite coating, titanium coating and engineered porous surfaces have all been studied, and all show promise for improving osseointegration. The same systematic review then reports something I think you should know. The literature contains no reports of coated or modified PEEK being used in facial reconstructive or aesthetic surgery at all. So the fix exists in research and has not arrived in the operating room. What is implanted in a face today is uncoated, inert PEEK.
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If it does not integrate, will it move?
No, because it is screwed rigidly to the skeleton. It does not migrate because it is fixed, not because it has fused. This is the difference between an implant placed in a soft-tissue pocket, which can rotate or settle over years, and one bolted to bone. So stability comes from fixation rather than biology. That is a more predictable foundation than hoping the body will hold something in place for you.
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Why choose an inert material at all?
Consider the alternatives. A material that truly bonds to bone cannot later be removed without taking bone with it. A material that provokes the body is walled off in a capsule of scar, which contracts, and which is why some implants shift or become palpable over the years. PEEK does neither. It sits where it is screwed, indefinitely, without a capsule and without fusion. So if you change your mind in a decade, it can be unscrewed and lifted out, leaving the bone as it was. That reversibility is a feature of the inertness, not a consolation for it.
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Will it show up on future scans?
Pleasingly, no. PEEK is radiolucent, meaning transparent to X-rays, so a future scan of your face is not obscured by the bright scattering artifact that a metal implant produces. For anyone who may one day need imaging of the facial skeleton, sinuses or teeth, this is a genuine and rather undersold advantage. So it is one of the properties I actually choose the material for, alongside its rigidity, its adjustability on the table, and the fact that it can be removed.
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How long do we know PEEK implants last?
The best evidence I can offer is a series of forty-four patient-specific PEEK implants in thirty-seven patients, followed for a mean of seventy-eight months, in which no implant dislocated, ruptured, or became infected in the long term. That is a long time for a foreign body to sit quietly against the facial skeleton, and it is genuinely reassuring. So I would still not call it a lifetime. The systematic review explicitly calls for longer prospective study of uncoated PEEK, and I would rather tell you that than imply a certainty nobody yet has.
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