When a Zygomatic Implant Fails: Signs, Removal and Revision

The pooled figures are reassuring but they are not zero, and the shape of the risk matters as much as its size. A 2023 systematic review and meta-analysis covering 1,349 zygomatic implants in 623 patients reported an annual failure incidence of 0.7%, with about 2% failing during the first year and roughly 0.5% per year afterwards. Prosthesis survival — the bridge on top, as distinct from the implants underneath — was 94%. [1]

That front-loading is worth understanding. The first months carry more risk than the years that follow, because that is when the implant is either integrating with bone or not. It is also why the aftercare arrangements you make before surgery matter more than they might seem to at the time. Our recovery guide sets out what those first months normally involve, and the risks guide covers the complication picture in full.

The picture is not entirely front-loaded, though, and a long-follow-up series complicates it usefully. In 56 patients followed for a mean of 8.8 years and up to 17, mean time to implant failure was 8.6 years, and the most frequent complications appeared late — local orofacial inflammation in 35.7% of patients at a mean onset of 10.0 years, and sinusitis in 12.5% at a mean of 10.3 years. Long-term follow-up is not a formality. [2]

Early failure means the implant never integrated. It usually shows itself within the first weeks to months, and the practical consequence is that the implant is loose. Contributing factors described in the general implant literature include infection, inadequate primary stability, and patient-level risk factors such as smoking, which raises failure odds most in the upper jaw. [3] [4]

Late failure means integration happened and was then lost, or that a biological complication developed around a stable implant. Sinusitis is the most commonly reported complication associated with zygomatic implants specifically, with a pooled prevalence of 14.2%, and it is the complication most likely to lead to implant loss. [5]

One factor sits underneath both categories, and the evidence is unusually consistent about it: complication rates track surgical technique and operator experience. A review of 24 studies covering 2,194 implants found similar survival between the two main approaches but markedly different complication profiles — sinusitis 9.53% versus 4.39%, soft tissue infection 7.50% versus 4.35%, paresthesia 10.78% versus 0.55%, and oroantral fistula 4.58% versus 1.71%. [6]

Usually yes. A failed zygomatic implant is generally removable, and removal is a planned surgical procedure rather than an emergency in most cases. Because these implants anchor in the cheekbone rather than the jaw, removal and any subsequent plan involve the same anatomy — the sinus and the orbital floor — that made the original operation demanding, which is why it is work for someone who does these routinely.

What follows removal is the more open question, and it depends on why the implant failed, how much bone remains in the zygoma afterwards, and whether the other implants supporting the bridge are stable. A replacement zygomatic implant is sometimes possible; sometimes the plan shifts to a different configuration, and sometimes to a removable prosthesis. Nobody can tell you which applies without new imaging.

It is also worth separating two things that get conflated. If the bridge fails — a fracture, a loose screw, wear — that is a prosthetic problem and the implants underneath may be entirely sound. Pooled prosthesis survival of 94% is lower than implant survival, so prosthetic work is the more likely thing to need attention over time. [1]

This is the scenario the aftercare conversation should have covered before you travelled, and often did not. Two things are worth knowing precisely, because the general advice circulating online is vaguer than the actual position.

First, the regulator. The General Dental Council registers the professionals who may practise in the UK, and says plainly that it "can't guarantee another organisation like us exists in other countries, or even that the standards will be the same". Its advice is to speak to your own dentist before travelling, "in case of any later complications" — which is also the fastest route to help afterwards. [8]

Second, the NHS. Its published policy is that patients are entitled to NHS assessment and to stabilisation of an acute problem. But self-funded care that the NHS would not itself have funded "would not usually be offered or replaced once stabilisation has been achieved". In practice that means the NHS will help with an infection or acute pain; it does not mean it will redo the treatment. [9]

Neither of those is a reason not to travel. They are the reason to establish, before you book, who handles a complication, what it costs, and whether you will be flying back for it. Our Turkey guide covers that in the context of the whole decision, and how to check a surgeon has the questions that surface it.