What are full-arch implant teeth actually made of, and which material is best?

The one problem behind every failure

Everything below comes back to one problem.

You want the frame joining the implants to be rigid, and the teeth to have a little give. Those pull in opposite directions. For thirty years, the field tried to get both by bonding two materials together, usually a stiff metal frame with something tooth-colored on top.

Two materials that flex differently, bonded together and chewed on thousands of times a day, eventually come apart. Usually somewhere between two and ten years in, long after everyone has called it a success.

The materials kept changing. That failure didn't.

Acrylic teeth on a metal bar

The original approach, and still the best known. Denture teeth are set in pink acrylic over a metal bar.

It worked, and it's why this field exists. We've seen sets from the 1990s still in use after twenty-five or thirty years.

But it failed in a predictable way. The teeth came loose from the acrylic, or the acrylic cracked over the bar. Acrylic was never meant to carry that kind of load against metal.

It was hard on patients, too. Four or five appointments before anything went in, design choices made by the lab from wax try-ins instead of by the patient, and final teeth bulkier than the temporaries because the bar took up room the teeth needed.

PMMA, a good temporary sometimes sold as a final

PMMA is milled from one solid block, so it was the first set made in one piece instead of assembled. That was a real step forward.

It's approved as a temporary, and that matters. It's porous, so it stains, collects plaque and can start to smell, and it comes loose from a bar over time.

We use it rarely, and only as what it is, a three-month temporary when there's a reason to wait. Usually that's a question about how stable an implant is, or a patient who needs more time than we can safely allow for taking the teeth on and off.

Some practices offer PMMA as final teeth and describe it without using the word temporary. If you're quoted a lower price for a "permanent" set, ask what it's made of and how long it's designed to last.

Nanoceramic - the one that cost us

Plastic with ceramic particles dispersed through it. The pitch was that it had the polish and strength of ceramic with the flexibility of plastic. It needed a titanium bar underneath.

Everyone said it was the future. The manufacturer, the implant companies, the sales representatives, the lab, the designers. We believed it and we used it.

It failed at two to five years. Consistently.

We replaced every one of them at our own cost, because that is what a warranty means. It was the most expensive mistake this practice has made, by a distance, and it was paid personally rather than passed on to anyone.

The material company's response was to offer a small discount on future material.

Our own co-host was one of those patients - he had nanoceramic for three years across two sets, watched both stain and fracture, and spent that time assuming he was doing something wrong. He had cut hard food out of his diet entirely and it still failed. That is the part worth sitting with: a material that fails slowly makes patients blame themselves.

We then did what the industry did, and tried to fix it by changing the bar - fiber-reinforced plastic frames intended to flex more sympathetically. That made it worse. The bar took up so much room that the nanoceramic became a thin shell, and when those failed they failed catastrophically.

We also tried individual crowns cemented onto a bar. Around twenty separate parts, food trapped between them, movement between the crowns, and a bar that was very difficult to hide. Twice, and never again.

Monolithic zirconia

One solid piece. No bar, no bonding, nothing layered on top.

We switched to it fully around 2019. We waited on purpose, because early zirconia looked like chalk. Manufacturers couldn't make a block thick enough for a full arch that was also translucent, so the teeth looked flat and lifeless. That's been solved, and today's zirconia has the depth of real teeth.

It isn't porous, so it doesn't stain or hold odors the way older materials did, and it's easy to clean.

For strength, a single solid piece of zirconia is the strongest. A titanium bar holding separate zirconia crowns comes next. Layered nanoceramic on a frame is the weakest. And the solid piece has far fewer parts, with no bonded joints to come loose.

Why we don't put zirconia on a titanium bar

It's in fashion right now, and we don't do it.

It's the same setup that failed for us before, a hard, brittle material bonded to a metal frame that flexes differently, with cement holding the two together.

The industry likes it for a real reason. A bar is forgiving. If the implant positions are recorded slightly off, the bar takes up the difference instead of passing it into the zirconia.

A solid zirconia arch isn't forgiving. If the implant positions are slightly wrong, it can crack as it's tightened. That happened to us once, years ago.

So we focused on getting the positions exactly right. That's what our photogrammetry and verification steps are for. A precise fit helps the implants heal, and it keeps the teeth from breaking themselves.

What to ask about your own teeth

What exactly is it made of, and is it the final set? Ask for the name of the material, not "porcelain," "ceramic" or "high-strength."

Is anything bonded or cemented to anything else? Every long-term failure on this page happened at a joint.

Is it porous? Porous materials stain and hold bacteria. That's the difference between teeth that look the same in ten years and teeth that don't.

How long has the practice used this material, and how are the sets from five years ago doing? We can answer that for every material on this page, including the ones we got wrong.

Why we're telling you this

It would be easier to say we use the best material and leave it there.

But every material here was called the best at the time, by people who believed it, including us. We didn't cut corners with nanoceramic. We were sold on it, checked it as well as we knew how, and were wrong.

The lesson we took is to choose one solid piece over two joined together, and to be wary of any material whose main selling point is that it's new.