›

What Is All-on-X? A Complete Guide

Dr. Nav Atwal

All-on-X is a full-arch dental implant treatment that replaces all the teeth in a jaw with a fixed, non-removable bridge supported by a small number of implants — usually four (All-on-4) or six (All-on-6). The "X" is the number of implants. Unlike a denture it stays fixed in place, and patients often receive a temporary set of teeth the same day as surgery.

Key Takeaways

- All-on-X replaces a full arch of teeth with a fixed bridge on a few implants — the "X" is the number of implants. - The common versions are All-on-4 (four implants) and All-on-6 (six). - It is fixed in place and does not come out like a denture; only a dentist removes it for maintenance. - Patients often leave with a temporary fixed arch the same day as surgery ("teeth in a day"). - It suits people with a failing dentition, many missing teeth, or loose, uncomfortable dentures.

All-on-X is a way to replace a full arch of missing or failing teeth with a complete set of fixed, non-removable teeth supported by a small number of dental implants — usually four or six. The "X" stands for the variable number of implants used to anchor the arch, which is why you'll see it written as All-on-4, All-on-6, and so on. Unlike a denture, it stays firmly in place; unlike replacing teeth one at a time, it restores an entire jaw efficiently and economically.

What the Name Means

The concept is simple: an entire arch of teeth ("all") is supported on a defined number of implants ("X").

All-on-4 — the full arch is carried by four implants, two placed straight at the front and two angled at the back for stability.
All-on-6 — six implants share the load, often chosen for greater support or where bone allows.

All-on-X is simply the umbrella term for the approach, regardless of the exact number. The differences between the two most common versions are covered in detail in All-on-4 vs All-on-6.

How It's Different from Other Options

Versus dentures

A traditional denture rests on the gums and is removed for cleaning. All-on-X is fixed to implants, so it doesn't slip, doesn't need adhesive, and lets you bite and chew with far more confidence. It also preserves the jawbone, which dentures cannot. For a full side-by-side, see All-on-X vs dentures.

Versus single implants

Replacing every missing tooth with its own implant would require many more implants, more surgery, and more cost. All-on-X uses the engineering insight that a few well-placed implants can support a whole arch.

Teeth in a Day

One of the defining features of All-on-X is that patients often leave the surgery with a fixed temporary arch the same day. The implants then integrate with the bone over the following months, after which a stronger, final prosthesis is fitted. You are rarely without teeth at any stage. The full sequence is walked through in the All-on-X procedure, step by step.

Who It's For

All-on-X is designed for people who:

Have lost, or are about to lose, most or all of the teeth in an arch
Are struggling with loose, painful, or ill-fitting dentures
Have widespread decay, gum disease, or failing older dentistry
Want a fixed, long-term solution rather than something removable

A deeper look at suitability, including bone loss and health factors, is in Am I a Good Candidate for All-on-X?

What the Result Feels Like

Because the teeth are anchored to the bone rather than resting on the gums, All-on-X restores not just appearance but function — the ability to eat a normal range of foods, speak clearly, and smile without thinking about it. Done well, it also rebuilds the facial support that's lost when teeth and bone recede.

A Treatment Planned Around the Face

A full arch is as much a facial reconstruction as a dental one. In my practice, every All-on-X case begins with how the teeth should support the lips and face and how the bite should function — never with the implants viewed in isolation. If you're exploring whether All-on-X is right for you, a consultation is the place to get a clear, personal answer.

— Dr. Nav Atwal

Related Reading

Frequently Asked Questions

What does All-on-X mean? All-on-X means a full arch of fixed teeth supported by a number of dental implants, where the "X" stands for how many implants are used, such as four for All-on-4 or six for All-on-6. What is the difference between All-on-4 and All-on-X? All-on-X is the umbrella term for the approach, while All-on-4 is the specific version that uses four implants per arch. All-on-6 uses six. Is All-on-X removable? No. The teeth are fixed to the implants and stay in place. Only your dentist removes the prosthesis for periodic professional cleaning and maintenance. How is All-on-X different from dentures? Dentures rest on the gums and are taken out, while All-on-X is anchored to implants, so it doesn't slip, needs no adhesive, and preserves the jawbone. Can you get teeth the same day with All-on-X? Often yes. Many patients receive a fixed temporary arch on the day of surgery, with the final prosthesis fitted after the implants integrate with the bone. Does All-on-X replace all your teeth? It replaces all the teeth in one arch. A patient needing both the upper and lower jaw restored would have an All-on-X arch placed in each.

‹ How Long Does All-on-X Last?

The All-on-X Procedure: What to Expect, Step by Step ›