All-on-4® Dental Implants: How They Work, What They Cost, And Who They Suit

All-on-4® dental implants replace a full upper or lower arch of teeth with a fixed, natural-looking bridge held by four implants. As a tooth replacement, it sits between a denture and a mouth full of individual implants. The bridge does not come out at night, it does not need adhesive, and in most cases you leave on the day of surgery with a set of teeth already in place. For people living with failing teeth or a denture that never stays put, it is often the most practical way to get back to eating, speaking and smiling without thinking about it.

It is also a major treatment, and it is not the right answer for everyone. This page covers how All-on-4 works, who is a good candidate, what surgery day and recovery involve, what the teeth are made of, how long it lasts, the real downsides, how it compares with All-on-6 and dentures, and what drives the cost. Our board-certified periodontists have placed over 10,000 dental implants and completed over 1,000 full-arch cases across our offices in Manhattan, Long Island, Westchester and Nutley, NJ.

What Are All-on-4 Dental Implants?

The All-on-4® treatment concept was developed by Dr. Paulo Maló with Nobel Biocare as a way to support a complete set of teeth on the smallest practical number of implants. Instead of replacing each tooth individually, four titanium implants are strategically placed in the jawbone to support a full-arch prosthesis. A traditional implant plan might use two implants to support each short bridge, eight or more for a full set of teeth; All-on-4 uses four dental implants to replace a full arch:

• Two implants vertically in the front, where the jaw usually still has good bone even after years of tooth loss.
• Two posterior implants angled toward the back, which lets longer implants engage denser bone and avoid the sinus in the upper jaw and the nerve in the lower jaw.

That angled placement is what makes the technique work for so many people. The implants are placed where the bone is strongest, using the available bone rather than building new bone first, so many patients who were told they would need bone grafting can be treated without it. The four implants support a fixed full-arch bridge, which is technically a cantilever bridge: the back teeth extend beyond the last implant on each side. Because the teeth are supported by dental implants rather than resting on the gums, dental implants offer something dentures cannot: dental implants stimulate the jawbone as you chew, which helps protect your dental health and facial shape over time.

People call the result many things: implant-supported dentures, fixed dentures, full mouth dental implants, teeth in a day. We use “non-removable” rather than “permanent.” The bridge is screwed to the implants and only your periodontist can take it off, but like any dental work it needs maintenance over the years.

All-on-4 Vs. Dentures Vs. Individual Implants

	Traditional Dentures	All-on-4 Fixed Bridge	Individual Implants
Removable?	Yes, daily	No, fixed to the implants	No
Implants per arch	None	Four, sometimes more	Often eight or more
Covers the palate	Upper denture, yes	No	No
Chewing	Limited; many foods avoided	Close to natural teeth	Closest to natural teeth
Bone	Continues to shrink under the denture	Implants load the bone where they sit	Implants load the bone where they sit
Bone grafting	Not needed	Often avoided	Often needed after long-term tooth loss
Teeth on surgery day	Immediate denture	Usually, yes	Depends on the case
Cost	Lowest	Middle	Highest for a full arch

Traditional dentures still have a place when budget rules out implants. But because they rest on the gums, the bone underneath keeps shrinking, which is why dentures loosen over time. We explain that process in more detail on the effects of full dentures. Implant-retained overdentures sit between the two: they snap onto implants but still come out daily.

Who Is A Good Candidate For All-on-4?

All-on-4 suits adults who are missing most or all of their teeth in one or both jaws, or whose remaining teeth are failing and not worth saving. Typical situations we see:

• You wear a full denture and are tired of it slipping, rubbing or limiting what you eat.
• Advanced gum disease has loosened several teeth, and saving them would mean years of treatment with an uncertain result.
• You have a mouth full of old crowns, bridges and root canals that keep breaking down.
• You have been told you do not have enough bone for implants.

That last group is where a periodontist’s experience matters most. Because the back implants are angled, All-on-4 often works in a jaw that looks too thin for conventional implants. When bone loss is more severe, pterygoid implants anchored behind the sinus, zygomatic implants anchored in the cheekbone, or transnasal implants can support a fixed bridge without major grafting. We place zygomatic implants, but patients who arrive having been told elsewhere that they need them often turn out to have an alternative. If you have been told you need zygomas, a second opinion is worth having.

Gum disease does not rule you out. For many people with advanced periodontitis, removing the failing teeth and placing a full-arch bridge is the better answer rather than a compromise, because it removes the teeth harbouring the infection. The disease still has to be controlled first. We cover this in can you get dental implants with gum disease.

Things that need planning, not necessarily a no: uncontrolled diabetes, smoking (which raises the risk of implant failure, see smoking and dental implants), heavy teeth grinding, some osteoporosis and cancer medications, and GLP-1 injections such as semaglutide if you are planning IV sedation. Tell us about every medication at your consultation.

When All-on-4 is probably not the right choice: if you still have healthy teeth worth keeping, a smaller implant-supported bridge or individual implants may serve you better. Removing healthy teeth to fit a technique is never the goal.

The All-on-4 Procedure, Step By Step

1. Consultation and 3D scan. You meet the periodontist who will do your surgery, not a treatment coordinator first. We take a CBCT scan to see bone height, width and density, and the position of the sinuses and nerves, and we talk through whether All-on-4 is right for you or whether another option fits better.
2. Digital planning. Implant positions are planned in 3D software before surgery. During the procedure we use Navident dynamic navigation to follow that plan in real time.
3. Your new smile is designed. Tooth shape, length and shade are designed around your face and lips, and our in-house lab prepares the teeth you will wear on surgery day.
4. Day of surgery. Any remaining teeth are removed and infection is cleaned out. The jaw is usually smoothed and levelled so the bridge has room and the join between bridge and gum sits out of sight when you smile. The four implants are placed through a minimally invasive osteotomy.
5. Temporary teeth the same day. When the implants are stable enough, which in our experience is the large majority of cases, a fixed set of temporary teeth is attached before you leave. This is called immediate loading. These teeth are a long-term provisional: they look like teeth and let you eat soft foods while the implants heal.
6. Healing period. Over the following months the implants fuse with the bone, a process called osseointegration. The gums also settle and change shape. We check the implants and the fit of your teeth along the way.
7. Final bridge. Once the implants fully integrate with the bone, we take new scans and attach your final fixed implant bridge in the material you choose.

Our same-day protocols go by the names Teeth in an Hour™ and Smile in a Day™. The principle is the same: implants and a fixed set of teeth on the same day.

Is All-on-4 Surgery Painful?

Not during the procedure. Everyone is fully numbed with local anesthetic. Depending on how you feel about treatment and your health, we can add nitrous oxide, oral sedation, or IV sedation administered by a board-certified physician anesthesiologist, so many patients remember very little of the day. Read more about sedation for dental implants.

Afterward, expect swelling, some bruising and soreness for several days, usually managed with over-the-counter pain relief and a prescription where needed. Most people are back at work within a few days. A common surprise is that your tongue and cheeks need time to adjust to the new teeth; some people describe this as a sore throat or a lisp, and it settles as you get used to them.

Recovery And Aftercare

• Soft diet while you heal. The implants are fusing with the bone, so for the healing period you eat soft foods and avoid biting hard or chewy things with your front teeth. We give you a written plan.
• Cleaning. A fixed bridge is cleaned in place, much like natural teeth: brush twice a day and use a water flosser such as a Waterpik, or special floss, under the bridge where it meets the gum. Good oral hygiene and regular dental care are what protect the implants long term.
• Maintenance visits. Regular professional cleanings and checks, with X-rays once a year, let us spot early inflammation around the implants before it becomes peri-implantitis.
• Night guard. If you grind or clench, a night guard protects the bridge.

Temporary Teeth And Your Final Bridge: What They Are Made Of

The implants themselves are almost always titanium implants, the standard in implant dentistry for decades. Zirconia implants exist, but they make up a small share of cases; we explain both on our metal-free zirconia implants page and help you choose rather than steering you to one.

The bigger decision is the bridge, the set of replacement teeth:

• PMMA/acrylic. Used for temporary teeth and as a lower-cost final option. It is light and has a little flex, but it wears faster and is more likely to chip or crack over the years.
• Acrylic teeth on a titanium frame. Stronger than acrylic alone. The individual teeth can wear or come loose and need occasional repair.
• Nanoceramic. Looks natural and is lighter than zirconia, but it is more brittle than PMMA and can crack under heavy bite forces.
• Zirconia. The strongest and most stain-resistant option, and the usual recommendation for people who grind their teeth. It costs more and is heavier to repair if it ever does break.

Most All-on-4 bridges include some tooth-colored gum material at the top. That is because the jaw has lost bone and gum height along with the teeth, and the bridge replaces both. It also hides the joint between bridge and natural gum, which is one reason the bone is levelled on surgery day.

How Long Do All-on-4 Dental Implants Last?

Looked after well, All-on-4 is a long-lasting solution: the implants are designed to last decades. Long-term studies published by the team that developed the technique, with follow-up of ten years and more, report implant survival in the mid-90s percent, and in our own practice patients always leave with fixed teeth: if an implant does not integrate, another is placed while you keep your bridge.

The bridge is the part that wears. Acrylic and PMMA teeth may need repair or replacement after some years, while zirconia lasts considerably longer. How long everything lasts depends heavily on your home care, whether you smoke, whether you grind your teeth, and whether you keep your maintenance visits.

Downsides And Risks Of All-on-4

Every treatment has trade-offs, and you should hear them before you commit:

• It is surgery. Swelling, discomfort and a healing period on soft foods come with it.
• Remaining teeth are removed. That is the right call when they are failing. It is not the right call when they are healthy.
• Bone is reshaped. Levelling the jaw is part of the technique, which is why the bridge usually includes artificial gum.
• Four implants carry a whole arch. If one fails, it has to be replaced, and the load on the others matters. That is why we sometimes recommend more than four.
• Cleaning takes effort. Food can collect under the bridge, and poor hygiene can lead to inflammation around the implants.
• Speech and feel take adjusting. Most people adapt within weeks.
• Heavy grinders can break bridges, especially acrylic ones.
• Cost. It is a significant investment, though usually less than replacing each tooth individually.

Most of these risks come down to planning and experience: how the implants are positioned, how the bite is designed, and how the bridge is made. That is where the choice of surgeon matters more than the name of the technique.

All-on-4 Vs. All-on-6 And Other Options

“All-on-6” uses six implants per arch instead of four. More implants spread the chewing forces, shorten the cantilever at the back, and give a backup if one implant has problems. The trade-off is more surgery and higher cost, and six implants need more bone. Four is the minimum number of implants to support a full arch reliably, not a target. We decide the number from your bone, your bite and your jaw, and some patients get five or six implants, sometimes including pterygoid implants at the back of the upper jaw.

Other full mouth options include snap-in overdentures on two to four implants, conventional complete dentures, and individual implants with separate bridges. We compare them side by side on treatment options for replacing all missing teeth.

How Much Do All-on-4 Dental Implants Cost?

All-on-4 is priced per arch, and the total depends on:

• One arch or both.
• The final bridge material: PMMA/acrylic, titanium-reinforced acrylic, nanoceramic or zirconia.
• How many implants you need, including any pterygoid or zygomatic implants.
• Extractions and infection control on surgery day.
• Bone grafting, if any is needed.
• Sedation, particularly IV sedation.

Dental insurance usually covers part of the extractions and sometimes part of the implants or bridge, but most plans have annual maximums well below the cost of full-arch treatment. We check your benefits before you commit; see our accepted insurance plans. Monthly financing is available through CareCredit and Cherry.

When comparing quotes, check what is included: the temporary teeth, the final bridge and its material, extractions, sedation, and follow-up visits. A low headline price sometimes covers only the temporary teeth. We give you an exact, itemized cost as part of your treatment plan at your consultation, with no sales pitch.

Why Choose A Periodontist For All-on-4?

Implants are placed by periodontists, by specialists in oral and maxillofacial surgery, and by some general dentists. Periodontists specialize in the bone and gums that hold implants in place, and many complicated full-arch cases are referred to us by other dentists. With us:

• You meet your surgeon first. You talk to the doctor who will treat you before you talk about payment.
• Experience with difficult cases. Over 1,000 full-arch cases, including patients told elsewhere that they did not have enough bone.
• Planning technology. CBCT scanning, digital planning and dynamic navigation for implant placement.
• An in-house lab that makes your same-day teeth.
• Second opinions are welcome. We encourage every patient to get one, and we give them regularly.

All-on-4 Dental Implants FAQ

Are All-on-4 Dental Implants Removable?

No. The bridge is screwed onto the implants and only your periodontist removes it, for professional cleaning or repair. That is the main difference from snap-in overdentures, which you take out daily.

Do I Need A Bone Graft For All-on-4?

Often not. Angling the back implants lets us use the bone you have. Some patients need a small graft at the time of surgery, and patients with severe bone loss may need pterygoid or zygomatic implants instead.

Can I Get All-on-4 On Just The Upper Or Lower Jaw?

Yes. Each arch is treated independently, so you can do one arch now and the other later, or keep your natural teeth in the other jaw if they are healthy.

Do You Really Get Teeth In A Day?

In most cases, yes: fixed temporary teeth are attached on the day of surgery. If an implant is not stable enough to load right away, we protect it and attach the teeth once it has healed rather than risk it.

What Can I Eat After All-on-4?

Soft foods during the healing period, such as eggs, fish, pasta, soups and well-cooked vegetables. Once your final bridge is fitted, most people eat nearly everything, though we still advise against chewing ice or cracking nuts with your teeth.

Does Insurance Cover All-on-4?

Partly, in many cases. Extractions and some implant or prosthetic costs may be covered, but annual maximums are usually low compared with full-arch treatment. We will review your plan with you.

What Happens If An All-on-4 Implant Fails?

It is uncommon, and most failures happen early, before the implant has integrated. The implant is removed, the site heals or is treated, and a new implant is placed, while you keep wearing your teeth.

Book An All-on-4 Consultation

If you are considering All-on-4 dental implants, or have been told you need full-arch treatment and want a second opinion, we can help. At your consultation you will meet one of our board-certified periodontists, have a 3D scan, and leave with a clear plan and an exact cost. Call (347) 493-2439 or schedule a consultation at our offices in Manhattan, Long Island, Westchester or Nutley, NJ.