Medically reviewed by Dr. Sam Wood
All-on-4 is a technique for replacing a full arch of missing or failing teeth with a fixed bridge supported by four dental implants: two placed vertically at the front of the jaw and two angled at the back to make use of available bone and avoid the sinus and nerve. Because the implants are angled and positioned strategically, most patients avoid bone grafting, and a temporary fixed set of teeth is usually attached the same day as surgery. In the US, All-on-4 costs $15,000 to $35,000 per arch, and the final prosthesis is fitted after three to six months of healing.
How All-on-4 works
A conventional approach to a full arch of implants might use eight or more implants, often after bone grafting, and take a year or more. All-on-4, developed in the late 1990s, reduces that to four implants placed in the front part of the jaw, where bone is usually densest and lasts longest after tooth loss.
The two front implants go in straight. The two back implants are tilted up to 45 degrees, which lets them be longer and anchor in good bone while their tops emerge further back, giving the bridge a wider base. Twelve to fourteen teeth on an acrylic-titanium or zirconia framework are then screwed onto the four implants. The bridge sits just above the gum, with no palate coverage.
Variations exist: All-on-5 and All-on-6 add implants for extra support, particularly in the softer bone of the upper jaw. The principle is the same.
Who is a candidate
- People missing all teeth in an arch, or whose remaining teeth are failing from decay, gum disease, or fracture
- Long-term denture wearers who have lost bone and want a fixed solution without extensive grafting
- Patients healthy enough for oral surgery with sedation
- Non-smokers, or smokers willing to stop; smoking substantially raises the risk of implant failure
- People with controlled diabetes and no uncontrolled medical conditions affecting healing
Severe bone loss can still rule it out or require grafting first; a CT scan decides. Bruxism (grinding) is not a barrier but requires a night guard and often a zirconia prosthesis.
What All-on-4 costs
| Item | Typical US cost per arch |
|---|---|
| All-on-4 with acrylic/titanium final prosthesis | $15,000 – $28,000 |
| All-on-4 with zirconia final prosthesis | $22,000 – $35,000+ |
| Extractions | $1,000 – $4,000 |
| Sedation / anesthesia | $500 – $2,500 |
| CT scan and planning | Often included |
| Temporary (same-day) prosthesis | Usually included |
| Both arches | $30,000 – $70,000 |
Get an itemized quote from more than one provider and confirm whether the final prosthesis, extractions, and sedation are included. Insurance rarely covers the implants; see our full mouth dental implants cost guide for financing options.
The process
Consultation and planning. Exam, CT scan, impressions or scans, and photographs. The prosthesis is designed digitally and a surgical guide may be printed so the implants go exactly where planned.
Surgery day (2 to 4 hours per arch). Under IV sedation or general anesthesia, any remaining teeth are extracted, the bone is smoothed, and the four implants are placed. Abutments are attached, and an impression is taken. Within hours, or occasionally the next day, a temporary acrylic bridge is screwed on. You leave with fixed teeth.
Healing (3 to 6 months). The implants integrate with the bone. The temporary bridge is functional but you stay on a soft diet for the first weeks and avoid hard or chewy food throughout healing, because too much force can disturb the implants before they bond.
Final prosthesis. New impressions are taken, and the final, stronger bridge is made and fitted. The temporary is kept as a spare.
Recovery
Expect swelling, bruising, and soreness for one to two weeks, controlled with prescribed medication. Most people are back to light work within a few days to a week. The soft-diet phase is the hardest part for many patients: smoothies, soup, eggs, fish, pasta, well-cooked vegetables, no crusty bread, steak, nuts, or raw carrots until cleared. Speech adapts over a couple of weeks.
Advantages
- Fixed teeth that do not come out
- Teeth the same day as surgery in most cases
- Usually avoids bone grafting and sinus lifts
- Fewer implants than conventional full-arch treatment, so lower cost and shorter surgery
- No palate, so normal taste and speech
- Preserves jawbone around the implants
- Well-documented technique with long-term survival rates above 90 percent at ten years in published studies
Disadvantages and risks
- Cost. Among the most expensive dental treatments.
- All eggs in four baskets. If one implant fails during healing, the whole bridge may need to be modified or the case converted to a removable denture until a replacement implant integrates.
- Hygiene. Cleaning under a fixed bridge takes daily effort with a water flosser or floss threaders. Neglect leads to peri-implantitis, the main long-term cause of failure.
- Prosthesis wear. Acrylic teeth wear and chip and typically need replacement after 10 to 15 years; zirconia lasts longer but costs more and can fracture under heavy grinding.
- Extraction of salvageable teeth. Some providers recommend All-on-4 when several teeth could still be saved. Get a second opinion before removing teeth that are not clearly hopeless.
- Speech and bulk. A small number of patients find the bridge bulky at the gum or have persistent lisping.
- Standard surgical risks: infection, bleeding, nerve injury in the lower jaw, sinus complications in the upper.
All-on-4 vs. alternatives
| All-on-4 fixed bridge | Snap-in denture (2 – 4 implants) | Individual implants | Conventional denture | |
|---|---|---|---|---|
| Cost per arch | $15,000 – $35,000 | $6,000 – $20,000 | $30,000 – $50,000+ | $1,000 – $3,000 |
| Removable | No | Yes | No | Yes |
| Grafting usually needed | No | Sometimes | Often | No |
| Same-day teeth | Usually | Sometimes | Rarely | Immediate denture possible |
| Chewing | Near natural | Good | Natural | Limited |
| Cleaning | Under the bridge | Easy (removable) | Like teeth | Easy |
When to see a dentist
See a dentist or prosthodontist if you have multiple failing teeth, a denture you cannot tolerate, or are considering full-arch implants; ask whether any of your teeth can be saved, what the alternatives are at different price points, and to see the provider’s own cases. After All-on-4 surgery, contact your surgeon promptly if you have bleeding that does not stop, swelling that worsens after day three, fever, a loose or moving bridge, a screw that feels loose, or numbness that persists. Long term, see your dentist every six months and sooner for bleeding, odor, or pain under the bridge; peri-implantitis caught early is treatable.
Frequently asked questions
How much does All-on-4 cost?
$15,000 to $35,000 per arch in the US, or $30,000 to $70,000 for both. Zirconia prostheses, extractions, and sedation account for most of the variation.
How long does All-on-4 last?
The implants have survival rates above 90 percent at ten years in published studies and can last decades. The bridge typically needs replacement after 10 to 15 years for acrylic, longer for zirconia.
Is All-on-4 painful?
Surgery is done under sedation or general anesthesia. Afterward, soreness and swelling last one to two weeks and are managed with medication. Most patients describe it as easier than expected given the scale of the procedure.
Can you eat normally with All-on-4?
After healing and the final prosthesis, yes, nearly anything. During the three to six months with the temporary bridge, a soft diet is required to protect the integrating implants.
What is the difference between All-on-4 and All-on-6?
All-on-6 uses six implants per arch for added support and redundancy, often recommended in the upper jaw or for patients with heavier bites. It costs more and requires more bone. Many providers choose between them case by case.
What happens if an All-on-4 implant fails?
During healing, a failed implant is removed, the site heals, and a replacement is placed; the bridge may be supported temporarily on three implants or converted to a removable denture. After integration, failure is uncommon and is usually related to peri-implantitis, which is treatable if caught early.
Sources
- American Association of Oral and Maxillofacial Surgeons – Full-mouth dental implants
- American College of Prosthodontists – Dental implants
- Cleveland Clinic – Dental implants
- Mayo Clinic – Dental implant surgery
This article is for general information only and is not a substitute for professional dental advice, diagnosis, or treatment. Always consult a licensed dentist about your specific situation.