All-on-4 dental implants: how full-arch replacement works

What All-on-4 actually is

"All-on-4" describes both a technique and, loosely, the result: a full arch (upper, lower, or both) of fixed replacement teeth that doesn't come out, supported by four implants rather than one implant per tooth. The two back implants are angled to make the most of the bone that's typically still present toward the rear of the jaw, which is part of why many patients don't need a separate bone-grafting procedure first — something that's often required with traditional single-tooth implants in areas where bone has thinned.

The result is a fixed arch, not a removable denture. It's screwed or cemented onto the implants and functions much like natural teeth for biting and chewing, unlike a traditional denture that rests on the gums and can shift.

Who's typically a candidate

All-on-4 is generally suited to people who are missing most or all of the teeth in an arch, or who have failing teeth that will need to come out — from advanced gum disease, extensive decay, or old dental work that's breaking down. It's also an option for long-time denture wearers who are tired of a removable appliance and want something fixed.

Candidacy depends on your overall dental and general health, including how your jawbone and gums are doing and any medical conditions that affect healing. The only way to know if you're a candidate is an exam with imaging — a 3D scan lets the dentist actually see the bone structure and plan implant placement precisely, rather than guessing.

The day-of process

On the day of surgery, the remaining unhealthy teeth in the arch (if any) are removed, the four implants are placed, and a temporary fixed arch is attached the same day — so you don't leave without teeth. That temporary arch lets you eat, speak, and go about most normal activities while the implants fuse with the jawbone underneath, a process called osseointegration that generally takes a few months.

Once the implants have fully integrated, the temporary arch is replaced with the final, custom-fitted permanent arch. The exact timeline for that second visit varies by patient and how healing is progressing — your dentist will tell you what to expect at each stage.

Recovery

Most patients experience some swelling, soreness, and limited chewing ability in the days immediately after surgery, similar to what you'd expect after any oral surgery — your dentist will give you specific aftercare instructions and guidance on managing discomfort. A soft-food diet is typical for the initial healing period before gradually returning to a normal diet as directed.

Results and healing time vary by patient, and your dentist will monitor your progress at follow-up visits to confirm the implants are integrating as expected before moving to the final arch.

How long All-on-4 tends to last

The implants themselves — the titanium posts anchored in the bone — can last many years, often decades, with regular checkups and good oral hygiene, similar to single-tooth implants. The fixed arch attached to them (the visible replacement teeth) is a separate component and, like any dental prosthetic, may eventually need adjustment, relining, or replacement over the years depending on wear and how well it's cared for. Regular checkups let your dentist catch and address wear before it becomes a bigger problem.

What it typically costs

All-on-4 for one full arch typically runs about $18,000–$28,000, and treating both arches typically starts around $35,000, varying with the materials used and whether any additional grafting is needed. That's a meaningfully larger investment than a single implant (typically $3,000–$5,000), but it replaces an entire arch in one coordinated treatment rather than tooth by tooth. See our full dental implant cost guide for how the numbers break down, including insurance and financing options like CareCredit and our membership plan.