If you are missing most or all of your teeth — or facing full-arch extractions — you have likely come across two names: All-on-4 and All-on-6. Both are full-arch implant solutions that replace an entire row of teeth with a fixed, non-removable prosthesis supported by implants. Neither requires individual implants for every tooth. Both can significantly improve function, comfort, and confidence.

But they are not the same, and choosing between them matters. The right solution depends on your bone density, bite forces, aesthetic goals, and long-term expectations. This guide breaks down exactly how they differ — so you can walk into your consultation at Dentistry at Vitality Health already informed.

What Both Solutions Have in Common

Before getting into the differences, it helps to understand what All-on-4 and All-on-6 share:

• A fixed, non-removable prosthesis. Unlike dentures, neither solution comes out at night. The bridge is screwed into the implants and stays in place permanently.
• Immediate function. In most cases, a temporary prosthesis is placed the same day as surgery, so you leave the clinic with teeth.
• Bone preservation. Both solutions stimulate the jawbone through the implants, preventing the bone loss that accelerates with dentures over time.
• A natural appearance. The final prosthesis is crafted from high-quality ceramic or zirconia and designed to match your facial proportions and desired tooth shade.
• Dramatically improved quality of life. Patients consistently report being able to eat, speak, and smile with a confidence they had lost years earlier.

The difference lies in how many implants anchor that prosthesis — and what that means for stability, bone requirements, and longevity.

All-on-4: Four Implants, Full Arch

The All-on-4 technique was developed to make full-arch restoration accessible to patients who had experienced significant bone loss — a common consequence of long-term tooth loss or extended denture wear.

How it works: Four implants are placed in the jaw. The two at the front are positioned vertically. The two at the back are angled at up to 45 degrees, which allows them to engage more bone and avoid the areas where bone is typically thinnest. This angulation is the key innovation — it maximises contact with available bone without requiring bone grafting in most cases.

Who it suits best:

• Patients with moderate to significant bone loss in the back of the jaw
• Those who want to avoid bone grafting procedures and the extended healing time they require
• Patients seeking a faster path to a fixed solution
• Those with a lighter bite or lower chewing demands

The trade-off: Four implants distribute the load of a full arch across fewer anchor points than six. For most patients this is entirely sufficient. But for those with heavier bite forces, larger jaw structures, or higher demands on the prosthesis, four implants may not provide the same long-term stability as six.

All-on-6: Six Implants, Greater Stability

All-on-6 follows the same principle — a full-arch prosthesis anchored by implants — but adds two additional implants to the equation. Those two extra anchor points make a meaningful difference in certain situations.

How it works: Six implants are distributed across the arch, typically with more even spacing. This broader distribution spreads chewing forces more evenly across the jaw, reduces stress on each individual implant, and provides a more rigid foundation for the prosthesis.

Who it suits best:

• Patients with good to excellent bone volume and density
• Those with stronger bite forces or larger jaw structures
• Patients who want maximum long-term stability and prosthesis longevity
• Those replacing teeth in the upper jaw, where bone is naturally less dense
• Patients who are younger and want a solution built to last decades

The trade-off: All-on-6 requires more available bone. If significant bone loss has already occurred, bone grafting may be needed before implants can be placed — adding time and cost to the treatment. It is also a more involved surgical procedure, though the difference in recovery is typically modest.

Side-by-Side Comparison

	All-on-4	All-on-6
Number of implants	4	6
Bone requirement	Moderate (works with bone loss)	Higher (more bone needed)
Bone grafting	Rarely required	Sometimes required
Load distribution	Good	Excellent
Best for upper jaw	Suitable	Preferred
Ideal bite forces	Light to moderate	Moderate to heavy
Prosthesis longevity	Excellent	Excellent to very good
Treatment timeline	Often faster	May be longer if grafting needed

The Upper Jaw vs the Lower Jaw

One factor that often tips the decision is which arch is being treated. The upper jaw (maxilla) is naturally less dense than the lower jaw (mandible). This means implants in the upper jaw have less bone to integrate with, and the forces of chewing are distributed differently.

For this reason, many clinicians experienced in implant dentistry — including our team at Vitality Health — prefer All-on-6 for upper arch restorations when bone volume allows. The additional two implants provide meaningfully better support in a region where bone density is inherently lower.

For the lower jaw, All-on-4 often performs exceptionally well, particularly when the front of the jaw retains good bone density.

What About Cost?

All-on-6 typically costs more than All-on-4, reflecting the additional implants, materials, and surgical time involved. However, the difference is often smaller than patients expect — because the prosthesis itself (the bridge) represents a significant portion of the total cost regardless of how many implants support it.

It is also worth considering the long-term picture. A solution that provides greater stability and longevity may reduce the likelihood of needing repairs or replacements over a 20-to-30-year horizon. In that context, the additional upfront investment in All-on-6 can represent strong value.

During your consultation, we will provide a detailed treatment plan with transparent pricing for both options where applicable, so you can make a fully informed decision.

How the Decision Is Made

No blog post can tell you which solution is right for you — that requires a proper clinical assessment. At Dentistry at Vitality Health, we use 3D CBCT imaging (cone beam computed tomography) to produce a precise three-dimensional map of your jaw. This allows us to measure bone volume and density at every potential implant site, identify anatomical structures to avoid, and plan implant placement with computer-guided precision before surgery begins.

Based on that imaging, combined with your medical history, bite analysis, and aesthetic goals, we will recommend the solution that gives you the best long-term outcome — not simply the one that is easiest to place.

In some cases the choice is clear-cut. In others, both options are genuinely viable and the decision comes down to your priorities. We will walk you through both scenarios so you understand exactly what you are choosing and why.

Life After Full-Arch Implants

Whichever solution you choose, the experience of living with a full-arch implant restoration is remarkably similar — and remarkably different from dentures.

You will be able to eat foods you may not have enjoyed in years: apples, steak, crusty bread, corn on the cob. You will not worry about your teeth shifting when you speak or laugh. You will not need adhesives. You will not take your teeth out at night.

Maintenance is straightforward: brush twice daily, floss around the implants, and attend regular hygiene appointments. With proper care, a well-placed full-arch restoration can last 20 years or more.

Ready to Find Out Which Option Suits You?

The best next step is a consultation. We will take the imaging needed to assess your bone, discuss your goals, and give you a clear recommendation — along with a treatment plan and timeline that fits your life.

Our team has placed over 20,000 implants and performs full-arch restorations using computer-guided surgery for precision that simply was not possible a decade ago. We would be glad to help you find your way back to a full, confident smile.