All-on-4 vs All-on-6: Which Questions Should You Ask Before Choosing?

All-on-4 vs All-on-6: what the names actually describe

Both terms are used for fixed full-arch restorations supported by dental implants. The number refers to the number of implants used to support the arch in that plan. It does not tell you the implant brand, exact positions, bridge material, whether grafting is needed, whether the provisional is fixed, or whether the treatment is appropriate for you.

What can influence the planned implant count?

Full-arch planning is individualized. Factors a treating team may consider include available bone, bone distribution, anatomical structures, the opposing teeth or prosthesis, restorative space, bite forces, implant positions and the planned prosthetic design. Imaging such as CBCT can be important to surgical planning.

Does six implants automatically mean a stronger or better result?

No universal rule allows a website to make that conclusion for an individual patient. More implants can change load distribution and redundancy in a design, but anatomy, implant position and prosthetic design matter. Conversely, a well-planned four-implant design may be the intended treatment for a particular arch.

Instead of asking a salesperson “Is six better?”, ask the treating clinician: “What changes clinically in my plan if you use four versus six, and what evidence in my imaging supports your recommendation?”

How implant count can change the quote

Some providers price an additional implant as an incremental amount; others use separate package tiers for four, five or six implants. The price difference is only meaningful if the rest of the package is the same.

Price-example note: The figures below are prices published by individual Medellín providers and are included to show how quotes can be structured. They are not a Colombia-wide average, endorsement, guarantee, or quote for your case.

For example, one Medellín provider currently publishes separate per-arch tables for All-on-4, All-on-5 and All-on-6, with the total also changing by bridge material. This demonstrates that implant count and prosthetic material can be independent price variables.

Do not compare implant count and ignore the bridge

The final restoration is what you chew with and maintain. Record the bridge material, framework/design, whether it is screw-retained or otherwise retained, how it is cleaned, how repairs are handled and whether replacement teeth/components can be serviced outside the treating clinic.

If a quote says only “All-on-6 zirconia,” ask whether “zirconia” describes the entire bridge, a portion of it, or another component. Ask for the exact restorative description in writing.

Ask about the plan if one implant has a problem

The FDA notes that implant complications can occur and can sometimes require another procedure. A useful full-arch discussion therefore includes contingency planning: what happens if an implant does not integrate, if a component loosens, or if the provisional fractures during the healing period?

This is not a reason to assume failure. It is simply part of comparing the completeness of two treatment plans.

Questions that make the comparison clinically useful

1. Why are you proposing four, five or six implants in my arch?
2. What in my CBCT or examination drives that decision?
3. Would the implant positions change with a different count?
4. Does the final bridge material/design change?
5. Would grafting requirements change?
6. What is the incremental fee for additional implants?
7. If an implant does not integrate, what is the contingency plan?
8. What implant system will be used?
9. How will I clean under the bridge and what maintenance interval do you recommend?
10. Can the prosthesis and components be serviced by another qualified dentist if I am back home?

A simple decision worksheet

What should not decide the implant count by itself

A package name, a salesperson’s preference, an influencer video, or the idea that “more must be better” should not replace case-specific planning. Likewise, cost alone should not be used to force a four-implant plan if the treating clinician believes another design is appropriate, or to upsell additional implants without explaining what they change.

If two qualified clinicians recommend different implant counts, ask each to explain the rationale using the same imaging and restorative goals. Differences can reflect legitimate planning choices. Your job as a patient is not to referee implant biomechanics from the internet; it is to obtain clear explanations of the tradeoffs, costs and contingency plans.

Maintenance can expose differences that the sales page does not

Ask how the bridge is removed if professional service is required, what components are proprietary, how replacement screws or parts are sourced, and whether the clinic supplies an implant passport or system information. A treatment that is easy to buy but difficult to service from another country creates a long-term logistics problem.

Compare the provisional and final stages separately

Two plans can use the same implant count and still feel very different to the patient because of the provisional phase. Ask whether a fixed provisional is planned, when it is delivered, what material it uses, what diet restrictions apply, and how repairs are handled while you are abroad or back home. Then ask the same questions about the definitive bridge: material, framework, manufacturing workflow, try-in process and adjustment policy.

This separation is especially important if one provider’s package emphasizes “teeth in a day.” A rapid provisional can be valuable, but it does not erase the biological healing period or answer what the final restoration will be. Write down what happens on day one, what you wear during healing, and what you receive at the definitive phase.

When two treatment plans disagree

If one clinician proposes four implants and another proposes six, do not assume one must be wrong. Ask both to explain their implant positions, bone assumptions, prosthetic design and contingency plan. If the difference would materially change cost or require removal of additional teeth or grafting, a separate professional opinion can help you understand the reasoning before irreversible treatment.