All-on-6 or individual implants for each tooth: which is the right solution when many teeth are missing?

What is the difference between All-on-6 and individual implants?

When many teeth or the entire arch are missing, there are two main directions: All-on-6, meaning a complete fixed dentition supported on 6 implants per arch, and individual implants, i.e. one implant for each missing tooth or fixed bridges on multiple implants. All-on-6 is the right solution when all or most of the teeth are missing and the bone no longer allows implants in every position, while individual implants remain the reference choice when fewer teeth are missing and the bone and remaining teeth are healthy. The right decision is made after a computed tomography (CT) evaluation, because the available bone, the number of missing teeth, the budget and the duration of the treatment weigh differently for each patient.

In our clinic in Cluj-Napoca, we frequently see patients who come to the consultation convinced that they need one solution and leave with a recommendation for the other. That is why in this article we do not tell you which option is better overall, but we show you exactly the criteria we use when building the treatment plan.

Briefly about each solution:

• All-on-6: 6 implants per arch support a complete fixed prosthetic work, usually with the possibility of fixed provisional teeth shortly after the intervention. There is no need for an implant for each tooth.
• Individual implants: Each missing tooth is replaced with its own implant and crown, or groups of missing teeth are replaced with bridges on implants. The result is the closest to natural teeth, but requires sufficient bone in each treated area.

How many implants are needed for a full set of teeth?

A question we hear at almost every total rehabilitation consultation: do I really need an implant for each tooth? The answer is no. A full arch has, excluding wisdom teeth, 14 teeth, but it is neither necessary nor recommended to insert 14 implants.

For a total rehabilitation on implants, the usual variants are:

• All-on-4 or All-on-6: 4 or 6 implants per arch support the entire fixed work. The implants are strategically positioned, often at an angle, to utilize areas of quality bone.
• Fixed bridges on 6-8 implants: multiple segmented bridges on implants distributed across the arch, an intermediate solution for patients with good bone.
• Individual implants for each missing tooth: usually reserved for situations where only a few teeth are missing, not the entire arch.

The more teeth are missing, the more the balance tilts towards All-on solutions, because they offer stability, predictability and a better ratio between result and number of interventions. Details about how these works can be found on our dedicated page fixed dentures on implants.

Decision criteria: how to choose between All-on-6 and individual implants

There is no one-size-fits-all answer, but there are clear criteria that we systematically evaluate in each patient. We present them in the order in which they matter most in practice.

Available bone, the criterion that often decides alone

Individual implants require sufficient bone in each position where we want to insert an implant. After years of edentulism (lack of teeth), bone resorbs, especially in the lateral areas of the jaw, close to the sinuses. If bone is missing in several areas, individual implants would require bone additions or sinus lifts (lifting the sinus membrane with bone addition), which means additional interventions and months of additional healing.

All-on-6 elegantly circumvents this problem: the 6 implants are positioned where the bone exists, often at an angle, avoiding deficient areas. Therefore, for many patients with advanced bone resorption, All-on-6 is the only feasible fixed solution without extensive grafts. The evaluation is always done on CT, not on plain X-ray.

Number of missing teeth and condition of remaining teeth

If 2-4 teeth are missing and the rest of the dentition is healthy, individual implants are usually the natural choice: we keep everything natural and replace only what is missing. If most of the teeth are missing, and the remaining teeth have mobility, advanced periodontitis or extensive destruction, maintaining them just to avoid a total rehabilitation may compromise the long-term result.

In our multidisciplinary clinic, the decision to keep or not the remaining teeth is not made by a single doctor: the implantologist, prosthodontist and, where applicable, the periodontist together evaluate whether the remaining teeth are worth the investment or whether an All-on-6 solution offers a more predictable result.

Treatment duration and comfort along the way

All-on-6 has an important advantage in terms of time: in many cases, the patient can receive a fixed provisional restoration shortly after the implants are placed, so they are not left without teeth during the healing process. The final restoration is performed after the implants have integrated into the bone.

Multiple individual implants, especially if they require bone grafting, can extend the treatment over several surgical stages, with healing periods in between. For patients who want to have as few procedures as possible, this criterion carries a lot of weight.

Budget and long-term maintenance

Perhaps surprisingly, for a large number of missing teeth, All-on-6 is usually more cost-effective than replacing each tooth with its own implant, simply because it uses fewer implants and only one prosthetic work per arch. The final cost, however, depends on the clinical situation: the need for extractions, any bone additions, the material of the final work. We have also detailed these factors on the page about financing dental treatments, because many total rehabilitations are carried out in installments.

For maintenance, both solutions require rigorous hygiene and periodic check-ups. Individual implants are cleaned almost like natural teeth. With All-on-6, cleaning under the fixed work requires specific techniques (oral irrigator, interdental brushes) that we explain and check at each check-up.

All-on-6 or individual implants: direct comparison

The table below summarizes the differences we discuss with our patients during the treatment plan consultation. Keep in mind that it guides, not decides: your clinical situation may tip the balance in one direction or another.

• Choose All-on-6 instead if all or most of your teeth are missing, if the bone is reduced in the lateral areas, if you want fast fixed teeth and a concentrated treatment in a few stages.
• Choose individual implants instead if relatively few teeth are missing, the remaining teeth are healthy, the bone allows for the insertion of implants without major grafts, and you want the solution closest to natural teeth.

In both scenarios, the quality of the implant matters for long-term stability. In our clinic we work with Megagen implant system, used in both total rehabilitations and unitary implants.

What does the path to decision-making look like in our clinic?

Regardless of the solution you lean towards, the evaluation steps are the same, and the final decision is made together with the patient, based on concrete data, not impressions.

1. Dental consultation and CT scan: we evaluate the remaining teeth, gums and bone volume in three dimensions.
2. Multidisciplinary analysis: the implantologist and the prosthodontist together establish the feasible options, from individual dental implants up to All-on-4 or All-on-6.
3. Treatment plan with alternatives: You receive the possible options, with stages, duration and costs for each, so you can make an informed comparison.
4. The actual treatment: extractions where necessary, implant insertion, provisional work, then the final work after bone integration.
5. Maintenance: periodic checks and professional cleanings, which also condition treatment guarantee.

If missing several teeth is already affecting your chewing or your confidence in your smile, don't delay the evaluation: the more the bone resorbs, the more your options become. A CT consultation objectively clarifies which solutions are feasible in your case.

Frequently asked questions

Is All-on-6 better than individual implants?

None of the solutions is absolutely superior, they respond to different clinical situations. All-on-6 is usually indicated when all or most of the teeth are missing and the bone does not allow implants in every position. Individual implants are preferred when fewer teeth are missing and the remaining bone and teeth are healthy. The right decision is made after a consultation with computed tomography, which shows exactly the available bone volume and the feasible options in your case.

How many implants are needed to replace all teeth?

An implant is not needed for each tooth. For a complete arch, the usual solutions use 4 or 6 implants (All-on-4, respectively All-on-6), on which a prosthetic work with the entire dentition is fixed. In patients with very good bone, fixed bridges can also be made on 6-8 implants distributed over the arch. The exact number is determined after the CT analysis, depending on the quality and volume of the bone.

What happens if I don't have enough bone for implants?

Lack of bone does not automatically mean that implants are impossible. With individual implants, bone deficiency can be corrected by bone addition or sinus lift, but these interventions prolong the treatment. All-on-6 solutions often avoid grafts, because the implants are strategically positioned in areas where bone exists, sometimes at an angle. That is why, for many patients with advanced bone resorption, All-on-6 is the fixed option that can be achieved without major additional interventions.

How long does the All-on-6 treatment take compared to individual implants?

With All-on-6, in many cases the patient receives a fixed provisional restoration shortly after the implants are placed, and the final restoration is performed after bone integration, usually within a few months. Multiple individual implants may take longer if bone additions are required, as each surgical step has its own healing period. The exact duration is determined in the treatment plan after a complete evaluation.

Which option is more expensive?

It depends on the number of missing teeth. When only a few teeth are missing, individual implants are naturally more affordable. When most of the teeth are missing, All-on-6 is usually more cost-effective than replacing each tooth with its own implant, because it uses fewer implants and a single procedure per arch. The final cost depends on the extractions, any bone additions, and the material of the procedure. For complete restorations, there are also payment options in installments.

How is an All-on-6 restoration cared for compared to individual implants?

Individual implants are cleaned almost like natural teeth, with brushing, flossing, and interdental brushes. With All-on-6, the area under the fixed work must be cleaned daily with a mouthwash and special brushes, techniques that we show each patient at the end of treatment. Both solutions require periodic check-ups and professional cleanings, usually every 6 months, which maintain the health of the gums and bone around the implants.

This article is for informational purposes only and is not a substitute for a professional consultation. For a personalized diagnosis and treatment plan, schedule a consultation.