All-on-4 vs All-on-6 full-arch implants in Nador, Morocco
· Dr. Imad Al Morabit
All-on-4 rebuilds a full arch on four implants, All-on-6 on six. The right number is not a marketing label but a clinical decision based on bone volume, the jaw involved and how the chewing load is spread. At Dr Imad Al Morabit's clinic in Nador, 3D diagnostics and digital planning settle the question case by case, before you travel.
What All-on-4 and All-on-6 actually mean
All-on-4 and All-on-6 are two versions of the same idea: replacing a full arch of teeth with a single fixed bridge supported by implants, instead of a removable denture. The number in the name is simply the number of implants that carry the bridge, four or six. In both cases the result is a complete set of fixed teeth that you do not take out, screwed onto titanium roots placed in the jawbone.
The implant is a titanium screw that the bone gradually integrates, a process called osseointegration that usually takes a few months. At the clinic we use Biotech Kontact implants exclusively, a French manufacturer with documented traceability: every implant is recorded with its batch number and carries the CE mark, so a dentist in Europe can identify it later if needed. The bridge itself is designed and milled in our in-house digital lab, from German and Japanese materials chosen for their documented reliability rather than a vague quality slogan.
The real differences between four and six implants
The core difference is how the chewing load is distributed. With All-on-4, two implants are usually placed straight at the front of the jaw and two tilted at the back, which lets the surgeon use the available bone and often avoid a graft. With All-on-6, two extra implants add support points along the arch, which spreads the mechanical load over more roots and can shorten the unsupported span of the bridge.
There is also a margin-of-safety dimension that deserves honesty. With six implants, if one were ever to fail over the years, the bridge can in many cases still be supported by the remaining ones while a solution is found. With four implants, each one carries a larger share of the work, so the planning has to be more precise. Neither option is universally better. All-on-4 can be the smart, less invasive choice when the bone is suitable, while All-on-6 makes sense when there is enough bone and a need to maximise load distribution. The table below summarises the practical contrasts.
| Criterion | All-on-4 | All-on-6 |
|---|---|---|
| Number of implants | Four per arch | Six per arch |
| Load distribution | Concentrated on four roots, back implants often tilted | Spread over six roots, shorter unsupported span |
| Bone volume needed | Works with more limited bone, graft often avoided | Needs more available bone or a prior graft |
| Typical jaw | Often suited to the lower jaw, and to the upper when bone allows | Often preferred for the upper jaw or demanding cases |
| Margin if a complication occurs | Smaller, planning must be very precise | Larger, the bridge can often rely on remaining implants |
| Invasiveness and cost | Generally less invasive, fewer implants | More implants, usually a higher overall cost |
Bone volume and the jaw involved decide a lot
The upper and lower jaws do not behave the same way. The lower jaw is generally denser, which often makes four well-positioned implants a solid choice. The upper jaw is softer and sits close to the sinus cavities, so it frequently benefits from the extra support of six implants, or from a sinus lift to recreate bone volume before placing them. This is a clinical reality, not a preference.
When a tooth or several teeth have been missing for a long time, the bone underneath shrinks. That is why a bone graft or sinus lift is sometimes needed before, or at the same time as, implant placement. It is not systematic, and digital planning lets us identify it in advance and tell you honestly before you travel. The grafting materials, when required, are chosen from German and Japanese references selected for their documented quality.
Why 3D diagnostics and digital planning settle the choice
The decision between All-on-4 and All-on-6 is not made by guesswork at the chair. It rests on a CBCT scan, a three-dimensional X-ray that shows the exact bone volume, density and the position of nerves and sinuses. From that scan, Dr Imad plans where each implant will go, at what angle and with what length, and the in-house lab can produce a surgical guide so the placement matches the plan precisely. Dr Imad is both a dentist and a software engineer, with a university diploma in implantology from Toulouse, which is why this planning-first, digital approach is at the heart of how the clinic works.
The lab uses Exocad, 3Shape, intraoral scanners and on-site milling and 3D printing. Concretely, much of the work happens before you even leave Europe: from a panoramic X-ray or a CBCT taken locally, a detailed plan is drawn up, the feasibility of four versus six implants is assessed, and the length of your stay is calibrated. You can send your X-ray by WhatsApp beforehand for a free preliminary opinion, usually within 24 hours, so you arrive with a validated plan rather than open questions.
How the treatment is organised around your stay
For a patient living in Europe, a full-arch rehabilitation usually unfolds over two stays a few months apart, whether the plan is All-on-4 or All-on-6. The first stay is dedicated to placing the implants, and to a graft or sinus lift if the plan calls for one. The second stay, once osseointegration is confirmed, is when the final fixed bridge is fitted. The protocol is built around your trip so each stay stays as short as the case allows.
In many favourable cases, a fixed temporary bridge can be fitted on the day of surgery, an approach often described as immediate loading, so you do not leave without teeth. This depends on the implants being stable enough at placement and is decided case by case, never as a systematic protocol that would compromise the result. Between the two stays, follow-up is remote by WhatsApp and video if needed, with X-ray checks shared online. Dr Imad also holds a university diploma in smile esthetics from Strasbourg, so the look of the final teeth is followed as closely as the function.
Cost, an honest word of caution, and who decides
All-on-6 involves more implants and usually a higher overall cost than All-on-4, but cost should never drive the clinical choice on its own. As an external market reference only, full-arch solutions in Western Europe are frequently quoted in the tens of thousands of euros per arch; that figure is given purely for context and is not the clinic's price. The clinic does not publish a fixed price because every mouth is different. After your consultation you receive a free, personalised written quote, usually within 24 hours.
A fair warning belongs here. The market has very low-cost full-arch offers with no 3D planning, no brand traceability and no structured follow-up. The problem is not the price itself but what gets sacrificed to reach it. A poorly distributed load or a failed implant costs far more to deal with than a case that was well planned from the start. We do not make absolute promises: under appropriate anaesthetic the surgery involves controlled discomfort, and we explain the realistic recovery honestly instead of overselling the comfort.
Finally, the choice between All-on-4 and All-on-6 is a clinical decision, not a menu you pick from. It is the clinician who decides, based on your scan, your bone, the jaw involved, your bite and your general health. The clinic open since 2017 is set up to make that decision transparently, with the imaging and planning to back it up, so you understand why one option fits your case better than the other.
Frequently asked questions
Is All-on-6 always better than All-on-4?
No. More implants is not automatically better. All-on-6 spreads the load over more roots and leaves a larger safety margin, but it needs more bone and is more invasive and costly. All-on-4 can be the smarter, less invasive choice when the bone is suitable, especially in the lower jaw. The right number depends on your scan and your specific case, which is exactly what the digital planning is for.
Which is recommended for the upper jaw versus the lower jaw?
As a general tendency, the lower jaw is denser and often well served by four well-positioned implants, while the softer upper jaw, close to the sinuses, frequently benefits from six implants or a sinus lift first. This is a tendency, not a rule. The CBCT scan shows the real bone volume in your case and lets Dr Imad decide what is genuinely indicated for each jaw.
Will I need a bone graft for a full arch?
Not always. It depends on how much bone you have left, which the CBCT scan reveals. If a graft or a sinus lift is needed, it is planned in advance and usually performed during the first stay. Digital planning lets us anticipate this and tell you honestly before you travel, so the length of your stay is calibrated correctly and there are no surprises.
Can I leave with fixed teeth on the day of surgery?
In many favourable cases, yes, a fixed temporary bridge can be fitted the same day, an approach often called immediate loading, so you are not without teeth. It depends on the implants being stable enough at placement and is decided case by case. It does not shorten the osseointegration time, but it improves comfort and appearance between the two stays.
What does an All-on-4 or All-on-6 cost at the clinic?
The cost varies with the number of implants, whether a graft or sinus lift is needed, the materials and the complexity of the case, so the clinic does not publish a fixed price. For context only, full-arch treatment in Western Europe is often quoted in the tens of thousands of euros per arch, which is not the clinic's price. Send your X-rays by WhatsApp for a free, personalised quote, usually within 24 hours.
How many stays should I plan, and how is follow-up handled?
Most full-arch cases need two stays a few months apart: one to place the implants, one to fit the final bridge after osseointegration. Each stay usually lasts a few days, calibrated by the planning done before you arrive. Between and after the stays, follow-up is remote by WhatsApp, with shared X-rays and a video consultation if needed, which is what reassures diaspora patients who cannot come back every week.
Choosing between All-on-4 and All-on-6 is not about picking the bigger number, it is about matching the solution to your bone, your jaw and your bite. Well planned with a 3D scan, well placed and well followed up, a full-arch rehabilitation can give you back fixed teeth that last for years. If you live in Europe or abroad and want to know which option fits your case, the first step is simple: send your panoramic X-ray or CBCT by WhatsApp. Dr Imad will give you an honest opinion and a clear idea of what the treatment involves, in stays as much as budget. No commitment, just a clear answer, with a free consultation and a personalised quote within 24 hours.