Treatment Comparison

All-on-6 vs All-on-4: Which Is Right for You?

Both techniques are validated, widely-used approaches to full-arch implant reconstruction. The difference between them is not about quality — it is about bone anatomy. Here is what you need to know.

Side by Side

All-on-4 vs All-on-6: Full Comparison

Feature All-on-4 All-on-6
Number of implants 4 per arch 6 per arch
Implant angles 2 angled (30–45°) posteriors All upright / minimal angle
Bone requirement Lower — designed to avoid grafting Higher — more bone volume needed
Bone grafting Usually avoided May be required in some cases
Load distribution 4 anchor points 6 anchor points (wider spread)
Posterior coverage Posterior implants angled forward Better posterior arch coverage
UK private cost (per arch) £10,000–£20,000 £12,000–£22,000
Turkey cost (per arch) £2,500–£5,500 £3,000–£6,500
Long-term clinical data Excellent — 15+ years data Excellent — 15+ years data
Suitability assessment CT scan required CT scan required

* Cost ranges are approximate. Individual cases vary significantly. Neither technique is superior in all circumstances — suitability is determined by CT scan assessment.

The Case for All-on-6

The Clinical Argument for All-on-6

All-on-6 distributes bite forces across six implant anchor points rather than four. In the posterior (back) regions of the jaw — where the most powerful chewing forces are generated — having implants in more distal positions provides better biomechanical coverage.

For patients with adequate bone volume in all regions of the jaw, six upright implants can achieve more even load distribution than four, two of which are placed at an angle specifically to avoid the posterior region where bone may be deficient.

Some clinicians argue that the six-implant configuration is more forgiving in the event of a single implant failing — five remaining implants may be able to continue supporting the prosthesis while the failed implant is addressed, whereas a four-implant system with one failure is under higher per-implant stress.

All-on-6 is often the recommended treatment for patients who have sufficient bone and want the maximum number of anchor points for a full-arch restoration.

The Case for All-on-4

The Clinical Argument for All-on-4

All-on-4 was specifically developed to address the challenge of patients with significant posterior bone loss — a common consequence of long-term tooth loss. By placing the two rear implants at a 30–45 degree angle, the procedure avoids the anatomical structures (the maxillary sinuses in the upper jaw, the inferior alveolar nerve in the lower) that restrict vertical implant placement.

This means many patients who would otherwise require bone grafting — an additional surgery adding months to the treatment timeline and thousands to the cost — can proceed directly to All-on-4 without it.

The long-term clinical data for All-on-4 is extensive. Studies tracking patients over 10 or more years show implant survival rates comparable to conventional implant placements. All-on-4 is not a compromise technique — it is a well-validated approach that, for the right patient, is equally effective as All-on-6.

For patients with reduced bone volume in the posterior jaw, All-on-4 is often the more sensible clinical choice — avoiding the need for grafting while still achieving a fully fixed, functional full-arch restoration.

The Decision Process

Why the Choice Is Made on the Scan, Not on Your Preference

The fundamental point about the All-on-4 vs All-on-6 question is that it cannot be meaningfully answered without a CBCT (cone beam CT) scan. No honest clinician — whether in the UK, Turkey, or Hungary — should recommend one technique over the other without having reviewed three-dimensional imaging of your jaw.

The scan reveals bone density, bone height, bone width, and the proximity of anatomical structures (nerves, sinuses) that determine where implants can be placed, at what angle, and how many can be supported without grafting. These are not decisions that can be made from photographs, panoramic X-rays alone, or clinical examination without CT data.

If a clinic tells you that you need All-on-6 (or All-on-4) before they have taken a CBCT scan, treat this with caution. The technique should be matched to your anatomy — not the other way around.

The right treatment is the one your bone anatomy supports — not the one with the higher or lower price tag, or the one the clinic happens to prefer offering.

Shared Characteristics

What All-on-4 and All-on-6 Have in Common

Fixed prosthesis

Both result in a non-removable, permanently attached full-arch prosthesis. Neither can be taken in or out by the patient.

Same prosthesis materials

Both support acrylic, zirconia, and hybrid prosthesis options. The material choice affects cost, durability, and aesthetics independently of the implant technique.

Same recovery timeline

Both require a healing and osseointegration period of 3–6 months. Both typically involve a two-trip model for overseas treatment.

Same maintenance requirements

Both require the same daily cleaning routine: soft toothbrush, interdental brushes, water flosser, and regular professional hygienist visits.

CT scan required for both

Neither can be properly assessed or planned without a CBCT scan. This applies whether you are treated in the UK or abroad.

Long-term clinical validation

Both techniques have 15+ years of clinical data demonstrating high implant survival rates when performed by experienced surgeons in suitable patients.

All-on-4 vs All-on-6 Questions

Common Questions

Can I choose between All-on-4 and All-on-6, or does the dentist decide?
In practice, the dentist — specifically the implant surgeon reviewing your CBCT scan — determines which technique is clinically appropriate for your bone volume and anatomy. A patient's preference is a factor, but it cannot override bone anatomy. If your bone volume is insufficient for six upright implants, All-on-4 (with its angled configuration) may be the only viable option without bone grafting. If bone volume is adequate, either technique may be suitable, and cost or other preferences may then enter the conversation.
Is All-on-6 stronger than All-on-4?
All-on-6 distributes bite forces across six implants rather than four, which reduces the load per implant. Whether this results in a meaningfully 'stronger' clinical outcome over time is debated in the literature. Both techniques have demonstrated excellent long-term outcomes in clinical studies. The difference in load per implant is more relevant in the context of very high bite forces (bruxism) or patients with bone quality concerns.
Do both treatments use the same type of prosthesis?
Yes. Both All-on-4 and All-on-6 support the same types of full-arch prostheses — acrylic resin or zirconia (ceramic). The prosthesis material options, aesthetic outcomes, and maintenance requirements are identical regardless of whether four or six implants are used.
Can I switch from All-on-4 to All-on-6 later?
Adding implants after an initial All-on-4 treatment is technically possible but involves additional surgery, cost, and healing time. It is not a standard procedure and would require assessment of existing bone and implant positions. It is far simpler to choose the right technique at the outset based on a thorough CT scan assessment.
Do both require two trips if treated abroad?
Yes. Whether the treatment is All-on-4 or All-on-6, the same two-trip model applies: Trip 1 for surgery and temporary prosthesis, and Trip 2 (after osseointegration) for the final prosthesis fitting. The healing period between trips is the same for both techniques.

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