If you have been researching full-arch dental implants, you have probably noticed that every clinic recommends a different procedure — and the recommendation usually matches whichever procedure that clinic does most. This guide gives the genuine clinical answer to All-on-4 vs All-on-6 vs 3-on-6 for UK patients in 2026: how the three procedures differ structurally, the six clinical factors that decide which one suits your case, anonymised CBCT examples from real cases, and the cost reality across both UK private dentistry and Antalya.
The three procedures, structurally explained
All three procedures replace a full arch of teeth (upper, lower, or both) using a fixed prosthesis supported by implants. The differences are in the number of implants and how the prosthesis is constructed on top of them.
All-on-4
Four implants per arch — two placed vertically at the front of the jaw, two tilted at angles in the back to avoid the sinus cavity (upper) or inferior alveolar nerve (lower). A single monolithic 10- to 12-tooth bridge is fitted on top. The tilted posterior implants distribute bite force forward without requiring bone grafts. Developed by Paulo Maló in the late 1990s, with strong 15-year published outcomes.
All-on-6
Six implants per arch — typically four vertical and two tilted, or six vertical in cases with sufficient bone volume throughout the jaw. A single monolithic 12-tooth bridge sits on all six. More implants means broader load distribution but requires more bone, more surgical time, and is more expensive per arch.
3-on-6
Six implants per arch, but the prosthesis is split into three separate four-tooth bridges instead of one continuous 12-unit bridge. Each bridge sits on two implants. The aesthetic result is identical to All-on-6, but the engineering differs: bite force is distributed across three independent units, and individual sections can be repaired or replaced without removing the entire prosthesis.
| Procedure | Implants per arch | Prosthesis structure | Bone requirement | Repair complexity |
|---|---|---|---|---|
| All-on-4 | 4 (2 vertical + 2 tilted) | One 10–12 tooth bridge | Minimal (tilted implants avoid grafting) | Full bridge removal |
| All-on-6 | 6 (typically 4+2 tilted, or 6 vertical) | One 12 tooth bridge | Moderate | Full bridge removal |
| 3-on-6 | 6 (typically all vertical) | Three 4 tooth bridges | Moderate to good | Single section only |
The six clinical factors that decide which procedure suits you
No two patients have the same jaw. The right procedure for your case depends on the realistic clinical picture, not the clinic’s preferred protocol. Here are the six factors that a CBCT scan and oral examination reveal, and how each pushes the decision.
Factor 1 — Bone volume in the posterior jaw
This is the single biggest decider. If you have lost significant bone at the back of the upper jaw (under the sinus) or lower jaw (above the nerve), placing vertical posterior implants is either impossible without bone grafting or risks nerve damage. All-on-4’s tilted posterior implants avoid these zones entirely.
- Severe posterior bone loss: All-on-4 is usually the correct procedure
- Moderate bone loss: All-on-6 with mixed tilted/vertical placement
- Good bone throughout: All three are options; 3-on-6 becomes preferred for long-term repairability
Factor 2 — Anterior jaw shape and width
The four to six anterior positions all need adequate ridge width to support a 4mm or 5mm diameter implant. A narrow ridge can be widened with bone graft material, but this adds healing time and cost.
Factor 3 — Bite force and bruxism (grinding)
Patients who grind or clench heavily put greater stress on implants and the prosthesis. The single long bridge in All-on-4 or All-on-6 has stress concentration points at the joins; the three-piece 3-on-6 distributes that stress across three independent units and is repairable without taking the whole arch out.
- Confirmed bruxism with night guard compliance: 3-on-6 preferred
- Heavy bruxism without night guard compliance: consider 3-on-6 plus mandatory custom night guard, or reconsider full-arch entirely
Factor 4 — Opposing dentition
If you are placing a full-arch implant bridge in one jaw, what is in the opposing jaw matters significantly. A natural opposing dentition produces stronger and more variable bite forces than a denture or another full-arch bridge.
- Natural opposing teeth: 3-on-6 or All-on-6 preferred (better load distribution)
- Opposing denture or another implant bridge: All-on-4 is usually adequate
Factor 5 — Smoking status
Smoking roughly doubles implant failure risk. Patients who smoke benefit from the redundancy of more implants — losing one implant in an All-on-4 case is a serious problem, whereas losing one in a 3-on-6 case can sometimes be managed without remaking the whole prosthesis.
- Non-smoker or quitting confirmed: All three procedures viable
- Current smoker: All-on-6 or 3-on-6 preferred for redundancy; All-on-4 carries higher cumulative risk
Factor 6 — Budget and long-term maintenance preferences
Cost matters, but so does the maintenance trajectory. All-on-4 has the lowest upfront cost. 3-on-6 has a slightly higher upfront cost but lower long-term repair cost because individual sections can be replaced. Over a 15-year horizon, total cost of ownership is often similar.
Decision matrix — which procedure for which case
Combining the six factors above into a working decision matrix used in case planning:
| Patient profile | Recommended procedure | Rationale |
|---|---|---|
| Severe posterior bone loss, non-smoker, opposing denture | All-on-4 | Tilted implants avoid grafting; minimal bone requirement; adequate for denture opposition |
| Moderate bone, current smoker, opposing natural teeth | All-on-6 | Six implants provide redundancy for smoking risk; broader load distribution for natural opposing dentition |
| Good bone, non-smoker, confirmed bruxism, opposing natural teeth, long-term thinking | 3-on-6 | Three-section design distributes grinding forces; individual section repair preserves rest of arch over 15+ years |
| Severe posterior bone loss AND opposing natural teeth AND bruxism | Case-by-case — sometimes All-on-6 with bone grafting, sometimes All-on-4 plus night guard | The factors conflict; CBCT and clinical judgement decide |
| Limited budget, willing to accept full bridge replacement if section fails years later | All-on-4 | Lowest upfront cost; full replacement years later still cheaper than All-on-6 upfront in some markets |
| Wants the most defensible long-term option, budget flexible | 3-on-6 | Best repairability, best load distribution, modern preferred protocol when bone allows |
Anonymised CBCT examples — three real cases
To make this concrete, here are three anonymised cases from UK patients treated in Antalya. Identifying details removed, clinical detail kept.
Case A — 58-year-old male, Birmingham
Presented with failing upper teeth (severe periodontal disease, multiple extractions needed), opposing lower full denture, 25-year smoker (six per day), no bruxism. CBCT showed severe posterior maxillary bone loss bilaterally with sinus pneumatisation. Procedure: All-on-4 upper arch. Tilted posterior implants placed anterior to the sinus walls; no bone graft required. Recovery uneventful; final bridge fitted at 4 months. The choice was driven by Factor 1 (severe posterior bone loss made vertical posterior implants unsafe without grafting) and Factor 4 (denture opposition meant fewer implants were adequate).
Case B — 51-year-old female, Manchester
Presented with multiple failing root canals in the lower arch, opposing upper natural dentition with healthy gums, no smoking, confirmed mild bruxism with existing night guard. CBCT showed adequate bone volume throughout the lower jaw including posterior regions. Procedure: 3-on-6 lower arch. Six vertical implants placed; three four-tooth bridges fitted. The choice was driven by Factor 3 (bruxism — three-piece design distributes grinding stress), Factor 4 (natural opposing teeth — broader load distribution preferred), and Factor 1 (good bone made the more elegant six-implant approach viable).
Case C — 64-year-old male, Belfast
Presented with severe wear of both arches over decades of heavy bruxism, multiple failing crowns and bridges, no smoking, opposing arches both needing reconstruction. Heavy clenching documented by a UK dentist. CBCT showed moderate bone loss in upper posterior bilaterally, adequate bone in lower. Procedure: 3-on-6 lower arch + All-on-6 upper arch with mixed tilted/vertical posterior implants. The case combined two procedures because each arch had different clinical characteristics. The 3-on-6 protected the lower bridge from the patient’s known heavy bite forces; the All-on-6 upper offered broader load distribution where bone allowed.
Cost reality — the three procedures compared
The honest 2026 cost picture across UK private dentistry and Antalya:
| Procedure (per arch) | UK private (regional) | UK private (London) | Antalya all-inclusive |
|---|---|---|---|
| All-on-4 | £12,000–£20,000 | £16,000–£26,000 | £3,500–£5,200 |
| All-on-6 | £14,000–£22,000 | £18,000–£28,000 | £3,800–£5,500 |
| 3-on-6 | £16,000–£24,000 | £20,000–£30,000 | £4,200–£6,000 |
| Both arches All-on-4 | £24,000–£40,000 | £32,000–£52,000 | £7,000–£10,200 |
| Both arches All-on-6 | £28,000–£44,000 | £36,000–£56,000 | £7,600–£11,000 |
| Both arches 3-on-6 | £32,000–£48,000 | £40,000–£60,000 | £8,400–£12,000 |
In Turkey, the cost difference between the three procedures is small enough that it should rarely be the deciding factor — the clinical fit should be. In UK private dentistry, the cost difference is large enough that some patients are pushed toward All-on-4 purely on price, even when their clinical picture would favour 3-on-6.
Why we do not recommend All-on-4 by default
Many clinics — both in the UK and in Turkey — recommend All-on-4 to almost every full-arch patient. The protocol is genuinely effective in its intended indication (severe posterior bone loss, denture opposition, single-trip workflow). It is also the protocol that produces the highest margin and shortest chair time, which creates a commercial incentive to over-recommend it.
The honest clinical reality is this: All-on-4 is the right answer when posterior bone is missing and grafting is undesirable. In every other scenario, more implants and better load distribution produce better long-term outcomes. This is also the position taken by the British Society of Periodontology and reflected in the General Dental Council’s guidance on informed consent for implant treatment.
If the only procedure offered to you is All-on-4 and your CBCT has not been reviewed in detail, you have not received a complete treatment plan — regardless of which country the clinic is in.
How the treatment unfolds — both trips, all three procedures
The patient journey is broadly similar across all three procedures:
- Pre-trip: Panoramic X-ray review (or CBCT taken on day one in Antalya), written treatment plan, deposit
- Trip 1 (5–7 days): CBCT scan, consultation, extractions and implant placement under local anaesthetic with optional sedation, temporary bridge or temporaries fitted before flying home
- Healing at home (3–6 months): Osseointegration, soft diet for first weeks, normal life otherwise, WhatsApp aftercare contact
- Trip 2 (3–5 days): Final impressions, fitting of final zirconia or porcelain-fused-to-metal bridge or bridges
Each trip is anchored by Antalya International Airport (AYT), with direct flight options from London Stansted, Manchester, Birmingham, Belfast, Edinburgh, Glasgow, and Cardiff for most of the year.
Frequently asked questions about All-on-4 vs All-on-6 vs 3-on-6
Which procedure has the highest long-term success rate?
Published 10-year survival rates are similar across all three (95–98%) when the procedure is matched correctly to the patient. The 15-year and 20-year data slightly favours 3-on-6 due to better load distribution and easier repairability, but the evidence base for the older protocols is longer. Procedure-to-patient fit matters more than choosing the “best” procedure abstractly.
Can I switch from All-on-4 to All-on-6 if my case changes?
Adding implants to an existing All-on-4 case is technically possible but uncommon — usually the existing prosthesis would need replacement and the new implants placed where bone allows. It is far more practical to choose the correct procedure at the outset based on CBCT planning.
Is 3-on-6 worth the extra cost compared to All-on-6 in Turkey?
In Antalya, the cost difference between All-on-6 and 3-on-6 is typically £400–£700 per arch. Over a 15-year horizon, the repair savings if any single section fails usually exceed that difference. For patients with bruxism or natural opposing teeth, 3-on-6 is usually the better long-term value.
What if my UK dentist recommends a different procedure to my Antalya clinic?
Ask both to write down their rationale referencing the CBCT findings, your specific bone volumes, and the factors above. Differences of opinion usually narrow when both clinicians are working from the same imaging and using the same decision framework. Genuine differences of opinion exist in implantology and a second opinion is reasonable — but it should be a comparison of rationales, not just procedures.
How many implants do I actually need?
It depends on the six factors in this guide, applied to your specific case via a CBCT scan. As a rough heuristic: severe posterior bone loss usually means four implants per arch; moderate bone with natural opposing teeth usually means six; good bone with bruxism usually means six with the three-piece 3-on-6 prosthesis design. Only a CBCT-based clinical plan gives the actual answer.
The bottom line on full-arch implant procedure selection
The right procedure for your case is the one that matches your clinical picture — not the one the clinic does most. The six factors above are what a thorough Antalya clinic should walk you through, and the CBCT scan is what makes the conversation real rather than speculative. If you have not been shown your own scan and walked through the rationale, the treatment plan is incomplete.
For a free written assessment based on a panoramic X-ray or CBCT scan, you can contact our clinical team, see UK patient outcomes on the reviews page, check transparent pricing on the pricing page, or read more detail on the specific procedures: 3 on 6 dental implants Turkey guide, All-on-4 in Turkey complete guide, and dental implant cost 2026 breakdown.
