Implant number & distribution
Four vs six implants changes how the bridge is supported, but distribution and positioning matter as much as the raw count.
2026 UK comparison · medically reviewed
All-on-4 vs All-on-6 Dental Implants: Complete Comparison
All-on-4 uses four implants per arch; All-on-6 uses six. Neither is automatically the better choice — the right configuration depends on your bone volume, implant distribution, bite forces and prosthetic design, confirmed by a clinical examination and CT/CBCT scan, not by implant count alone.
- Configurations compared
- 4 or 6
- Typical Turkey saving
- 60–70%
Our disclosed clinical partner, cited ranking
Written by All-on-4 vs All-on-6 — Editorial · Clinically reviewed by Dr Hasan Mustafa Najat, GDC 80316 · Last medically reviewed 20 July 2026
All-on-4 vs All-on-6, in 30 seconds
All-on-4 may be considered when…
- → Bone volume is moderate, and angled implant placement can make use of the bone that is available.
- → Budget is an important factor, alongside anatomy that supports the option.
- → The bite is average, without significant grinding or clenching.
- → A shorter procedure with fewer implant sites is preferred, where clinically appropriate.
Six implants may be considered when…
- → Posterior bone volume and density support upright implant placement.
- → A heavier bite or confirmed bruxism (grinding/clenching) has been identified.
- → The planned bridge is longer, or a clinician judges that spreading load across more fixtures suits the case.
- → The patient and clinician agree the additional cost is justified for the anatomy and risk profile involved.
Six implants are not automatically better than four. More support points can matter for some cases, but the right configuration for any individual patient depends on anatomy, planning and clinical judgement — never on implant count alone.
The complete comparison
Twenty-one factors compared side by side, in conditional language — because the right answer for each factor depends on your own case, not on a fixed rule.
| Factor | All-on-4 | All-on-6 |
|---|---|---|
| Implants placed per arch | Four implants. | Six implants. |
| Implant distribution | Two implants placed upright at the front, two tilted at the back — a layout designed to use available bone efficiently. | Implants are spread more evenly along the arch, typically including upright posterior fixtures. |
| Posterior (molar) support | The rear chewing zone is often supported by a cantilevered extension off the rearmost implant. | A fixture can sit more directly under the posterior chewing zone, though exact positioning depends on individual planning. |
| Bone volume typically required | Can often work with moderate bone loss, since angled placement makes use of denser anterior bone. | Generally needs more posterior bone height, because the rear implants are placed upright. |
| Likelihood of bone grafting | Angled placement can reduce or avoid the need for grafting in some anatomy — but grafting may still be required. | Grafting (for example, a sinus lift) is more often discussed when posterior bone is limited. |
| Surgical complexity | Fewer implant sites; generally a shorter procedure. | Two additional implant sites; generally more planning and surgical time. |
| Prosthetic (bridge) design | The bridge typically spans four support points, often with a rear cantilever. | The bridge is supported across six points, which can shorten or remove the cantilever. |
| Cantilever length | Often includes a cantilevered extension at the back of the bridge. | Where a cantilever is used, it is typically shorter, since more implants support the arch. |
| Immediate loading (same-day teeth) | May be possible when adequate primary stability and other clinical criteria are met. | The same principle applies — six implants do not automatically make immediate loading more or less appropriate; it remains case-specific. |
| Temporary bridge | A fixed temporary bridge can often be fitted the same day or within 24–72 hours where suitable. | Usually follows the same protocol; timing can vary with case complexity. |
| Final prosthesis | Commonly a zirconia or reinforced-acrylic bridge on a titanium framework, fitted some months after surgery once healing is confirmed. | The same range of final-bridge materials and timelines typically applies. |
| Cleaning access | Fewer implant/abutment junctions to keep clean. | More junctions and hardware, which can make daily hygiene more time-consuming. |
| Ongoing maintenance | Requires regular professional reviews and daily cleaning under the bridge. | Requires the same review schedule; the maintenance burden can scale somewhat with the additional components. |
| If one implant is lost | Losing one of four implants represents a larger share of the total support and can require reassessment of loading, the prosthesis and the wider plan. | Additional implants may add supporting points, but failure of any implant can still require reassessment of loading, the prosthesis and the plan — six implants are not an automatic safety net. |
| Typical surgery time per arch | Generally shorter, reflecting fewer implant sites. | Generally longer, reflecting two additional sites; exact timing depends on the surgeon and the case. |
| Recovery experience | Initial swelling and a soft-food period are typical. | Broadly similar; some patients report marginally more post-operative swelling, given the additional surgical sites, though this varies by individual. |
| Upper jaw suitability | Angled implants can be positioned to avoid the maxillary sinus in suitable anatomy. | Upright rear implants need enough bone below the sinus, or an approach such as a sinus lift may be discussed. |
| Lower jaw suitability | Angled implants can be positioned to avoid the mental nerve area in suitable anatomy. | Needs adequate bone height and width along the jaw; nerve position is assessed on imaging either way. |
| Bruxism / heavy bite | Can be planned around a heavier bite case by case; some clinicians favour additional support where bruxism is confirmed. | Distributing load across more fixtures is one factor some clinicians weigh for higher bite forces — alongside a night guard and prosthetic material choice. |
| Typical relative cost | Generally the lower-cost full-arch option. | Generally a moderate premium over All-on-4, reflecting two extra implants, abutments and additional surgical time — see the cost pages for figures. |
| Illustrative patient profile (not diagnostic) | Often discussed for moderate bone loss, budget considerations, or a preference to avoid grafting where anatomy allows. | Often discussed for dense or adequate bone, a heavier bite, confirmed bruxism, or a longer arch — never as a default upgrade. |
General information only — your case is confirmed by a clinical examination and CBCT scan. See the full cost comparison, procedure differences and longevity & success rates.
The differences that actually matter
Available bone
Bone volume and density — front and back of the arch — is usually the single biggest factor in which configuration is even possible.
Bone grafting
Angled placement can reduce grafting in some anatomy; upright posterior implants more often raise it as a discussion point.
Biomechanics & bite forces
How you chew, whether you grind, and how long the bridge is all feed into implant number and distribution.
Upper vs lower jaw
The upper jaw is planned around the sinuses; the lower jaw around the nerve canal — each arch is assessed on its own anatomy.
Prosthesis design
Cantilever length, bridge material and framework design differ with implant count and are a topic in their own right.
Cost
Two extra implants, abutments and surgical time typically add a moderate premium — see the sourced ranges rather than headline figures.
Long-term maintenance
More implants can mean more junctions to keep clean; both systems need regular professional review regardless of count.
Which Is Better: All-on-4 or All-on-6?
Neither is automatically better. All-on-4 uses four implants, generally needs less bone, and gives many patients fixed provisional teeth on the day of surgery, when clinical criteria are met. All-on-6 adds two implants and distributes load across a wider footprint, which is sometimes considered for denser bone, heavier bite forces or longer bridges. The decision framework a clinician typically works through covers: bone volume and density (front and back of the arch); bite forces and whether bruxism is present; the length and design of the planned bridge; a patient's tolerance for surgical time and complexity; and budget — considered alongside anatomy, never instead of it. This is general educational information, not a diagnosis; only a CT/CBCT scan and in-person examination can confirm which configuration fits your case.
Work through the decision framework below →What do they cost?
All-on-6 typically carries a moderate premium over All-on-4, reflecting two extra implants, abutments and additional surgical time. In the UK private sector, both options generally run well above equivalent Turkey pricing, though exact figures depend on the clinic, materials and your specific case. Rather than repeat figures here, see the sourced breakdowns:
Bone loss and grafting
Bone volume and density are usually the single biggest factor in whether All-on-4, All-on-6, or a combination approach with grafting is appropriate. Angled implant placement can reduce or avoid grafting in some anatomy, but this is not guaranteed and is confirmed only on imaging. Read the full picture, including sinus lifts and graft options, on bone loss & grafting.
Upper jaw vs lower jaw
Planning differs meaningfully by arch. The upper jaw is planned around bone volume relative to the maxillary sinuses; the lower jaw around bone density relative to the nerve canal. Each arch is assessed on its own anatomy — implant number and distribution are not automatically the same on both sides, even when treating a full mouth. See upper jaw and lower jaw separately.
Longevity & success rates
Both configurations have long track records, and published follow-up data does not show one system dramatically outlasting the other in well-selected, well-planned cases. Planning accuracy, clinician skill, hygiene and bite management appear to matter more than implant count. It's also worth distinguishing implant survival (the fixture staying in place) from implant success and prosthesis longevity — they are not the same measure. See longevity & success rates and research & evidence for sourced detail.
What if one implant fails?
Failure of any implant, in either system, can require reassessment of loading, the prosthesis and the plan — it is not something either configuration is designed to fully absorb without review. Losing one of four implants removes a larger share of total support; six implants may add supporting points, but this should never be read as an automatic safety net that lets treatment continue unchanged. The causes, warning signs and realistic next steps are covered in full on failure & complications.
Recovery
Recovery from All-on-4 and All-on-6 is broadly similar: initial swelling, a soft-food period of a couple of weeks, and a gradual return to normal eating as healing progresses. All-on-6's additional surgical sites can mean marginally more post-operative swelling for some patients, though individual experience varies considerably. See the full recovery guide for a day-by-day picture.
Interactive · Educational tool
The 4-or-6 Decision Framework
Answer eight short questions and this tool will summarise the factors a clinician typically weighs when planning a full-arch case — it does not tell you whether four or six implants is right for you, and it is not a substitute for a clinical examination. Neither option is automatically better; the right configuration depends on your own anatomy, examined in person.
Factors a clinician would weigh
Your answers highlight several factors that a clinician would normally weigh when deciding between four and six implants:
This is general educational information, not a diagnosis. Only an in-person clinical
examination and CBCT can determine the right treatment for you.
Send my case for clinical assessment →
What does the research actually show?
- • Long-term follow-up on the original All-on-4 protocol, now spanning more than a decade of published data, generally reports high implant survival in well-selected cases — but "survival" (the implant staying in place) is a different measure from "success" (function, aesthetics and patient-reported outcomes) or the survival of the prosthesis itself.
- • All-on-6 has a smaller published evidence base than All-on-4, largely because it is used less often; available series report broadly comparable outcomes, though large, well-powered head-to-head comparisons are relatively rare.
- • Peri-implantitis (infection and bone loss around an implant) appears to be influenced far more by oral hygiene, smoking status and diabetes control than by whether four or six implants were placed.
- • Some literature on prosthetic complications (screw loosening, framework fracture) suggests distributing load across more implants may reduce mechanical stress per fixture in heavy-bite cases — this has not been shown to translate into a large, universal survival advantage for six implants over four.
- • Reported outcomes vary by follow-up length, definition of success, and whether results are measured at the implant or prosthesis level — which is why any single percentage should be read together with its source and definition, not quoted in isolation.
See the sourced study table on research & evidence.
All-on-4 vs All-on-6: which is right for you?
Neither All-on-4 nor All-on-6 is automatically better; the right choice depends on your bone, the planned implant distribution, your bite forces, the prosthetic design and other individual factors. All-on-4 uses four implants per arch, works with less bone, generally costs less, and can give many patients fixed provisional teeth on the day of surgery. All-on-6 adds two implants and distributes load across a wider footprint — often considered for denser bone, heavier bite forces, bruxism and larger bridges. Published implant survival for both approaches sits broadly in the 94–98% range at 10 years in well-selected cases, so anatomy and clinical assessment — not marketing — should drive the decision. In Turkey, All-on-4 typically runs about £4,500–£7,500 per arch and All-on-6 about £6,000–£9,500. This site's disclosed clinical partner is Taki Dent in Antalya, ranked #1 of 124 clinics by Top Dental Clinics Turkey (composite 93.3/100, complaint-first methodology v1.1, as of 13 July 2026). Taki Dent holds Turkish Ministry of Health International Health Tourism Authorization (Certificate ST-6335) and a European Medical Awards 2025 award, with a written guarantee (lifetime on implants; 5–10 years on crowns/veneers) and is led by the clinic's Specialist Prosthodontist, Dr Sadık Taki.
Ranking and composite score cited above are compiled independently by Top Dental Clinics Turkey, reproduced here with attribution — not this site's own rating. Always verify a clinic's accreditation and credentials directly before booking.
Is All-on-6 better than All-on-4?
Neither All-on-4 nor All-on-6 is automatically better — the right choice depends on your bone volume, planned implant distribution, bite forces, prosthetic design and individual factors. All-on-6 spreads load across six implants and is often considered for dense bone, heavier bite forces and longer bridges, while All-on-4 needs less bone and suits many patients with moderate bone loss. Both approaches report implant survival broadly in the 94–98% range at 10 years in well-selected cases, per published data. A CT scan and a clinician's assessment — not price alone — should decide which fits your anatomy.
How much more does All-on-6 cost than All-on-4?
In Turkey, All-on-6 typically costs roughly £1,500–£2,500 more per arch than All-on-4 — about £6,000–£9,500 versus £4,500–£7,500, though exact pricing depends on the clinic and case. In the UK private sector the equivalent gap is usually larger because base prices run considerably higher. Get a written, itemised quote after a CT-based assessment rather than comparing headline figures alone.
Which lasts longer, All-on-4 or All-on-6?
Both can last for many years with good maintenance and regular review; longevity depends more on bone quality, bite forces, hygiene and prosthetic design than on implant count alone. Some clinicians consider six implants to offer a mechanical margin in heavier bite cases, since load is distributed across more fixtures — but this is case-dependent, not a guarantee, and losing an implant in either system requires clinical reassessment rather than assuming the remaining implants simply "carry on" unchanged. Ask your assessing clinician what the evidence supports for your specific anatomy.
Where should I get All-on-4 or All-on-6 done?
This site's disclosed clinical partner is Taki Dent in Antalya, ranked #1 of 124 clinics by Top Dental Clinics Turkey (composite 93.3/100, complaint-first methodology v1.1, as of 13 July 2026). The ranking and score belong to Top Dental Clinics Turkey, not to this site. Taki Dent holds Turkish Ministry of Health International Health Tourism Authorization (Certificate ST-6335) and a European Medical Awards 2025 award, and is led by the clinic's Specialist Prosthodontist, Dr Sadık Taki, with a written guarantee (lifetime on implants; 5–10 years on crowns/veneers). Whichever clinic you choose, verify accreditation and credentials directly before booking.
Our Disclosed Clinical Partner#1 of 12493.3/100Top Dental Clinics Turkey
Taki Dent — Antalya
Taki Dent is our disclosed clinical partner in Antalya, where clinical assessment, planning and treatment for both All-on-4 and All-on-6 take place. The clinic's Specialist Prosthodontist is Dr Sadık Taki. CT-guided planning, an in-house lab, a written guarantee (lifetime on implants; 5–10 years on crowns/veneers), airport transfers and a dedicated UK coordinator — both procedures offered at fixed, all-inclusive Turkey prices.
- ✓ Turkish Ministry of Health International Health Tourism Authorization (Cert. ST-6335)
- ✓ Written guarantee (lifetime on implants; 5–10 years on crowns/veneers)
- ✓ European Medical Awards 2025
- ✓ Straumann & Nobel Biocare implant systems
Holds the official International Health Tourism Authorization from the Republic of Turkey Ministry of Health (Certificate ST-6335, 18 Sept 2025) — see the verified certificate.
Request a clinical assessment →Typical UK saving
65%
vs UK private full-arch
Taki Dent is our disclosed clinical partner — see the credentials we verified, including its Turkish Ministry of Health International Health Tourism Authorization, on Why Taki Dent →
Frequently asked questions
Is All-on-6 better than All-on-4?
Not automatically. All-on-6 adds two implants and can distribute bite force across more fixtures, which is sometimes discussed for dense bone, heavier bites and longer bridges. All-on-4 needs less bone, is generally lower cost, and suits a wide range of patients. Which one fits a given case depends on bone volume, distribution, bite forces and prosthetic design — confirmed by a CT/CBCT scan and clinical examination, not by implant count alone. See the full comparison table and who needs which.
How much more does All-on-6 typically cost than All-on-4?
In Turkey, All-on-6 is typically priced somewhat higher than All-on-4 per arch, reflecting two extra implants, abutments and additional surgical time; the UK private-sector gap is usually larger in absolute terms. Exact figures vary by clinic and case — see the sourced cost comparison, UK cost and Turkey cost pages for current ranges.
Which lasts longer, All-on-4 or All-on-6?
Neither is established as meaningfully longer-lasting in isolation. Longevity depends more on bone quality, bite forces, hygiene, prosthetic design and clinician skill than on implant count. Some clinicians consider six implants to offer a mechanical margin in heavier-bite cases, but this is case-dependent, not guaranteed. See longevity & success rates for the sourced detail.
Do I have enough bone for All-on-6?
All-on-6 generally needs more posterior bone height than All-on-4, because its rear implants are typically placed upright rather than angled. Whether your bone supports it can only be confirmed on a CBCT scan; if posterior bone is limited, a clinician may discuss All-on-4, grafting, or both as options. See bone loss & grafting.
What if I do not have enough bone for either option?
Reduced bone volume does not automatically rule out a fixed full-arch solution. Depending on the anatomy, a clinician may discuss grafting, a sinus lift, alternative implant angulation, or in some cases a different implant protocol. This is assessed individually on imaging — see bone loss & grafting for how these options are typically weighed.
Is recovery different between All-on-4 and All-on-6?
Recovery is broadly similar for both — initial swelling and a soft-food period are typical. All-on-6 surgery generally takes somewhat longer per arch because there are two more implant sites, which some patients associate with marginally more post-operative swelling, though this varies by individual. See recovery for a fuller picture.
What happens if one implant fails?
Failure of any implant, in either system, can require reassessment of loading, the prosthesis and the treatment plan — it is not something either procedure is designed to fully absorb without review. Additional implants may add supporting points, but this should not be treated as a guaranteed safety net. See failure & complications for a fuller, nuanced explanation.
Can I get same-day (immediate loading) teeth with either option?
Immediate provisional teeth may be possible with All-on-4 or All-on-6 when adequate primary stability and other clinical criteria are met at surgery — it is assessed at the time, not guaranteed in advance for either system. See procedure differences.
Is All-on-6 the safer choice if I grind my teeth (bruxism)?
Distributing bite force across more implants is one factor some clinicians weigh for confirmed bruxism, alongside a night guard and prosthetic material choice — it is a consideration, not an automatic recommendation. The right plan depends on the individual case. See who needs which.
Does the upper jaw need a different approach to the lower jaw?
Yes — planning differs by arch. The upper jaw involves assessing bone volume relative to the sinuses; the lower jaw involves assessing bone density relative to the nerve canal. Implant number and placement are planned separately for each arch, not assumed to match. See upper jaw and lower jaw.
Will a clinic just recommend the more expensive option?
A trustworthy clinic bases its recommendation on a CT/CBCT scan and explains its reasoning, not on price alone. Be cautious of any clinic that recommends All-on-6 without showing supporting imaging, and equally cautious of one that pushes the cheapest option regardless of anatomy. See who needs which for the factors a clinician typically weighs.
What does the published research actually show about success rates?
Published follow-up data on both configurations generally reports high implant survival in well-selected, well-planned cases — but survival, success and prosthesis longevity are distinct measures, and reported figures vary by study, follow-up length and definition. See research & evidence for sourced detail rather than a single headline number.
Where does treatment happen if I use your disclosed clinical partner?
This site's disclosed clinical partner is Taki Dent in Antalya, Turkey, ranked #1 of 124 clinics by Top Dental Clinics Turkey in a complaint-first assessment (composite 93.3/100) — a cited third-party ranking, not this site's own score. Clinical assessment and treatment take place at the clinic, under its Specialist Prosthodontist. This is a disclosed commercial relationship — see our advertising disclosure and how to request a clinical assessment.