Full-arch implant rehabilitation replaces an entire row of teeth with a fixed prosthesis supported by implants. The two most common protocols are All-on-4, which uses four implants per arch, and All-on-6, which uses six. This guide explains the clinical difference, who qualifies for each approach, what the procedure involves in Turkey, and how 2026 pricing compares to the UK and US.
What is the difference between All-on-4 and All-on-6 full-arch implants?
Both protocols support a full fixed bridge with fewer implants than traditional one-per-tooth reconstruction. The difference is the number of fixtures and the distribution of load. All-on-4 places two axial implants at the front and two tilted implants at the back to avoid the maxillary sinus in the upper jaw and the mental nerve in the lower jaw. All-on-6 adds two additional axial implants, usually in the premolar positions, to spread masticatory force across more bone.
The extra implants in All-on-6 can improve stability in patients with lower bone density or higher functional demands, but they also require more available bone and a longer surgical session. Neither protocol is universally superior; the choice follows radiographic assessment, bite force requirements, and the condition of the remaining jawbone.
- All-on-4: four implants per arch, often with posterior tilted fixtures to bypass anatomical limits
- All-on-6: six implants per arch, broader load distribution, generally requires more bone volume
- Both protocols deliver a fixed acrylic-composite or zirconia bridge, not individual crowns
- Tilted posterior implants in All-on-4 are a recognised biomechanical design, not a workaround
Who is a candidate for full-arch implant rehabilitation?
Candidates are typically patients who have lost most or all teeth in one or both arches, or whose remaining teeth are not restorable. The minimum requirement is sufficient jawbone to anchor the planned number of implants and enough vertical space for the prosthesis without overloading the bite.
Contraindications are similar to those for any implant surgery: uncontrolled diabetes, active periodontal disease, heavy smoking, recent bisphosphonate therapy, or radiation to the jaw. These factors do not automatically rule treatment out, but they shift the risk profile and may require pre-surgical preparation.
- Fully or mostly edentulous patients, or patients with terminal dentition
- Adequate anterior bone for axial implants; posterior tilted implants reduce grafting need
- Patients willing to accept a fixed provisional bridge during the healing phase
- Realistic expectations about maintenance, hygiene visits, and possible future repairs
How does the full-arch procedure work in Turkey?
A compliant pathway begins with CBCT imaging, intraoral scans, and a written treatment plan before travel. The surgical phase usually takes one to two days per arch. Any remaining failing teeth are removed, implants are placed, and a fixed provisional bridge is attached within 24 to 72 hours. This immediate-loading protocol is why the treatment is sometimes marketed as 'teeth in a day'.
The provisional bridge is not the final restoration. After three to six months of osseointegration, the patient returns for impressions and a definitive bridge, typically in zirconia or a titanium framework with acrylic or ceramic teeth. Some clinics compress this into a single extended stay; others require two separate trips. The treatment plan should state the number of visits and the interval between them.
How do All-on-4 and All-on-6 costs compare in Turkey, the UK, and the US?
The table below compares indicative 2026 prices for a single full-arch rehabilitation. Turkish prices at accredited clinics usually include extractions, implants, provisional bridge, and final bridge in the quoted figure. UK and US averages are more commonly itemised and may exclude diagnostics, provisional restorations, and follow-up.
| Protocol / Region | UK Average | US Average | Turkey Average |
|---|---|---|---|
| All-on-4 per arch | £10,000 – £18,000 | $20,000 – $35,000 | $3,500 – $6,500 |
| All-on-6 per arch | £12,000 – £22,000 | $25,000 – $45,000 | $4,500 – $8,000 |
| All-on-4 both arches | £20,000 – £34,000 | $40,000 – $65,000 | $6,500 – $12,000 |
| All-on-6 both arches | £24,000 – £42,000 | $50,000 – $85,000 | $8,500 – $15,000 |
What risks and limitations should patients understand?
Full-arch rehabilitation is major oral surgery. The most common complications are infection around the implants, fracture of the provisional bridge, loosening of bridge screws, and prosthetic wear over time. Long-term success depends heavily on oral hygiene, smoking status, and regular maintenance.
A second limitation is aftercare. Patients returning home need a local dentist willing to monitor the implants and adjust the bridge. The international care criterion in our index rewards clinics that provide transferable records, a written warranty, and a named contact for post-treatment review.
- Implant failure rates are higher in smokers and patients with uncontrolled systemic disease
- Provisional bridges are functional but not final; they may chip or stain before the definitive bridge
- Maintenance is lifelong: professional cleaning, screw checks, and eventual bridge replacement
- Home-country aftercare should be arranged before travel, not after complications arise
How should patients choose between All-on-4 and All-on-6?
The decision is clinical, not cosmetic. All-on-6 is generally preferred when bone volume is adequate and the patient has high masticatory demands — for example, a strong bite or a history of bruxism. All-on-4 is often selected when bone is limited posteriorly, when the patient wants to avoid grafting, or when cost and surgical time are deciding factors.
A reputable clinic will not sell a protocol; it will recommend one after CBCT analysis and prosthodontic planning. Be cautious of any provider that quotes a full-arch price without imaging, or that pressures you toward All-on-6 solely because it is more expensive.