All-on-4 vs All-on-6 vs All-on-8: Which Full-Arch Solution Is Right for You?

"Should I have four implants or six?" is the question most often asked in a full-arch consultation, and the least useful one to answer from a brochure. Implant count is a clinical variable, not a product tier. Four, six or eight implants are designs chosen from a CBCT scan — the quantity and quality of your bone, the position of your sinuses, and the force your bite generates. The wrong answer in either direction costs money and risks the prosthesis.

This guide explains what each design is, who each suits, what the differences cost in Egypt in 2026, and how a responsible surgeon reaches the decision.

What each design actually is

All-on-4 places four implants in one jaw: two straight in the front, two tilted in the back. The tilting is the trick — it avoids the maxillary sinuses in the upper jaw and the mental nerve in the lower, letting the surgeon use the dense bone at the front of the jaw in patients who have lost bone further back. The tilted implants act as longer levers, and a full fixed bridge is fitted the same day or the next.

All-on-6 adds two more implants, usually in the posterior regions. Load is distributed across more anchors, which matters for patients with heavy bites, clenching habits or good bone volume in the back. It is not automatically "better"; it is different, and it costs more.

All-on-8 goes further and is genuinely uncommon. Eight implants are reserved for wide jaws with abundant bone and high load demands — often younger patients rebuilding after trauma, or cases where implants have already been lost. In most full-arch tourism cases it adds cost without proven benefit.

Head-to-head: bone, bite, timeline and cost

Factor	All-on-4	All-on-6	All-on-8
Implants per arch	4 (two tilted)	6	8
Bone requirement	Lowest — designed for bone loss	Moderate — needs posterior bone	High — abundant bone required
Bite force distribution	Adequate for most patients	Superior for grinders and heavy bites	Maximum anchorage
Indicative price per arch, Egypt	from $2,000	roughly 10–20% higher	roughly 25–40% higher
Same-day loading	Standard	Standard when stability allows	Case-dependent
Typical candidate	Denture wearers, bone loss, sinus proximity	Good bone, heavy bite, clenchers	Wide jaws, trauma, high-load cases

Indicative 2026 Cairo figures. All-on-4 pricing is from Doktorly's current price list; All-on-6 and All-on-8 premiums vary by case. Your exact price is confirmed in a fixed written quote after the free consultation.

The cost difference is real but modest compared with the alternative: where bone is genuinely lacking, adding implants does not substitute for volume. In those cases the honest options are grafting or zygomatic implants — see bone grafting versus zygomatic implants.

How the decision is really made

A responsible surgeon works through a fixed sequence, and you should be able to hear each step explained back to you.

1. CBCT scan and bone mapping. Bone height and width in the posterior jaws decide whether straight posterior implants are possible at all.
2. Sinus and nerve position. In the upper jaw, tilted All-on-4 implants are precisely how surgeons avoid sinus grafting; in the lower jaw, they avoid the mental foramen.
3. Bite force assessment. Signs of bruxism — wear facets, masseter hypertrophy, a history of broken dentures — push the plan towards six implants and a reinforced prosthesis.
4. Prosthesis design. Cantilever length matters as much as implant count. A well-designed All-on-4 with a short cantilever outperforms a poorly designed All-on-6.
5. Hygiene access. More implants and bulky hybrid designs can trap plaque; a cleansable design protects the investment for decades.

Photogrammetry completes the chain: capturing the exact position of the multi-unit abutments in under a minute gives the laboratory micron-accurate data for a passively fitting prosthesis — the single biggest technical predictor of long-term success. See photogrammetry versus traditional impressions for the detail.

Recovery and timeline

Either design follows the same itinerary. Plan 5–10 days in Egypt for stage one: surgery, fixed temporary teeth within 24–48 hours, two to four days of mild discomfort managed with standard painkillers, and suture removal before you fly. Three to six months later the definitive prosthesis — acrylic with metal reinforcement, or milled zirconia — is fitted and the bite balanced. Where immediate loading is not appropriate, conventional staged healing is used; our same-day versus conventional implants guide explains the trade-off.

Risks and considerations

• Too few implants for the bite: overloading four implants with a heavy bruxist's bite raises the risk of screw loosening and bridge fracture.
• Too many implants for the bone: placing six or eight into thin bone without grafting risks early failure — quantity cannot rescue quality.
• Sinus complications: posterior upper implants must respect sinus anatomy; tilted designs exist precisely to avoid it.
• Cantilever design: an over-long cantilever concentrates force on the last implant; keep the prosthesis design conservative.
• Hygiene neglect: the most common long-term threat to any full-arch prosthesis — cleanable designs and regular reviews matter more than implant count.

Why patients choose Doktorly for full-arch treatment

• CBCT-based planning with a written implant count, positions and rationale before you travel.
• Original documented implants — Straumann, Megagen or Hiossen — with implant passports.
• Photogrammetry at partner clinics for micron-accurate full-arch records.
• Fixed written quote within 48 hours, covering surgery, temporary teeth and the final prosthesis.
• Reviews at week one, month one, month three and month twelve, plus coordination with your dentist at home.

Frequently asked questions

How do I choose between All-on-4 and All-on-6?

All-on-6 offers more support and is recommended for patients with stronger jawbone density or heavier bite force. All-on-4 is more affordable and ideal for patients with bone loss, because the tilted posterior implants bypass the sinus and the weakest bone. Your surgeon decides from your CBCT scan, not from a price list.

What is the cost of All-on-4 in Egypt?

All-on-4 in Egypt starts at $2,000 per arch, and full-mouth packages covering both arches typically range $4,000–$6,000 including the temporary prosthesis. All-on-6 sits roughly 10–20% higher per arch.

How long do All-on-4 implants last?

With proper care, All-on-4 implants last 15–25 years or more. The prosthesis itself may need replacement after 10–15 years.

Can I get All-on-4 in one trip to Egypt?

Yes. Same-day or next-day loading is standard: you receive temporary fixed teeth within 24–48 hours, and the final prosthesis is fitted 3–6 months later, on a short second trip or from Doktorly's digital files at your local dentist.

Is photogrammetry used for All-on-4 in Egypt?

Yes. Top clinics use PIC Dental, ICAM or Shining 3D photogrammetry for the most accurate full-arch digital impression, eliminating uncomfortable traditional impressions and improving the passive fit of the prosthesis.

Materials & implant systems we use

Every treatment is planned with original, CE/FDA-approved premium materials — the same implant systems and ceramics used in Switzerland, Germany and the United States. Always ask for the implant passport.

Straumann Swiss premium implants · lifetime warranty Megagen Korean premium · excellent value Hiossen US-engineered · reliable mid-range Ivoclar Authentic E.max® ceramics