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If you are researching full-arch dental implants in India, you have almost certainly encountered both All-on-4 and All-on-6 as options. Most clinics present them as though one is simply ‘better’ than the other. The reality is more nuanced — and the right choice depends entirely on your bone anatomy, biting forces, and clinical situation.
This article explains the genuine clinical differences between All-on-4 and All-on-6, when each protocol is appropriate, what the procedure involves, and what you should ask any clinic before committing to either treatment.
What Are Full-Arch Implants?
Both All-on-4 and All-on-6 are fixed full-arch implant protocols — meaning a complete set of teeth (typically 10–12 per arch) is supported by a small number of implants and permanently fixed in the mouth. Unlike dentures, the prosthesis does not come out. Unlike individual implants for every missing tooth, the load is distributed across fewer, strategically placed fixtures.
The result is a complete functional and aesthetic restoration of an entire upper or lower jaw — or both — in a single surgical procedure, with a temporary fixed prosthesis often loaded the same day.
Learn more about all full-arch options at our full mouth implants page.
All-on-4: The Clinical Logic
All-on-4 was developed by Nobel Biocare and introduced the concept of angling the two posterior implants at 30–45 degrees. This angling achieves two things:
First, it maximises the surface area of bone contact for the posterior fixtures, improving primary stability without requiring more implants. Second, and more significantly, it allows the posterior implants to be placed anterior to the maxillary sinus (in the upper jaw) and anterior to the inferior alveolar nerve (in the lower jaw) — the two anatomical structures that most frequently limit posterior implant placement in patients with bone loss.
The practical consequence is that All-on-4 is often viable in patients with moderate bone resorption without bone grafting, significantly simplifying the treatment pathway and reducing the overall timeline.
A fixed temporary prosthesis is loaded the same day as surgery for suitable candidates, giving patients functional teeth immediately after the procedure.
All-on-6: When More Implants Are the Right Answer
All-on-6 uses six implants — typically four axial fixtures and two angled posteriors — to support the same full-arch prosthesis. The additional two implants serve three clinical purposes:
Greater primary stability. Six points of bone contact distribute the initial load more broadly, which is clinically advantageous in patients with denser bone or heavier biting forces. The risk of any single implant carrying disproportionate load during the osseointegration period is reduced.
Redundancy. In the unlikely event that one implant does not fully integrate, a six-implant arch has considerably more tolerance than a four-implant arch before the prosthesis is at risk.
Prosthetic span reduction. Six implants can support a slightly wider prosthesis with less cantilever extension, which is relevant for patients with broader dental arches or higher aesthetic demands for the posterior region.
Key Clinical Differences at a Glance
- Number of implants: All-on-4 uses 4; All-on-6 uses 6
- Bone grafting: All-on-4 typically avoids it; All-on-6 may require some supplementation in deficient areas
- Primary stability: All-on-6 generally higher, particularly in dense bone
- Suitable for: All-on-4 — patients with moderate bone loss, single-stage preference; All-on-6 — patients with good bone volume, high biting forces, or preferring maximum robustness
- Cost: All-on-6 is higher due to additional fixtures and components
- Same-day loading: Both protocols support same-day temporary loading in suitable candidates
Which Is Right for You?
The honest answer is that neither protocol is universally superior. The appropriate choice is determined by your CBCT scan findings — specifically your bone volume and density at the planned implant sites — combined with your biting pattern, arch width, and overall clinical picture.
Patients with moderate bone loss in the posterior upper jaw are frequently ideal All-on-4 candidates precisely because the angled posterior implants bypass the resorbed bone. Patients with well-preserved bone and strong biting forces — particularly those who have been clenching or grinding — may benefit from the additional primary stability of All-on-6.
A recommendation made without a CBCT scan is not a clinical recommendation. It is a commercial one.
The Procedure: What to Expect
Both All-on-4 and All-on-6 follow the same broad surgical protocol. On the day of surgery, the implants are placed under local anaesthesia (with sedation available for anxious patients). All remaining teeth in the arch are extracted if necessary at the same appointment. Implant positions are verified using ClaroNav Navident computer-guided navigation, ensuring each fixture is placed at the precise planned angle, depth, and position.
Once primary stability is confirmed, a fixed temporary prosthesis — fabricated in advance based on your digital planning — is attached. You leave the clinic with fixed teeth.
The temporary prosthesis is worn for 4–6 months while osseointegration completes. Your final prosthesis — fabricated by our in-house laboratory with over 50 specialist dental technicians, using full-contour zirconia or hybrid ceramic — is then placed at a subsequent appointment.
Read more about the immediate vs delayed loading decision and how it applies to full-arch cases.
Cost of All-on-4 and All-on-6 in India (2026)
Full-arch implant treatment in India represents a significant cost saving compared to equivalent treatment in the UK, US, or Australia — even at premium implant centres using internationally recognised systems.
- All-on-4 per arch (Nobel Biocare) — ₹3,50,000 to ₹5,00,000
- All-on-6 per arch (Straumann) — ₹5,00,000 to ₹7,00,000
These figures include implant fixtures, abutments, and both the temporary and final prosthesis. CBCT scan, extractions (if required), and anaesthesia are itemised separately at consultation.
Equivalent All-on-4 treatment in the UK runs £12,000–£18,000 per arch. In the US, $20,000–$30,000 per arch. The cost differential, even accounting for travel and accommodation, is substantial for patients flying from abroad.
Questions to Ask Any Clinic Before Committing
- Which implant system will be used, and can you show me the published clinical data?
- Is the recommendation based on a CBCT scan of my specific bone anatomy?
- Will the surgery be guided (ClaroNav or equivalent navigation) or freehand?
- Where is the final prosthesis fabricated, and what material will be used?
- What happens if one implant does not integrate?
For a full overview of what the assessment and treatment process involves, visit our full mouth implants treatment page or read our complete guide to dental implants in India.
