All-on-4 vs All-on-6 Dental Implants
Both All-on-4 and All-on-6 deliver full-arch tooth replacement using a fixed (non-removable) prosthesis supported by implants. The choice between them is primarily driven by bone availability, bite forces, jaw location, and surgeon judgment - not by patient preference or cost minimization alone.
At a Glance
| Dimension | All-on-4 Dental Implants | all-on-6 |
|---|---|---|
| Implants per arch | 4 | 6 |
| National median cost per arch | $28,000 | $32,000 |
| Surgical complexity | Moderate; uses angled posterior implants | Slightly higher; more implants placed |
| Bone requirements | Minimum bone in anterior region; angulation maximizes posterior bone use | Requires adequate bone for 6 implants; less commonly suitable for severe atrophy without grafting |
| Bite force distribution | Distributed across 4 points | Distributed across 6 points (more even load) |
| Typical upper-jaw use | Used but sinus considerations limit | Often preferred for upper jaw where bone is softer |
| Typical lower-jaw use | Most common protocol for lower jaw | Used for heavy bite forces, bruxism |
| Surgery time | 2-4 hours per arch | 3-5 hours per arch |
| Long-term implant survival | 94-98% at 10 years | 95-98% at 10 years |
| Mexico medical tourism cost | $7,500-$14,500 per arch | $9,500-$16,500 per arch |
About this comparison
All-on-4 and All-on-6 are the two most common implant-supported full-arch protocols in the United States. All-on-4 uses four implants per jaw with the rear two angled for maximum bone engagement; All-on-6 uses six implants, distributing bite force across more support points. This comparison covers cost, candidacy, longevity, surgical complexity, and which protocol is appropriate for which patient.
Patients with limited bone volume in the posterior jaw (more common in long-term denture wearers), patients seeking a more affordable option, patients with normal bite forces and no significant bruxism, and patients where surgeon-recommended treatment planning specifically supports four implants. All-on-4 is the most-validated protocol with the longest published outcomes track record.
Patients with heavy bite forces or documented bruxism (teeth grinding), patients receiving upper-jaw restoration where bone is typically softer, patients with adequate bone volume to support the additional implants without grafting, and patients who want maximum redundancy in case of any single implant failure.
Cost comparison
All-on-6 typically costs $4,000-$7,000 more per arch than All-on-4 in the US ($24,000-$45,000 vs $20,000-$38,000). The additional cost reflects two more implants, longer surgical time, and more complex prosthesis design. Both arches roughly doubles cost; many clinics offer 5-15% dual-arch discounts.
Evidence comparison
All-on-4 has the longer evidence track record dating to the original Maló protocol publications in 2003. Published 10-year survival data shows 94-98% implant survival. All-on-6 has slightly less long-term data but shows similar or marginally better implant-level survival at 10 years. Prosthesis-level outcomes are comparable between protocols.
Frequently asked questions
Is All-on-6 better than All-on-4? +
Not universally. All-on-6 distributes bite force across more implants and is often preferred for the upper jaw, patients with heavy bite forces or bruxism, and cases with adequate bone for the additional implants. All-on-4 is the standard for cases with limited posterior bone or normal bite forces. Both achieve similar long-term success rates when applied to appropriate cases.
How much more does All-on-6 cost than All-on-4? +
All-on-6 typically costs $4,000-$7,000 more per arch in the United States ($24,000-$45,000 vs $20,000-$38,000 for All-on-4). The cost difference reflects two additional implants and longer surgical time.
Will All-on-6 last longer than All-on-4? +
Implant-level survival is similar between the two protocols at 10 years (94-98%). All-on-6 provides redundancy: if one of six implants fails, the prosthesis is typically still supported by the remaining five. With All-on-4, a single implant failure may require prosthesis modification or additional implant placement.
Can I upgrade from All-on-4 to All-on-6 later? +
Adding implants later is technically possible but requires removing the existing prosthesis, planning additional implant positions in the existing bone, and fabricating a new prosthesis. The cost is typically equal to or greater than starting with All-on-6. Most surgeons recommend choosing the right protocol initially based on clinical assessment.
Which is better for the upper jaw - All-on-4 or All-on-6? +
All-on-6 is often preferred for the upper jaw because upper-jaw bone is typically softer (lower density), the sinus floor limits posterior implant placement, and the additional implants distribute bite forces more evenly. All-on-4 is more commonly used in the lower jaw.
Are the prosthetic teeth different between All-on-4 and All-on-6? +
The final prosthetic bridge is similar in appearance and function between the two protocols. The main difference is the underlying implant support structure. Both protocols offer acrylic hybrid, porcelain-fused-to-metal, or full zirconia prosthesis options.
Is All-on-4 less invasive than All-on-6? +
Marginally. All-on-4 requires placement of two fewer implants, slightly less surgical time, and slightly less anesthesia. Both procedures are done under IV sedation or general anesthesia. Recovery experiences are typically similar.
Bottom line
Choose based on clinical assessment, not cost alone. For most patients with adequate bone and normal bite forces, All-on-4 is appropriate and well-validated. For upper-jaw cases, heavy bite forces, bruxism, or cases requiring maximum implant redundancy, All-on-6 is the preferred protocol. The right choice should come from a board-certified periodontist or oral surgeon after 3D CBCT imaging and treatment planning.
Sources
- Maló P, et al. All-on-4 retrospective study. Clinical Implant Dentistry and Related Research, 2003. (Foundational All-on-4 protocol)
- Soto-Penaloza D, et al. The all-on-four treatment concept: Systematic review. Journal of Clinical and Experimental Dentistry, 2017. (All-on-4 long-term outcomes)
- Maló P, et al. All-on-4 longitudinal study. Clinical Implant Dentistry and Related Research, 2019. (All-on-4 10-18 year follow-up)