All on Four vs All on Six Dental Implants

All-on-4 and All-on-6 are two protocols for replacing a full arch of teeth with fixed implants. The core difference is the number of implants used to support the bridge: four for All-on-4, six for All-on-6. Both restore full-mouth chewing function in a single day. The right choice depends on your bone volume, bite forces, and long-term goals, not on a universal answer.

Quick Comparison

• All-on-4: 4 implants, angled placement, immediate loading, lower cost, works with less bone
• All-on-6: 6 implants, more distributed load, greater long-term margin, better for strong bite forces

When All-on-4 Is the Right Choice

All-on-4 was specifically developed to work in patients with limited bone volume, which is common after years of tooth loss or denture wear. The two back implants are placed at an angle to engage denser bone at the front of the jaw, avoiding sinus lifts and major grafting. All-on-4 typically works well for:

• Patients with moderate bone loss
• Patients who want the most affordable full-arch fixed option
• Patients who cannot commit to a longer treatment timeline that grafting would add
• Smaller-framed patients with lower bite forces

When All-on-6 Is the Right Choice

All-on-6 distributes chewing forces across six implants rather than four, giving each implant less to handle. This is a meaningful advantage in patients with strong bite forces or a history of clenching or grinding. All-on-6 typically works well for:

• Patients with good bone volume (or willingness to graft)
• Patients who grind their teeth or have strong bite forces
• Patients wanting the maximum long-term margin of safety
• Cases where the final bridge will be zirconia (heavier and less forgiving of implant loss)

What They Have in Common

Both protocols use immediate loading, meaning you leave surgery with a fixed temporary bridge the same day. Both require 3 to 4 months of integration before the final bridge is placed. Both are minimally invasive compared to placing 10 to 14 individual implants. Both restore about 90% of natural chewing function.

Cost Difference

All-on-4 typically runs $22,000 to $32,000 per arch for an acrylic-on-titanium hybrid. All-on-6 runs $2,000 to $6,000 more for the additional two implants and slightly larger bridge. Both scale up to $35,000 to $55,000 if the final bridge is zirconia. See our full mouth dental implants cost page for a complete breakdown.

How We Choose in Your Case

Every case starts with a CBCT scan and clinical exam. We measure bone volume and density, assess your bite forces, review your medical history, and factor in your budget. In most cases either protocol is viable, and we walk you through the tradeoffs before you decide.

Frequently Asked Questions

Is All-on-6 always better than All-on-4?

No. In patients with limited bone or moderate bite forces, All-on-4 performs equally well long-term at a lower cost and with less invasive surgery.

Can I upgrade from All-on-4 to All-on-6 later?

Technically yes, but it is uncommon. If All-on-4 is chosen well and cared for, it typically does not need upgrading.

Which lasts longer, All-on-4 or All-on-6?

Both have similar implant survival rates over 10 to 20 years when placed and maintained well. All-on-6 has a slightly better safety margin if an implant is lost.

Consult in DC, Alexandria, or Reston

Request a consult at our Washington DC, Alexandria, or Reston office. We will do a CBCT scan and recommend the protocol that fits your bone, bite, and budget.