All-on-4® vs. All-on-6®: Which Full-Arch Solution is Best?

If you're missing a full arch of teeth, you've likely heard of All-on-4® and All-on-6® implants. Both offer a life-changing, permanent alternative to traditional dentures, but what's the real difference? This guide breaks it down.

The Fundamental Difference: Implant Count

The names say it all. The core difference is the number of implants surgically placed into the jaw to support a full bridge of prosthetic teeth.

• All-on-4®: Uses four implants. The two posterior (back) implants are typically placed at an angle to maximize contact with available jawbone, often avoiding the need for bone grafting.
• All-on-6®: Uses six implants. The two additional implants are usually placed in the back of the jaw, providing a wider support base.

All-on-4®: The Efficient Standard

The All-on-4® concept is the most well-known and widely performed full-arch solution. Its popularity comes from its efficiency and ability to work for patients who have experienced some jawbone loss.

Pros:

• Less Invasive: Fewer implants mean a potentially shorter and simpler surgery.
• Avoids Bone Grafting: The angled posterior implants make it a viable option for many patients without needing a separate bone graft procedure.
• Slightly Lower Cost: Fewer implants and a simpler surgery generally make it a more affordable option than All-on-6.

Cons:

• Less Distribution of Force: Chewing pressure is distributed across four points, which can be a concern for patients with a very strong bite or bruxism (teeth grinding).

All-on-6®: The Stability Champion

All-on-6® is an evolution of the same concept, designed to provide an even more robust and stable foundation.

Pros:

• Enhanced Stability: The six implants distribute chewing forces more evenly across the jaw, reducing stress on each individual implant. This is highly beneficial for long-term durability.
• Greater Security: The additional support provides extra peace of mind and is often recommended for patients with a heavier bite or lower bone density.
• Better for Jawbone Health: More implants can help stimulate the jawbone more effectively, potentially leading to better long-term bone preservation.

Cons:

• Higher Cost: Two extra implants and a slightly more complex procedure mean a higher price point.
• May Require More Bone: While still a streamlined procedure, it's more likely to require adequate bone density across a wider area of the jaw compared to All-on-4.

Which One Should You Choose?

The decision is a clinical one that should be made with your dentist. Here’s a general guide:

• Choose All-on-4® if: You have moderate bone loss and want the most efficient, cost-effective, and proven full-arch solution.
• Choose All-on-6® if: You have lower bone density, a history of teeth grinding, or simply want the maximum possible stability and peace of mind for your investment.