What's the Difference Between All-on-4 and All-on-6?

When a quote offers both All-on-4 and All-on-6, the instinct is that six must be safer than four. It’s not that simple. Here’s the plain-English difference.

More implants isn't automatically better — it's better for certain cases. The right number is a clinical decision about your bone and bite, not a tier you upgrade to.

The actual difference

Both restore a full arch with a fixed bridge screwed onto implants. The only difference is the number of anchor points:

• All-on-4 — four implants. Works where bone is more limited; lower cost.
• All-on-6 — six implants. More load distribution; sometimes preferred for the lower jaw or heavy bites; needs more healthy bone; costs more.

How the choice is made

A CT-based assessment weighs your bone volume, which arch, your bite force and cost. A good clinic explains why it recommends a number for you — be cautious of both a flat “more is always safer” upsell and a bare-minimum plan that ignores your bone.

Full explainer: All-on-4 vs All-on-6 vs All-on-8.

Don’t forget the bridge material

The implant count is half the decision — the prosthesis material (acrylic vs full zirconia) matters just as much for strength, looks and cost. See zirconia vs E-max vs PFM.

Before you decide

Read the All-on-4 vs All-on-6 explainer and All-on-4 costs. The right solution is the one matched to your jaw, not the bigger number.