All-on-4 vs All-on-6: Which Full-Arch Implant Option Is Right for You?
Author: ID Wellness Dental Editorial Team | Published: 2026-08-11
All-on-4 and All-on-6 both replace a full arch of teeth with a fixed bridge. This guide explains how the implant number changes support, why one approach is not universally better, and what a 3D evaluation can reveal.
Quick Answer: All-on-4 uses four implants to support a full arch of fixed teeth, while All-on-6 uses six. Neither is automatically better. The appropriate option depends on your bone anatomy, bite forces, remaining teeth, medical history and treatment goals. At ID Wellness Dental, a 3D CBCT evaluation helps determine the safest and most predictable full-arch plan. What Do All-on-4 and All-on-6 Have in Common? Both are forms of full-arch implant treatment, often called All-on-X. They are designed for people who are missing most or all teeth, have failing teeth, or struggle with removable dentures. A fixed bridge is attached to implants placed in the upper or lower jaw, creating teeth that do not come out at home. The Core Difference: Four Implants vs. Six All-on-4 supports a bridge with four strategically positioned implants. All-on-6 uses six implants, which can provide additional points of support when the anatomy and treatment plan call for it. Implant number is only one part of the decision. Position, bone quality, bite design and the final bridge material all affect the plan. Consideration All-on-4 All-on-6 Implants per arch Four Six Typical goal Fixed full-arch support with a streamlined implant plan Fixed full-arch support with additional implant support when indicated Is it better for everyone? No—selection depends on your evaluation No—selection depends on your evaluation How is the choice made? With a clinical exam, 3D CBCT imaging, bite evaluation and discussion of
Frequently Asked Questions
Is All-on-6 better than All-on-4?
Neither is universally better. All-on-6 uses two additional implants, but the appropriate plan depends on your anatomy, bone support, bite and treatment goals.
Can All-on-4 avoid bone grafting?
In some appropriately selected cases, implant positioning can reduce the need for grafting. A 3D CBCT evaluation is needed to determine what is appropriate for you.
How long do full-arch implants last?
With good home care and professional maintenance, implants can last many years. The prosthetic bridge may need maintenance, repair or replacement over time.