Understanding Full-Arch Implant Solutions
All-On-4 is a trademarked technique developed by Nobel Biocare in which a full dental arch is supported by four implants — two placed vertically at the front and two angled at the rear to maximize contact with available bone. It gained widespread recognition as an approach that could restore a full arch without bone grafting in many patients.
The name has become so recognized that it is now used loosely to describe any four-implant full-arch solution, regardless of manufacturer or technique variation. When evaluating your options, it helps to understand what you are actually comparing.
The Alternatives Worth Understanding
- All-On-6: Six implants supporting the arch rather than four, distributing load more evenly. Often recommended for patients with higher bite forces or in cases where the clinician wants additional stability. Requires adequate bone volume at all six positions.
- Implant-supported overdentures: A removable prosthesis anchored to two or four implants, as opposed to a fixed full-arch bridge. Less expensive, easier to clean, but removable — which some patients find unacceptable and others find practical.
- Traditional implant-supported fixed bridge: Each tooth position or small group of positions supported by its own implant. More implants, higher cost, but the most biomechanically similar to natural dentition.
- Zygomatic implants: For patients with severe bone loss in the upper jaw who would otherwise require extensive bone grafting. The implants anchor into the cheekbone. A specialized technique offered by a smaller number of providers.
The Deciding Factors
The right solution depends on your available bone volume and density, your overall health, the expected functional demands on the restoration, and your priorities around cost, maintenance, and the permanence of the solution. These are not decisions that should be made based on advertising or brand recognition.
A provider who presents only one option — regardless of which option it is — without discussing the alternatives and the reasoning for their recommendation is not giving you a complete evaluation.
What a Qualified Evaluation Looks Like
A thorough evaluation includes a cone-beam CT scan to assess bone volume, a clinical examination, a review of your medical history, and a candid conversation about which approaches are viable for your anatomy and which are not. The conversation should end with a recommendation you understand, not a protocol you were slotted into.
