Quick answer
All-on-4 generally uses four implants to support a full-arch prosthesis; All-on-6 generally uses six. The number alone does not determine which option is appropriate. Your bone quality, anatomy, bite forces, prosthetic design and overall health all matter.
What do “All-on-4” and “All-on-6” mean?
These terms describe full-arch tooth replacement approaches where a fixed or removable prosthesis is supported by a smaller number of implants rather than one implant for every missing tooth. “All-on-4” commonly refers to four implants supporting one arch. “All-on-6” commonly refers to six. Exact systems, angles, component designs and prosthetic materials vary between clinics and manufacturers.
Why might a dentist recommend four implants instead of six?
Four implants may be selected when the clinical plan can achieve suitable support and implant positioning with the available bone. In some cases angled posterior implants can be used to avoid anatomical structures or reduce the need for grafting. This is a clinical decision, not something that should be chosen from a price list alone.
Why might six implants be considered?
A dentist may consider additional implants to change load distribution or prosthetic support, provided the anatomy and bone allow it. Six implants do not automatically mean a better outcome. More implants also means more surgical sites and potentially a different cost and maintenance profile.
Questions to ask before comparing quotes
When comparing All-on-4 and All-on-6 quotes, ask which implant brand and model is proposed, what temporary and final teeth are included, what material the final bridge uses, whether extractions or bone procedures are included, what happens if an implant does not integrate, and how the final prosthesis will be maintained.
If price is one of your main questions, see our guide to All-on-4 costs in Vietnam and what should be included in a full-arch quote.
The key point for Australians travelling to Vietnam
Do not choose between All-on-4 and All-on-6 before the treating dentist has reviewed the required imaging and completed a clinical assessment. An overseas estimate can help with planning, but the final plan should be confirmed after examination and imaging in the clinic.
Australian information worth reading
Overseas dental treatment involves additional considerations. Before deciding, review independent Australian guidance and discuss your individual health and dental needs with an appropriately qualified dental professional.