Discover the fixed prosthesis on All on 4 or All on 6 implants: definition, advantages, disadvantages, risks, and comparison with other solutions.
All on 4 Definition
The All on 4 or All on 6 system takes its name from its fixation system by 4 or 6 implants. Often called fixed prosthesis on dental implants, because the most reliable variant is clipped and not fixed. The term denture stabilized by dental implants is more appropriate. It is an option often used by dentists who are not qualified in complex implantology and therefore cannot place basal implants. The fixed prosthesis on implants is less expensive but it is also less comfortable and does not have the aesthetics of natural teeth.
Installation and operation of All on 4
The installation of an All on 4 (All on four) is carried out in 2 stages spaced from 3 to 6 months in time.
1st step: Placement of dental implants
Carried out in one day, the placement of 4 or 6 traditional dental implants (not suitable for basal implants) is done in the maxillary bone or mandible. Good bone volume is required to support the pressure exerted on the implants. These implants act as stabilizers but tend to damage bone tissue. They must be placed only in the frontal (central) area, where bone density is highest.
2nd step: Placement of the fixed prosthesis on implants
The placement of the fixed All on 4 or All on 6 prosthesis takes 4 days. After an impression or intraoral scan, the dental technician sends the data to the laboratory for the fabrication of the prosthesis. Once ready, it is fixed or clipped onto the dental implants.
FAQ: All on 4 / All on 6
What Are the Risks of All on 4 / All on 6?
The main risk of the All on 4 and All on 6 system lies in complications related to dental implants. Peri-implantitis (infection and implant rejection) is common with this system. This high risk is due to the inability to use basal implants and the low number of implants, which concentrates significant pressure on the bone tissue. Chewing forces, normally distributed across 14 teeth, are concentrated on just 4 implants, causing excessive pressure on the spongy bone. Other risks include recurring fixation issues (broken screws or clips needing replacement).
How Much Does a Fixed All on 4 Prosthesis Cost?
The fixed All on 4 or All on 6 prosthesis is the most affordable solution for restoring dentition. Its cost is between โฌ2500 and 5000โฌ. The price may vary depending on the quality of materials and the brand of dental implants.
Is All on 4 Covered by National healthcareย Insurance (NHS)?
No, the fixed All on 4 prosthesis is not covered by national insurance system, but some private insurance plans may partially cover it.
Is the basal system better than All on 4? (Nobel Biocare)
The “All on 4” system from Nobel Biocare is certainly less expensive (up to 50%) but it has many drawbacks compared to the Bax basal implantology system. The risk of rejection is greater for an All on 4 or on All on 6, and the longer treatment time (minimum 3 months). The basal implant allows him to obtain a better success rate over treatment of 5 to 7 days.
Comparison between the All on 4 system and the basal system
