The unique All-on-4 prosthetics technology was offered by Nobel, the world leader in implant materials.
The placement of a full fixed denture on the jaw with only 4 attachments significantly reduces the number of contraindications for surgery, increases the percentage of implant engraftment and reduces the cost of the procedure, which is very important, given the price of this method.
What is the All-on-4 system?
The method consists in placing a fixed prosthesis on a completely edentulous jaw, which will be attached to only 4 implants. The frontal implants are placed straight - parallel to the vertical axis of the tooth, and the side implants are placed at an angle of 30 to 45 degrees. This allows for an even distribution of chewing load throughout the jaw, and also eliminates the problem of low bone density and atrophy of the alveolar processes, which is often seen in patients who lost their teeth long ago.
Unlike a removable jaw, a 4 implant denture is fixed immobile, which is very convenient for the patient. It does not need to be removed at night or for hygiene procedures. All care procedures are performed as if they were natural teeth. At the same time, if necessary, the surgeon can easily remove the construction, as the teeth and gingival base of the denture are attached to the 4 implants with screws. This allows for repair and replacement of the denture without surgical intervention. However, it should be noted that such a need arises very rarely.
Advantages of the All-on-4 method
All-on-4 implantation has clear advantages over removable prosthetics as well as other implantation techniques.
If you compare All-on-4 with classic implantation, the former has the following advantages:
- Reducing the number of pins implanted directly proportionally reduces the severity of surgery, rehabilitation time, and the possibility of complications.
- Non-removable construction is installed immediately after surgery.
- There is no need for surgical preparation before implantation, such as a sinus elevator.
Indications and contraindications for dentures on 4 teeth
The indications for this type of prosthetics are much broader than for traditional implantation:
- Complete absence of teeth on one (or both) of the jaws;
- Possible atrophy of bone tissue with preservation of minimum acceptable values of bone width and height;
- The need for one-stage installation of implants and a fixed prosthesis.
The contraindications to implantation by this technique are standard for all surgical manipulations.
How is a removable denture placed on 4 implants?
The procedure is quite complicated and is performed in several stages, only one of which is surgical.
- The patient undergoes a complete examination, based on the results of which the doctors determine the presence or absence of contraindications to implantation.
- A special surgical template is made, which later allows the doctor to insert the pin into the jaw perfectly accurately.
- The All-on-4 implant surgery itself.
- Installation of a fixed acrylic construction, simulating a row of 10-12 teeth. This occurs on the day of surgery or 24 hours later. From that moment on, the patient can eat almost any food, because a moderate load on the implant promotes better engraftment of the structure.
- The installation of a permanent fixed construction, which is a bridge on implants - on 4 "iron teeth".