The phrase "All-on-4," frequently spelled "All-on-Four," describes the support of "all" teeth by "four" dental implants. This prosthodontics procedure is used for patients who are edentulous (toothless), have severely damaged teeth, have decayed teeth, or have teeth that are compromised due to gum disease. It involves putting four implants in the front maxilla, where bone density is higher, to restore an edentulous or dentate maxilla and/or mandible with a fixed prosthesis. A fixed prosthesis with 10 to 14 teeth is supported by the all on four dental implants and is put in place right away, usually 24 hours after surgery.
The following characteristics of All-on-4, a therapy method that has developed over time and is not an innovation, are present:
• A full fixed bridge will be supported by four dental implants
• The use of angulated implants in the back to correct structural or bony inadequacies
• Instantaneous loading
A bridge or denture can be used to replace the entire upper and/or lower set of teeth using the All-on-4 treatment idea, which is a prosthodontic technique (i.e. replacement of missing teeth). The treatment is best suited for persons who have considerable tooth decay or loss, as well as those whose jawbone loss makes it impossible for them to receive traditionally orientated (vertical) dental implants. The challenge of reconstructing the jaw bone, which necessitates bone grafting, arises from the fact that tooth loss is frequently accompanied with loss of the jaw bone.
A thorough examination of the bone structure is necessary for the implementation to be successful. A cone beam computed tomography (CBCT) scan is the best method for evaluating the bone. According to the All-on-4 protocol, a jaw must get at least four implants. The back implants are commonly oriented away from the occlusion between 30 and 45 degrees (biting plane). The implant is positioned in front of the mental nerve in the lower jaw and the maxillary sinus in the upper jaw (mandible). Around the second premolar position, the implant's head emerges. This will enable a molar tooth to be cantilevered posteriorly, leading to an approximate twelve-tooth denture or bridge.
By positioning the two posterior implants at an angle to avoid the sinus canals in the upper jaw and the nerve canal in the lower jaw, the All-on-4 approach makes use of the dense bone that still exists in the front section of the jaws.