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All-On 4 treatment is a permanent dental prosthesis that replaces an entire row of teeth at the top or bottom of the jaw. It consists of a bridge supported by a complete prosthetic arch which is attached to 4 implants surgically implanted in the patient’s jawbone. At the top, two implants are placed in the front part of the jawbone, and two others are implanted at the bottom at an angle to avoid the sinus cavities. In the mandible, the two posterior implants are placed at an angle to avoid the inferior alveolar canal. The prosthetic arch, consisting of resin false gums and ceramic or porcelain teeth, completes the system.