All-on-4 Implant Treatment
The All-on-4 Approach
All-on-4 is a protocol that aims to plan a fixed full-arch prosthesis on four implants in a fully or nearly fully edentulous jaw. The front implants are usually placed straight, while the posterior implants may be angled according to the existing bone anatomy; the aim is to obtain the best support from available bone. The protocol name refers to four implants; when bone is insufficient, grafting or sinus lifting may be planned as a separate stage.
In some cases, a temporary fixed prosthesis on the same day may be assessed; this is not valid for every patient and selection depends on clinical suitability. The final prosthesis is produced after osseointegration and healing.
Who Is It Considered For?
Bone volume, sinus position, systemic health and expectations are examined for suitability. CBCT shows bone distribution and anatomical risks. Extraction of existing decayed or mobile teeth may be part of the plan. Smoking and uncontrolled diabetes may increase the risk of complications. All-on-4 is not the only option for every full-jaw tooth loss; removable dentures, bar systems or All-on-6 may be discussed as alternatives. In the presence of bruxism, prosthetic material and occlusion design are assessed separately. In full-arch rehabilitation, bone volume and sinus position form the basis of the plan.
Surgery and Prosthetic Process
Same-day temporary restoration can be assessed only in selected and suitable cases; surgical and prosthetic timing is planned case by case. Soft-diet recommendations are shared during the healing period. The final prosthetic material and tooth arrangement are determined during try-in stages with patient approval. Occlusion and aesthetics can be tested with a mock-up. During the temporary prosthesis period, avoiding excessive load on the implants is recommended. In a screw-retained fixed prosthesis design, a removable structure may be preferred for hygiene; care instructions are given after the procedure.
Care and Limitations
Hygiene under the prosthesis and regular controls are important. Early intervention may be needed in situations such as implant or screw loosening and prosthesis fracture. The protocol differs from a traditional denture in cost and surgical scope; expectations are discussed realistically during examination.
The number of All-on-4 implants does not create a superiority guarantee; success depends on bone quality, hygiene and systemic factors. In case of implant loss, revision or an alternative prosthetic plan is assessed. Regular control and professional cleaning may support prosthesis longevity. Imaging frequency is determined according to clinical need.