For patients in Beirut who have been told they lack sufficient bone for conventional implants, All-on-4 and All-on-6 are not a compromise — they are the solution that makes implants possible. These techniques were specifically developed for full arch rehabilitation in the presence of significant posterior bone loss.

The principle is anatomically sound. By placing implants in the anterior jaw — where bone density and volume are better preserved even after years of tooth loss — and angling them strategically to maximise contact with available bone, a complete fixed arch can be supported on just four or six implants.

The All-on-4 and All-on-6 Protocol in Beirut

Dr. Habib Zarifeh — Head of Oral Surgery at CMC Hospital Beirut (Johns Hopkins International affiliated) — plans every All-on-4 and All-on-6 case from a full 3D Dentascan. Bone volume, nerve anatomy, sinus position, and implant angulation are mapped before a single incision is made.

• Upper jaw (All-on-6): Six implants placed in the anterior maxilla, avoiding the sinus region. The anterior bone zone provides reliable anchorage for a complete upper arch bridge even in patients with significant posterior bone loss.
• Lower jaw (All-on-4): Four implants placed in the inter-foraminal zone of the anterior mandible — the most predictable implant site in the mouth, preserved even in advanced bone loss cases.
• Same-day temporary restoration: A fixed temporary prosthesis is delivered at or shortly after surgery. The patient never leaves without teeth.
• Final fixed bridge: After osseointegration, a definitive screw-retained zirconia or porcelain bridge is fitted and torqued permanently into place.

Is All-on-4 / All-on-6 Right for You?

These protocols are most appropriate for patients currently wearing a complete denture, patients with extensive posterior bone loss who cannot accommodate standard implants in the back of the jaw, and patients who want to convert from a removable prosthesis to a fixed solution in a single surgical episode.

Where bone volume is adequate, Dr. Zarifeh always evaluates whether a larger number of implants would deliver a superior long-term outcome. All-on-4 and All-on-6 are recommended when they represent the most appropriate clinical solution — not simply the fastest or least expensive route.