All-on-4

All-on-4 replaces a whole arch using four implants rather than one per tooth. The two rear implants are placed at an angle, which lets them engage denser bone at the front of the jaw and avoids the sinus and nerve. A fixed bridge is then carried on those four points.

How it's done

1. 01

   Planning scan

   CBCT imaging plans the angle and length of each implant against the available bone.

2. 02

   Extractions if needed

   Any remaining unsalvageable teeth are removed at the same appointment.

3. 03

   Implant placement

   Four implants per arch, the rear pair angled. Usually done under local anaesthetic with sedation available.

4. 04

   Immediate bridge

   Where stability allows, a fixed provisional bridge goes on the same day.

5. 05

   Final bridge

   After three to four months of integration, the definitive bridge is fitted.

Who it suits

People who have lost most teeth in an arch, or whose remaining teeth are failing, and who want something fixed rather than a denture.

Where it falls short

Fewer implants means each one carries more load, so bone quality matters more than usual. If one fails the whole bridge is affected, which is why some cases are better served by six.

Recovery

Significant swelling and bruising for up to a week; this is real surgery. Soft diet for six to eight weeks.