4. All-On-4This method mainly provides complete edentulous teeth (with movable dentures or all teeth to be pulled out). It is designed by four specially designed implants to fix the dentures and distribute the strength evenly. It can be completed in one day without waiting for long-term treatment. The operation process is easy, the wound is less, and the recovery is fast. Traditionally, 6-8 implants are needed to support the entire row of dentures.