The main obstacle for insertion of the dental implants is the condition of the bone in the back of the jaw. If too much time has passed from the extraction, the maxillary sinus may have caused bone resorption.
The purpose of sinus lifting is to upgrade the hollow parts with artificial bone creating a base for the implant in the bone.
A small sinus lift is performed with the osteotomy technique. The mucus of the sinus from the bottom is lifted and a bone is implanted before the implant gets fixed.