The sinus lift is a type of bone grafting, its aim is to thicken the maxillary sinus.

Sometimes in the upper jaw, the loss of bone resulting from tooth loss is more significant. In this case, the insertion of an implant in the room of the upper-posterior molar teeth requires a sinus lift of the upper jaw's bone. The loss of bone can be a result of anatomical characteristics (broad maxillary sinus, teeth with roots that reach into it) besides of tooth loss.