In addition, when a maxillary molar or premolar is lost, the maxillary sinus pneumatizes in this region which further diminishes the thickness of the underlying bone. Overall, this leads to a loss in volume of bone that is available for implantation of dental implants, which rely on osseointegration (bone integration), to replace missing teeth. The goal of the sinus lift is to graft extra bone into the maxillary sinus, so more bone is available to support a dental implant.
In addition, when a maxillary molar or premolar is lost, the maxillary sinus becomes pneumatized in this area, which further reduces the thickness of the underlying bone. In total, this results in a decrease in the volume of bone suitable for dental implantation, which depends on osseointegration (bone integration). The objective of the sinus lift is to graft additional bone into the maxillary sinus so that more bone can support a dental implant.