The sinus lift procedure: an alternative to the maxillary subperiosteal implant.

@article{Vassos1992TheSL,
  title={The sinus lift procedure: an alternative to the maxillary subperiosteal implant.},
  author={David M Vassos and P K Petrik},
  journal={Practical periodontics and aesthetic dentistry : PPAD},
  year={1992},
  volume={4 9},
  pages={14-9}
}
Technical advances now allow implants to be placed when pneumatization of the sinus has left insufficient bone to engage an endosseus implant. Augmenting material, such as a mixture of resorbable hydroxylapatite and demineralized freeze-dried bone, is grafted into the sinus cavity. This creates a new alveolar ridge to support endosseous implants.