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¹ All authors: Department of Diagnostic Radiology SP2-123, Yale University School of Medicine, 333 Cedar St., P.O. Box 208042, New Haven, CT 06520-8042.

•  A Technique for Sinus Augmentation of the Resorbed Maxilla Prior to Implant Placement. A Clinical Report
  Camilla Hildebrand, Flora Miriallis
  Institute of Odontology, Karolinska Institutet
  Huddinge Sweden

    http://www.ki.se/odont/cariologi_endodonti/97B/CamillaHildebrand_FloraMiriallis.pdf

An inadequate bucco-lingual and apico-occlusal dimension of the crestal bone under the maxillary sinus, is a frequent anatomical restriction for the prosthetic rehabilitation of the posterior region of the upper jaw. The loss of teeth, together with a marginal and cortical resorption, produces a reduction in the alveolar bone height: as a matter of fact, after every extraction, the periosteum of the Schneider's membrane shows an increasing osteoclastic activity and, meantime, there's a resorption of alveolar bone following the loss of marginal bone. As a direct consequence of this process, the distance between the highest point of the ridge and the sinus floor decreases and is not suitable for the insertion of implants.(cont... )

Dr. Ferdinando Cosci