Schneiderian Membrane Perforation on Posterior Maxillary Implant....Nooh N

The extraction of posterior teeth and subsequent pneumatization of the maxillary sinus compromises osseointegrated implant placement in the posterior maxilla and necessitates associated surgical procedures like sinus floor elevation (sinus lift) and maxillary ridge augmentation. Sinus lift and bone grafting is the procedure of choice when the crestal bone height (CBH) is less than the shortest available implant length and has been used, as a technique, with considerable success.1 Nevertheless, these surgical procedures are not only considered invasive to patients, but also increase the overall treatment time, especially for the commonly employed “2stage sinus lift technique”.2 Sinus floor elevation or sinus lift could be done through internal or external approach which involves elevation of the sinus lining and placement of bone graft or bone ABSTRACT