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Frequently Asked Questions

Physician FAQs

What are the chances of tearing the membrane?

Generally, membrane tears during a hydraulic sinus lift are highly unlikely due to the membrane’s physical attributes. These attributes were measured by Professor Watzek and his group in Vienna[1], who showed that the membrane separates from the sinus floor at a pressure of about 0.5 atmosphere, and tears at a pressure of more than twenty fold. A 5 cc syringe used for the procedure can reach an average of 3 atmospheres of pressure, which could easily cause a separation of the membrane, but perforating it would be extremely difficult. Moreover, since liquid is used in the procedure, Pascal’s law is applied, whereby in the confined space the liquid evenly distributes pressure on the membrane’s surface, generating no excess pressure on a single point.

[1] Pommer B1, Unger E, Sütö D, Hack N, Watzek G. Clin Oral Implants Res. 2009 Jun;20(6):633-7. doi: 10.1111/j.1600-0501.2008.01686.x. Epub 2009 Mar 4. Mechanical properties of the Schneiderian membrane in vitro.