[The use of a resorbable, synthetic membrane for the elevation of the sinus floor]. 
The elevation of the sinus floor is a routine procedure in pre-implantological surgery.  We report about our experience utilizing a resorbable, synthetic membrane (Ethisorb-Patch) for stabilization of the new generated floor of the sinus and for covering minor perforations of the sinus mucosa.  Due to the easy handling and the good clinical results the use of the Ethisorb-Patch during sinus floor augmentation can be recommended.