Spacer for the maxillary sinus

摘要

A spacer for the maxillary sinus comprises a hollow cylindrical shaft (1), on the two ends of which retaining discs (2;4) are arranged, the disc (4) intended for the maxillary sinus lumen being provided with eyelets (5) on its circumference, through which is guided a thread (6) which permits, on tightening, folding of this disc toward the middle. <IMAGE>