Method for manufacturing a tubular spacer, and spacer

摘要

The cylindrical body (1) is made of biocompatible material and has toothed ends (7,8). A regular array of identical diamond-shaped apertures (3,4) divide the wall of the cylinder into a number of spiral straps (5,6) of equal helix angle, crossing each other at an acute angle. Prior to use the initial cylinder (9) may be deformed into oval or triangular-section tapered shapes, using mandrels (12). Internal mandrels may spread the body and external mandrels may reduce its diameter.