Root pin for endodontic complex supply, has fibers with longer longitudinal rigidity and smaller longitudinal rigidity arranged in center of root pin and boundary region of root pin respectively

摘要

The pin (100) has a base body made of a fiber-reinforced plastic matrix (13) incorporated on two kinds of fibers (14, 15). The two kinds of fibers have different wetting behaviors and/or different mechanical characteristics, and are radially arranged at two-part short-fiber reinforcements. The fibers with longer longitudinal rigidity and smaller longitudinal rigidity are arranged in center of the pin and a boundary region (16) of the pin respectively. The fibers with smaller longitudinal rigidity follow a main demand direction of the pin.