Mrugas, Robert;Radomskie Centrum Innowacji i Technologil sp. z o.o.
发明人:
申请号：
EP19170144.0
公开号：
EP3560448A1
申请日:
2019.04.18
申请国别(地区):
EP
年份:
2019
代理人:
摘要：
The subject of the invention is an interference screw comprising a screw body which includes a tip portion (1) having a front face (2), a main screw body with a screw thread on an external surface between a tip portion and an end portion (3) having a rear face (4). In addition, along the axis of the screw body is the internal passageway (5) and between protrusions (6) of the screw thread, in the thread roots (7), there are located through openings (8) that connect with the internal passageway. The solution is characterized in that it has- the internal passageway (5) is located between the front face (2) of the tip portion (1) and the rear face (4) of the end portion (3) and it changes its size and cross section shape along its length, wherein the internal passageway (5) has a circular cross section in the tip portion (1) of the screw and the internal passageway has a polygon cross section in the main part of the screw body,- in the main portion of the body, through openings (8) of the screw, provided within a wall of the main screw body, have a repetitive shape,- the thread provided on the external surface of the main portion of the screw is a blunt interference thread, which task is to tighten the implants to the bone without causing damage- roughness of the external surface of the screw is in the range from 25 to 35 µm, whereas the porosity of the outer surface of the screw is in the range from 0.01 mm to 2 mm- it is coated with biocompatible and bactericidal materials.
