ASTM F543-23

Die Annotation des Normtextes ASTM F543-23 :

This specification provides requirements for materials, finish and marking, care and handling, and the acceptable dimensions and tolerances for metallic bone screws that are implanted into bone. There are a large variety of medical bone screws currently in use, the following type of screws are used: type HA - spherical undersurface of head, shallow, asymmetrical buttress thread, and deep screw head, type HB - spherical undersurface of head, deep, asymmetrical buttress thread, and shallow screw head, type HC - conical undersurface of head, symmetrical thread, and type HD - conical undersurface of head, symmetrical thread. The torsional strength, breaking angle, axial pullout strength, insertion torque, self-tapping force, and removal torque shall be tested to meet the requirements prescribed.


Keywords:
bone screw, dimensions, insertion, performance requirements, pullout, static, test methods, torsion,, ICS Number Code 11.040.40 (Implants for surgery, prothetics and orthotics)