BONE SCREW AND METHOD FOR MANUFACTURE Russian patent published in 2017 - IPC A61B17/86 B23G1/02 

FIELD: medicine.

SUBSTANCE: orthopedic screw includes a barrel, a thread made at least on a portion of the said barrel, at least one groove and one or more facets cut in at least one groove. This thread has a leading edge, a trailing edge and depth. The groove is formed on a leading edge or trailing edge and is configured to increase the surface area of the respective leading or trailing edges. According to the second version, the orthopedic screw comprises a barrel, a thread made at least on a portion of the said barrel, and a helical groove and one or more facets cut in one helical groove. This thread has a leading edge, a trailing edge and depth. The groove is formed in the barrel between the at least one leading edge and trailing edge configured to increase the barrel surface area. According to the third version, the orthopedic screw includes a barrel, a plurality of the first thread turns, at least one groove and one or more facets cut in at least one groove. The first thread turns are made at least on a portion of the said barrel. The said first thread turns have a leading edge, a trailing edge and depth, wherein a barrel portion remains between the leading edge and the trailing edge of the adjacent first threads. The groove is formed in the barrel between the leading edge and the trailing edge of the adjacent first thread turns and is configured to increase the barrel surface area. According to the fourth version, the orthopedic screw comprises a barrel, a plurality of the first thread turns, made at least on a portion of the said barrel, the said first thread turns have a leading edge, a trailing edge and depth, wherein the adjacent turns are separated by the barrel, and a helical groove formed in the barrel portion between the adjacent thread turns and configured to increase the barrel surface area, and one or more facets cut in a helical groove.

EFFECT: reduced probability of twisting.

13 cl, 21 dwg