Patent ID: 11896275
Assignee: BIEDERMANN TECHNOLOGIES GMBH & CO. KG
Field: Medical technology (Instruments)
Classification: CPC A  F  Y | IPC A

Claim 10:
11. A dynamic bone anchor comprising:
an anchor member having a first end, a second end, and an anchor axis extending through the first and second ends, the anchor member comprising a tubular body and a bone engagement structure on at least a portion of an outer surface of the anchor member configured to engage a bone, the tubular body comprising an inner surface defining a bore having an open first end corresponding to the first end of the anchor member and an opposite second end, wherein the anchor member is made at least partially of a first material that comprises a shape memory alloy having superelasticity;
a longitudinal core member having a first portion, a second portion, and an elongated shaft between the first and second portions, the second portion and the elongated shaft being insertable into the first end of the anchor member and moveable towards the second end of the anchor member, wherein the second portion defines a greatest outer width of any portion of the longitudinal core member that is insertable through the open first end of the bore;
wherein at a first position, the second portion of the core member is received in the bore with part of the second portion extending out of the second end of the bore, and the second portion is fixed axially to the anchor member by dircctly engaging a first portion of the inner surface adjacent to the second end of the bore, where a smallest diameter of the bore at the first portion of the inner surface is not less than a diameter of the open first end of the bore while the elongated shaft is spaced radially apart from the inner surface, and the core member does not have a surface at or adjacent to the second portion that faces the first portion of the core member against which any portion of the anchor member is configured to abut.