US 12,661,429 B2 · Non-fixed type implant for craniotomy and method of manufacturing same

Abstract

Proposed is a non-fixing implant made of a raw material including a biomaterial and a ceramic-based composite material having excellent osteoconductivity in addition to a polymer. The non-fixing implant can be accurately secured to a gap between the skull and the bone flap and can be conveniently used. Further proposed is a method of manufacturing the non-fixing implant. The non-fixing implant includes a flexible wedge deformable to conform to the external contour of the bone flap and a plurality of wings connected to an upper or lower portion of the flexible wedge and extending to both sides of the flexible wedge. The wings have a porous structure. The wings on one side will be positioned on the bone flap and the wings on the other side will positioned on the skull. The non-fixing implant has the advantage of being capable of accurately filling a defect formed by craniotomy, has improved biocompatibility and bone bonding ability, and allows tissue invasion.

Claims15

Dependent claims

A non-fixing implant for filling a gap between a skull (1) and a bone flap (2) created by craniotomy, the implant comprising:

a flexible wedge (100) deformable to conform to an external contour of the bone flap (2);
and
a plurality of wings (200) connected to an upper or lower portion of the flexible wedge (100) and extending to both sides of the flexible wedge (100),
wherein the plurality of wings (200) has a porous structure, wherein first-side wings (201) of the plurality of wings (200) are to be disposed on the bone flap (2) and second-side wings (202) of the plurality of wings are to be disposed on the skull (1),
the flexible wedge (100) comprises a plurality of stacked lines disposed on or under the plurality of wings (200),
the plurality of stacked lines has a structure in which protrusions and depressions are alternately connected, including a first pattern line inclined to have an acute angle with a bottom surface and a second pattern line inclined to have an obtuse angle with the bottom surface.

3 more elements

A method of manufacturing a non-fixing implant (10) for filling a gap between a skull (1) and a bone flap (2) caused by craniotomy, the method comprising:

preparing a material by mixing a polymer and a calcium phosphate compound in a weight ratio in a range of from 10:0 to 5:5;
printing a plurality of wings (200) using an FDM 3D printer and the material;
and
forming a flexible wedge (100) by stacking a plurality of lines using the FDM 3D printer and the material on the plurality of wings (200),
wherein the plurality of wings (200) has a porous structure, wherein first-side wings (201) of the plurality of wings (200) are to be disposed on the bone flap (2) and second-side wings (202) of the plurality of wings are to be disposed on the skull (1),
the forming of the flexible wedge (100) is performed such that the flexible wedge (100) comprises a plurality of stacked lines disposed on or under the plurality of wings (200),
the plurality of stacked lines has a structure in which protrusions and depressions are alternately connected, including a first pattern line inclined to have an acute angle with a bottom surface and a second pattern line inclined to have an obtuse angle with the bottom surface.

4 more elements

Dependencies are inferred from the claim text.

Non-fixed type implant for craniotomy and method of manufacturing same

Life of this patent

Non-fixed type implant for craniotomy and method of manufacturing same

Life of this patent

Abstract

Claims15