Sacroiliac joint fusion implants
AssigneeGlobus Medical, Inc.
InventorMatthew Kowalski
Life of this patent
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Abstract
Bone implants, assemblies, and methods thereof. The implants may include non-threaded triangular implants configured to promote fixation and fusion of the sacroiliac joint. The implants may have a triangular body configured to prevent or minimize rotational motion of the implant. The implants may include an inner core or an outer shell, which provides structural support for a lattice structure. The structural geometry may be generated through topology optimization software, such as finite element analysis, based on anatomical loading conditions for the implant.
Claims18
An implant comprising:
- a dowel extending along a central longitudinal axis having a distal tip configured to facilitate insertion into bone and a proximal end configured to be engaged by an instrument, the dowel having a triangular cross-section with three faces and three vertices configured to limit rotational motion about the central longitudinal axis,
- wherein the dowel includes a solid portion for providing structural integrity and a lattice portion for facilitating bone growth, wherein the solid portion includes an amorphous geometry optimized based on anatomical loading conditions for the implant,
- wherein the solid portion includes an inner core, and
- wherein the inner core includes an outer framework with three beams forming the three vertices of the dowel and an inner framework having the amorphous geometry.
An implant comprising:
- a structural core extending along a central longitudinal axis having a tapered nose configured to facilitate insertion into bone and a proximal end configured to be engaged by an instrument, the structural core having three fins extending outward from the central longitudinal axis;
- and
- three outer insert trays receivable within respective channels defined between adjacent fins of the three fins of the structural core, thereby forming a triangular outer shape for the implant,
- wherein each outer insert tray and the adjacent fins of the three fins that receive the insert tray are coplanar.
A method for stabilizing a sacroiliac joint, the method comprising:
- providing an implant having a triangular cross-section with three faces and three vertices, wherein the implant includes a solid portion for providing structural integrity and a lattice portion for facilitating bone growth, wherein a distal end of the implant includes a self-broaching tip with stepped cutting flutes in the form of concentric rings;
- accessing an ilium of a patient;
- and
- inserting the implant across the sacroiliac joint such that once the implant is fully seated, the implant prevents rotational motion of the implant.
Dependencies are inferred from the claim text.