US-12616506-B2 - Material directing orthopedic anchor

US12616506B2US 12616506 B2US12616506 B2US 12616506B2US-12616506-B2

Abstract

An embodiment includes a sacroiliac joint bone anchor system comprising: a bone anchor including an outer surface and an inner surface; wherein (a)(i) the outer surface includes a proximal third, a middle third, and a distal third, (a)(ii) the middle third of the outer surface includes at least one aperture that couples the outer surface to the inner surface; (a)(iii) the proximal third of the outer surface includes proximal threads, and (a)(iv) the distal third of the outer surface includes distal threads; wherein (b)(i) the bone anchor is cannulated, (b)(ii) a channel is located on the inner surface, (b)(iii) the channel extends from a proximal third of the inner surface to a distal third of the inner surface, and (b)(iv) the channel provides at least one half a rotation about a long axis of the bone anchor.

Inventors

Josh Kaufmann
Landon Gilkey
Francois FOLLINI
Greg Calbert
Scott Bryant
Brian Bergeron
Kaywan Gamadia
Maahir Haque

Assignees

GENESYS SPINE

Dates

Publication Date: 20260505
Application Date: 20240124

Claims (19)

1 . A bone anchor system comprising: a bone anchor including an outer surface and an inner surface; wherein (a)(i) the outer surface includes a proximal third, a middle third, and a distal third, (a)(ii) the middle third of the outer surface includes at least one aperture that couples the outer surface to the inner surface; (a)(iii) the proximal third of the outer surface includes proximal threads, and (a)(iv) the distal third of the outer surface includes distal threads; wherein (b)(i) the bone anchor is cannulated, (b)(ii) first and second channels are located on the inner surface, (b)(iii) the first channel is included in a distal third of the inner surface and the second channel is included in a proximal third of the inner surface, and (b)(iv) each of the first and second channels rotates at least partially about a long axis of the bone anchor; wherein the bone anchor includes a proximal tip and a distal tip; wherein the distal third of the outer surface includes a distal aperture; wherein the distal aperture is between the proximal and distal tips of the bone anchor; wherein the distal aperture directly connects to the first channel; wherein an opening of the distal aperture extends at least 1 mm proximally away from the distal tip and towards the proximal tip; wherein the distal aperture is at least partially included in a sidewall of the bone anchor.
2 . The bone anchor system of claim 1 wherein a plane, orthogonal to the long axis of the bone anchor, intersects each of: (c)(i) the outer surface, and (c)(ii) at least one of the at least one aperture that couples the outer surface to the inner surface.
3 . The bone anchor system of claim 2 , wherein: the at least one aperture includes a first aperture and a second aperture; the first aperture includes a long axis parallel to the long axis of the bone anchor; the first aperture includes a short axis orthogonal to the long axis of the first aperture; the first aperture includes a length measured along the long axis of the first aperture and a width measured along the short axis of the first aperture; the length of the first aperture is greater than the width of the first aperture.
4 . The bone anchor system of claim 3 wherein the plane intersects the first and second apertures.
5 . The bone anchor system of claim 3 wherein: (b)(i) each of the first and second channels extends from the proximal third of the inner surface to the distal third of the inner surface, and (b)(ii) each of the first and second channels provides at least one half a rotation about the long axis of the bone anchor.
6 . The bone anchor system of claim 1 , wherein the bone anchor is a compression screw.
7 . The bone anchor system of claim 1 comprising a ridge on the inner surface, wherein: the ridge forms a wall of the first channel.
8 . The bone anchor system of claim 1 , wherein: the distal third of the outer surface includes an additional distal aperture; the additional distal aperture is between the proximal and distal tips of the bone anchor; the additional distal aperture directly connects to a third channel; the additional distal aperture is at least partially included in the sidewall of the bone anchor.
9 . The bone anchor system of claim 8 wherein: the proximal threads include a first thread pitch which comprises a distance between crests of two adjacent threads; the distal threads include a second thread pitch; the first thread pitch is less than the second thread pitch.
10 . The bone anchor system of claim 9 comprising a rod, wherein: the rod includes a long axis; the rod includes a short axis orthogonal to the long axis of the rod; the rod includes a length measured along the long axis of the rod and a width measured along the short axis of the rod; the bone anchor includes a central aperture defined by the inner surface of the bone anchor; the central aperture extends from the proximal tip of the bone anchor to the distal tip of the bone anchor; the central aperture includes a width measured along a short axis of the bone anchor, the short axis of the bone anchor being orthogonal to the long axis of the bone anchor; the width of the rod is less than the width of the central aperture; the width of the rod is at least 75% of the width of the central aperture.
11 . The bone anchor system of claim 9 wherein: the sidewall of the bone anchor includes a first thickness included in a proximal third of the bone anchor; the sidewall of the bone anchor includes a second thickness included in a distal third of the bone anchor; the first thickness and the second thickness are both measured orthogonal to the long axis of the bone anchor; the first thickness is greater than the second thickness; the first thickness is measured from the inner surface of the bone anchor to the outer surface of the bone anchor and does not extend across the at least one aperture.
12 . The bone anchor system of claim 11 wherein the sidewall of the bone anchor system tapers away from the long axis of the bone anchor as the sidewall extends proximally towards the proximal tip and away from the distal tip.
13 . A bone anchor system comprising: a cannulated bone anchor including outer and inner surfaces and proximal and distal tips; wherein (a)(i) the outer surface includes proximal, middle, and distal thirds, (a)(ii) the middle third of the outer surface includes at least one aperture that couples the outer surface to the inner surface; (a)(iii) the proximal third of the outer surface includes proximal threads and the distal third of the outer surface includes distal threads; wherein (b)(i) a first channel is included in a distal third of the inner surface and a second channel is included in a proximal third of the inner surface, and (b)(ii) each of the first and second channels rotates about a long axis of the bone anchor; wherein the distal third of the outer surface includes a distal aperture: (c)(i) between the proximal and distal tips of the bone anchor, (c)(ii) directly connected to the first channel, (c)(iii) having an opening extending at least 1 mm proximally away from the distal tip, and (c)(iv) at least partially included in a sidewall of the bone anchor.
14 . The bone anchor system of claim 13 , wherein: the distal third of the outer surface includes an additional distal aperture; the additional distal aperture is between the proximal and distal tips of the bone anchor; the additional distal aperture directly connects to a third channel included in the distal third of the inner surface; the additional distal aperture is at least partially included in the sidewall of the bone anchor.
15 . The bone anchor system of claim 14 wherein: the proximal threads include a first thread pitch which comprises a distance between crests of two adjacent threads; the distal threads include a second thread pitch; the first thread pitch is less than the second thread pitch.
16 . The bone anchor system of claim 15 comprising a rod, wherein: the rod includes a long axis; the rod includes a short axis orthogonal to the long axis of the rod; the rod includes a length measured along the long axis of the rod and a width measured along the short axis of the rod; the bone anchor includes a central aperture defined by the inner surface of the bone anchor; the central aperture extends from the proximal tip of the bone anchor to the distal tip of the bone anchor; the central aperture includes a width measured along a short axis of the bone anchor, the short axis of the bone anchor being orthogonal to the long axis of the bone anchor; the width of the rod is less than the width of the central aperture; the width of the rod is at least 75% of the width of the central aperture.
17 . The bone anchor system of claim 15 wherein: the sidewall of the bone anchor includes a first thickness included in a proximal third of the bone anchor; the sidewall of the bone anchor includes a second thickness included in a distal third of the bone anchor; the first thickness and the second thickness are both measured orthogonal to the long axis of the bone anchor; the first thickness is greater than the second thickness; the first thickness is measured from the inner surface of the bone anchor to the outer surface of the bone anchor and does not extend across the at least one aperture.
18 . The bone anchor system of claim 17 wherein the sidewall of the bone anchor system tapers away from the long axis of the bone anchor as the sidewall extends proximally towards the proximal tip and away from the distal tip.
19 . The bone anchor system of claim 18 , wherein the bone anchor is a compression screw.

Description

PRIORITY This application is a continuation of U.S. patent application Ser. No. 16/967,007, filed Aug. 3, 2020, which is a § 371 national stage of international application PCT/US2019/016183, filed Jan. 31, 2019, which claims priority to U.S. Provisional Patent Application No. 62/625,157 filed on Feb. 1, 2018 and entitled “Material Directing Orthopedic Anchor”. The content of each of the above applications is hereby incorporated by reference. TECHNICAL FIELD Embodiments of the invention are in the field of orthopedic implants. BACKGROUND The sacroiliac joint (SI joint) is a joint in the pelvis that connects the sacrum and the ilium. When ligaments of the joint become loose or otherwise dysfunctional the SI joint may fail to provide adequate shock absorption for the spine, which may be painful. SI joint fusion is a technique used to stabilize the SI joint and to alleviate pain caused by the dysfunctional joint. One surgical technique for fusion is to drive one or more compression screws across the joint to stabilize the joint. Afterwards bone graft is placed within the joint, which eventually leads to fusion of the joint and, ideally, less pain. BRIEF DESCRIPTION OF THE DRAWINGS Features and advantages of embodiments of the present invention will become apparent from the appended claims, the following detailed description of one or more example embodiments, and the corresponding figures. Where considered appropriate, reference labels have been repeated among the figures to indicate corresponding or analogous elements. FIGS. 1A, 1B, 1C provide differing views of an embodiment. FIGS. 2A, 2B, 2C provide differing views of an embodiment. FIG. 2D provides a view of a rod or wire to be used with bone anchor embodiments described herein. FIGS. 3A, 3B, 3C, 3D provide embodiments with varying thread configurations and/or tool fixation configurations. FIG. 4 includes a cross-sectional view of an embodiment. DETAILED DESCRIPTION Reference will now be made to the drawings wherein like structures may be provided with like suffix reference designations. In order to show the structures of various embodiments more clearly, the drawings included herein are diagrammatic representations of structures. Thus, the actual appearance of the fabricated structures, for example in a photo, may appear different while still incorporating the claimed structures of the illustrated embodiments. Moreover, the drawings may only show the structures useful to understand the illustrated embodiments. Additional structures known in the art may not have been included to maintain the clarity of the drawings. “An embodiment”, “various embodiments” and the like indicate embodiment(s) so described may include particular features, structures, or characteristics, but not every embodiment necessarily includes the particular features, structures, or characteristics. Some embodiments may have some, all, or none of the features described for other embodiments. “First”, “second”, “third” and the like describe a common object and indicate different instances of like objects are being referred to. Such adjectives do not imply objects so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner. “Connected” may indicate elements are in direct physical contact with each other and “coupled” may indicate elements co-operate or interact with each other, but they may or may not be in direct physical contact. Phrases such as “comprising at least one of A and B” include situations with A, B, or A and B. An embodiment provides an anchor. One example of an anchor is a screw. Other examples include nails and the like. An embodiment includes a screw with an inner geometry that directs bone particulate in a general direction. For example, the inner geometry may include flutes formed from cuts and/or channels. For example, FIGS. 1A, 1B, and 1C show varying views of an embodiment. FIG. 1A includes a side view, FIG. 1B includes a side view with the exterior shell (or conduit or housing) removed to better visualize the inner bone particulate conveyor flutes, and FIG. 1C includes a perspective view with the exterior shell removed to better visualize the inner bone particulate conveyor flutes An outer shell 101 (which may also be referred to as a conduit) may have various apertures or windows, two of which are shown at apertures 102, 103. These apertures allow bone fusion to occur between the pelvic bone and bone particulate located within a trough or channel of a flute, such as channel 104 (which is located between flute ridges 105, 106). Screw 100 includes a receptor 107 that mates with a driver head. In an embodiment screw 100 includes proximal threads 109 and distal threads 108. The threads 108, 109 may be separated from one another by a threadless region 110, but in other embodiments threads may run from the distal end region to the proximal end region. Screw 100 may include areas of taper based in part on, for example, the angl