Severe proximal humeral bone-loss implants
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- ENCORE MEDICAL L P (D B A DJO SURGICAL)
- Filing Date
- 2024-08-28
- Publication Date
- 2026-07-08
AI Technical Summary
Severe proximal humeral bone loss poses challenges in securing the humeral component of a prosthesis, leading to instability or loosening over time, and existing management techniques like bone grafting are technically demanding and may not provide satisfactory results.
A humeral implant design featuring a body with a first and second portion, a stem, and a plate, where the plate has a protrusion to cooperate with the bicipital groove and an indentation to aid in positioning the bicep, eliminating the need for bone graft material and enhancing stability.
The humeral implant effectively restores shoulder joint function even with severe bone loss, providing enhanced stability and eliminating the need for bone grafting, thereby improving surgical outcomes.
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Figure US2024044296_06032025_PF_FP_ABST
Abstract
Description
SEVERE PROXIMAL HUMERAL BONE-LOSS IMPLANTSCROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to, and benefit of, U.S. Provisional Patent Application No. 63 / 579,354 filed August 29, 2023, and U.S. Provisional Patent Application No. 63 / 556,023 filed February 21 , 2024, each of which is hereby incorporated by reference herein in its entirety.TECHNICAL FIELD
[0002] The present disclosure relates generally to orthopedics and, more specifically, a humeral implant.BACKGROUND
[0003] Severe proximal humeral bone loss can present numerous challenges in operative management of shoulder conditions. The loss of bone stock can make it difficult to secure the humeral component of a prosthesis, leading to instability or loosening of the implant over time. In reverse shoulder arthroplasty, the severity of bone loss can affect the surgeon’s ability to place the implant at the correct height and version, which is critical for the successful functioning of the prosthesis.
[0004] Traditionally, severe proximal humeral bone loss has been managed with techniques such as bone grafting using autograft or allograft material. However, these procedures are technically demanding, have their own associated complications, and may not always provide satisfactory results. Therefore, a need exists for a prosthesis capable of restoring a higher degree of regular function to a shoulder joint, even with severe proximal humeral bone loss. It would also be beneficial if this prosthesis could eliminate the necessity of incorporating bone graft material in instances of severe proximal humerus bone loss. Furthermore, it would be advantageous if this prosthesis could facilitate a joint repair, ensuring a high level of stability.SUMMARY
[0005] According to some implementations of the present disclosure, a humeral implant includes a body, a stem, and a plate. The body has a first portion and a second portion. The first portion of the body is configured to be positioned generally within a prepared humerus bone of an individual. The second portion of the body is configured to be positioned generally outside of the prepared humerus bone of the individual. A proximal end portion of the second portion of the body defines an opening that leads into a socket of the body. The stem is coupledto a distal end of the first portion of the body such that the stem is configured to be positioned inside of the prepared humerus bone of the individual. The plate is coupled to and extends from the proximal end portion of the second portion of the body. The plate further extends generally alongside the body and at least a portion of the stem such that the plate is spaced apart from the stem. The plate has a first side that generally faces the body and the stem and also has a second opposing side that generally faces away from the body and the stem. The first side of the plate has a protrusion configured to cooperate with a portion of a bicipital groove of the prepared humerus bone of the individual. The second opposing side of the plate has an indentation configured to aid in positioning a portion of a bicep of the individual.
[0006] In some implementations of the present disclosure, a humeral implant includes a body, a stem, and a plate. The body has a first portion and a second portion. A proximal end portion of the second portion of the body defines an opening that leads into a socket of the body. The stem is coupled to a distal end of the first portion of the body so that the stem extends away from the body. The plate is coupled to and extends from the proximal end portion of the second portion of the body. The plate extends generally alongside the body and also extends alongside at least a portion of the stem. The plate is spaced apart from the stem. The plate has a first side that generally faces the body and the stem. The plate also has a second opposing side that generally faces away from the body and the stem. The first side of the plate has a protrusion, and the second opposing side of the plate has an indentation.
[0007] The above summary is not intended to represent each implementation or every aspect of the present disclosure. Additional features and benefits of the present disclosure are apparent from the detailed description and figures set forth below.BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 A is an assembled front perspective view of a reverse humeral implant, according to some implementations of the present disclosure;
[0009] FIG. IB is an assembled rear perspective view of the reverse humeral implant of FIG. 1A;
[0010] FIG. 2A is an exploded front perspective view of the reverse humeral implant of FIG. 1A;
[0011] FIG. 2B is an exploded rear perspective view of the reverse humeral implant of FIG. 1A;
[0012] FIG. 3 A is an enlarged partial front view of a top portion of a plate of the reverse humeral implant of FIG. 1A;
[0013] FIG. 3B is an enlarged partial side view of the top portion of the plate of the reverse humeral implant of FIG. 1A;
[0014] FIG. 4A is a partial top view of a socket of the reverse humeral implant of FIG. 1A;
[0015] FIG. 4B is a partial perspective view of the socket of the reverse humeral implant of FIG. 1A;
[0016] FIG. 5 is a partial cross-sectional side view of the socket of the reverse humeral implant of FIG. 1A;
[0017] FIG. 6A is an assembled front perspective view of an anatomic humeral implant, according to some implementations of the present disclosure;
[0018] FIG. 6B is an assembled rear perspective view of the anatomic humeral implant of FIG. 6A;
[0019] FIG. 7A is an exploded front perspective view of the anatomic humeral implant of FIG. 6A;
[0020] FIG. 7B is an exploded rear perspective view of the anatomic humeral implant of FIG. 6A;
[0021] FIG. 8 is a cross-sectional view of a socket and a humeral head component of the anatomic humeral implant of FIG. 6A;
[0022] FIG. 9 is an exploded view of the humeral head component and a humeral head adapter component of the anatomic humeral implant of FIG. 6A;
[0023] FIG. 10A is an assembled front perspective view of a reverse humeral implant, according to some implementations of the present disclosure; and
[0024] FIG. 10B is an assembled rear perspective view of the reverse humeral implant of FIG. 10 A.
[0025] While the present disclosure is susceptible to various modifications and alternative forms, specific implementations have been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that it is not intended to limit the present disclosure to the particular forms disclosed, but on the contrary, the present disclosure is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.DETAILED DESCRIPTION
[0026] The present disclosure is described with reference to the attached figures, wherein like reference numerals are used throughout the figures to designate similar or equivalent elements.Several aspects of the present disclosure are described below with reference to example implementations for illustration.
[0027] Described herein are systems, methods, and apparatuses that seek to minimize, if not eliminate, the drawbacks of the currently available humeral implants, especially for patients with severe proximal humeral bone loss.
[0028] Referring generally to FIGS. 1A-5, a reverse humeral implant 100 is shown according to some implementations of the present disclosure. The humeral implant 100 includes a body 110 (best shown in FIGS. IB and 2B) with a socket 120 (best shown in FIGS. 2A and 4A), a stem 130 (best shown in FIGS. IB and 2B), and a plate 140 (best shown in FIGS. 1A and 2 A).
[0029] Referring to FIG. IB, the body 110 of the reverse humeral implant 100 has a first portion 112 and a second portion 116. The first portion 112 couples to the stem 130 at a distal end 114 of the first portion 112 of the body 110. The second portion 116 of the body 110 is coupled to the first portion 112 and defines an opening 118 (shown in FIGS. 2A-2B and 4A- 4B) at a proximal end portion 117 of the second portion 116 of the body 110. The opening 118 leads into the socket 120 (shown in FIGS. 2A-2B and 4A-4B) of the body 110. The first portion 112 of the body 110 is shaped and arranged to be positioned partially or entirely within a prepared humerus bone of an individual undergoing a shoulder joint replacement surgery. The second portion 116 of the body 110 is shaped and arranged to be positioned primarily outside of the prepared humerus bone. In some implementations, the first portion 112 of the body 110 is monolithic with the second portion 116 of the body 110. In other implementations, the first portion 112 of the body 110 is removably coupled to the second portion 116 of the body 110.
[0030] Referring to FIG. 4B, the body 110 has a fastener aperture 119 shaped and arranged to accept a fastener. In some implementations, the body 110 has zero, one, two, three, four, five, or more fastener apertures that are the same as, or similar to, the fastener aperture 119. In some implementations, either the first portion 112 of the body 110 or the second portion 116 of the body 110 includes the fastener aperture 119. In other implementations, both the first portion 112 and the second portion 116 of the body 110 have one or more fastener apertures 119.
[0031] As shown best in FIGS. IB and 2B, the stem 130 extends from the distal end 114 of the first portion 112 of the body 110 and is shaped to be positioned inside the prepared humerus bone of the individual. The stem 130 has a central axis 132 that is parallel to a length of the stem 130. As best shown in FIG. IB, the stem 130 has a flute 134 that is generally parallel with the central axis 132 of the stem 130. The flute 134 can assist in avoiding rotational movement of the stem 130 within the humerus bone. In some alternative implementations, the stem 130includes 2 or more flutes (e.g., two flutes, three flutes, four flutes, five flutes, etc.) that are the same as, or similar, to the flute 134, that are spaced circumferentially around the stem 130. In some implementations, the flutes 134 are spaced apart in a range between about 30 and 180 degrees, 45 and 120 degrees, and / or 60 and 90 degrees. In other implementations, the stem 130 has only one flute 134 or no flutes 134.
[0032] In some implementations, the stem 130 is monolithic with the first portion 112 of the body 110. In other implementations, the stem 130 is removably coupled to the distal end 114 of the first portion 112 of the body 110. For example, in some such implementations, the stem 130 is threadingly coupled to the body 110 via a screw type fastener. For another example, the stem 130 is coupled to the body 110 via a press fit connection, a Morse taper connection, an interference connection, a glue connection, a welded connection, or any combination thereof.
[0033] As best shown in FIGS. 4A and 4B, the plate 140 is coupled to and extends from the proximal end portion 117 of the second portion 116 of the body 110. As best shown in FIGS. 1A-1B, the plate 140 then extends alongside, and is spaced apart from, the body 110 and the stem 130. The plate 140 is arranged such that a first side 142 (FIGS. IB, 3B) of the plate 140 generally faces the body 110 and the stem 130 and a second opposing side 146 (FIGS. 1A and 3A) of the plate 140 generally faces away from the body 110 and the stem 130.
[0034] The first side 142 of the plate 140 has a protrusion 144 (best shown in FIG. 3B) that is shaped and arranged to cooperate with a bicipital groove of the prepared humerus bone. In some implementations, the protrusion 144 is shaped to interact with the bicipital groove between lesser and greater tuberosities of the prepared humerus bone. In some implementations, the first side 142 of the plate 140 has an osteogenic coating to promote bone ingrowth and / or ongrowth and further mitigate the potential of micromotion. The osteogenic coating can take any suitable form. For example, the osteogenic coating can include one or more of fair or coarse particulate metal (such as titanium or alumina), hydroxyapatite, calcium phosphate, zoledronic acid, etc. According to some implementations, the osteogenic coating has a smooth surface, a bumpy surface, a grooved surface, or a combination thereof. In some implementations, a thickness of the osteogenic coating is uniform or nearly uniform on the first side 142 of the plate 140. However, such is not required. For example, in some embodiments, the thickness, or width, of the osteogenic coating varies along a length of the plate 140. For example, according to various implementations, the osteogenic coating has a uniform thickness, a non-uniform thickness, and / or a tapered thickness. However, the osteogenic coating is not required, and in some embodiments, the first side 142 of the plate 140 does not have an osteogenic coating.
[0035] The second side 146 of the plate 140 has an indentation 148 (best shown in FIG. 3 A) shaped and arranged to aid in positioning a portion of a bicep of the individual. In some implementations, the indentation 148 is positioned alongside a bicipital tendon or a tendon of a long head of the bicep of the individual. In some implementations, the protrusion 144 and the indentation 148 are aligned with each other. In some implementations, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, or more of the protrusion 144 is aligned with the indentation 148. In some implementations, the protrusion 144 extends about the same amount length-wise along the plate 140 as the indentation 148. In other implementations, the protrusion 144 extends further length-wise along the plate 140 than the indentation 148. In some implementations, the indentation 148 extends further length- wise along the plate 140 than the protrusion 144.
[0036] The protrusion 144 may be positioned, for example, as a plate support in situations of complete proximal humeral bone loss. In some implementations, and preferably for situations in which the protrusion 144 is positioned medio laterally, the protrusion 144 has a height extending from the plate 140 between about 0.1 and about 30 millimeters. In some implementations, and preferably for situations in which the protrusion is positioned suprainferiorly, the protrusion 144 has a height extending from the plate 140 between about 0.1 and about 50 millimeters. In some implementations, the protrusion 144 has a height extending from the plate 140 in a range from about 0.1 to about 50 millimeters, from about 0.5 to about 40 millimeters, from about 1 to about 30 millimeters, from about 1.25 to about 20 millimeters, from about 1.5 to about 10 millimeters, and / or from about 2 to about 7 millimeters.
[0037] In some implementations, the indentation 148 has a depth in a range from about 0.1 to about 30 millimeters, from about 0.5 to about 20 millimeters, from about 1 to about 10 millimeters, from about 1.5 to about 8 millimeters, from about 2 to about 5 millimeters, and / or from about 2.5 to about 3.5 millimeters.
[0038] Referring to FIG. IB, the body 110 and the stem 130, cumulatively, have a first length 136, and the plate 140 has a second length 149. The first length 136 and the second length 149 can be any suitable length, respectively. In some implementations, the first length 136 is greater than the second length 149. In other implementations, the second length 149 is greater than the first length 136. In some implementations, the first length 136 is about the same as the second length 149. In some implementations, the first length 136 is in a range from about 0.1 to about 100 millimeters, from about 1 to about 90 millimeters, from about 5 to about 80 millimeters, from about 10 to about 75 millimeters, and / or from about 50 to about 70 millimeters. In some implementations, the second length 149 is in a range from about 0.1 to about 100 millimeters,from about 10 to about 90 millimeters, from about 20 to about 80 millimeters, from about 35 to about 75 millimeters, and / or from about 50 to about 70 millimeters.
[0039] As shown best in FIG. 2A, the plate 140 has four fastener apertures 190A-D shaped and arranged to accept fasteners 197A-D. The fastener apertures 190A-D have threads 192A- D to cooperate with threaded heads 198A-D of the fasteners 197A-D. In some implementations, the fastener apertures 190A-D are non-threaded. In some implementations, the fasteners 197A-D do not have threaded heads 198A-D and are inserted, for example, via a press fit connection, a Morse taper connection, an interference connection, a glue connection, a welded connection, or any combination thereof. In some implementations, some of the fastener apertures 190A-D are threaded, and some are non-threaded. Similarly, and in some implementations, some of the fasteners 197A-D have threaded heads 198A-D and some do not. In some implementations, the plate 140 has zero, one, two, three, four, five, or more fastener apertures 190A-D. In some implementations, the plate 140 does not have the fastener aperture 190A. For example, the fastener aperture 190A is not included for certain bone shapes, sizes, and / or conditions.
[0040] The plate 140 also has four dual fastener apertures 194A-D. Each dual fastener aperture 194A-D has a first portion 195A-D and a second portion 196A-D. The first portions 195A-D of the dual fastener apertures 194A-D are threaded and the second portions 196A-D of the dual fastener apertures 194A-D are non-threaded. For example, the first portions 195A-D of the dual fastener apertures 194A-D are threaded to cooperate with threaded heads 198E-H of fasteners 197E-H. As another example, the second portions 196A-D of the dual fastener apertures 194A-D are non-threaded to cooperate, for example, with threaded fasteners 197E- H or non-threaded fasteners (not shown) via a press fit connection, a Morse taper connection, an interference connection, a glue connection, a welded connection, or any combination thereof.
[0041] In some implementations, some or all of the fastener apertures 190A-D and / or dual fastener apertures 194A-D are positioned such that a fastener 197A-H seated within one of the fastener apertures 190A-D and / or one of the dual fastener apertures 194A-D does not contact the stem 130. In some implementations, one or more of the fastener apertures 190A-D and / or dual fastener apertures 194A-D are positioned such that a fastener 197A-H seated within the fastener aperture 190A-D and / or dual fastener aperture 194A-D does contact the stem 130.
[0042] As best shown in FIGS. 1A and IB, one of the fastener apertures 190D (shown in FIG. 1A) is shaped and positioned such that a corresponding fastener 197D (shown in FIG. IB), when inserted into the fastener aperture 190D, further extends into the first portion 112 of thebody 110 via the fastener aperture 119 (shown in FIG. IB) of the body 110. For example, the insertion of the fastener 197D through both the fastener aperture 190D and the first portion 112 of the body 110 assists in avoiding rotational movement between the plate 140 and the first portion 112 of the body 110. In some implementations, no fasteners 197A-H extend through the body 110. In other implementations, one, two, three, four, or more fasteners 197A-H extend through the body 110.
[0043] As best shown in FIGS. IB and 2B, the plate 140 has three segments. A first segment 150 of the plate 140 extends from the proximal end portion 117 of the second portion 116 of the body 110 in a first direction 152 away from the body 110. A second segment 160 of the plate 140 extends from the first segment 150 in a second direction 162 away from the first segment 150. A third segment 170 of the plate 140 then extends from the second segment 160 in a third direction 172 away from the second segment 160 of the plate 140. In some implementations, the third direction 172 is generally parallel with the central axis 132 of the stem 130 such that the third segment 170 extends generally parallel with the central axis 132 of the stem 130.
[0044] In some implementations, the first direction 152 is generally co-planar with the outermost edge of the socket 120. However, this is not required, and in some implementations, the first direction 152 is at an acute or obtuse angle with the plane of the outermost edge of the socket 120. For example, the first direction 12 may be angled about 150 degrees, about 140 degrees, about 130 degrees, about 120 degrees, about 110 degrees, about 100 degrees, 90 degrees, about 80 degrees, about 70 degrees, about 60 degrees, about 50 degrees, about 40 degrees, about 30 degrees, and / or less than 30 degrees from the plane of the outermost edge of the socket 120. In some implementations, the second direction 162 is generally perpendicular to the first direction 152. For example, the second direction 162 may be angled from about 50 degrees to about 130 degrees, from about 60 degrees to about 120 degrees, from about 70 degrees to about 110 degrees, from about 80 degrees to about 100 degrees, and / or from about 85 degrees to about 95 degrees from the first direction 152.
[0045] In some implementations, the protrusion 144 extends through a full length of the second segment 160 of the plate 140. In other implementations, the protrusion 144 extends through a portion of the length of the second segment 160 of the plate 140, for example, at least 1%, at least 5%, at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, and / or at least 90% of the length of the second segment 160 of the plate 140. In some implementations, the protrusion 144 does not extend into the third segment
[0046] In some implementations, the indentation 148 extends through the full length of the second segment 160 of the plate 140. In other implementations, the indentation 148 extends through a portion of the length of the second segment 160 of the plate 140, for example, at least 1%, at least 5%, at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, and / or at least 90% of the length of the second segment 160 of the plate 140. In some implementations, the indentation 148 does not extend into the third segment 170 of the plate 140. In some implementations, the indentation 148 extends through a portion of a length of the first segment 150 of the plate 140, for example, at least 1%, at least 5%, at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, and / or at least 90% of the length of the first segment 150 of the plate 140.
[0047] As shown in FIG. IB, the second segment 160 of the plate 140 has a distal segment 166 and a proximal segment 169. The distal segment 166 has a distal end 164 that couples to the third segment 170 of the plate 140. The proximal segment 169 has a proximal end 168 that couples to the first segment 150 of the plate 140. In some implementations, the second segment 160 of the plate 140 extends in a curved fashion such that the distal end 164 of the second segment 160 is closer to the central axis 132 of the stem 130 than the proximal end 169 of the second segment 160. In some implementations, the proximal segment 169 is rotated at least about 20 degrees, at least about 15 degrees, at least about 10 degrees, at least about 5 degrees, and / or at least about 1 degree relative to the distal segment 166. As shown best in FIGS. 3 A and 3B, the arrangement, curvature, and twisting of the plate 140 assists the plate 140 in cooperating with the bicipital groove of the prepared humerus bone.
[0048] Referring now to FIG. 3B, the reverse humeral implant 100 has a flange 180 coupled to the first side 142 of the plate 140 and the second portion 116 of the body 110. The flange 180 aids in strengthening the coupling between the plate 140 and the second portion 116 of the body 110. The flange 180 has a length 184 extending along the plate 140. In some implementations, the length 184 of the flange 180 is between about 0.1 and about 70 millimeters, between about 0.1 and about 60 millimeters, between about 0.1 and about 50 millimeters, between about 1 and 40 millimeters, between about 2 and 30 millimeters, between about 3 and 20 millimeters, and / or between about 5 and 10 millimeters. The flange 180 has a height 186 extending from the second portion 116 of the body 110 to the plate 140. In some implementations, the height is between about 0.1 and 30 millimeters, between about 1 and 20 millimeters, and / or between about 5 and 10 millimeters. As shown in FIG. 5, the flange 180 also has a thickness 188. In some implementations, the thickness 188 of the flange 180 isbetween about 0.1 and 30 millimeters, between about 1 and 20 millimeters, and / or between about 5 and 10 millimeters.
[0049] As shown in FIG. 3B, the flange 180 has attachment apertures 182A-D. The attachment apertures 182A-D are useful for suturing bone fragments or other tissues to the reverse humeral implant 100. The attachment apertures 182A-D are shaped to accept sutures, screws, or other fasteners.
[0050] Referring generally to FIGS. 4A and 4B, the socket 120 of the body 110 is shown in more detail. As shown best in FIG. 4 A, the socket 120 has three tool slots 129A-C that are shaped and arranged to cooperate with a humeral implant removal tool. For example, the tool slots 129A-C are useful for aiding a humeral implant removal tool in gripping the body 110 and removing the stem 130 during a revision surgery. In some implementations, the socket 120 does not have any tool slots 129. In other implementations, the socket 120 has one, two, three, four, five, or more tool slots 129.
[0051] Referring to FIG. 5, the socket 120 of the body 110 is shaped and arranged to receive a liner 122. The liner 122 is shaped and arranged to accept and / or abut a glenosphere component (not shown). In some implementations, the liner 122 and the socket 120 are shaped and arranged to engage with each other in a snap-in fashion. In some implementations, and as best shown in FIGS. 4A and 4B, the socket 120 has cutouts that are shaped and arranged for the liner 122 to be pushed into the socket 120 and then twisted into a locked- in position.
[0052] While FIGS. 1A-5 describe a reverse humeral implant 100 with a body 110, a socket 120, a stem 130, aplate 140, and a flange 180, the discussion of FIGS. 6A-9 provide additional details regarding an anatomic humeral implant 200 including a body 200, a socket 220, a stem 230, a plate 240, and a flange 280.
[0053] Referring generally to FIGS. 6A-9, an anatomic humeral implant 200 includes a body 210 (best shown in FIGS. 6B and 7B), a socket 220 (best shown in FIGS. 7B and 8), a stem 230 (best shown in FIGS. 6B and 7B), a plate 240 (best shown in FIGS. 6A and 7A), and a flange 280 (best shown in FIG. 7B and 8), which are the same as, or similar to, the body 110, the socket 120, the stem 130, the plate 140, and the flange 180 of the reverse humeral implant 100 shown in FIGS. 1A-5 and described herein. The primary difference between the reverse humeral implant 100 and the anatomic humeral implant 200 is that the anatomic humeral implant 200 includes a glenosphere component 224 (shown in FIGS. 6A-6B and in the glenosphere components’ 224 individual components in FIGS. 7 A and 7B) instead of the liner 122. For example, the reverse humeral implant 100 is utilized in reverse shoulder replacementsurgeries and the anatomic humeral implant 200 is utilized in anatomic shoulder replacement surgeries.
[0054] Referring now to FIGS. 8 and 9, components of the glenosphere component 224 are shown in more detail. As shown best in FIG. 9, the glenosphere component 224 includes a humeral head adapter component 226, a humeral head component 227, and a humeral head fastener 228. As shown in FIG. 8, the socket 220 is shaped and arranged to receive the humeral head adapter component 226. The humeral head fastener 228 is insertable through the humeral head adapter component 226 and into the socket 220. The humeral head component 227 is shaped and arranged to engage with the humeral head adapter component 226. The humeral head fastener 228, however, is not necessary, and in some implementations, the anatomic humeral implant 200 does not include a humeral head fastener 228. In some implementations, one, two, three, four, five, or more humeral head fasteners 228 are utilized in affixing the humeral head adapter component 226 to the socket 220.
[0055] In some implementations, the humeral head adapter component 226 and the socket 220 are shaped and arranged to engage with each other in a snap-in fashion. In some implementations, the socket 220 has cutouts that are shaped and arranged for the humeral head adapter component 226 to be pushed into the socket 220 and then twisted into a locked-in position.
[0056] Referring generally to FIGS. 10A-10B, a reverse humeral implant 300 includes a body 310 (best shown in FIG. 10B), a socket 320, a stem 330 (best shown in FIG. 10B), a plate 340 (best shown in FIG. 10A), and a flange 380 (shown in FIG. 10B), which are the same as, or similar to, the body 110, 210, the socket 120, 220, the stem 130, 230, the plate 140, 240, and the flange 180, 280 of the reverse humeral implant 100 shown in FIGS. 1A-5 and the anatomic humeral implant 200 shown in FIGS. 6A-9, and described herein. One primary difference between the reverse humeral implant 100 and the reverse humeral implant 300 is the point of attachment of the respective plates 140, 340 to the respective bodies 110, 310. The following references to clock positions are made with respect to FIG. 10A, from the perspective of one facing the socket 320, and with the top-moist point of the socket 320 being twelve o’clock. In the reverse humeral implant 300, the plate 340 is attached to the body 310 between the two o’clock and three o’clock positions. In other words, the plate 380 is positioned between the lateral and posterior sides of the socket 320. However, this is not required, and in some implementations, the plate 340 is attached to the body 310 at any suitable position. For example, the plate 340 can attach to the body 310 generally at the twelve o’clock, one o’clock,two o’clock, three o’clock, four o’clock, five o’clock, six o’clock, seven o’clock, eight o’clock, nine o’clock, ten o’clock, or eleven o’clock position.
[0057] Additionally, a top section of the plate 340 has a smoother curvature than the plate 140 because the plate 340 is not interrupted by the fastener 190A that is shown in FIG. 1 A. Because the plate 340 utilizes fewer or no fasteners at the top section of the plate 340, there is a greater amount of space between the plate 340 and the body 310 of the reverse humeral implant 300. This space assists in accommodating larger or differently sized bones. In some implementations, the curvature of the plate 340 is shaped and / or the height of the flange 380 is sized to accommodate bones of various shapes and sizes.
[0058] While the present disclosure has been described with reference to one or more particular embodiments or implementations, those skilled in the art will recognize that many changes may be made thereto without departing from the spirit and scope of the present disclosure. Each of these implementations and obvious variations thereof is contemplated as falling within the spirit and scope of the present disclosure. It is also contemplated that additional implementations according to aspects of the present disclosure may combine any number of features from any of the implementations described herein.
Claims
CLAIMSWHAT IS CLAIMED IS:
1. A humeral implant comprising: a body having a first portion and a second portion, the first portion of the body being configured to be positioned generally within a prepared humerus bone of an individual, the second portion of the body being configured to be positioned generally outside of the prepared humerus bone of the individual, a proximal end portion of the second portion of the body defining an opening that leads into a socket of the body; a stem coupled to a distal end of the first portion of the body such that the stem is configured to be positioned inside of the prepared humerus bone of the individual; and a plate coupled to and extending from the proximal end portion of the second portion of the body, the plate further extending generally alongside the body and at least a portion of the stem such that the plate is spaced apart from the stem, the plate having a first side that generally faces the body and the stem and a second opposing side that generally faces away from the body and the stem, the first side of the plate having a protrusion configured to cooperate with a portion of a bicipital groove of the prepared humerus bone of the individual, the second opposing side of the plate having an indentation configured to aid in positioning a portion of a bicep of the individual.
2. The humeral implant of claim 1, wherein the protrusion is shaped to interact with the bicipital groove between lesser and greater tuberosities of the prepared humerus bone of the individual.
3. The humeral implant of claim 1 or claim 2, wherein the plate has: a first segment that extends in a first direction away from the body; a second segment that extends in a second direction away from the first segment of the plate; and a third segment that extends in a third direction away from the second segment of the plate.
4. The humeral implant of claim 3, wherein the second segment extends generally perpendicular to the first direction and in a curved fashion such that a distal end of the second segment is closer to a central axis of the stem than a proximal end of the second segment.
5. The humeral implant of claims 3 or claim 4, wherein the third segment extends from the second segment such that the third segment is generally parallel with a central axis of the stem.
6. The humeral implant of any one of claims 3 - 5, wherein the second segment of the plate has a proximal segment and a distal segment, the proximal segment being rotated at least about ten degrees relative to the distal segment.
7. The humeral implant of any one of claims 3 - 6, wherein the protrusion extends along at least a portion of the second segment of the plate.
8. The humeral implant of claim 7, wherein the protrusion does not extend into the third segment of the plate.
9. The humeral implant of any one of claims 1 -8, wherein the protrusion has a height between about 0.1 millimeters and about 30 millimeters.
10. The humeral implant of any one of claims 3 - 9, wherein the indentation extends along at least a portion of the second segment of the plate.
11. The humeral implant of any one of claims 3 - 10, wherein the indentation extends along at least a portion of the first segment of the plate.
12. The humeral implant of any one of claims 3 - 11, wherein the indentation does not extend into the third segment of the plate.
13. The humeral implant of any one of claims 1 - 12, wherein the indentation is of a depth between about 0.1 millimeters and about 30 millimeters.
14. The humeral implant of any one of claims 1 - 13, wherein the protrusion is generally aligned with the indentation.
15. The humeral implant of any one of claims 1 - 14, further comprising a flange coupled to the first side of the plate and the second portion of the body to aid in strengthening the coupling of the plate with the second portion of the body.
16. The humeral implant of claim 15, wherein the flange includes a plurality of attachment apertures configured to accept a suture.
17. The humeral implant of claims 15 or claim 16, wherein the flange has a length along the plate between about 0.1 millimeters and about 50 millimeters.
18. The humeral implant of anye one of claims 15 - 17, wherein the flange has a height extending from the second portion of the body between about 0.1 millimeters and about 30 millimeters.
19. The humeral implant of any one of claims 15 - 18, wherein the flange has a thickness between about 0.1 millimeters and about 30 millimeters.
20. The humeral implant of any one of claims 1 - 19, wherein the stem is monolithic with the first portion of the body.
21. The humeral implant of any one of claims 1 - 20, wherein the stem is removably coupled to the distal end of the first portion of the body.
22. The humeral implant of any one of claims 1 - 21, wherein the socket is configured to receive at least a portion of a liner, the liner being configured to abut a glenosphere component.
23. The humeral implant of claim 22, wherein the liner is configured to engage with the socket in a snap-in fashion.
24. The humeral implant of any one of claims 1 - 23, wherein the socket is configured to receive at least a portion of a humeral head adapter component, the humeral head adapter component being configured to engage with a humeral head component.
25. The humeral implant of claim 24, wherein the humeral head adapter component is configured to be fixed to the socket via a fastener.
26. The humeral implant of any one of claims 1 - 25, wherein the stem includes a plurality of circumferentially spaced apart flutes.
27. The humeral implant of any one of claims 1 - 26, wherein the plate includes a plurality of fastener apertures.
28. The humeral implant of claim 27, wherein at least a portion of the plurality of fastener apertures are threaded.
29. The humeral implant of claim 27 or claim 28, wherein a first fastener aperture of the plurality of fastener apertures is positioned such that a fastener seated within the first fastener aperture does not contact the stem.
30. The humeral implant of any one of claims 1 - 29, wherein the plate includes a dual fastener aperture.
31. The humeral implant of claim 30, wherein a first portion of the dual fastener aperture is threaded and a second portion of the dual fastener aperture is non-threaded such that either a first fastener with a threaded head is configured to be threadingly coupled with the first portion of the dual fastener aperture or a second fastener with a non-threaded head is configured to be coupled with the second portion of the dual fastener aperture in a non-threaded fashion.
32. The humeral implant of any one of claims 1 - 31, wherein the socket includes a tool slot configured to cooperate with a humeral implant removal tool to aid in assisting with gripping the body and removing the stem and body during a revision surgery.
33. The humeral implant of any one of claims 1 - 32, wherein the stem and body cumulatively have a first length and the plate has a second length that is greater than the first length.
34. The humeral implant of any one of claims 1 - 33, wherein the the stem and body cumulatively have a first length and the plate has a second length that is less than the first length.
35. The humeral implant of any one of claims 1 - 34, further comprising a fastener coupled to the plate such that at least a portion of the fastener extends into the first portion of the body.
36. A humeral implant comprising: a body having a first portion and a second portion, a proximal end portion of the second portion of the body defining an opening that leads into a socket of the body; a stem coupled to a distal end of the first portion of the body such that the stem extends away from the body; and a plate coupled to and extending from the proximal end portion of the second portion of the body, the plate further extending generally alongside the body and at least a portion of the stem and being spaced apart therefrom, the plate having a first side that generally faces the body and the stem and a second opposing side that generally faces away from the body and the stem, the first side of the plate having a protrusion, the second opposing side of the plate having an indentation.
37. The humeral implant of claim 36, wherein the protrusion is configured to cooperate with a portion of a bicipital groove of a humerus bone, and wherein the indentation is configured to aid in positioning a portion of a bicep muscle.