Multiple superior inferior peripheral screw hole glenoid baseplate

Abstract

A glenoid baseplate (200) can include a baseplate body (210), the baseplate body including a plurality of mounting holes extending though the baseplate body, and wherein three or more (230, 232, 234, 236, 238) of the plurality of mounting holes form a first group of interconnected holes (220) in a superior portion of the baseplate body and three or more (240, 242, 244, 246, 248) of the plurality of mounting holes form a second group of interconnected holes (222) in an inferior portion of the baseplate body.

Description

MULTIPLE SUPERIOR INFERIOR PERIPHERAL SCREW HOLE GLENOID BASEPLATECLAIM OF PRIORITY

[0001] This application claims the benefit of U.S. Provisional Patent Application Serial No. 63 / 638,247, filed on April 24, 2024, the benefit of priority of which is claimed hereby, and which is incorporated by reference herein in its entirety.TECHNICAL FIELD

[0002] The present application relates to an orthopedic system and specifically to a shoulder implant system.BACKGROUND

[0003] In a healthy shoulder, the proximal humerus is generally ball-shaped, and articulates within a socket formed by the scapula, called the glenoid, to form the shoulder joint. Some implant systems for the total replacement of the shoulder joint generally replicate the natural anatomy of the shoulder. Such implant systems can include a humeral component having a stem that fits within the humeral canal, and an articulating head that articulates within the socket of a glenoid component implanted within the glenoid of the scapula.

[0004] Reverse-type shoulder implant systems have been developed in which the conventional ball-and-socket configuration that replicates the natural anatomy of the shoulder is reversed, such that a concave recessed articulating component is provided at the proximal end of the humeral component that articulates against a convex portion of a glenosphere of a glenoid component implanted within the glenoid of the scapula.

[0005] In either case, the glenoid component is typically mounted to a glenoid baseplate that is mounted within the glenoid. Glenoid baseplate implants commonly feature four peripheral screw holes arranged at a 90-degree pitch angle. For optimal fixation strength, it is recommended to position the superior screw at the base of the coracoid and the inferior screw at the pillar of the scapula so that longer screws can be used for maximum fixation strength. However, the location of the base of thecoracoid is not always 180 degrees opposite to location of the pillar of the scapula. This anatomic variation results in a scenario where screws cannot be placed at their ideal superior and inferior locations on the scapula thereby resulting in sub-optimal baseplate fixation strength.OVERVIEW

[0006] To further illustrate apparatuses and methods disclosed herein, a nonlimiting list of examples is provided here:

[0007] Example 1 is an apparatus including a glenoid baseplate including a baseplate body, the baseplate body including a plurality of mounting holes extending though the baseplate body, and wherein three or more of the plurality of mounting holes form a first group of interconnected holes in a superior portion of the baseplate body and three or more of the plurality of mounting holes form a second group of interconnected holes in an inferior portion of the baseplate body.

[0008] Example 2 is the apparatus of Example 1, wherein optionally each of the holes of the first group and the second group of interconnected holes are positioned such that a distance between a center point of a first hole and a center point of a second, adjacent hole is less than a diameter of each of the holes.

[0009] Example 3 is the apparatus of any of Examples 1-2, wherein optionally each hole in the first group and the second group of interconnected holes is open to any adjacent holes in the first group and the second group of interconnected holes.

[0010] Example 4 is the apparatus of any of Example 1-3, wherein optionally one or more of the holes in the first group and the second group include threaded holes.

[0011] Example 5 is the apparatus of any of Examples 1-4, wherein optionally one or more of the holes in the first group and the second group are configured to allow a mounting screw to be angled relative to the baseplate body.

[0012] Example 6 is the apparatus of any of Examples 1-5, wherein optionally the first group of interconnected holes are positioned and configured to permit a first mounting screw to be mounted to a base of a coracoid though one of the interconnected holes in the first group and the second group of interconnected holesare positioned and configured to permit a second mounting screw to be mounted to a pillar of a scapula.

[0013] Example 7 is the apparatus of any of Examples 1-6, wherein optionally the first and second groups of holes are peripheral holes proximate an outer edge of the baseplate body.

[0014] Example 8 is the apparatus of any of Examples 1-7, wherein optionally the baseplate body includes a central hollow male taper configured to receive a mounting screw.

[0015] Example 9 is the apparatus of any of Examples 1-7, wherein optionally the baseplate body includes a central solid male taper.

[0016] Example 10 is the apparatus of any of Example 1-7, wherein optionally the baseplate body includes a central female taper within a mounting post.

[0017] Example 11 is the apparatus of any of Examples 1-10, wherein optionally the baseplate body further includes two separate and unconnected side mounting holes.

[0018] Example 12 is the apparatus of any of Examples 1-11, wherein optionally each hole in the first group and the second group of interconnected holes is an independent hole configured to receive a mounting screw while also being interconnected to any adjacent holes.

[0019] Example 13 is the apparatus of any of Examples 1-12, wherein optionally each hole in the first group and the second group of interconnected holes defines a partial hole having at least upper and lower arcs defining an outer periphery of the hole while sides of the hole are open to any adjacent holes in the first group and the second group of interconnected holes.

[0020] Example 14 includes a method for mounting a glenoid baseplate to a glenoid cavity. The method can include placing the glenoid baseplate on the glenoid bone at an orientation such that one hole of a first group of interconnected holes on a superior side of the baseplate is located at a base of a coracoid, inserting a first peripheral screw through the one hole of the first group of interconnected holes into the base of the coracoid, and inserting a second peripheral screw through onehole of a second group of interconnected holes on an inferior side of the baseplate such that the second peripheral screw is positioned at a pillar of a scapula.

[0021] Example 15 is the method of Example 14, wherein optionally the one hole of the first group and the one hole of the second group can be determined during pre-operative planning using body images and scans to determine a location of the base of the coracoid and a location of the pillar of the scapula.

[0022] Example 16 is the method of any of Examples 14-15, wherein optionally the baseplate can be configured to receive a glenosphere or a concave articulating glenoid component.

[0023] Example 17 is the method of any of Examples 14-16, wherein optionally each of the holes of the first group and second group of interconnected holes are positioned such that a distance between a center point of a first hole and a center point of a second, adjacent hole is less than a diameter of each of the holes.

[0024] Example 18 is the method of any of Examples 14-17, wherein optionally each hole in the first group and the second group of interconnected holes is open to any adjacent holes in the first group and the second group of interconnected holes.

[0025] Example 19 is the method of any of Examples 14-18, wherein optionally one or more of the holes in the first group and the second group is configured to allow a mounting screw to be angled relative to a body of the baseplate.

[0026] Example 20 is the method of any of Examples 14-19, wherein optionally each hole in the first group and the second group of interconnected holes defines a partial hole having at least upper and lower arcs defining an outer periphery of the hole while the sides of the hole are open to any adjacent holes in the first group and the second group of interconnected holes.

[0027] In Example 21, the apparatuses or methods of any one or any combination of Examples 1-20 can optionally be configured such that all elements or combinations of elements or options recited are available to use or select from.

[0028] These and other examples and features of the present apparatuses and methods will be set forth in part in the following Detailed Description. This Overview is intended to provide non-limiting examples of the present subject matter - it is not intended to provide an exclusive or exhaustive explanation. The DetailedDescription below is included to provide further information about the present apparatus, systems, and methods.BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. Like numerals having different letter suffixes may represent different instances of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed in the present document.

[0030] FIG. 1 shows an arthroplasty system for a shoulder implant, in accordance with one embodiment.

[0031] FIG. 2 shows an arthroplasty system for a reverse shoulder implant, in accordance with one embodiment.

[0032] FIG. 3 shows lateral view of a scapula.

[0033] FIG. 4 shows top view of a glenoid baseplate, in accordance with one embodiment.

[0034] FIG. 5 shows a top perspective view of a glenoid baseplate, in accordance with one embodiment.

[0035] FIG. 6 shows a top perspective view of a glenoid baseplate, in accordance with one embodiment.

[0036] FIG. 7 shows a top perspective view of a glenoid baseplate, in accordance with one embodiment.

[0037] FIG. 8 shows a baseplate mounted to a glenoid cavity, in accordance with one embodiment.

[0038] FIG. 9 shows a method of mounting a glenoid baseplate, in accordance with one embodiment.DETAILED DESCRIPTION

[0039] As used herein, the following directional definitions apply. Anterior and posterior mean nearer the front or nearer the rear of the body, respectively,proximal, and distal mean nearer to or further from the root of a structure, respectively, and medial and lateral mean nearer the sagittal plane or further from the sagittal plane, respectively. The sagittal plane is an imaginary vertical plane through the middle of the body that divides the body into right and left halves.

[0040] FIG. 1 shows a schematic representation of arthroplasty system for an anatomic shoulder implant, in accordance with one embodiment. In this example, the system can include a humeral head 110 mounted to a humerus 10. The system further can include a complimentary component, such as a concave recessed articulating component 120 which can a bearing surface 124. The bearing surface 124 can define a concave bearing surface which articulates with the humeral head 110 after the implantation. The articulating component 120 can be configured to be mounted to a baseplate 130, which can be mounted to a scapula 20 proximate to a glenoid cavity using mounting screws 22, 24.

[0041] FIG. 2 shows an arthroplasty system for a reverse shoulder implant. Here a gl enosphere 111 can be mounted to the baseplate 130 mounted to the scapula 20 with mounting screws 22, 24, while the articulating component 120 can be mounted to the humerus 10.

[0042] FIG. 3 shows lateral view of a scapula 32 of a shoulder. The scapula 32 generally includes a glenoid bone 20 having a glenoid cavity 30. In a shoulder arthroplasty, the glenoid baseplate is generally mounted within the glenoid cavity 30. The scapula 32 further includes an acromion 38 a coracoid process 36, and a pillar of the scapula 34.

[0043] As noted above, glenoid baseplate implants commonly feature four peripheral screw holes arranged at a 90-degree pitch angle. Of all the screws, the superior and the inferior screws are considered to contribute most to the baseplate fixation. For optimal fixation strength, it is recommended to position the superior screw at the base of the coracoid 36, generally somewhere within an area 40, and the inferior screw at the pillar of the scapula 34, generally somewhere within an area 42 so that longer screws can be used for maximum fixation strength. However, due to anatomic variation among patients, the location of the base of the coracoid 36 is not always 180 degrees opposite to location of the pillar of the scapula 34. Thisanatomic variation results in a scenario where screws cannot be placed at their ideal superior and inferior locations on the scapula thereby resulting in sub-optimal baseplate fixation strength.

[0044] Accordingly, the present system provides a glenoid baseplate to offer more fixation options to the user.

[0045] FIG. 4 shows top view of a glenoid baseplate 200, in accordance with one embodiment.

[0046] Here, the glenoid baseplate 200 is one example of the baseplate 130 discussed above. Here, the glenoid baseplate 200 can include a baseplate body 210, which is configured to be mounted to the glenoid cavity 30 of a shoulder. The glenoid baseplate 200 can be configured to receive the glenosphere 111 in a reverse shoulder implant or the concave articulating component 120 for a standard shoulder arthroplasty. (See FIGs 1 and 2).

[0047] The baseplate body 210 can include a plurality of mounting holes extending though the baseplate body 210 from a front surface through to a back surface of the baseplate body 210 and configured to receive mounting screws. The mounting holes can include a plurality of mounting holes 230, 232, 234, 236, 238 forming a first group 220 of interconnected holes in a superior portion of the baseplate body 210. Likewise the baseplate body 210 can include a plurality of mounting holes 240, 242, 244, 246, 248 forming a second group 222 of interconnected holes in an inferior portion of the baseplate body 210.

[0048] In one example, each of the first group 220 and the second group 222 can include three or more mounting holes arranged at the outer periphery of the baseplate body 210.

[0049] Each of the holes in the groups 220, 222 of interconnected holes can define a partial outer surface defining the hole and each hole in the first and second groups 220, 222 of interconnected holes can be open to adjacent holes of the group. Referring to first group 220, the holes can be positioned such that a distance between a center point 231 of the first hole 230 and a center point 233 of the second, adjacent hole 232 is less than a diameter D of each of the holes 230-238. This is likewise true for the mounting holes in the second group 222 of holes.

[0050] Thus, each hole in the first group 220 and the second group 222 of interconnected holes defines a partial hole having at least upper and lower arcs defining an outer periphery of the hole while the sides of the hole are open to any adjacent holes in the first group and the second group of interconnected holes.

[0051] Accordingly, each hole in the first group 220 and the second group 222 of interconnected holes is open so as to share an open space or a shared open border with any adjacent holes in the first group and the second group of interconnected holes. For example, hole 230 and hole 232 are interconnected with a shared open space between them. Likewise hole 232 shares space with both the adjacent holes 230 and 234.

[0052] Each of the mounting holes in the first group 220 and the second group 222 of interconnected holes can be an independent hole configured to receive a mounting screw while also being interconnected and overlapping to any adjacent holes. This close grouping of the mounting holes allows the user to precisely choose the location for implanting a mounting screw.

[0053] In various embodiments, one or more of the holes in the first group 220 and the second group 222 can be angled relative to the baseplate body 210. In other examples, the holes can go perpendicularly though the body 210. In some examples, one or more of the holes can be configured to allow a mounting screw to go through the hole and have a trajectory so as to be oriented at an angle somewhere within a range of conical angles allowing for the user to precisely direct the screw as desired.

[0054] In one embodiment, the baseplate body 210 can further includes two separate and unconnected side mounting holes 214, 216 with one on each side of the baseplate body 210 and located between the first group and the second group. Furthermore, the baseplate 200 can further include a center hole 212 for receiving a mounting screw.

[0055] Referring also to FIG. 3, the first group 220 of interconnected holes can be positioned and configured to permit a first mounting screw to mounted to a base of a coracoid 36 somewhere in area 40 through one of the interconnected holes 230- 238 in the first group 220 and the second group of interconnected holes 240-248 arepositioned and configured to permit a second mounting screw to be mounted to the pillar of the scapula 34 somewhere with area 42. Thus, no matter the specific physiology of the shoulder, mounting screws can be properly attached without any compromise as to screw location. This allows for a maximum screw length to be sued since mounting at the base of the coracoid and the pillar of the scapula with a longer screw allows for more gripping purchase by the mounting screw.

[0056] FIG. 5 shows a top perspective view of a glenoid baseplate 200, in accordance with one embodiment.

[0057] In this example, the baseplate 200 can optionally include a hollow male taper 250 having a mounting hole 252 to receive a mounting screw and the male taper 250 can receive a component such as a glenosphere or an insert, as shown in FIGs 1 and 2. In some examples, the outside edge 208 of the baseplate 200 can include a tapered surface 260 to allow for the mounting a component. In some examples, the baseplate 200 can include locking features to hold an articulating liner for an anatomic implant.

[0058] The groups of holes 220 and 222 are as described above. Moreover, in this example or in any of the baseplates describe above or below, one or more of the mounting holes in each groups 220, 222 of interconnected holes can be threaded or unthreaded and can be configured to receive locking or non-locking type mounting screws.

[0059] FIG. 6 shows a top perspective view of a glenoid baseplate, in accordance with one embodiment. In this example, the baseplate 200 can include a solid male taper 270 to receive a shoulder component, as discussed above.

[0060] FIG. 7 shows a top perspective view of a glenoid baseplate, in accordance with one embodiment.

[0061] In this example, the glenoid baseplate 200 can include a central female taper 282 formed within a mounting post 280. In this example, the mounting post 280 can be mounted within a prepared hole in the glenoid cavity and the female taper 282 can be configured to receive a shoulder component.

[0062] FIG. 8 shows the baseplate 200 mounted to the glenoid cavity 30, in accordance with one embodiment.

[0063] FIG. 8 illustrates how any of the baseplates 200 described above can fit with the glenoid cavity 30 of the glenoid bone 20. Here, a mounting screw can be positioned in any one of the interconnected holes in the first group 220 of holes so that the screw will enter the base of the coracoid 36, no matter the physiology of the scapula 32. Likewise, a mounting screw can be placed within any hole in the second group of holes 222 so as be mounted to the pillar of the scapula 34. As noted above, one or more of the mounting holes can be configured to be angled or be configured to allow a mounting screw to be angled within a conical angle so as to define an axis in 3 -dimensional space.

[0064] Thus, no matter what the physiology of the body, the user can implant mounting screws in a desired position within the glenoid cavity without compromise.

[0065] FIG. 9 shows a method (300) of using the glenoid baseplates discussed herein. The method can generally include the user first reaming a glenoid bone to receive a glenoid baseplate. If the baseplate includes a mounting post, a post hole can be drilled. The method includes placing the glenoid baseplate on the glenoid bone at an orientation such that one hole of a first group of interconnected holes on a superior side of the base plate is located at a base of a coracoid (310), inserting a first peripheral screw through the one hole of the first group of interconnected holes into the base of the coracoid (320), and inserting a second peripheral screw through one hole of a second group of interconnected holes on an inferior side of the baseplate such that the second peripheral screw is positioned at a pillar of a scapula (330).

[0066] In some examples, the mounting hole of the first group and the mounting hole of the second group can be determined during pre-operative planning using body images and scans to determine a location of the base of the coracoid and a location of the pillar of the scapula. In other examples, the user can adapt and adjust which of the mounting holes to use during the implant. In some examples, if the baseplate includes a central mounting hole, a central screw can be mounted through the central mounting hole first.

[0067] As discussed, the baseplate can be configured to receive a glenosphere or a concave articulating glenoid component, such as a polyethylene insert. The glenosphere or other component can couple to the baseplate via a male or female taper or to a tapered outside peripheral edge surface of the glenoid baseplate.

[0068] In summary, present glenoid baseplate implants commonly feature four peripheral screw holes arranged at a 90-degree pitch angle. However, for optimal fixation strength, it is recommended to position the superior screw at the base of the coracoid and the inferior screw at the pillar of the scapula so that longer screws can be used for maximum fixation strength. However, the location of the base of the coracoid is not always 180 degrees opposite to location of the pillar of the scapula. Accordingly, the present baseplate design has multiple interconnected screw holes for the peripheral screws that allow for the superior and inferior screws to be placed at their ideal locations (base of coracoid and pillar of scapula).

[0069] The above detailed description includes references to the accompanying drawings, which form a part of the detailed description. The drawings show, by way of illustration, specific embodiments in which the invention can be practiced. These embodiments are also referred to herein as “examples.” Such examples can include elements in addition to those shown or described. However, the present inventors also contemplate examples in which only those elements shown or described are provided. Moreover, the present inventors also contemplate examples using any combination or permutation of those elements shown or described (or one or more aspects thereof), either with respect to a particular example (or one or more aspects thereof), or with respect to other examples (or one or more aspects thereof) shown or described herein.

[0070] In the event of inconsistent usages between this document and any documents so incorporated by reference, the usage in this document controls. In this document, the terms “a” or “an” are used, as is common in patent documents, to include one or more than one, independent of any other instances or usages of “at least one” or “one or more.” In this document, the term “or” is used to refer to a nonexclusive or, such that “A or B” includes “A but not B,” “B but not A,” and “A and B,” unless otherwise indicated. In this document, the terms “including” and “inwhich” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Also, in the following claims, the terms “including” and “comprising” are open-ended, that is, a system, device, article, composition, formulation, or process that includes elements in addition to those listed after such a term in a claim are still deemed to fall within the scope of that claim. Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

[0071] The above description is intended to be illustrative, and not restrictive.For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. Other embodiments can be used, such as by one of ordinary skill in the art upon reviewing the above description. The Abstract is provided to comply with 37 C.F.R. §1 72(b), to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. Also, in the above Detailed Description, various features may be grouped together to streamline the disclosure. This should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the Detailed Description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that such embodiments can be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

Claims

THE CLAIMED INVENTION IS:

1. A glenoid baseplate comprising: a baseplate body; and the baseplate body including a plurality of mounting holes extending though the baseplate body; wherein three or more of the plurality of mounting holes form a first group of interconnected holes in a superior portion of the baseplate body and three or more of the plurality of mounting holes form a second group of interconnected holes in an inferior portion of the baseplate body.

2. The glenoid baseplate of claim 1, wherein each of the holes of the first group and the second group of interconnected holes are positioned such that a distance between a center point of a first hole and a center point of a second, adjacent hole is less than a diameter of each of the holes.

3. The glenoid baseplate of claim 1, wherein each hole in the first group and the second group of interconnected holes is open to any adjacent holes in the first group and the second group of interconnected holes.

4. The glenoid baseplate of claim 1, wherein one or more of the holes in the first group and the second group include threaded holes.

5. The glenoid baseplate of claim 1, wherein one or more of the holes in the first group and the second group are configured to allow a mounting screw to be angled relative to the baseplate body.

6. The glenoid baseplate of claim 1, wherein the first group of interconnected holes are positioned and configured to permit a first mounting screw to be mounted to a base of a coracoid though one of the interconnected holes in the first group andthe second group of interconnected holes are positioned and configured to permit a second mounting screw to be mounted to a pillar of a scapula.

7. The glenoid baseplate of claim 1, wherein the first and second groups of holes are peripheral holes proximate an outer edge of the baseplate body.

8. The glenoid baseplate of claim 1, wherein the baseplate body includes a central hollow male taper configured to receive a mounting screw.

9. The glenoid baseplate of claim 1, wherein the baseplate body includes a central solid male taper.

10. The glenoid baseplate of claim 1, wherein the baseplate body includes a central female taper within a mounting post.

11. The glenoid baseplate of claim 1, wherein the baseplate body further includes two separate and unconnected side mounting holes.

12. The glenoid baseplate of claim 1, wherein each hole in the first group and the second group of interconnected holes is an independent hole configured to receive a mounting screw while also being interconnected to any adjacent holes.

13. The glenoid baseplate of claim 1, wherein each hole in the first group and the second group of interconnected holes defines a partial hole having at least upper and lower arcs defining an outer periphery of the hole while sides of the hole are open to any adjacent holes in the first group and the second group of interconnected holes.

14. A method for mounting a glenoid baseplate to a glenoid cavity, the method comprising:placing the glenoid baseplate on a glenoid bone at an orientation such that one hole of a first group of interconnected holes on a superior side of the baseplate is located at a base of a coracoid; inserting a first peripheral screw through the one hole of the first group of interconnected holes into the base of the coracoid; and inserting a second peripheral screw through one hole of a second group of interconnected holes on an inferior side of the baseplate such that the second peripheral screw is positioned at a pillar of a scapula.

15. The method of claim 14, wherein the one hole of the first group and the one hole of the second group are determined during pre-operative planning using body images and scans to determine a location of the base of the coracoid and a location of the pillar of the scapula.

16. The method of claim 14, wherein the baseplate is configured to receive a glenosphere or a concave articulating glenoid component.

17. The method of claim 14, wherein each of the holes of the first group and the second group of interconnected holes are positioned such that a distance between a center point of a first hole and a center point of a second, adjacent hole is less than a diameter of each of the holes.

18. The method of claim 14, wherein each hole in the first group and the second group of interconnected holes is open to any adjacent holes in the first group and the second group of interconnected holes.

19. The method of claim 14, wherein one or more of the holes in the first group and the second group are configured to allow a mounting screw to be angled relative to a body of the baseplate.

20. The method of claim 14, wherein each hole in the first group and the second group of interconnected holes defines a partial hole having at least upper and lower arcs defining an outer periphery of the hole while the sides of the hole are open to any adjacent holes in the first group and the second group of interconnected holes.

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