ORTHOPEDIC IMPLANT SYSTEM WITH REINFORCEMENT DEVICE

Abstract

The implant system includes a base plate having at least one through hole. A central screw extends from an underside of the base plate and is operable to secure the base plate to bone. At least one reinforcement device is operable to extend through the at least one through hole. The reinforcement device includes a post having a first end, a second end, and a length sized to allow the reinforcement device to traverse a bone defect when the base plate is secured to the bone. A fastener is located at the first end of the post. The fastener is operable to fasten to the base plate. A leg is located at the second end of the post. The leg is operable to abut a surface of the bone within the defect when the fastener is fastened to the base plate.

Description

[Technical field]

[0001] This application claims priority to U.S. provisional patent application Ser. No. 62 / 925,440, filed Oct. 24, 2019, entitled "ORTHOPEDIC IMPLANT SYSTEM HAVING AN ORTHOPEDIC IMPLANT SYSTEM AND METHOD OF USE THEREOF," which is incorporated herein by reference in its entirety.

[0002] The present invention relates generally to implant systems used in orthopedic surgery, for example to replace articular surfaces such as shoulder prostheses, and more particularly, but not exclusively, to a glenoid implant system for the shoulder having a reinforcement device for providing stability to a glenoid baseplate when implanted in a glenoid defect, and a method of use thereof. [Background technology]

[0003] During orthopedic surgery, surgeons may encounter defects in the bone they are operating on. For example, surgeons may encounter bone defects such as voids or glenoid defects in various regions of the glenoid during anatomic or reverse glenoid formation. Even after reaming preparation, defects may exist under the underside of the base plate of the orthopedic glenoid implant. Without proper support, this can lead to loosening and failure of the implant.

[0004] If the surgeon wishes to complete the back support of the baseplate, deeper reaming may continue until 100% back coverage is achieved (known as eccentric reaming). However, this often removes too much cortical bone (or cortical layer), the dense outer bone that forms a protective layer around the internal voids of the bone. Studies have shown that removal of cortical bone correlates with implant loosening over time.

[0005] There are various augmented glenoid base plates with predetermined shapes on the underside. The predetermined shapes are designed to fit more closely into various types of glenoid defects. However, these augmented base plates require extensive preparation of the glenoid to create the necessary angle and depth to accept the augmented base plate. In addition, instruments and augmented implants with various underside shapes must be brought into the operating room to cover every joint defect the surgeon may encounter. Furthermore, the surgeon cannot decide which augmented base plate to use until the patient's glenoid is exposed.

[0006] Patient-specific baseplates with a back surface shape that matches the anatomy of the patient's glenoid often require less preparation than preformed reinforced baseplates. However, to fabricate such patient-specific baseplates, a computed tomography (CT) scan is required to determine the shape of the customized baseplate. This can significantly increase the time and cost of the surgical procedure compared to traditional shoulder arthroplasty. Additionally, custom devices are expensive and require increased investment of time and resources on behalf of the company that supplies the device. Summary of the Invention [Problem to be solved by the invention]

[0007] Thus, there is a need for a baseplate design and procedure that can provide modular stability to the baseplate when there is a bone defect without excessive bone resection. Additionally, there is a need for a baseplate design and procedure that can provide such stability across a variety of defects using the same standard baseplate. Furthermore, there is a need to ensure stability without having to fabricate a custom-made baseplate for the patient's bone defect. [Means for solving the problem]

[0008] Aspects of the invention provide an implant system with a reinforcement device for replacing a glenoid surface of a joint, such as a shoulder prosthesis. The reinforcement device is used to provide stability to a base plate of the implant system when the base plate is placed adjacent a defect, such as a void, in a bone. The invention also provides a method for using the implant system.

[0009] In one aspect, an implant system is provided that includes a base plate having at least one through hole. A central screw extends from a lower surface of the base plate and is operable to secure the base plate to a bone. At least one reinforcing device is operable to extend through the at least one through hole. The reinforcing device includes a post having a first end, a second end, and a length dimensioned to allow the reinforcing device to traverse a bone defect when the base plate is secured to the bone. A fastener is disposed at the first end of the post. The fastener is operable to fasten to the base plate. A foot is located at the second end of the post. The foot is operable to abut a surface of the bone within the defect when the fastener is fastened to the base plate.

[0010] In another aspect, provided herein is an implant system including a base plate having a plurality of threaded peripheral holes circumferentially disposed about a central region of the base plate. A central screw extends from a lower surface of the base plate and is operable to screw-secure the base plate to bone. At least one reinforcement device is operable to extend through a first peripheral hole of the plurality of peripheral holes. The reinforcement device includes a post having a first end, a second end, and a length dimensioned to allow the reinforcement device to traverse a bone defect when the base plate is secured to the bone. A threaded fastener of the reinforcement device is disposed on the first end of the post. The fastener has threads configured to engage with the threads of the first peripheral hole. A leg of the reinforcement device is located at the second end of the post and is operable to abut a surface of the bone within the defect when the fastener is fastened to the base plate.

[0011] In another aspect, provided herein is a reinforcement device for an implant system having a base plate operable to be secured to a bone. The reinforcement device includes a post operable to extend through a through hole in the base plate. The post has a first end, a second end, and a length dimensioned to allow the reinforcement device to traverse a bone defect when the base plate is secured to the bone. A fastener is disposed at the first end of the post. The fastener is operable to fasten to the base plate. A foot is located at the second end of the post. The foot is operable to abut a surface of the bone in the defect when the fastener is fastened to the base plate.

[0012] In another aspect, provided herein is a method of surgically embedding an orthopedic implant in a bone. The method includes surgically exposing a surface of the bone. A circular surface is reamed into a portion of the bone. The portion of the bone is drilled with a central bore hole. The central bore hole and the circular surface are concentric. A through hole in a base plate of the implant system is oriented above a defect in the bone. The base plate is press fit into the central bore hole and inserted into the central bore hole such that the through hole is located above the defect. A reinforcing device extends through the through hole. The reinforcing device is fastened to the base plate such that the legs of the reinforcing device abut and do not penetrate the surface of the bone in the defect.

[0013] These and other objects, features and advantages of the present invention will become apparent from the following detailed description of various embodiments of the invention taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0014] The accompanying drawings, which constitute and are incorporated into this specification, illustrate embodiments of the present invention and, together with the detailed description herein, serve to explain the principles of the present invention. The drawings are only for the purpose of illustrating preferred embodiments and are not to be construed as limiting the present invention. It is emphasized that, in accordance with standard industry practice, various features are not drawn to scale. In fact, dimensions of various features may be arbitrarily increased or decreased for clarity of illustration. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0015] [Figure 1] FIG. 1 is a side perspective view of a defective glenoid cavity of a scapula according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a side perspective view of an orthopedic implant system according to one embodiment of the present invention. [Diagram 3] FIG. 3 illustrates an exploded side view of the orthopedic implant system of FIG. 2 according to one embodiment of the present invention. [Figure 4] 4 is a top perspective view of a base plate of the orthopedic implant system of FIG. 2 according to one embodiment of the present invention. [Diagram 5] FIG. 5 is a bottom perspective view of the base plate of FIG. 2 according to one embodiment of the present invention. [Figure 6] FIG. 6 is a side perspective view of a central screw of the orthopedic implant system of FIG. 2 according to one embodiment of the present invention. [Figure 7] FIG. 7 is a side perspective view of a connecting member of the orthopedic implant system of FIG. 2 according to one embodiment of the present invention. [Figure 8] FIG. 8 is a top perspective view of an embodiment of a reinforcement device for the orthopedic implant system of FIG. 2 having flat bottom legs, according to an aspect of the present invention. [Figure 9] FIG. 9 is a side view of the reinforcement device of FIG. 8 according to one embodiment of the present invention. [Figure 10] FIG. 10 is a side perspective view of another embodiment of a reinforcement device having arched bottom legs in accordance with an aspect of the present invention. [Figure 11] FIG. 11 is a side perspective view of another embodiment of a reinforcement device having a cone-bottom leg, according to an aspect of the present invention. [Figure 12] FIG. 12 is a side perspective view of another embodiment of a reinforcement device having threaded bottom legs in accordance with an aspect of the present invention. [Figure 13] FIG. 13 is a block diagram of a method of surgically preparing a bone to receive an orthopaedic implant system, according to one embodiment of the present invention. [Figure 14] FIG. 14 is a bottom perspective view of a bone reamer used to receive an orthopaedic implant system, according to one embodiment of the present invention. [Figure 15] 15 is a top perspective view of a defective glenoid cavity with the superior surface of the glenoid cavity prepared to receive the orthopedic implant system of FIG. 2 according to one embodiment of the present invention. [Figure 16] FIG. 16 is a side perspective view of the defective glenoid of FIG. 15 according to one embodiment of the present invention. [Figure 17] 17 is a side perspective view of a base plate of an orthopedic implant system being inserted into the prepared glenoid cavity of FIG. 15 along with an insertion tool, according to one embodiment of the present invention. [Figure 18] 18 is a side perspective view of the orthopedic implant system of FIG. 2 implanted within the glenoid cavity of FIG. 17 according to one embodiment of the present invention. [Figure 19] FIG. 19 is a top perspective view of the orthopedic implant system of FIG. 2 having a glenosphere disposed on a base plate for use in reverse shoulder glenoplasty according to one embodiment of the present invention. [Figure 20] FIG. 20 is a bottom perspective view of the orthopedic implant system of FIG. 19, according to one embodiment of the present invention. [Figure 21] FIG. 21 is a side perspective view of the orthopaedic implant system of FIG. 2 having a glenoid positioned on a baseplate for use in an anatomical shoulder glenoid formation, according to one embodiment of the present invention. [Figure 22]FIG. 22 is a side perspective view of another example of an orthopedic implant system, according to an embodiment of the present invention. [Figure 23] FIG. 23 is a side exploded view of the orthopedic implant system of FIG. 22, according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Generally speaking, this specification discloses an implant system and a method for its manufacture. Additionally, a surgical method for using the implant system is described.

[0017] In this detailed description and in the claims that follow, the terms proximal, distal, anterior, posterior, medial, lateral, superior, and inferior are defined by standard usage of those terms to indicate specific portions of a bone or implant according to the relative location of natural bone or directional terms of reference. For example, "proximal" refers to the portion of the device or implant closest to the torso, while "distal" refers to the portion of the device or implant furthest from the torso. With respect to directional terms, "anterior" refers to a direction toward the front of the body, "posterior" refers to a direction toward the back of the body, "medial" refers to a direction toward the midline of the body, "lateral" refers to a direction toward the side of the body or away from the midline of the body, "superior" refers to a direction above another object or structure, and "lower" refers to a direction below another object or structure.

[0018] As used herein, the terms "exemplary" or "exemplary" serve as an example, instance, or illustration. Any embodiment described herein as "exemplary" or "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Also, in this description, terms such as "top," "bottom," "left," "rear," "right," "front," "vertical," "horizontal," and similar terms refer to the invention directed to the first view of each embodiment.

[0019] Similarly, a location or orientation may be used herein with reference to an anatomical structure or surface. For example, since the present implant system (or implants), devices, systems, and methods are described herein with respect to use with the bones of the shoulder, the bones of the shoulder and upper arm may be used to describe the surface, location, direction, or orientation of the implant system, device, system, and method. Furthermore, the implant system, device, system, and method disclosed herein, as well as their aspects, components, features, etc., are described with respect to one side of the body for brevity. However, since the human body is relatively symmetrical or mirror image around a line of symmetry (midline), it is expressly expected that the implant system, device, system, and method described and / or illustrated herein, as well as their aspects, components, features, etc., may be modified for use with or in association with another side of the body for the same or similar purposes without departing from the spirit and scope of the present invention. Altered, modified, reconfigured, or otherwise altered for use with or in association with another side of the body for the same or similar purposes without departing from the spirit and scope of the present invention. For example, the implant systems, devices, systems and methods, and aspects, components, features, etc., described herein with respect to a right shoulder may be mirrored such that they function similarly with a left shoulder, and vice versa. Additionally, while the implant systems, devices, systems and methods, and aspects, components, features, etc., disclosed herein are described with respect to the shoulder for purposes of brevity, it should be understood that the implant systems, devices, systems and methods may be used with other bones of the body having similar structures, such as, for example, the lower extremities, and more specifically, the ankle, foot and foot bones.

[0020] Referring to the drawings, like reference numbers are used to indicate like or similar components throughout the several views. In particular, FIG. 1 illustrates an example of a defective voided glenoid cavity. FIGS. 2-12 illustrate various views of an implant system according to an aspect of the present invention. Additionally, FIGS. 13-18 illustrate various steps and apparatus utilized in a method of preparing bone for an orthopaedic implant system according to an aspect of the present invention. FIGS. 22 and 23 illustrate various views of another example embodiment of an implant system, in which the base plate and central screw of the implant system are formed as a single integral construct.

[0021] 1, an example of a side perspective view of a defective glenoid 12 of a scapula 10 is shown in accordance with an embodiment of the present invention. The glenoid 12 includes at least one bone defect 14 that has developed in a patient over time. For example, the bone defect 14 may be, but is not limited to, a void. The defect consists of a depression beyond the normal anatomy of the glenoid.

[0022] The example of a defective scapula 10 shown in Figure 1 shows one defect 14, although two or more defects are possible. Such defects may vary in depth and size depending on the condition occurring. Additionally, although the figures herein show a glenoid 12 with a defect, other bones in the human anatomy may have similar defects treatable within the scope of the present invention.

[0023] Such defects provide an irregular surface to the glenoid 12, thereby reducing structural support to the backside of the baseplate of the orthopedic implant system (or implant), even after reaming the articular surface of the glenoid. If the surgeon wishes to achieve backside support of the baseplate, he or she must continue reaming deeper until 100% backside coverage is achieved (known as eccentric reaming). However, this often results in excessive removal of the cortical layer. Studies have shown that removal of the cortical layer correlates with implant loosening over time. The cortical layer (or cortical bone) in this context is the dense outer surface of bone that forms a protective layer around the internal voids of the bone.

[0024] 2 and 3, there is shown a side perspective view (FIG. 2) and an exploded view (FIG. 3) of an orthopedic implant system 100, according to one aspect of the present invention. The implant system 100 includes a base plate 102, a central screw 104, a connecting member 106, and at least one reinforcement device 200, and the implant system 100 may include one or more peripheral screws 154 (shown in FIGS. 19 and 20). Additionally, the implant system may include a glenosphere 150 (shown in FIGS. 19 and 20) for use in a reverse shoulder arthroplasty and / or a glenoid liner 160 (shown in FIG. 21) for use in an anatomical shoulder arthroplasty.

[0025] In the example of the implant system 100 shown in Figures 2 and 3, the base plate 102, the central screw 104, and the connecting member 106 are separate pieces. Additionally, while the central screw 104 is separable from the base plate 102 and operable to extend through a central bore 114 (see Figure 4) located in a central region 115 of the base plate 102, another example of an implant system 400 within the scope of the present invention is shown in Figures 22 and 23. In the implant system 400, the base plate 402, the central screw 404, and the connecting member 406 may be integrally connected as a single, integral construct.

[0026] As described in more detail herein, the reinforcement device 200 provides stability to the implant system 100 when the implant system is inserted into a glenoid 324 having a bone defect 328, such as a void (see FIG. 18 ). The reinforcement device 200 can be fastened to the base plate 102 and extend into the bone defect 14 such that the leg ends of the reinforcement device abut the surface of the bone in the defect 14, which may include hard bone, e.g., cortical bone. The reinforcement device 200 can provide support to the base plate 102, like the legs of a table, providing support for the table with minimal bone removal from the surface of the bone in the defect 14.

[0027] 4 and 5, there are shown top (FIG. 4) and bottom (FIG. 5) perspective views of the base plate 102 of the implant system 100, according to one embodiment of the present invention. The base plate 102 may be cylindrical, for example, having a circular top surface 110 and a circular bottom surface 112.

[0028] The base plate 102 may include a threaded central bore 114 disposed or positioned in a central region 115 of the base plate 102. The base plate 102 also includes at least one through hole. In this particular example, the base plate 102 includes two types of through holes: a plurality of threaded peripheral holes 118 and a plurality of arcuate slots 120. Both the plurality of peripheral holes 118 and the plurality of arcuate slots 120 are disposed circumferentially around the central bore 114 and / or central region 115 of the base plate.

[0029] Only two types of through holes are illustrated herein (i.e., peripheral holes 118 and arcuate slots 120), and other types of through holes are within the scope of the present invention. For example, the through holes may be one or more unthreaded holes or straight slots drilled through the base plate 102.

[0030] The plurality of threaded peripheral holes 118 are configured to engage with peripheral screws 154 (see FIGS. 19 and 20). During surgery, at least one peripheral screw 154 extends through any one of the plurality of peripheral holes 118 to further secure the base plate 102 to the bone. As shown in FIG. 20, the peripheral screw 154 includes a first thread 156 and a second thread 158. The first thread 156 is configured to engage with the threads of any one of the plurality of peripheral holes 118. The second thread 158 is configured to screw into the bone and aid in securing the base plate 102 to the bone.

[0031] 5 illustrates a base plate 102 having a plurality of arcuate projections 122 extending from the bottom surface 112 of the base plate 102 and circumferentially disposed about the central bore 114. The projections 122 are comprised of a porous metal structure and, when inserted into a prepared void glenoid cavity, provide a site for bone ingrowth.

[0032] 5, a plurality of arcuate slots 120 may be disposed adjacent to the inner and outer sidewalls of the projection 122 and may follow the shape of the projection 122. The arcuate slots 120 may potentially be utilized to modify the implant system 100 as needed. For example, the arcuate slots 120 may allow surgical instruments, such as bone grafts, to be passed down through the slots 120 to disengage metal from the bone grafts so that the implant system 100 can be removed during a revision surgery.

[0033] 6, a side perspective view of the central screw 104 of the orthopaedic implant system 100 is shown, according to one aspect of the present invention. The central screw 104 extends through the central bore 114 and is operable to screw-secure the base plate 102 to bone (see FIG. 18). In this example, the bone that the central screw 104 engages engages the glenoid cavity of the scapula (see FIG. 18).

[0034] 6, the central screw 104 may include a proximal unthreaded portion 124 and a distal threaded portion 126. The proximal portion 124 may include a flared head portion 128 located at a first end 130 of the central screw 104. The proximal portion 124 may include a recess 132 extending into the proximal portion 124 from the first end 130 of the central screw 104.

[0035] FIG. 6 illustrates that the recess 132 may include a first socket 134 and a second female threaded portion 136. The first socket 134 may extend from the first end 130 of the central screw 104 toward the second female threaded portion 136. The second female threaded portion 136 may extend from a lower end of the first socket 134 toward the distal threaded portion 126. The first socket 134 may be, for example, a drive feature for engaging a tool to insert and remove the central screw 104. The second female threaded portion 136 may be, for example, threaded to receive corresponding threads of the post 152 (see FIG. 19). The proximal portion 124 may have, for example, a texture or coating to provide porous fixation. The proximal portion 124 may be, for example, configured or dimensioned to conserve bone. The distal threaded portion 126 may be, for example, threaded to engage a patient's bone, for example, the glenoid 12, to secure the base plate 102 to the patient's bone.

[0036] 7, a side perspective view of the connecting member 106 of the orthopaedic implant system 100 is shown, in accordance with one aspect of the present invention. The connecting member 106 engages the base plate 102 via a threaded portion 138 to secure the central screw 104 within the central bore 114 of the base plate 102.

[0037] 7 illustrates a connecting member 106 including a distal male threaded portion 138 terminating at a lower end 140 of the connecting member 106, the connecting member 106 including a proximal threaded portion 142 having a central through hole 144 extending through the connecting member 106 from an upper end 146 to the lower end 140, the central through hole 144 may include a socket portion 148 extending from the apical end 148 through at least a portion of the central through hole 144. The socket portion 148 may be, for example, a drive mechanism for engaging a tool within the central bore 114 of the base plate 102 to insert or remove the connecting member 106, the male threaded portion 138 may be, for example, threaded to receive corresponding female threads within the central bore 114. When threaded into the central bore 114, the lower end 140 of the connecting member 106 may abut the flared head portion 128 of the central screw 104 to securely lock the central screw 104 in place.

[0038] 8 and 9, there are shown a top perspective view (FIG. 8) and a side view (FIG. 9) of a first embodiment of a reinforcement device 200 of an orthopaedic implant system 100 in accordance with one aspect of the present invention. The reinforcement device 200 comprises a fastener portion 202 and a leg portion 204 connected by a post 206.

[0039] The reinforcement device 200 is operable to extend through at least one through hole 118 of the base plate 102. In the examples shown herein, the reinforcement device 200 is configured to extend through any one of the peripheral holes 118. However, the reinforcement device 200 may also be configured to extend through any one of the arcuate slots 120. Additionally, the reinforcement device 200 may be configured to extend through any other type of through hole disposed within the base plate 102.

[0040] As shown in FIG. 8, the post 206 includes a first end 208, a second end 210, and a length 212 sized to allow the reinforcement device 200 to traverse or fill a defect in a bone. For example, the length 212 of the post 206 may be long enough when the reinforcement device 200 is fastened to the base plate 102 and secured within the scapula 10. The reinforcement device 200 may extend into the defect 14 of the glenoid 12 to abut the legs 204 against a bottom surface of the bone within the defect 14 (see FIG. 18) and provide support to the base plate 102. The post 206 may include a porous surface to provide a site for bone ingrowth when inserted into a prepared glenoid cavity. The porous surface may be comprised of, for example, a porous metal structure, or a porous coating. Although the post 206 is illustrated in FIGS. 8 and 9 as being cylindrical, the post 206 may be comprised of other shapes. For example, but not by way of limitation, the post 206 may have a square or rectangular cross-sectional shape. Alternatively, the post 206 may have a shape that matches the shape of the through-hole through which it extends.

[0041] FIG. 8 also shows the fastener 202 disposed on the first end 208 of the post 206. The fastener 202 couples the reinforcement device 200 to the base plate 102. For example, the fastener 202 may include external threads 214 configured to engage with internal threads in any one of the peripheral holes 118 of the base plate 102. However, the fastener may be configured to engage with any of the plurality of arcuate slots 120. For example, the first arcuate slot 120 may have a portion of the internal threads 214 disposed on an opposing side wall of the first arcuate slot 120 that engages with the external threads disposed on the fastener 202. The fastener 202 may also be configured to engage with other through holes disposed in the base plate 102. Additionally, the fastener 202 may not include threads and may be configured to be press-fit or bonded into a through hole.

[0042] The fastener 202 may include various components that are resilient, i.e., spring loaded, and capable of snapping and securing the stiffening device 200 when in place. For example, the fastener 202 may include an upper rim disposed at the upper end 218 of the fastener 202 and a well-known spring-loaded retractable retaining ring (or snap ring) disposed in a groove on the lower end of the fastener 202 adjacent the upper first end 208 of the post 206. The retaining ring (not shown) may retract radially into the groove when inserted through the top of the through hole and snap partially radially back out of the groove when exiting the bottom of the through hole. The retaining ring and upper rim may be spaced apart to capture the base plate therebetween and are configured to hold the stiffening device 200 in place when the stiffening device 200 is extended through the through hole.

[0043] The socket 216 may be recessed into the top end 218 of the fastener 202. The socket 216 may be a drive mechanism for engaging a tool, for example, for inserting or removing the reinforcement device 200. In this particular example, the tool may engage the socket 216 to thread the male threads 214 of the fastener 202 into the female threads of any of the peripheral holes 118 of the base plate 102.

[0044] The legs 204 are located on the second end 210 of the post 206. The legs 204 are operable to abut the surface of the bone in the defect 14 when the fastener 202 is fastened to the base plate 102. In the example shown in Figures 8 and 9, the legs 204 have flat bottom legs, i.e., the legs 204 are flat surfaces at the bottom second end 210 of the post 206. The flat bottom legs 204 are operable to press against and not penetrate the surface of the bone in the defect 14.

[0045] As described in more detail herein, the flat surface 344 may be reamed into a portion of the bone surface within the defect 14 directly below the through-hole into which the reinforcement device 200 is inserted. The flat surface 344 abuts the flat bottom leg 204 of the reinforcement device 200 to support the leg 204 along substantially the entire surface area of ​​the flat bottom leg 204 and the base plate 102.

[0046] 10 illustrates a side perspective view of another example of a reinforcement device 220 having an arched bottom leg 222 in accordance with an embodiment of the present invention. The fasteners 202 and posts 206 of the reinforcement device 220 are configured as described above with reference to the reinforcement device 200 and will not be described again here for the sake of brevity.

[0047] The legs 222 are formed in an arched or curved shape. The legs 222 are configured to press against but not penetrate the bone surface within the defect 14. The arched bottom legs 222 can abut a smaller percentage of the surface area against the bone within the defect 14 than the flat bottom legs 204. In this manner, less reaming is required, less bone removal is required, and the bone surface within the defect 14 can be prepared to receive and support the arched bottom legs 222, relative to the flat bottom legs 204.

[0048] 11 is a side perspective view of another example of a reinforcement device 224 having a cone-bottom leg 226 according to one embodiment of the present invention. The fastener 202 and post 206 of the reinforcement device 224 are configured as described above with reference to the reinforcement device 200 and will not be described again here. The leg 226 has a cone shape and presses back against the bone surface in the defect 14. The cone-bottom leg 226 can abut the bone in the defect 14 with a smaller percentage of its surface area than the flat-bottom leg 204. In this manner, less reaming or bone removal is required relative to the flat-bottom leg 204 and the bone surface in the defect 14 can be prepared.

[0049] 12 shows a side perspective view of another example of a reinforcement device 228 having a threaded bottom leg 230 according to one embodiment of the present invention. The fastener 202 and post 206 of the reinforcement device 228 are configured as described above with reference to the reinforcement device 200 and will not be described again here for brevity. The threaded bottom leg 230 of the reinforcement device 228 includes threads 232 designed to minimally penetrate the bone within the defect 14. For example, the reinforcement device 228 includes at least one thread 232 and has a thread major diameter 234 that is equal to or smaller than the major diameter 236 of the second end 210 of the post 206. Furthermore, the threaded bottom leg 230 may include a limited number of threads, for example, three or more threads 232, to limit penetration into the surface of the bone within the defect 14. The threaded bottom leg 230 is operable to be screwed into the surface of the bone within the defect 14.

[0050] 13-18, various steps utilized in a method of preparing a bone for an orthopaedic implant system 100 are shown in accordance with an embodiment of the present invention. In this particular case, the method is used to implant an orthopaedic implant system 100 into the glenoid cavity 12 of the scapula 10. However, the method may be used to implant other orthopaedic implant systems within the scope of the present invention into other bones. Specifically, FIG. 13 illustrates a block diagram of a method of surgically preparing a bone to receive an orthopaedic implant system in accordance with the present invention, and FIGS. 14-21 supplement the various steps of the method of the present invention.

[0051] 14, there is shown a bottom perspective view of a bone reamer 320 used to prepare an upper (or outer) surface 322 of a glenoid 324 having a void-like bone defect 328 for receiving an orthopaedic implant system 100, according to one embodiment of the present invention. A similar such bone reamer is disclosed in International Patent Application No. PCT / US2019 / 051322, filed September 16, 2019, which is incorporated herein by reference in its entirety.

[0052] 15 and 16, there are shown top (FIG. 15) and side (FIG. 16) perspective views of a defective glenoid 324, according to one embodiment of the present invention. In FIGS. 15 and 16, an outer surface 322 of the glenoid 324 has been prepared to receive an orthopaedic implant system 100 having a bone reamer 320.

[0053] After surgically exposing the outer surface 322 of the joint cavity 324 of a patient (see 300 in FIG. 13 ), a bone reamer 320 may be used to remove the outer surface 322 of the joint cavity 324 (see 302 in FIG. 13 ) into a portion of a circular surface 330. Reaming of the portion of the circular surface 330 may be performed by a blade member 332 of the bone reamer 320. The portion of the circular surface 330 may or may not be a complete circular surface due to bone loss caused by a bone defect 328.

[0054] Additionally, the bone reamer 320 can be used to drill a central bore hole 334 concentric with a portion of the circular surface 330 (see item 304 in FIG. 13 ) into the glenoid cavity 324. The central bore hole 334 can be drilled with a central drill bit 336 of the bone reamer 320.

[0055] The bone reamer 320 may cut a portion of a circular groove 338 concentric with the central bore hole 334 (see item 306 in FIG. 13 ) into the glenoid bone 324. The cutting of the portion of the circular groove 338 may be performed with a number of cutting pegs 340 on the bone reamer 320. The portion of the circular groove 338 may or may not be a full 360 degree circular groove due to existing bone loss.

[0056] The bone reamer 320 can ream a portion of the circular surface 330, drill the central bore hole 334, and cut a portion of the circular groove 338 substantially simultaneously. However, the portions of the circular surface 330, the central bore hole 334, and the portion of the circular groove 338 can be machined into the glenoid 324 using any number of instruments and in any order.

[0057] 17 illustrates a side perspective view of the base plate 102 of the orthopaedic implant system 100 with an illustrated insertion tool 342 being inserted into the prepared glenoid 324, according to one embodiment of the present invention. The insertion tool 342 may be used to orient the through holes in the base plate 102 of the implant system 100 over the defect 328 in the glenoid bone 324 (see item 308 in FIG. 13 ).

[0058] Thereafter, an insertion tool 342 may be used to insert the base plate 102 into the central bore hole 334 and circular groove 338 such that the through hole of the base plate 102 is positioned directly over the defect 324 (see item 310 in FIG. 13 ). More specifically, the central bore 114 of the base plate 102 may be positioned by the insertion tool directly over the central bore hole 334 in the glenoid fossa 324, and the central screw 104 may be used to secure the base plate 102 to the glenoid fossa 324 of the scapula 326. The arcuate projection 122 of the base plate 102 may be press fit into the circular groove 338 to further secure the base plate 102 to the glenoid fossa 324. One or more peripheral screws 154 (see FIGS. 19 and 20 ) may then be used to further secure the base plate 102 to the glenoid fossa 324.

[0059] The flat surface 344 may then be reamed into a portion of the surface 346 of the glenoid bone 324 in the defect 328 immediately below the through hole (see item 312 in FIG. 13). Reaming may be accomplished with any one of several well known reaming tools.

[0060] Alternatively, reaming of surface 344 may not be required. This may be particularly the case if the reinforcement device 200 has an arched bottom leg 222, a conical bottom leg 226, or a threaded bottom leg 230.

[0061] 18 illustrates an orthopaedic implant system 100 implanted in a glenoid cavity 324 according to one embodiment of the present invention. The augmentation device 200 then extends through the through hole (see 314 in FIG. 13).

[0062] The reinforcement device 200 may be fastened to the base plate 102 such that the legs 204 of the reinforcement device 200 abut the surface 346 of the defect 328, and do not penetrate the surface 346 of the glenoid bone 324 (see FIG. 13, item 316). More specifically, in this case, the reinforcement device 200 may be secured to the base plate 102 by coupling the fasteners 202 to the peripheral through-holes 118 such that the legs 204 of the reinforcement device 200 abut against a flat surface 344 (see FIGS. 15 and 16) that is reamed into the surface 346 of the glenoid bone 324 in the defect 328.

[0063] Once implanted, the reinforcement device 200 supports the base plate 102 and allows for attachment to the glenoid cavity 324. The reinforcement device 200 minimizes the removal of superficial bone within the defect 328. Additionally, the reinforcement device 200 allows for the use of the same base plate 102 regardless of the bone defect. Once the base plate 102 is implanted, one or more reinforcement devices 200 can be inserted depending on the type and severity of the defect encountered.

[0064] 19 and 20, top (FIG. 19) and bottom (FIG. 20) perspective views of an orthopaedic implant system 100 are shown in accordance with one embodiment of the present invention. A glenosphere 150 can then be placed onto the base plate 102 of the implant system 100 for use in a reverse shoulder arthroplasty (see FIG. 13, item 318).

[0065] The glenosphere 150 may be coupled to the base plate 102 by a screw post 152 that extends through the connecting member 106 (see FIG. 7) and threads into the female threads 136 of the recess 132 of the central screw 104 (see FIG. 6). The central screw 104 and the peripheral screw 154 may be used to secure the implant system 100 to the scapula 326. The peripheral screw 154 may include a first thread 156 configured to engage the threads of the peripheral hole 118 and a second thread 158 configured to be threaded into the scapula 326. The reinforcement device 200 may support the base plate 102 when implanted in the scapula 326.

[0066] 21, a top perspective view of an orthopaedic implant system according to one embodiment of the present invention is depicted. The glenoid liner 160 may be connected to the base plate 100 rather than the glenosphere 150 (see FIG. 13, item 318) as shown. The glenoid liner 160 may be for use in anatomic shoulder arthroplasty.

[0067] The glenoid liner 160 may be coupled to the base plate 102 using a number of different attachment techniques (not shown). For example, the glenoid liner 160 may have a protrusion that fits into the arcuate slot 120 of the base plate 102 such that the protrusion is press fit into the slot 120. Alternatively, the glenoid liner 160 may have a flanged end that extends radially inward. The flanged end may be cupped under the bottom surface 112 of the base plate 102 and may secure the liner 160 to the base plate 102. To accommodate the glenoid liner 160, the connecting member 106 may be reduced in height so that when the connecting member 106 is attached to the base plate 102, its upper surface is flush or nearly flush with the upper surface 110 of the base plate.

[0068] 22 and 23, there are shown a side perspective view (FIG. 22) and a side exploded view (FIG. 23) of another example of an orthopedic implant system 400 according to the present invention. In contrast to the implant system 100, the base plate 402, the central screw 404 and the connecting member 406 are integrally connected as a single, one-piece construction. In this implant system 400, there is no central bore 114 (see FIG. 4) located in the central region 115 of the base plate 102 to which both the central screw 104 and the connecting member 106 can be removably connected. Rather, in the implant system 400, the central screw 404 extends from the underside 410 of the central region 415 of the base plate 402, and the connecting member 406 extends from the upper side 408 of the central region 415 of the base plate 402. The base plate 402, the central screw 404 and the connecting member 406 can be cast and / or machined from a single block of material. All other aspects of implant system 100 and implant system 400 (including reinforcement devices such as reinforcement device 200) are substantially similar.

[0069] As can be recognized by those skilled in the art based on the teachings herein, numerous changes and modifications can be made to the above and other embodiments of the present disclosure without departing from the scope of the present disclosure. Components of the implant system, device, and / or system disclosed herein, including the accompanying abstract and drawings, may be replaced by alternative components or features, such as those disclosed in another embodiment, to provide a similar function for the intended purpose, providing the same, identical or similar purpose as known by those skilled in the art to achieve the same, equivalent or similar result by such alternative components or features. Furthermore, the implant system, device, and / or system may include more or fewer components or features than the embodiments described and illustrated herein. For example, the components and features of the implant system 100 may be used interchangeably and in alternative combinations, as modified or changed by those skilled in the art. Furthermore, the steps of the surgical method associated with the implant system 100 may be used interchangeably and in alternative combinations, as modified or changed by those skilled in the art. Thus, this detailed description of the presently preferred embodiments should be interpreted as illustrative, as opposed to restrictive, of the present disclosure.

[0070] The terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the invention. As used herein, the singular forms "a," "an," and "the" are intended to include the plural unless the context clearly indicates otherwise. Additionally, the terms "comprise" (and any form of "comprise," such as "comprising"), "have" (and any form of "have," such as "having"), and "comprise" (and any form of "comprise," such as "comprising") are open-ended linking verbs. As a result, a method or device that "comprises," "has," "comprises," or "includes" one or more steps or components possesses those one or more steps or components, but is not limited to possessing only those one or more steps or components. Similarly, a method step or device component that "comprises," "has," "comprises," or "includes" one or more features possesses those one or more features, but is not limited to possessing only one of them. Additionally, a device or structure that is configured in a particular way may be configured in at least that way, but not in a way that is not described.

[0071] The present invention has been described with reference to preferred embodiments. It is understood that the available embodiments described herein are illustrative of multiple possible configurations for providing the same general features, characteristics, and general system operation. Modifications and alterations will occur to others upon reading and understanding the above detailed description. It is intended that the present invention be construed as including all such modifications and alterations.

Claims

1. a base plate having at least one through hole; a central screw extending from a lower surface of the base plate and operable to screw the base plate to a bone; at least one reinforcing device extending through at least one of the through holes, a post having a first end, a second end, and a length that allows the reinforcement device to extend into the bone defect when the base plate is secured to the bone; a fastener disposed at the first end of the post for coupling the at least one stiffening device to the base plate; a leg disposed at the second end of the post that presses against a bone surface in the defect when the fastener is coupled to the base plate; and The reinforcing device comprising: Including, a central bore disposed in the base plate; the central screw extends through the central bore; the base plate has a plurality of arcuate projections extending from the lower surface of the base plate, the plurality of arcuate projections being circumferentially disposed about the central bore, the plurality of arcuate projections being comprised of a porous metal structure; The base plate includes a plurality of first arcuate slots disposed in the circumferential direction around the central bore closer to the central bore than the plurality of arcuate protrusions, and a plurality of second arcuate slots disposed in the circumferential direction around the central bore farther from the central bore than the plurality of arcuate protrusions.

2. The implant system of claim 1 , wherein the legs of the reinforcement device include a conical base, the legs being operable to press against the bone surface within the defect.

3. the legs of the reinforcement device include a threaded bottom leg having at least one thread; At least one of the threads has a major thread diameter that is smaller than an major diameter of the second end of the post; The implant system of claim 1 , wherein the threaded bottom foot is configured to threadably engage the bone surface within the defect.

4. the base plate includes a plurality of threaded peripheral holes disposed in the circumferential direction about the central bore; The implant system of claim 1 , further comprising a threaded fastener having threads configured to engage threads of a first peripheral hole of the plurality of peripheral holes.

5. at least one peripheral screw operable to extend through any one of said plurality of peripheral holes; At least one of the peripheral screws includes: a first thread configured to engage the thread of a second peripheral hole of the plurality of peripheral holes; and a second thread configured to threadably engage the bone; The implant system of claim 4 , comprising:

6. The implant system of claim 1 , further comprising a first fastener configured to engage one of the first plurality of arcuate slots.

7. the one of the plurality of first arcuate slots having a female threaded portion disposed on a sidewall of the one of the plurality of first arcuate slots; 7. The implant system of claim 6, wherein the first fastener portion includes male threads configured to engage with a female-threaded portion of the one of the first plurality of arcuate slots.

8. The implant system of claim 1 , further comprising one of a glenosphere and a glenoid liner operable to be attached to the base plate after the base plate is secured to the bone.

9. a base plate having a plurality of peripheral threaded holes circumferentially disposed about a central region of the base plate; a central screw operable to extend from a lower surface of the base plate and operable to threadably engage the base plate to a bone; at least one reinforcing device operable to extend through a first peripheral hole of the plurality of threaded peripheral holes, a post having a first end, a second end, and a length that the reinforcement device extends into the bone defect when the base plate is secured to the bone; a threaded fastener disposed at the first end of the post, the fastener having threads configured to engage the threads of the first peripheral hole; a leg at the second end of the post operable to abut the bone in the defect; and Equipped with a central bore disposed in the base plate; the central screw extends through the central bore; the base plate has a plurality of arcuate projections extending from the lower surface of the base plate, the plurality of arcuate projections being circumferentially disposed about the central bore, the plurality of arcuate projections being comprised of a porous metal structure; The base plate includes a plurality of first arcuate slots disposed in the circumferential direction around the central bore closer to the central bore than the plurality of arcuate protrusions, and a plurality of second arcuate slots disposed in the circumferential direction around the central bore farther from the central bore than the plurality of arcuate protrusions.

10. The implant system of claim 9 , wherein the central screw is separable from the base plate.

11. 10. The implant system of claim 9, wherein the legs of the reinforcement device include a conical base, the legs configured to press against and engage the bone within the defect.

12. the legs of the reinforcement device include a threaded bottom leg; the threaded bottom leg having at least one of the threads; At least one of the threads has a major thread diameter that is smaller than an major diameter of the second end of the post; The implant system of claim 9 , wherein the threaded bottom leg is threadably engageable with a surface of the bone within the defect.

13. at least one peripheral screw operable to extend through any one of said plurality of peripheral holes; At least one of the peripheral screws includes: a first thread configured to engage the thread of a second peripheral hole of the plurality of peripheral holes; and a second thread configured to threadably engage the bone; and The implant system of claim 9 , comprising:

14. at least one of a glenosphere and a glenoid liner; The implant system of claim 9 , wherein the base plate is connected to the base plate after the base plate is fixed to the bone.

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