Implants, systems and methods of using same

Abstract

To provide glenoid implants for anatomic shoulder arthroplasties, and methods for using the glenoid implants.SOLUTION: A glenoid implant comprises: a baseplate 110; a central screw 130 extending through a central bore 116 of the baseplate; and a coupling member 160 engaging a portion of the central bore of the baseplate.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The claims of this application claim priority under 35 U.S.C. §119(e) to U.S. Provisional Application No. 62 / 711,449, filed July 27, 2018, which is incorporated herein by reference in its entirety.

[0002] The present invention relates generally to general surgical, orthopedic implants used to replace the articular surfaces of joints, e.g., shoulder prostheses. More specifically, but not exclusively, the present invention relates to glenoid implants for anatomical shoulder arthritis, as well as methods for their use. [Background technology]

[0003] Shoulder replacement is a surgical procedure in which all or part of the glenohumeral joint is replaced with a prosthetic implant. Such joint replacements are typically performed to relieve arthritis pain or repair severe joint damage.

[0004] Shoulder replacement surgery is an option for the treatment of severe arthritis of the shoulder joint. Arthritis is a condition that affects the cartilage of the joint. As the cartilage layer wears away, the protective layer between the bones is lost. When this happens, painful bone-to-bone arthritis develops. Severe shoulder arthritis can be very painful and cause limited movement. This can be tolerated with medication and lifestyle adjustments, but there may come a time when surgical treatment is necessary. Summary of the Invention [Problem to be solved by the invention]

[0005] There are several primary approaches to access the shoulder joint. The first is the deltopectoral approach, which preserves the deltoid but requires cutting the subscapularis. The second is the transdeltoid approach, which provides a straight approach at the glenoid fossa. However, during this approach, the deltoid is at risk of potential injury. [Means for solving the problem]

[0006] Shoulder arthroplasty, also known as shoulder arthroplasty or glenoid arthroplasty, was first developed in 1893 by French surgeon Jules-Emile Pine. His procedure consisted of physically lubricating the shoulder joint and implanting platinum and rubber materials. The next notable case in the advancement of shoulder arthroplasty was in 1995 when Charles Neal performed the first hemiarthroplasty, essentially replacing only the humeral head and leaving the natural shoulder socket or glenoid intact. Although this procedure gained exponential popularity over time, patients often developed cartilage loss even on the glenoid surface, causing pain and glenoid erosion. This prompted the development of procedures that replaced not only the humeral component but also the glenoid component.

[0007] Throughout the development of the procedure, it has become widely accepted that the rotator cuff muscles are essential to producing the best results in terms of strength, range of motion, and pain reduction. In addition to this discovery, the physical constraints of the shoulder's normal ball-and-socket anatomy have limited most developments in one way or another. For example, the severely restrictive system limited the range of motion, and the unique anatomy of the glenoid cavity made it difficult to anchor prostheses and fix components without fracturing them. These challenges and high failure rates led to the development of reverse total shoulder arthroplasty to overcome the limitations imposed by the natural shoulder anatomy.

[0008] During the 1970s there was an exponential increase in surgical approaches using this methodology, and the number and variations of surgical techniques are numerous. However, in 1985 Paul Grammont came along with a superior technique that is the basis for most reverse shoulder arthroplasties today.

[0009] In a conventional total shoulder arthroplasty, the approach begins with separating the deltoid muscle from the pectoralis muscle to facilitate access to the glenohumeral joint via a relatively nerve-free passageway. The shoulder joint is initially covered by the rotator cuff muscles (subscapularis, supraspinatus, infraspinatus, and teres minor) and the joint capsule (suprascapularis ligament). Typically, a single rotator cuff muscle is identified and cut to allow direct access to the shoulder joint. At this point, the surgeon can remove the arthritic portion of the joint and then fix a ball and socket prosthesis into the joint.

[0010] The development of safer and more effective techniques has led to the increased use of reverse total shoulder arthroplasty, which is usually indicated when the rotator cuff muscles are severely injured.

[0011] Many existing reverse shoulder systems require a base plate and a glenosphere. These systems generally differ in how the base plate is secured to the glenoid cavity and how the glenosphere engages with the base plate. In some systems, the base plate may be secured to the glenoid cavity of the scapula by multiple screws, and the glenosphere, which has a convex articular surface, may be screwed into the base plate using an axial thread feature and / or taper that is part of the base plate. In other systems, the glenosphere may engage with the base plate only via a taper connection.

[0012] If the glenosphere engages the base plate via either a threaded or tapered connection, the glenosphere and base plate may separate after a period of time, causing the glenosphere to tilt relative to and possibly move away from the base plate, either of which will result in a misalignment of the base plate and glenosphere.

[0013] Some systems involve first fixing a central screw to the glenosphere and then guiding the connection between the baseplate and the glenosphere via the central screw. The process of guiding the connection between the baseplate and the glenosphere is usually a major consideration due to the minimal access and visibility the surgeon may have during the reverse shoulder procedure. Access to the baseplate is generally narrow, making it relatively difficult for the surgeon to obtain the visibility required to properly adjust the engagement between the baseplate and the glenosphere.

[0014] What is needed in the art is a shoulder implant that improves on prior art devices by providing design advantages that result in less bone loss, improved bone graft retention, and greater initial and long-term implant fixation.

[0015] Aspects of the present disclosure provide a glenoid implant for anatomic shoulder arthroplasty. The present invention also provides a method for using the glenoid implant.

[0016] In one aspect, provided herein is an implant that includes a base plate, a central screw extending through a central bore of the base plate, and a coupling member that engages a portion of the central bore of the base plate.

[0017] In another aspect, provided herein is a surgical method for inserting an implant.

[0018] These and other objects, features and advantages of the present invention will become apparent from the following detailed description of various aspects of the invention taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0019] The accompanying drawings, which form a part of 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. [Figure 1] FIG. 1 is a first perspective view of an embodiment of a glenoid implant according to one aspect of the present disclosure. [Diagram 2] 2 is a second perspective view of the glenoid implant of FIG. 1 according to one embodiment of the present disclosure. [Diagram 3] 3 is a first side view of the glenoid implant of FIG. 1 according to one embodiment of the present disclosure. [Figure 4] 4 is a second side view of the glenoid implant of FIG. 1 according to one embodiment of the present disclosure. [Diagram 5] 5 is a top view of the glenoid implant of FIG. 1 according to one embodiment of the present disclosure. [Figure 6] FIG. 6 is a bottom view of the glenoid implant of FIG. 1 according to one embodiment of the present disclosure. [Figure 7] 7 is a first cross-sectional view of the glenoid implant of FIG. 1 taken along line 7-7 of FIG. 5 according to one embodiment of the present disclosure. [Figure 8] 8 is a second cross-sectional view of the glenoid implant of FIG. 1 taken along line 8-8 of FIG. 5 according to one embodiment of the present disclosure. [Figure 9] 9 is a first perspective exploded view of the glenoid implant of FIG. 1 according to one embodiment of the present disclosure. [Figure 10] FIG. 10 is an exploded second perspective view of the glenoid implant of FIG. 1 according to one embodiment of the present disclosure. [Figure 11] 11 is an exploded first side view of the glenoid implant of FIG. 1 in accordance with the present disclosure. [Figure 12] FIG. 12 is an exploded second side view of the glenoid implant of FIG. 1 according to one embodiment of the present disclosure. [Figure 13] FIG. 13 is a lateral view of the glenoid implant of FIG. 1 according to one embodiment of the present disclosure. [Figure 14] FIG. 14 is a medial view of the glenoid implant of FIG. 1 according to one embodiment of the present disclosure. [Figure 15] FIG. 15 is an exploded cross-sectional view of components of the glenoid implant of FIG. 1 according to one embodiment of the present disclosure. [Figure 16] FIG. 16 is a side assembly view of another glenoid implant according to one embodiment of the present disclosure. [Figure 17] FIG. 17 is another side view of the glenoid implant of FIG. 16 according to one embodiment of the present disclosure. [Figure 18] FIG. 18 is yet another side view of the glenoid implant of FIG. 16 according to one embodiment of the present disclosure. [Figure 19] FIG. 19 is a top perspective view of the glenoid implant of FIG. 16 according to one embodiment of the present disclosure. [Figure 20] FIG. 20 is a bottom perspective view of the glenoid implant of FIG. 16 according to one embodiment of the present disclosure. [Figure 21] FIG. 21 is a side cross-sectional view of the glenoid implant of FIG. 16 according to one embodiment of the present disclosure. [Figure 22] FIG. 22 is an exploded side view of the glenoid implant of FIG. 16 according to one embodiment of the present disclosure. [Figure 23] FIG. 23 is a top perspective view of a base plate of the glenoid implant of FIG. 16 according to one embodiment of the present disclosure. [Figure 24] FIG. 24 is a bottom view of the base plate of FIG. 23 according to one embodiment of the present disclosure. [Diagram 25] FIG. 25 is a side view of the base plate of FIG. 23 according to one embodiment of the present disclosure. [Figure 26] FIG. 26 is another side view of the base plate of FIG. 23 according to one embodiment of the present disclosure. [Figure 27]FIG. 27 is another side view of the base plate of FIG. 23 according to one embodiment of the present disclosure. [Figure 28] FIG. 28 is a cross-sectional view of the base plate of FIG. 23 according to one embodiment of the present disclosure. [Figure 29] FIG. 29 is a top perspective view of a central screw for use with the glenoid implant of FIG. 16 according to one embodiment of the present disclosure. [Diagram 30] FIG. 30 is a side view of the central screw of FIG. 29 according to one embodiment of the present disclosure. [Diagram 31] FIG. 31 is a cross-sectional view of the central screw of FIG. 29 according to one embodiment of the present disclosure. [Diagram 32] FIG. 32 is a top perspective view of a circumferential compression screw for use with the glenoid implant of FIG. 16 according to one embodiment of the present disclosure. [Diagram 33] FIG. 33 is a side view of the circumferential compression screw of FIG. 32 according to one embodiment of the present disclosure. [Diagram 34] FIG. 34 is a cross-sectional view of the circumferential compression screw of FIG. 32 according to one embodiment of the present disclosure. [Diagram 35] FIG. 35 is a top perspective view of a modular locking taper for use with the glenoid implant of FIG. 16 of FIG. 32 according to one embodiment of the present disclosure. [Diagram 36] FIG. 36 is a side view of the modular locking taper of FIG. 35 according to one embodiment of the present disclosure. [Figure 37] FIG. 37 is a cross-sectional view of the modular locking taper of FIG. 35 according to one embodiment of the present disclosure. [Figure 38] FIG. 38 is a top perspective view of the glenosphere of the glenoid implant of FIG. 16 according to one embodiment of the present disclosure. [Figure 39] FIG. 39 is a bottom perspective view of the glenosphere of FIG. 38 according to one embodiment of the present disclosure. [Diagram 40] FIG. 40 is a top view of the glenosphere of FIG. 38 according to one embodiment of the present disclosure. [Diagram 41] FIG. 41 is a side view of the glenosphere of FIG. 38 according to one embodiment of the present disclosure. [Diagram 42] FIG. 42 is a cross-sectional view of the glenosphere of FIG. 38 according to one embodiment of the present disclosure. [Diagram 43] FIG. 43 is a top perspective view of a post for use with the glenoid implant of FIG. 16 according to one embodiment of the present disclosure. [Diagram 44] FIG. 44 is a side view of the support post of FIG. 43 according to one embodiment of the present disclosure. [Diagram 45] FIG. 45 is a cross-sectional view of the strut of FIG. 43 according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Generally described, disclosed herein is a glenoid implant for a shoulder prosthesis. Additionally, a surgical method for using the glenoid implant is described.

[0021] In the detailed description of the present invention 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.

[0022] 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.

[0023] Similarly, a location or orientation may be used herein with reference to an anatomical structure or surface. For example, since the current 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 surfaces, locations, directions, or orientations of the implants, devices, systems, and methods. Furthermore, the implants, devices, systems, and methods 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 (the midline), it is expressly expected that the implants, devices, systems, and methods described and / or illustrated herein, as well as their aspects, components, features, etc., may be modified, altered, reconfigured, or otherwise altered for use with or 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 implants, 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 on a left shoulder, and vice versa. Additionally, while the implants, 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 implants, devices, systems and methods may be used on other bones of the body having similar structures, such as, for example, the lower extremities, and more specifically, the ankle, foot and foot bones.

[0024] Referring to the drawings, where like reference numbers are used to indicate like or similar components throughout the several views, and with particular reference to FIGS. 1-15, an embodiment of a glenoid or reverse glenoid implant 100 is shown. The glenoid implant 100 includes a first or outer end 102 and a second or medial end 104. The first end 102 is disposed opposite the second end 104. The glenoid implant 100 also includes a base plate 110, a central screw 130, at least one peripheral screw 150, a linking member 160, a glenosphere 180, and a post 200. The central screw 130 is inserted through a bore 116 of the base plate 110. The linking member 160 then engages the base plate 110 at a first end to secure the central screw 130 within the bore 116. The second end of the linking member 160 is received within the glenosphere 180. The post 200 may then extend through the glenosphere 180 and the connecting member 160 into the recess 136 of the central screw 130. At least one peripheral screw 150 may be inserted through the at least one peripheral bore 122 prior to securing the glenosphere 180 to the connecting member 160 with the post 200.

[0025] 7-15, the base plate 110 is cylindrical and includes an upper surface 112 and a lower or bottom surface 114. The base plate 110 may include, for example, a fixed or continuous outer ring that surrounds the board 122 and the keel 124. The base plate 110 may also include a central bore 116 that extends through the base plate 110 from the upper surface 112 to the lower surface 114. As shown in FIGS. 7, 8 and 15, the central bore 116 may include, for example, a first portion or proximal inner threaded portion 118 that extends from the upper surface 112 into the base plate 110. Additionally, the central bore 116 may include, for example, a second portion or distal non-threaded portion 120 that extends from the first portion 118 to the lower surface 114 of the base plate 110. The base plate 110 may also include a plurality of peripheral bores 122 extending through the base plate 110 from the upper surface 112 to the lower surface 114. The bores 122 may be, for example, equally spaced around the circumference of the base plate 110, or may not be equally spaced around the circumference of the base plate 110. In the illustrated embodiment, the plurality of peripheral bores 122 includes three peripheral bores 122. The bottom surface 114 of the base plate 110 may be, for example, curved or arcuate. The base plate 110 may also include a plurality of individual arcuate keels, ridges, or protrusions 124. The protrusions 124 may extend away from the bottom surface 114 of the base plate 110. The base plate 110 may also include a plurality of through openings 126 extending through the base plate 110 from the upper surface 112 to the lower surface 114. The through openings 126 may be disposed, for example, between the plurality of perimeter boards 122 and adjacent to the plurality of protrusions 124 on the lower surface 114 of the base plate 110 .

[0026] The central thread 130 as shown in FIGS. 7-15 may include a proximal unthreaded portion 132 and a distal threaded portion 142. The distal threaded portion 142 may extend away from the bottom of the proximal unthreaded portion 132. The proximal portion 132 may include a head portion 134 disposed at a first end of the central thread 130. The head portion 134 may have a diameter greater than the diameter of a main portion of the proximal portion 132 of the central thread 130, for example. The proximal portion 132 may also include a recess 136 extending from the first end of the central thread 130 to the proximal portion 132. The recess 136 may include a first portion or proximal female section 138 and a second portion or threaded portion 140. The first portion 138 may extend from the first end toward the second end of the central thread 130, and the second portion 140 may extend from the bottom of the first portion 138 to the bottom of the recess 136. The first portion 138 may be, for example, a drive feature for engaging with a tool for inserting or removing the central screw 130. The second portion 140 may be, for example, threaded to receive the corresponding screw 210 of the post 200. The proximal portion 132 may have, for example, a texture or coating to provide porous fixation. The proximal portion 132 may be configured or sized and shaped to preserve bone, for example. The distal threaded portion 142 may be, for example, threaded to engage a patient's bone to secure the base plate 110 to the patient's bone, such as a glenoid.

[0027] 7-15, at least one circumferential screw 150 is shown. The at least one circumferential screw 150 may include a head portion 152 with a drive aperture 154 recessed in the head portion 152 from a first end of the circumferential screw 150. The at least one circumferential screw 150 may also include a thread portion 156 extending away from a bottom surface of the head portion 152 to a second end of the circumferential screw 150. The at least one circumferential screw 150 may be, for example, three circumferential screws 150 as shown in the illustrated embodiment. Alternative numbers of circumferential screws 150 are also contemplated to correspond to the number of circumferential bores 122 of the base plate 110. The circumferential screws 150 may be inserted through the circumferential bores 122 of the base plate 110 to engage a patient's bone, such as a glenoid cavity, to aid in securing the base plate 110 to the patient's bone.

[0028] A coupling member or modular taper 160 is shown in Figures 7-15. The coupling member 160 may include an externally threaded portion 162 at a distal or second end of the coupling member 160. The coupling member 160 may also include a proximal recess 164 extending into the coupling member 160 from the first end. The coupling member 160 may also include a central bore 166 extending through the coupling member 160 from the first end to the second end. The proximal recess 164 may overlap the central bore 166, for example, at the first end of the coupling member 160.

[0029] With continued reference to FIGS. 7-15, the glenosphere 180 may include a central bore 182 extending through the glenosphere 180 from a first end to a second end. The central bore 182 may include a distal tapered portion 184, a central threaded portion 186, and a proximal cylindrical portion 188. The distal tapered portion 184 may extend from the second end toward the first end of the glenosphere 180. The central threaded portion 186 may be disposed between the distal tapered portion 184 and the proximal cylindrical portion 188. The proximal cylindrical portion 188 may extend from the central threaded portion 186 to the first end of the glenosphere 180. As shown in FIGS. 7, 8, and 15, the diameter of the distal tapered portion 184 may be greater than the diameter of the proximal cylindrical portion 188, for example. Additionally, the diameter of the central threaded portion 186 may be smaller than the diameters of the proximal cylindrical portion 188 and the distal tapered portion 184. The distal tapered portion 184 may include sidewalls that taper as they extend from the second end of the glenosphere 180 to the central threaded portion 186. The second end of the glenosphere 180 may include a recessed region 190 disposed between a first or outer lip 192 and a protrusion 194. The first lip 192 may surround the circumference of the second end of the glenosphere 180. The first lip 192 may be, for example, a constant or continuous ring that surrounds the recessed region 190. The protrusion 194 may surround the central bore 182 of the second end of the glenosphere 180.

[0030] The post 200 is shown in Figures 7-15. The post 200 may include a cylindrical proximal head 202 disposed at a first end of the post 200. The cylindrical proximal head 202 may include, for example, a proximal recess 204 extending from the first and second post 200 into the proximal head 202. The post 200 may also include a central portion 206 extending away from a second end of the proximal head 202. Additionally, the post 200 may include a distal portion 208 disposed at the second end of the post 200. The post 200 may also include an externally threaded portion 210 disposed between the central portion 206 and the distal portion 208. The threaded portion 210 may be configured or sized and shaped to engage, for example, the second threaded portion 140 of the central screw 130.

[0031] As shown in FIGS. 1-6, the implant 100 may be assembled, for example, by inserting the central screw 130 through the central bore 116 of the base plate 110. The threaded portion 162 of the coupling member 160 may then be threaded into the proximal inner threaded portion 118 of the base plate 110 to secure the central screw 130 to the base plate 110. After the base plate 110, the central screw 130, and the coupling member 160 are secured together, they may be inserted, for example, into a patient, coupled together. At least one peripheral screw 150 may then be inserted through the multiple peripheral bores 122 of the base plate 110. The distal tapered portion 184 of the glenosphere 180 may then be coupled to the proximal end of the coupling member 160. The coupling member 160 may, for example, allow angulation of the peripheral screw 150 before the coupling member 160 is attached to help prevent the central screw 130 from backing out when the glenosphere 180 is attached. The post 200 may then be inserted through the central bore 182 of the glenosphere 180 and the central bore 166 of the coupling member 160 into the recess 136 of the central screw 130 such that the threaded portion 210 of the post 200 engages with the threaded portion 140 of the central screw 130 .

[0032] The surgical method for implanting the glenoid implant 100, 300 may include preparing the patient's joint by performing sizing and alignment steps. Next, the bone may be reamed to form a channel and recess to receive the glenoid implant 100, 300. The selected glenoid implant 100, 300 may then be inserted and bonded to the bone. Finally, the surgical procedure may be completed and the patient's incision may be closed.

[0033] 16-45, there is shown another embodiment of a glenoid or reverse glenoid implant 300. As shown in FIGS. 21-22, the glenoid implant 300 includes a base plate 310, a central screw 330, peripheral compression screws 350, a modular taper 260, a glenosphere 380, and posts 390.

[0034] 23-28, the base plate 310 is cylindrical and includes an upper surface 312 and a lower or bottom surface 314. The base plate 310 also includes a central bore 316 extending between the upper surface 312 and the lower surface 314. The base plate 310 also includes a plurality of peripheral bores 322 disposed about the central bore 316. In addition, the base plate includes a plurality of individual arcuate keels 324 extending away from the bottom surface 314 of the base plate 310. As shown in FIG. 28, the central bore 316 of the base plate 310 includes a proximal inner threaded portion 318 and a distal unthreaded portion 320.

[0035] 29-31, the central screw 330 includes a central axis, a proximal non-threaded portion 332 having a cylindrical shape, and a distal threaded portion 344. The central screw 330, as well as the proximal non-threaded portion 332 and / or the distal threaded portion 344, can include any desired length or width. Advantageously, the reverse glenoid system can include multiple central screws 330 having various overall lengths and various portion lengths. The non-threaded portion 342 of the central screw 330 can further include a bone ingrowth surface including texturing, pores, holes, and / or a bone ingrowth surface sprayed with mechanical or biological bone ingrowth promoting material. The central screw 330 also includes a proximal head portion 334. The head portion 334 has a surface area that increases in a direction opposite the threaded portion 342. The head portion 334 of the central screw 330 includes a recess 336 including a proximal female section 338 for engaging a torque device (such as a screwdriver). The recess 336 includes a central threaded portion 340 and a distal non-threaded portion 342. The recess 336 is disposed through the proximal head 334. As shown in FIGS. 21 and 22 , the central screw 330 is slidably disposed through the central bore 316 of the base plate 310. The diameter of the head 334 is larger than the diameter of the non-threaded portion 332 of the central bore 316 of the base plate 310 such that the central screw 330 is captured by the central bore 316 of the base plate. The central screw 330 is suitable for screwing into, for example, a bone.

[0036] 32-34 show peripheral screws 350. Screws 350 may be, for example, standard compression screws of a type known in the orthopedic implant art. Peripheral screws 350 may include a head portion 352, a drive aperture 354 inserted into head portion 352 at a first end of screw 350, and a threaded portion 356 extending away from head portion 352. Each screw 350 is insertable through at least one of peripheral bores 322 of base plate 310 into a desired bone to compress implant 300 into the bone.

[0037] 35-37, a coupling member or modular taper 360 is shown. The modular taper 360 includes an outer tapered cylindrical shape. The modular taper 360 further includes a distal outer threaded portion 362 and a proximal recess 364 for engagement with a torque device, such as a screwdriver. The modular taper 360 also includes a central bore 366 disposed therethrough. As shown in FIGS. 21 and 22, the modular taper 360 is threadedly connected within the central bore 316 of the base plate 310.

[0038] 38-42, there is shown a glenosphere 380. The glenosphere 380 is hemispherical and includes a central bore 382 having a distal tapered portion 384, a central threaded portion 386, and a proximal cylindrical portion 388. In FIGS. 21 and 22, the glenosphere 380 is positioned over the modular taper 360 such that the exterior of the modular taper 360 and the distal tapered portion 384 of the glenosphere bore 382 form a mechanical taper connection.

[0039] 28-30 collectively, a post 390 is shown. The post 390 includes a cylindrical proximal head 392 having a diameter and a proximal recess 394 for engaging a torque device. The post 390 further includes a central portion 396 having a diameter smaller than the diameter of the post proximal head 392 and a distal portion 398 having a diameter smaller than the diameter of the post proximal head 392. The post 390 also includes an externally threaded portion 300 disposed along a portion of the post 390 between the central post portion 396 and the distal post portion 398. When assembled, the post 390 is disposed through the central bore 382 of the glenosphere 380, through the central bore 366 of the modular taper 360, and threadably connected to the recess 336 of the central screw 330, as shown in FIGS. 21 and 22.

[0040] The implant 300 according to the present disclosure offers several advantages over other known reverse glenoid devices. The base plate 310 can accept a central locking screw 330 to provide compression, which is then locked into place to stiffen the construct via a tapered cap 360 that accepts a glenosphere 380. The construct can be pre-assembled to allow the surgeon to insert the entire locked construct 300 as one piece to streamline the process or simplify revision surgery. Tapers can be added later and / or have built-in offsets to allow for decentering, or have longer taper options for laterally incorporating.

[0041] The screw 330 has a post portion that essentially replaces the distal post of the baseplate, transferring its shape to the screw, allowing the post diameter to be much smaller since the screw does not have to pass through it, ultimately preserving bone. Additionally, the screw 330 passes through the baseplate, providing compression through the threaded portion as well as long term fixation through the proximal portion.

[0042] An exemplary method of using the orthopaedic implant assembly 300 includes placing the base plate 310 on the bone, inserting the central screw 330 into the bone through the base plate 310, inserting the peripheral compression screws 350 through the peripheral bores 322 of the base plate 310, and threading the modular taper 360 into the central bore 316 of the base plate 310. These steps can be performed during an open surgical procedure or can be pre-assembled prior to surgery.

[0043] Next, an exemplary method of using the implant 300 of the present disclosure includes placing the glenosphere 380 onto the modular taper 360, inserting the post 390 into the glenosphere 380 and taper 360, and threading the same into the central screw 330.

[0044] 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 implants, devices, and / or systems 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 similar functionality 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 implants, devices, and / or systems may include more or fewer components or features than the embodiments described and illustrated herein. For example, the components and features of the implants 100, 300 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 implants 100, 300 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.

[0045] 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.

[0046] 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. [Embodiment] (1) a base plate; a central screw extending through the central bore into the base plate; a glenosphere, wherein a top surface of the base plate contacts a bottom surface of the glenosphere; a post that engages a portion of the central bore of the glenosphere and a portion of the central screw; At least a portion of the central bore of the base plate is threaded. (2) The central screw is The head part and a proximal non-threaded portion extending from the second end of the head portion; a distal threaded portion extending from a second end of the proximal unthreaded portion; and a recess extending from a first end through the head portion into the central screw and extending into the proximal unthreaded portion; The recessed portion is a first portion extending from the first end of the central screw toward a second end of the central screw; 2. The implant of embodiment 1, having a second portion extending from a second end of the first portion toward the second end of the central screw. (3) the recess has a third portion extending from the second end of the second portion to a bottom of the recess; 3. The implant of embodiment 2, wherein the third portion is unthreaded. (4) The implant of embodiment 3, wherein the post extends through the glenosphere to the central screw. (5) An implant as described in embodiment 4, having at least one peripheral screw housed within at least one of the plurality of peripheral bores of the base plate. (6) The implant of embodiment 1, wherein the base plate has a plurality of protrusions extending from a bottom surface of the base plate. (7) The implant of embodiment 6, wherein each of the plurality of protrusions is disposed adjacent to a respective one of the plurality of peripheral bores. (8) The implant of embodiment 1, wherein the post connects the glenosphere to the base plate. (9) The post is: a proximal head disposed on a first end of the post; a central portion extending from the second end of the proximal head; a distal portion disposed at a second end of the post; 2. The implant of claim 1, further comprising a threaded portion extending from the central portion. (10) The implant of embodiment 9, wherein the post further comprises a proximal recess extending from the first end of the post to the proximal head. (11) The implant of embodiment 9, wherein the recess of the central screw receives the distal portion of the post. (12) The implant of embodiment 11, wherein the recess of the central screw receives a portion of the central portion of the post. (13) An implant according to any one of embodiments 1-5, comprising a connecting member connected to a portion of the central bore of the base plate. (14) The implant of embodiment 13, wherein the post further extends through the coupling member. (15) The connecting member is a central bore extending through the coupling member from the first end to the second end; a proximal recess extending into the coupling member from a first end; a threaded portion disposed on an exterior surface of the second end; 15. An implant as described in embodiment 14, having a plurality of protrusions extending from the first end of the coupling member for engaging the glenosphere. [Embodiment B] (1) a base plate; a central screw extending through the central bore into the base plate; a coupling member that engages a portion of the central bore of the base plate; An implant comprising: (2) a glenosphere coupled to the coupling member; and a post extending through the glenosphere, the connecting member and the central screw; The implant of embodiment 1 further comprises: (3) The implant of embodiment 2, further comprising at least one peripheral screw received within the plurality of peripheral bores of the base plate. (4) the central bore of the base plate is a proximal internally threaded portion extending from the first end toward the second end of the base plate; The implant of embodiment 3, further comprising a distal unthreaded portion extending from the proximal internal threaded portion to the second end of the base plate. (5) The implant of embodiment 4, wherein the base plate further comprises a plurality of protrusions extending away from a bottom surface of the base plate. (6) The implant of embodiment 5, wherein each of the plurality of protrusions is disposed adjacent to a respective one of the plurality of peripheral bores. (7) the base plate further comprises a plurality of through openings extending through the base plate from the first end to the second end; The implant of embodiment 6, wherein the plurality of through openings are disposed adjacent to the at least one protrusion of the plurality of protrusions. (8) The central screw is The head part and a proximal non-threaded portion extending away from the second end of the head portion; a distal threaded portion extending away from the second end of the proximal unthreaded portion; and The implant of embodiment 4, further comprising: (9) The implant of embodiment 8, wherein the central screw includes a recess extending from the first end through the head portion to the central screw and into the proximal non-threaded portion. (10) The recessed portion is a first portion of the central screw extending from the first end toward the second end; a second portion extending from a second end of the first portion to a bottom of the recess; The implant of embodiment 9, comprising: (11) The implant of embodiment 10, wherein the second portion is threaded. (12) The connecting member is a distal outer threaded portion; a central bore extending through the coupling member from the first end to the second end; a proximal recess extending into the first end of the coupling member and engaging the central bore; The implant of embodiment 10, comprising: (13) The implant of embodiment 12, wherein the coupling member further comprises a plurality of protrusions extending from the first end of the coupling member. (14) The glenosphere is a central bore extending through the glenosphere from a first end to a second end; a recessed region extending from the second end into the glenosphere; a first lip extending away from the second end of the glenosphere and surrounding the recessed area; a protrusion extending away from the second end of the glenosphere and surrounding the central bore; The implant of embodiment 12, comprising: (15) The central bore is a proximal cylindrical portion extending from the first end toward the second end of the glenosphere; a distal tapered portion extending from the second end toward the first end of the glenosphere; a central threaded portion disposed between the proximal cylindrical portion and the distal tapered portion; The implant of embodiment 14, comprising: (16) The support pillar is A head portion and a stem extending away from the head portion; Equipped with The implant of embodiment 15, wherein the head portion includes an engagement recess extending from the first end of the post to the head portion. (17) The stem comprises: a central portion extending away from a bottom surface of the head portion to the second end; a distal portion extending from the second end toward the central portion; an externally threaded portion disposed between the central portion and the distal portion; The implant of embodiment 16, comprising: (18) A cylindrical base plate; A central screw, a peripheral compression screw and a peripheral screw; Modular taper; Glenosphere and The pillars and 1. An orthopaedic implant assembly comprising: The base plate is The top surface and The underside and a central bore disposed from the upper surface to the lower surface, the central bore having a proximal internally threaded portion and a distal non-threaded portion; a plurality of peripheral bores disposed about said central bore; a plurality of discrete arcuate keels extending from the bottom surface of the base plate; Including, The central screw A central axis, a cylindrical proximal non-threaded portion; a distal threaded portion; a proximal head portion having a surface area that increases in a direction opposite said threaded portion; a recess disposed through the proximal head portion, the recess having a proximal portion for engaging a torque device; A central screw portion, a distal non-threaded portion; Equipped with the central screw is slidably disposed through the central bore of the base plate; a diameter of the head portion is greater than a diameter of the unthreaded portion of the central bore of the base plate such that the central screw is captured by the central bore of the base plate; said central screw being adapted to be screwed into a bone; the peripheral compression screw is disposed through one of the peripheral bores, the peripheral screw adapted to be screwed into bone; The modular taper is It is a tapered cylindrical shape, a distal threaded portion; a proximal recess for engaging a torque device; A central bore and It is equipped with the modular taper is threadedly connected to the central bore of the base plate to lock the central screw to the base plate; The glenosphere is It is hemispherical, a distal tapered portion; A central screw portion, a central bore having a proximal cylindrical portion; Equipped with the glenosphere is disposed over the modular taper such that an exterior of the modular taper and a distal tapered portion of the glenosphere bore form a mechanical taper connection; The support pillar is a cylindrical proximal head portion having a diameter and a proximal recess for engaging a torque device; a central portion having a diameter smaller than the diameter of the proximal head portion; a distal portion having a diameter smaller than the diameter of the proximal head portion; an externally threaded portion disposed along a portion of the strut between the central strut portion and the distal strut portion; Including, The post is disposed through the central bore of the glenosphere, further disposed through the central bore of the modular taper, further disposed in the recess of the central screw, and threadedly connected thereto. Orthopedic implant assembly. (19) The orthopedic implant assembly of embodiment 18, wherein the proximal non-threaded portion includes a surface connected from the group consisting of porous, textured, indented, and splayed. (20) A cylindrical base plate; A central screw, Modular taper; Glenosphere and The pillars and 1. An orthopaedic implant assembly comprising: The base plate is The top surface and The underside and a central bore disposed from the upper surface to the lower surface, the central bore having a proximal internally threaded portion and a distal non-threaded portion; a plurality of discrete arcuate keels extending from the bottom surface of the base plate; Including, The central screw A central axis, a cylindrical proximal non-threaded portion; a distal threaded portion; a proximal head portion having a surface area that increases in a direction opposite said threaded portion; a recess disposed through said proximal head portion, said recess having a proximal portion for engaging a torque device; A central screw portion, a distal non-threaded portion; Equipped with the central screw is slidably disposed through the central bore of the base plate; a diameter of the head portion is greater than a diameter of the unthreaded portion of the central bore of the base plate such that the central screw is captured by the central bore of the base plate; said central screw being adapted to be screwed into a bone; The modular taper is It is a tapered cylindrical shape, a distal threaded portion; a proximal recess for engaging a torque device; A central bore and It is equipped with the modular taper is threadably connected to the central bore of the base plate; The glenosphere is It is hemispherical, a distal tapered portion; A central screw portion, a central bore having a proximal cylindrical portion; Equipped with the glenosphere is disposed over the modular taper such that an exterior of the modular taper and a distal tapered portion of the glenosphere bore form a mechanical taper connection; The support pillar is a cylindrical proximal head portion having a diameter and a proximal recess for engaging a torque device; a central portion having a diameter smaller than the diameter of the proximal head portion; a distal portion having a diameter smaller than the diameter of the proximal head portion; an externally threaded portion disposed along a portion of the strut between the central strut portion and the distal strut portion; Including, The post is disposed through the central bore of the glenosphere, further disposed through the central bore of the modular taper, further disposed in the recess of the central screw, and threadedly connected thereto. Orthopedic implant assembly. (21) The orthopedic implant assembly system of embodiment 20, wherein the proximal non-threaded portion of each of the plurality of central screws includes a surface connected from the group consisting of porous, textured, indented, and splayed. (22) At least a cylindrical base plate; A plurality of central screws; At least one peripheral compression screw and a peripheral screw; at least one modular taper; Multiple glenospheres and At least one support; 1. An orthopaedic implant assembly comprising: The at least one base plate comprises: The top surface and The underside and a central bore disposed from the upper surface to the lower surface, the central bore having a proximal internally threaded portion and a distal non-threaded portion; a plurality of peripheral bores disposed about said central bore; a plurality of discrete arcuate keels extending from the bottom surface of the base plate; Including, Each central screw of the plurality of central screws comprises: A central axis, a cylindrical proximal non-threaded portion; a distal threaded portion; a proximal head portion having a surface area that increases in a direction opposite said threaded portion; a recess disposed through said proximal head portion, said recess having a proximal portion for engaging a torque device; A central screw portion, a distal non-threaded portion; Equipped with the central screw is slidably disposed through the central bore of the base plate; a diameter of the head portion is greater than a diameter of the unthreaded portion of the central bore of the base plate such that the central screw is captured by the central bore of the base plate; said central screw being adapted to be screwed into a bone; the at least one peripheral compression screw is disposed through one of the peripheral bores, the peripheral screw adapted to be screwed into bone; The at least one modular taper comprises: It is a tapered cylindrical shape, a distal threaded portion; a proximal recess for engaging a torque device; A central bore and It is equipped with the modular taper is threadably connected to the central bore of the base plate; Each glenosphere of the plurality of glenospheres comprises: It is hemispherical, a distal tapered portion; A central screw portion, a central bore having a proximal cylindrical portion; Equipped with the glenosphere is disposed over the modular taper such that an exterior of the modular taper and a distal tapered portion of the glenosphere bore form a mechanical taper connection; The at least one strut comprises: a cylindrical proximal head portion having a diameter and a proximal recess for engaging a torque device; a central portion having a diameter smaller than the diameter of the proximal head portion; a distal portion having a diameter smaller than the diameter of the proximal head portion; an externally threaded portion disposed along a portion of the strut between the central strut portion and the distal strut portion; Including, The post is disposed through the central bore of the glenosphere, further disposed through the central bore of the modular taper, further disposed in the recess of the central screw, and threadedly connected thereto. Orthopedic implant assembly system. (23) The orthopedic implant assembly system of embodiment 22, wherein each of the plurality of central screws includes a unique threaded portion length. (24) The orthopedic implant assembly system of embodiment 22, wherein each of the plurality of central screws includes a unique non-threaded length. (25) The orthopedic implant assembly system of embodiment 22, wherein the proximal non-threaded portion of each of the plurality of central screws includes a surface connected from the group consisting of porous, textured, indented, and splayed. (26) An orthopedic implant assembly system as described in embodiment 25, wherein each of the plurality of central screws includes a unique threaded portion length. (27) The orthopedic implant assembly system of embodiment 25, wherein each of the plurality of central screws includes a unique non-threaded length. (28) A method of using an orthopaedic implant assembly comprising the steps of surgically exposing and resecting a desired bone, inserting a cylindrical base plate into the bone; inserting a central screw through the base plate into the bone; inserting a peripheral screw through the peripheral bore into the bone; threading a modular taper into the central bore of the base plate; placing a glenosphere in the modular taper; Inserting and screwing a post through the glenosphere and the taper into the central screw recess; Including, The base plate is The top surface and The underside and a central bore disposed from the upper surface to the lower surface, the central bore having a proximal internally threaded portion and a distal non-threaded portion; a plurality of peripheral bores disposed about said central bore; a plurality of discrete arcuate keels extending from the bottom surface of the base plate; Including, The central screw A central axis, a cylindrical proximal non-threaded portion; a distal threaded portion; a proximal head portion having a surface area that increases in a direction opposite said threaded portion; a recess disposed through said proximal head portion, said recess having a proximal portion for engaging a torque device; A central screw portion, a distal non-threaded portion; Equipped with the central screw is slidably disposed through the central bore of the base plate; a diameter of the head portion is greater than a diameter of the unthreaded portion of the central bore of the base plate such that the central screw is captured by the central bore of the base plate; said central screw being adapted to be screwed into a bone; the peripheral screw is disposed through one of the peripheral bores, the peripheral screw being adapted to be screwed into a bone; The modular taper is It is a tapered cylindrical shape, a distal threaded portion; a proximal recess for engaging a torque device; A central bore and It is equipped with the modular taper is threadably connected to the central bore of the base plate; The glenosphere is It is hemispherical, a distal tapered portion; A central screw portion, a central bore having a proximal cylindrical portion; Equipped with the glenosphere is disposed over the modular taper such that an exterior of the modular taper and a distal tapered portion of the glenosphere bore form a mechanical taper connection; The support pillar is a cylindrical proximal head portion having a diameter and a proximal recess for engaging a torque device; a central portion having a diameter smaller than the diameter of the proximal head portion; a distal portion having a diameter smaller than the diameter of the proximal head portion; an externally threaded portion disposed along a portion of the strut between the central strut portion and the distal strut portion; Including, The post is disposed through the central bore of the glenosphere, further disposed through the central bore of the modular taper, further disposed in the recess of the central screw, and threadedly connected thereto. A method of using an orthopedic implant assembly. (29) A method of using an orthopaedic implant assembly system comprising the steps of surgically exposing and resecting a desired bone, selecting and inserting a cylindrical base plate into the bone; selecting and inserting a central screw through the base plate and into the bone; selecting and inserting a peripheral screw through the peripheral bore and into the bone; selecting and screwing a modular taper into the central bore of the base plate; selecting and placing a glenosphere onto said modular taper; selecting a post and inserting it through the glenosphere and the taper into the central threaded recess and screwing it in place; Including, The base plate is The top surface and The underside and a central bore disposed from the upper surface to the lower surface, the central bore having a proximal internally threaded portion and a distal non-threaded portion; a plurality of peripheral bores disposed about said central bore; a plurality of discrete arcuate keels extending from the bottom surface of the base plate; Including, The central screw A central axis, a cylindrical proximal non-threaded portion; a distal threaded portion; a proximal head portion having a surface area that increases in a direction opposite said threaded portion; a recess disposed through the proximal head portion, the recess having a proximal portion for engaging a torque device; A central screw portion, a distal non-threaded portion; Equipped with the central screw is slidably disposed through the central bore of the base plate; a diameter of the head portion is greater than a diameter of the unthreaded portion of the central bore of the base plate such that the central screw is captured by the central bore of the base plate; said central screw being adapted to be screwed into a bone; the peripheral screw is disposed through one of the peripheral bores, the peripheral screw being adapted to be screwed into a bone; The modular taper is It is a tapered cylindrical shape, a distal threaded portion; a proximal recess for engaging a torque device; A central bore and It is equipped with the modular taper is threadably connected to the central bore of the base plate; The glenosphere is It is hemispherical, a distal tapered portion; A central screw portion, a central bore having a proximal cylindrical portion; Equipped with the glenosphere is disposed over the modular taper such that an exterior of the modular taper and a distal tapered portion of the glenosphere bore form a mechanical taper connection; The support pillar is a cylindrical proximal head portion having a diameter and a proximal recess for engaging a torque device; a central portion having a diameter smaller than the diameter of the proximal head portion; a distal portion having a diameter smaller than the diameter of the proximal head portion; an externally threaded portion disposed along a portion of the strut between the central strut portion and the distal strut portion; Including, The post is disposed through the central bore of the glenosphere, further disposed through the central bore of the modular taper, further disposed in the recess of the central screw, and threadedly connected thereto. A method of using an orthopaedic implant assembly system. (30) The method of embodiment 29, wherein the base plate, the central screw and the modular taper are pre-assembled as a single unit and inserted into the implant as a single unit. (31) A base plate; a central screw extending through the central bore into the base plate; a coupling member that engages a portion of the central bore of the base plate; The implant comprises: (32) A glenosphere coupled to the coupling member; a post passing through the glenosphere, the connecting member and the central screw; The implant of embodiment 31 further comprising: (33) The implant according to any one of embodiments 1 to 32, further comprising at least one peripheral screw received within a plurality of peripheral bores of the base plate. (34) The central bore of the base plate is a proximal internally threaded portion extending from the first end of the base plate toward the second end; a distal unthreaded portion extending from the proximal internally threaded portion to the second end of the base plate; The implant according to any one of embodiments 1 to 33, further comprising: (35) The implant of any one of embodiments 1 to 34, wherein the base plate further comprises a plurality of protrusions extending away from a bottom surface of the base plate. (36) The implant according to any one of embodiments 1 to 35, wherein each of the plurality of protrusions is disposed adjacent to a respective one of the plurality of peripheral bores. (37) The base plate further comprises a plurality of through openings extending through the base plate from the first end to the second end; The implant of any one of embodiments 1 to 36, wherein the plurality of through openings are disposed adjacent to at least one protrusion of the plurality of protrusions. (38) The central screw is The head part and a proximal non-threaded portion extending away from the second end of the head portion; a distal threaded portion extending away from the second end of the proximal unthreaded portion; and The implant according to any one of embodiments 1 to 37, further comprising: (39) The implant of any one of embodiments 1 to 38, wherein the central screw further comprises a recess extending into the central screw from the first end through the head portion to the proximal non-threaded portion. (40) The recessed portion is a first portion of the central screw extending from the first end toward the second end; a second portion extending from the second end of the first portion to a bottom surface of the recess; The implant according to any one of embodiments 1 to 39, comprising: (41) The implant according to any one of embodiments 1 to 40, wherein the second portion is screwed. (42) The connecting member is a distal outer threaded portion; a central bore extending through the coupling member from the first end to the second end; a proximal recess extending into the first end of the coupling member and engaging the central bore; The implant according to any one of embodiments 1 to 41, comprising: (43) The implant according to any one of embodiments 1 to 42, wherein the coupling member further comprises a plurality of protrusions extending away from the first end of the coupling member. (44) The glenosphere, a central bore extending through the glenosphere from a first end to a second end; a recessed region extending from the second end into the glenosphere; a first lip extending away from the second end of the glenosphere and surrounding the recessed area; a protrusion extending away from the second end of the glenosphere and surrounding the central bore; The implant according to any one of embodiments 1 to 43, comprising: (45) The central bore is a proximal cylindrical portion extending from the first end toward the second end of the glenosphere; a distal tapered portion extending from the second end toward the first end of the glenosphere; a central threaded portion disposed between the proximal cylindrical portion and the distal tapered portion; The implant according to any one of embodiments 1 to 44, comprising: (46) The support pillar is The head part and a stem extending away from the head portion; Equipped with The impactor according to any one of embodiments 1 to 45, wherein the head portion includes an engagement recess extending from a first end of the support to the head portion. (47) The stem comprises: a central portion extending from a bottom surface of the head portion toward the second end; a distal portion extending from the second end toward the central portion; an externally threaded portion disposed between the central portion and the distal portion; The implant according to any one of embodiments 1 to 46, comprising:

Claims

1. A base plate; a central screw extending through a central bore of the base plate; a glenosphere, wherein a top surface of the base plate contacts a bottom surface of the glenosphere; a post engaging a portion of the central bore of the glenosphere and a portion of the central screw; At least a portion of the central bore of the base plate is threaded; The central screw The head part and a proximal non-threaded portion extending from the second end of the head portion; a distal threaded portion extending from a second end of the proximal unthreaded portion; and a recess within the central screw extending from a first end of the central screw through the head portion and into the proximal unthreaded portion; The recessed portion is a first portion extending from the first end of the central screw toward a second end of the central screw; a second threaded portion extending from a second end of the first portion toward the second end of the central screw.

2. The support, a proximal head disposed on a first end of the post; a central portion extending from the second end of the proximal head; a distal portion disposed at a second end of the strut; and a threaded portion disposed between the central portion and the distal portion, The implant of claim 1 , wherein the threaded portion of the post is configured to engage the second threaded portion of the recess of the central screw.

3. the recess has a third portion extending from a second end of the second threaded portion to a bottom of the recess; The implant of claim 1 , wherein the third portion is unthreaded.

4. The implant of claim 3 , wherein the posts extend through the glenosphere and into the central screw.

5. The implant of claim 4 , further comprising at least one peripheral screw received within at least one of the plurality of peripheral bores of the base plate.

6. The implant of claim 5 , wherein the base plate includes a plurality of protrusions extending from a bottom surface of the base plate.

7. The implant of claim 6 , wherein each protrusion of the plurality of protrusions is disposed adjacent a respective peripheral bore of the plurality of peripheral bores.

8. The implant of claim 1 , wherein the struts connect the glenosphere to the base plate.

9. The support pillar is a proximal head disposed on a first end of the post; a central portion extending from the second end of the proximal head; a distal portion disposed at a second end of the strut; and The implant of claim 1 , further comprising a threaded portion extending from said central portion.

10. 10. The implant of claim 9, wherein the post further comprises a proximal recess extending from the first end of the post to the proximal head.

11. The implant of claim 9 , wherein the recess of the central screw receives the distal portion of the post.

12. The implant of claim 11 , wherein the recess in the central screw receives a portion of the central portion of the post.

13. The implant of any of claims 1 to 5, further comprising a linking member coupled to a portion of the central bore of the base plate.

14. The implant of claim 13 , wherein the post further extends through the coupling member.

15. The connecting member is a central bore extending from a first end of the coupling member to a second end of the coupling member; a proximal recess extending into the coupling member from the first end of the coupling member; 15. The implant of claim 14, further comprising a thread disposed on an exterior surface of the second end of the coupling member.

16. An implant as described in claim 15, wherein the first end of the connecting member is received within the central bore of the glenosphere and the second end of the connecting member is received within the central bore of the base plate.

17. The support, a proximal head disposed on a first end of the post; a central portion extending from the second end of the proximal head; a distal portion disposed at a second end of the strut; and a threaded portion disposed between the central portion and the distal portion, The implant of claim 3 , wherein the third portion of the recess of the central screw receives the distal portion of the post.

18. A base plate; a central screw extending through a central bore of the base plate; a glenosphere, wherein a top surface of the base plate contacts a bottom surface of the glenosphere; a post engaging a portion of the central bore of the glenosphere and a portion of the central screw; a coupling member coupled to a portion of the central bore of the base plate; At least a portion of the central bore of the base plate is threaded; The connecting member is a central bore extending from a first end of the coupling member to a second end of the coupling member; a proximal recess extending into the coupling member from the first end of the coupling member; a threaded portion disposed on an exterior surface of the second end of the coupling member; An implant, wherein the first end of the coupling member is received within the central bore of the glenosphere and the second end of the coupling member is received within the central bore of the base plate.

19. The implant of claim 18, wherein the threaded portion of the connecting member is configured to be screwed into the threaded portion of the central bore of the base plate.

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