Arthroplasty devices, systems, instruments, and methods

Abstract

An arthroplasty system may include a bone joint prosthesis, a bone anchor, a retention member, an articular component, and a component fastener. The bone joint prosthesis may include a bone-facing surface, a component-facing surface, and an anchor passageway formed therethrough. The bone anchor may be receivable through the anchor passageway to secure the bone joint prosthesis to a bone. The retention member may be couplable with the bone joint prosthesis to retain the bone anchor within the anchor passageway. The articular component may be couplable with the bone joint prosthesis and may include a component passageway formed therethrough. The component fastener may secure the articular component to the bone joint prosthesis by coupling within the component passageway, extending through the retention member, and coupling with the bone anchor to secure the articular component to the bone joint prosthesis.

Description

ARTHROPLASTY DEVICES, SYSTEMS, INSTRUMENTS, AND METHODS TECHNICAL FIELD

[0001] The present disclosure relates to joint arthroplasty devices, systems, instruments, and methods. More specifically, the present disclosure relates to improved devices, systems, instruments, and methods for performing joint arthroplasty procedures. While portions of the present disclosure are made in the context of humeral and glenoid devices, systems, instruments, and methods for shoulder arthroplasty, the disclosed principles are applicable to arthroplasty devices, systems, instruments, and methods for other bone joints as well.BACKGROUND

[0002] Joint arthroplasty procedures can restore the function of unhealthy bone joints. Typically, these procedures involve replacing the unhealthy natural articulating surfaces of the bone joint with artificial articulating surfaces. The new artificial articulating surfaces are typically anchored into the adjacent bones of the bone joint to maintain long term stability.

[0003] In shoulder arthroplasty, a humeral implant is attached to the humerus, and a glenoid implant is attached to the glenoid area of the scapula bone. There are two different main categories of shoulder arthroplasty' procedures: anatomic and reverse. In an anatomic procedure, the implant designs are intended to replicate the natural anatomy. The humeral head is replaced with a similarly’ shaped convex hemispherical surface, while the glenoid is replaced with a shallow concave socket. In a reverse procedure, the natural ball and socket shapes are reversed (i.e., the humeral head is replaced with a socket fixed to the humerus, and the glenoid is replaced with a ball or glenosphere fixed to tire glenoid area of the scapula bone).

[0004] Regardless of the ty pe of procedure, secure fixation of the articular components to the prostheses attached to the bones in the bone joint is of paramount importance to ensure long term stability and successful outcomes. Accordingly, improved devices, systems, instruments, and methods for securely coupling articular components to bone joint prostheses would be desirable.

[0005] Portions of the present disclosure are made in the context of glenoid and humeral devices, systems, instruments, and methods for shoulder arthroplasty. However, it will be understood that these concepts can be adapted for use with other bone joints including, but not limited to: hip arthroplasty procedures, knee arthroplasty procedures, ankle arthroplasty procedures, elbow arthroplasty procedures, ankle / foot arthroplasty procedures, wrist / hand arthroplasty procedures, etc.SUMMARY

[0006] The various arthroplasty devices, systems, instruments, and methods of the present disclosure have been developed in response to the present state of the art, and in particular, in response to the problems and needs in the art that have not yet been fully solved by currently available arthroplasty devices, systems, instruments, and methods.

[0007] In some embodiments, an arthroplasty' system may include a bone joint prosthesis, a bone anchor, a retention member, an articular component, and a component fastener. The bone joint prosthesismay be configured to engage a bone of a bone joint and may include a bone-facing surface, a component-facing surface opposite the bone-facing surface, and an anchor passageway formed through die bone joint prosthesis intermediate the bone-facing surface and the component-facing surface. The bone anchor may be receivable through the anchor passageway to secure die bone joint prosthesis to the bone. The retention member may be couplable with the bone joint prosthesis to retain the bone anchor within the anchor passageway. The articular component may be couplable with the bone joint prosthesis and may include an articular surface configured to replace a natural articular surface of the bone joint, a prosthesis-facing surface engageable with the component-facing surface of the bone joint prosthesis, and a component passageway formed through the articular component intermediate the articular surface and the prosthesis-facing surface. The component fastener may be configured to secure the articular component to the bone joint prosthesis, such that, when the arthroplasty system is assembled, the component fastener: couples within the component passageway of the articular component; extends through a retention member passageway formed through the retention member; and couples to the bone anchor to secure the articular component to the bone joint prosthesis.

[0008] The arthroplasty system according to any preceding paragraph, wherein the anchor passageway formed through the bone joint prosthesis includes a first tapered surface, and a head of the bone anchor includes a second tapered surface configured to engage the first tapered surface of the anchor passageway to secure the bone joint prosthesis to the bone.

[0009] The arthroplasty system according to any preceding paragraph, wherein the bone anchor includes a first abutment surface, and the retention member includes a second abutment surface configured to engage the first abutment surface of the bone anchor and impart a force thereon to retain the bone anchor within the anchor passageway.

[0010] The arthroplasty system according to any preceding paragraph, wherein the anchor passageway formed through the bone joint prosthesis includes an anchor passageway thread, and the retention member includes a retention member thread configured to engage the anchor passageway thread and couple the retention member with the bone joint prosthesis.

[0011] The arthroplasty system according to any preceding paragraph, wherein a proximal end of the bone anchor includes a first connection feature, and a distal end of the component fastener includes a second comiection feature configured to couple w ith the first connection feature to couple the component fastener with the bone anchor.

[0012] The arthroplasty system according to any preceding paragraph, wherein the first connection feature includes an inner bone anchor thread, and the second connection feature includes a component fastener thread configured to engage the inner bone anchor thread to couple the component fastener with the bone anchor.

[0013] The arthroplasty system according to any preceding paragraph, wherein the articular component includes a third abutment surface, and the component fastener includes a fourth abutmentsurface configured to engage die third abutment surface of the articular component and impart a force thereon to secure the articular component to the bone joint prosthesis.

[0014] In some embodiments, an arthroplasty system for replacing a natural articular surface of a shoulder joint may include a shoulder joint prosthesis, a shoulder bone anchor, a retention member, an articular component, and a component fastener. The shoulder joint prosthesis may be configured to engage a bone of the shoulder joint and may include a bone-facing surface, a component-facing surface opposite the bone-facing surface, and an anchor passageway fonned through the shoulder joint prosthesis intermediate the bone-facing surface and the component-facing surface. The shoulder bone anchor may be receivable through the anchor passageway to secure the shoulder joint prosthesis to the bone. The articular component may be couplable with the shoulder joint prosthesis and may include an articular surface configured to replace the natural articular surface of the shoulder joint, a prosthesisfacing surface engageable with the component-facing surface of the shoulder joint prosthesis, and a component passageway formed through the articular component intermediate the articular surface and the prosthesis-facing surface. The component fastener may be configured to secure the articular component to the shoulder joint prosthesis, such that, when the arthroplasty system is assembled, the component fastener: couples within the component passageway of the articular component; extends through a retention member passageway formed through the retention member; and couples to the shoulder bone anchor to secure the articular component to the shoulder joint prosthesis.

[0015] The arthroplasty system according to any preceding paragraph, wherein the shoulder bone anchor includes at least one of a bone screw and a post.

[0016] The arthroplasty system according to any preceding paragraph, wherein the shoulder joint prosthesis includes at least one of a baseplate, an augmented baseplate, and a humeral stem.

[0017] The arthroplasty system according to any preceding paragraph, wherein the articular component includes at least one of a convex articular component having a convex articular surface, and a concave articular component having a concave articular surface.

[0018] The arthroplasty system according to any preceding paragraph, wherein the anchor passageway formed through the shoulder joint prosthesis includes an anchor passageway thread, and the retention member includes a retention member thread configured to engage the anchor passageway thread to couple the retention member with the shoulder joint prosthesis.

[0019] The arthroplasty system according to any preceding paragraph, wherein a proximal end of the shoulder bone anchor includes a first connection feature, and a distal end of the component fastener includes a second connection feature configured to couple with the first connection feature to couple the component fastener with the shoulder bone anchor.

[0020] The arthroplasty system according to any preceding paragraph, wherein the first connection feature includes an inner shoulder bone anchor thread, and the second connection feature includes a component fastener thread configured to engage the inner shoulder bone anchor thread to couple the component fastener with the shoulder bone anchor.

[0021] In some embodiments, a surgical kit may include at least one bone joint prosthesis, at least one bone anchor, at least one retention member, at least one articular component, and at least one component fastener. The at least one bone joint prosthesis may be configured to engage a bone of a bone joint and may include a bone-facing surface, a component-facing surface opposite the bone-facing surface, and an anchor passageway formed through the at least one bone joint prosthesis intermediate the bone-facing surface and the component-facing surface. The at least one bone anchor may be configured to be received through the anchor passageway to secure the at least one bone joint prosthesis to the bone. The at least one retention member may be couplable with the at least one bone joint prosthesis to retain the at least one bone anchor within the anchor passageway. The at least one articular component may be couplable with the at least one bone joint prosthesis and may include an articular surface configured to replace a natural articular surface of the bone joint, a prosthesis-facing surface engageable with the component-facing surface of the bone joint prosthesis, and a component passageway formed through the at least one articular component intermediate the articular surface and the prosthesis-facing surface. The at least one component fastener may be configured to secure the at least one articular component to the at least one bone joint prosthesis, such that, the at least one component fastener is configured to: couple within the component passageway of the at least one articular component, extend through a retention member passageway formed through the at least one retention member, and couple to the bone anchor to secure the at least one articular component to the at least one bone joint prosthesis.

[0022] The surgical kit according to any preceding paragraph, wherein the at least one bone anchor includes at least one of a bone screw and a post.

[0023] The surgical kit according to any preceding paragraph, wherein the at least one bone joint prosthesis includes at least one of a baseplate, an augmented baseplate, and a humeral stem.

[0024] The surgical kit according to any preceding paragraph, wherein the at least one articular component includes at least one of a convex articular component having a convex articular surface, and a concave articular component having a concave articular surface.

[0025] The surgical kit according to any preceding paragraph, wherein the at least one retention member includes at least one set screw.

[0026] The surgical kit according to any preceding paragraph, wherein the at least one component fastener includes at least one locking screw.

[0027] These and other features and advantages of the present disclosure will become more fully apparent from the following description and appended claims or may be learned by the practice of the devices, systems, instruments, and methods set forth hereinafter.BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Exemplar,' embodiments of the present disclosure will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. Understanding that these drawings depict only exemplary embodiments and are. therefore, not to beconsidered limiting of the scope of the appended claims, the exemplary embodiments of the present disclosure will be described with additional specificity and detail through use of the accompanying drawings in which:

[0029] FIG. 1 illustrates an exploded perspective view of an arthroplasty system, according to an embodiment of tire present disclosure;

[0030] FIG. 2 illustrates a perspective view of the arthroplasty system of FIG. 1, after assembly;

[0031] FIG. 3A illustrates a perspective top view of an articular component, according to an embodiment of the present disclosure;

[0032] FIG. 3B illustrates a top view of the articular component of FIG. 3 A;

[0033] FIG. 3C illustrates a perspective bottom view of the articular component of FIG. 3 A;

[0034] FIG. 3D illustrates a bottom view of the articular component of FIG. 3 A;

[0035] FIG. 3E illustrates a side view of the articular component of FIG. 3 A;

[0036] FIG. 3F illustrates a cross-sectional side view of the articular component taken along the line A-A in FIG. 3E;

[0037] FIG. 4A illustrates a perspective top view of a bone joint prosthesis, according to an embodiment of the present disclosure;

[0038] FIG. 4B illustrates a top view of the bone joint prosthesis of FIG. 4A;

[0039] FIG. 4C illustrates a perspective bottom view of the bone joint prosthesis of FIG. 4 A;

[0040] FIG. 4D illustrates a bottom view of the bone joint prosthesis of FIG. 4A;

[0041] FIG. 4E illustrates a side view of the bone joint prosthesis of FIG. 4A;

[0042] FIG. 4F illustrates a cross-sectional side view of the bone joint prosthesis taken along the line B-B in FIG. 4E;

[0043] FIG. 5A illustrates a perspective top view of a bone joint prosthesis, according to another embodiment of the present disclosure;

[0044] FIG. 5B illustrates a top view of the bone joint prosthesis of FIG. 5 A;

[0045] FIG. 5C illustrates a perspective bottom view of the bone joint prosthesis of FIG. 5 A;

[0046] FIG. 5D illustrates a bottom view of the bone joint prosthesis of FIG. 5 A;

[0047] FIG. 5E illustrates a side view of the bone joint prosthesis of FIG. 5 A;

[0048] FIG. 5F illustrates a cross-sectional side view of the bone joint prosthesis of FIG. 5E;

[0049] FIG. 6A illustrates a distal end view of a bone anchor, according to an embodiment of the present disclosure;

[0050] FIG. 6B illustrates a proximal end view of the bone anchor of FIG. 6A;

[0051] FIG. 6C illustrates a side view of the bone anchor of FIG. 6A;

[0052] FIG. 6D illustrates a cross-sectional side view of the bone anchor taken along the line C-C in FIG. 6C;

[0053] FIG. 7A illustrates a distal end view of a bone anchor, according to another embodiment of the present disclosure;

[0054] FIG. 7B illustrates a proximal end view of the bone anchor of FIG. 7A;

[0055] FIG. 7C illustrates a side view of the bone anchor of FIG. 7A;

[0056] FIG. 7D illustrates a cross-sectional side view of the bone anchor taken along the line D-D in FIG. 7C;

[0057] FIG. 8A illustrates a perspective top view of a retention member, according to an embodiment of the present disclosure;

[0058] FIG. 8B illustrates a perspective bottom view of the retention member of FIG. 8A:

[0059] FIG. 8C illustrates a side view of the retention member of FIG. 8A:

[0060] FIG. 8D illustrates a cross-sectional side view of the retention member taken along the lineE-E in FIG. 8C;

[0061] FIG. 9A illustrates a distal end view of a component fastener, according to an embodiment of the present disclosure:

[0062] FIG. 9B illustrates a proximal end view of the component fastener of FIG. 9 A;

[0063] FIG. 10 illustrates a side view of the assembled arthroplasty system of FIG. 2;

[0064] FIG. 11 illustrates a cross-sectional side view of the assembled arthroplasty system of FIG.10 taken along the line F-F:

[0065] FIG. 12 A illustrates a perspective distal end view of a glenoid drill guide, according to an embodiment of the present disclosure:

[0066] FIG. 12B illustrates a perspective proximal end view of the glenoid drill guide of FIG. 12 A;

[0067] FIG. 13A illustrates a perspective distal end view of a reamer tool, according to an embodiment of the present disclosure;

[0068] FIG. 13B illustrates a perspective proximal end view of the reamer tool of FIG. 13 A;

[0069] FIG. 14A illustrates a side view of a reamer tool, according to another embodiment of the present disclosure;

[0070] FIG. 14B illustrates a close-up distal end view of the reamer tool of FIG. 14A;

[0071] FIG. 15 A illustrates a perspective distal end view of an inserter tool, according to an embodiment of the present disclosure;

[0072] FIG. 15B illustrates a perspective proximal end view of the inserter tool of FIG. 15 A;

[0073] FIG. 16 illustrates a perspective view of a scapula bone with a glenoid cavity having a natural articular surface;

[0074] FIG. 17 illustrates the glenoid drill guide of FIG. 12A engaged with the glenoid cavity of the scapula bone;

[0075] FIG. 18 illustrates the glenoid drill guide of FIG. 17 with a drill bit placed through a first drill bit passageway of the glenoid drill guide:

[0076] FIG. 19 illustrates the glenoid drill guide of FIG. 17 with the drill bit placed through a second drill bit passagew ay of the glenoid drill guide;

[0077] FIG. 20 illustrates the reamer tool of FIG. 13 A placed over the drill bit to engage the glenoid cavity of the scapula bone;

[0078] FIG. 21 illustrates the reamer tool of FIG. 14A placed over the drill bit to engage the glenoid cavity of tire scapula bone;

[0079] FIG. 22 illustrates a close-up distal end view of the reamer tool of FIG. 21 engaged with the glenoid cavity of the scapula bone;

[0080] FIG. 23 illustrates the bone anchor of FIG. 6A and the bone joint prosthesis of FIG. 3A being installed onto a prepared glenoid cavity of the scapula bone with the inserter tool of FIG. 15 A;

[0081] FIG. 24 illustrates the bone anchor of FIG. 6A and the bone joint prosthesis of FIG. 4A being installed onto a prepared glenoid cavity of the scapula bone with the inserter tool of FIG. 15 A;

[0082] FIG. 25A illustrates a perspective front view of a humeral stem, according to an embodiment of the present disclosure;

[0083] FIG. 25B illustrates a perspective rear view of the humeral stem of FIG. 25 A;

[0084] FIG. 25C illustrates a view perpendicular to a bottom surface of a socket of the humeral stem of FIG. 25 A;

[0085] FIG. 25D illustrates a medial view of the humeral stem of FIG. 25 A;

[0086] FIG. 25E illustrates an anterior view of the humeral stem of FIG. 25 A;

[0087] FIG. 25F illustrates a lateral view of the humeral stem of FIG. 25 A;

[0088] FIG. 26A illustrates a perspective view of an articular component, according to another embodiment of the present disclosure; and

[0089] FIG. 26B illustrates a side view of the articular component of FIG. 26 A.

[0090] It is to be understood that the drawings are for purposes of illustrating the concepts of the present disclosure and may not be drawn to scale. Furthermore, the drawings illustrate exemplary’ embodiments and do not represent limitations to the scope of the present disclosure.DETAILED DESCRIPTION

[0091] Exemplary’ embodiments of the present disclosure will be best understood by reference to die drawings, wherein like parts are designated by like numerals throughout. It will be readily understood that the components of the present disclosure, as generally described and illustrated in the drawings, could be arranged and designed in a wide variety of different configurations. Thus, the following more detailed description of the embodiments of the devices, systems, and methods, as represented in the drawings, is not intended to limit the scope of the present disclosure but is merely representative of exemplary embodiments of the present disclosure.

[0092] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0093] Standard medical planes of reference and descriptive terminology are employed in this specification. While these terms are commonly used to refer to the human body, certain terms may also be applicable to physical objects in general.

[0094] A standard system of three mutually perpendicular reference planes is employed. A sagittal plane divides a body into right and left portions. A coronal plane divides a body into anterior and posterior portions. A transverse plane divides a body into superior and inferior portions. A mid-sagittal, mid-coronal, or mid-transverse plane divides a body into equal portions, which may be bilaterally symmetric. The intersection of the sagittal and coronal planes defines a superior-inferior or cephalad- caudal axis. The intersection of the sagittal and transverse planes defines an anterior-posterior axis. The intersection of the coronal and transverse planes defines a medial-lateral axis. The superior-inferior or cephalad-caudal axis, the anterior-posterior axis, and the medial-lateral axis are mutually perpendicular.

[0095] Anterior means toward the front of a body. Posterior means toward the back of a body. Superior or cephalad means toward the head. Inferior or caudal means toward the feet or tail. Medial means toward the midline of a body, particularly toward a plane of bilateral symmetry of the body. Lateral means away from the midline of a body or away from a plane of bilateral symmetry of the body. Axial means toward a central axis of a body. Abaxial means away from a central axis of a body. Ipsilateral means on the same side of the body. Contralateral means on the opposite side of the body. Proximal means toward the trunk of the body. Proximal may also mean toward a user or operator. Distal means away from the trunk. Distal may also mean away from a user or operator. Dorsal means toward the top of the foot. Plantar means toward the sole of the foot. Varus means outboard deviation of the knees (away from the sagittal plane) from the line between the hip and ankle, resulting in a “bowlegged” stance. Valgus means inboard deviation of the knees (toward the sagittal plane) from the line between tire hip and ankle, resulting in a “knock-kneed” stance.

[0096] FIGS. 1-11 illustrate various views of an example arthroplasty system and its components, according to embodiments of the present disclosure. Specifically, FIG. 1 shows an exploded view of die arthroplasty system; FIG. 2 shows the arthroplasty system assembled together; FIGS. 3A-3F show various views of an articular component 200 of the arthroplasty system; FIGS. 4A-4F show various views of a bone joint prosthesis or baseplate 300 of the arthroplasty system; FIGS. 5A-5F show various views of an alternative bone joint prosthesis or augmented baseplate 400 of the arthroplasty sy stem; FIGS. 6A-6D show various views of a bone anchor or bone screw 500 of the arthroplasty system; FIGS. 7A-7D show various views of an alternative bone anchor or post 520 of the arthroplasty system; FIGS. 8A-8D show various views of a retention member 510 of the arthroplasty' system; FIGS. 9A-9B show various views of a component fastener 590 or locking screw of the arthroplasty system; FIG. 10 shows a side view of the assembled arthroplasty system; and FIG. 11 shows a cross-sectional side view of the assembled arthroplasty system taken along the line F-F in FIG. 10.

[0097] FIGS. 3A-3F illustrate various views of the articular component 200, convex articular component, or glenoshpere, according to an embodiment of the present disclosure. Specifically, FIG.3A shows a perspective top view of the articular component 200; FIG. 3B shows a top view of the articular component 200; FIG. 3C shows a perspective bottom view of the articular component 200; FIG. 3D shows a bottom view of the articular component 200; FIG. 3E shows a side view of the articular component 200; and FIG. 3F shows a cross-sectional side view of the articular component 200.

[0098] The articular component 200 may be utilized with the baseplate 300 and / or the augmented baseplate 400 for a reverse shoulder arthroplasty procedure. Conversely, the articular component 200 may be utilized with a humeral stem for an anatomical shoulder arthroplasty procedure (e.g.. see the humeral stem 100 shown FIGS. 25A-25F). Likewise, a concave articular component (e.g., similar in shape to the concave articular component 1200 shown in FIGS. 26A-26B) may be utilized with the baseplate 300 and / or the augmented baseplate 400 for an anatomical shoulder arthroplasty procedure, and a concave articular component may also be utilized with a humeral stem for a reverse shoulder arthroplasty procedure.

[0099] In some embodiments, the articular component 200 may generally include: an articular surface or convex articular surface 222; an inferior beveled surface or beveled surface 240; a superior beveled surface 241; a female Morse taper, recess interconnection 232. or connection interface 230; a prosthesis-facing side or prosthesis-facing surface 233; a component passageway or access passageway 236 formed through the articular component 200; a component passagew ay thread or threaded portion 234 of the access passageway 236; a retention member cavity 250 portion of the access passageway 236; and an abutment surface or third abutment surface 203 of the access passageway 236.

[0100] In some embodiments, the convex articular surface 222 may comprise a hemispherical or semi-hemispherical shape.

[0101] In some embodiments, the convex articular surface 222 may be shaped to articulate with a glenoid cavity / socket or a glenoid implant (e.g., such as a concave articular component having a shape similar to that shown in FIGS. 26A-26B).

[0102] In some embodiments, the threaded portion 234 of the articular component 200 may be configured to couple w ith an insertion / removal tool (not shown) to place the articular component 200 on the bone joint prosthesis.

[0103] In some embodiments, the recess interconnection 232 may include a female Morse taper shape that may create a taper lock with a corresponding male taper shape of a bone joint prosthesis, such as the baseplate 300 or augmented baseplate 400 shown in FIGS. 4A-5F.

[0104] In other embodiments, the connection interface 230 may include a stem interconnection (not shown) with geometry shaped to removably couple the articular component 200 with the interior socket 122 inside the proximal body 110 of the humeral stem 100 shown in FIGS. 25A-25F.

[0105] In some embodiments, the stem interconnection may utilize the holes 124, 126, 128 of the humeral stem 100 to receive at least a portion of the stem interconnection.

[0106] In some embodiments, the articular component 200 may be interchangeable with a concave articular component (such as a concave articular component having a shape similar to that shown in FIGS. 26A-26B) to select between an anatomical or reverse shoulder arthroplasty procedure.

[0107] In some embodiments, the chamfered or beveled surface 240 may reduce unintended contact with surrounding soft tissues in a region of the articular component 200 that may be in limited contact with the convex articular surface 222.

[0108] FIGS. 4A-4F illustrate various views of the bone joint prosthesis, shoulder joint prosthesis, or baseplate 300, according to an embodiment of the present disclosure. Specifically, FIG. 4A shows a perspective top view of the baseplate 300; FIG. 4B shows a top view of the baseplate 300; FIG. 4C shows a perspective bottom view of the baseplate 300; FIG. 4D shows a bottom view of the baseplate 300; FIG. 4E shows a side view of the baseplate 300; and FIG. 4F shows a cross-sectional side view of the baseplate 300 taken along the line B-B in FIG. 4E.

[0109] In some embodiments, the baseplate 300 may generally include: a bone-facing surface or bone-facing side 310; a component-facing surface or superior side 320; an anchor passageway or central fastener passageway 330 formed therethrough; a tapered surface or first tapered surface 331 of the anchor passageway; an anchor passageway thread or threading 332 formed therein; one or more peripheral fastener passageways 340; one or more peripheral fastener passageway threads or retention features 350 formed therein; one or more instrument connection features or instrument passageways 360; and a male Morse taper or baseplate side surface 390.

[0110] In some embodiments, the bone-facing side 310 may include a surface having a convex shape, as shown in FIGS. 4E and 4F.

[0111] In some embodiments, the bone-facing side 310 may include a surface having a flat shape (not shown).

[0112] In some embodiments, the bone-facing side 310 may include a surface having a concave shape (not shown).

[0113] In some embodiments, the bone-facing side 310 may include a surface having a convex shape, a concave shape, and / or a flat shape, or any combinations thereof.

[0114] In some embodiments, the bone-facing side 310 may include one or more regions with specialized surface textures / coatings / structures (e.g., a rough or porous surface texture / coating. bone spikes, etc.). In some embodiments, the surface textures / coatings / structures may be conducive to bone in-growth / on-growth to promote long-term fixation to bone.

[0115] In some embodiments, the central fastener passageway 330 may be configured to receive a bone anchor therethrough (such as the bone screw 500 or the post 520) to secure the baseplate 300 to bone (e.g., such as the prepared glenoid cavity 580 of a scapula 570 bone shown in FIG. 23, etc.).

[0116] In some embodiments, the central fastener passageway 330 may also include the threading 332 to receive the retention member 510 therein (or a set screw, a locking cap, etc.) to lock / secure thebone screw 500 or post 520 to the baseplate 300 and prevent it from loosening or backing-out, etc., (e.g., see FIGS. 1, 10, and 11).

[0117] In some embodiments, the one or more peripheral fastener passageways 340 may be configured to receive additional fasteners or bone screws therethrough (not shown) to provide additional fixation of the baseplate 300 to the bone or prepared glenoid cavity 580.

[0118] In some embodiments, the retention features 350 may be configured to prevent loosening / backing-out of the additional fasteners from the one or more peripheral fastener passageways 340.

[0119] FIGS. 5A-5F illustrate various views of the bone joint prosthesis, shoulder joint prosthesis, or augmented baseplate 400, according to another embodiment of the present disclosure. Specifically, FIG. 5A shows a perspective top view of the augmented baseplate 400; FIG. 5B shows a top view of the augmented baseplate 400; FIG. 5C shows a perspective bottom view of the augmented baseplate 400; FIG. 5D shows a bottom view of the augmented baseplate 400; FIG. 5E shows a side view of the augmented baseplate 400; and FIG. 5F shows a cross-sectional side view of the augmented baseplate 400.

[0120] In some embodiments, the augmented baseplate 400 may generally include: a bone-facing surface or bone-facing side 410; a component-facing surface or superior side 420; an anchor passageway or central fastener passageway 430 formed therethrough; a tapered surface or first tapered surface 431 of the anchor passageway; an anchor passageway thread or threading 432 formed therein; one or more peripheral fastener passageways 440; one or more peripheral fastener passageway threads or retention features 450 formed therein; one or more instrument connection features or instrument passageways 460; a male Morse taper or augmented baseplate side surface 490; an augmented portion 470; and a notch 480 formed therein;

[0121] In some embodiments, the bone-facing side 410 may include a surface having a convex shape, a concave shape, and / or a flat shape, or any combinations thereof.

[0122] In some embodiments, the bone-facing side 410 may include one or more regions with specialized surface textures / coatings / structures (e.g., a rough or porous surface texture / coating, bone spikes, etc.). In some embodiments, the surface textures / coatings / structures may be conducive to bone in-growth / on-growth to promote long-term fixation to bone.

[0123] In some embodiments, the central fastener passageway 430 may be configured to receive a bone anchor therethrough (such as the bone screw 500 or the post 520) to secure the augmented baseplate 400 to bone (e.g., such as the prepared glenoid cavity 580 of the scapula 570 bone shown in FIG. 24, etc.).

[0124] In some embodiments, the central fastener passageway 430 may also include threading 432 therein configured to receive the retention member 510 (or a set screw, a locking cap, etc.) to lock / secure the bone screw 500 or post 520 to the augmented baseplate 400 and prevent it from loosening or backing-out, etc., (e.g., see FIGS. 1, 10, and 1 1).

[0125] In some embodiments, the one or more peripheral fastener passageways 440 may be configured to receive additional fasteners or bone screws therethrough (not shown) to provide additional fixation of the augmented baseplate 400 to the bone or prepared glenoid cavity 580.

[0126] In some embodiments, the retention features 450 may be configured to prevent loosening / backing-out of the additional fasteners from the one or more peripheral fastener passageways 440.

[0127] FIGS. 6A-6D illustrate various views of a bone anchor, shoulder bone anchor, or bone screw 500, according to an embodiment of the present disclosure. Specifically, FIG. 6A shows a distal end view of a the bone screw 500; FIG. 6B shows a proximal end view of the bone screw 500; FIG. 6C shows a side view of the bone screw 500; and FIG. 6D shows a cross-sectional side view of the bone screw 500.(00128] In some embodiments, the bone screw 500 may generally include: a bone screw shaft 508 extending between a proximal end 504 and a distal end 505 of the bone screw; a bone screw thread 509 disposed about the bone screw shaft 508; a self-tapping feature 531 formed in the bone screw shaft 508; a bone screw head 503; a first connection feature 506 formed in / on the bone screw head 503; a torque connection interface 532 formed in / on the bone screw head 503; an abutment surface or first abutment surface 501 on the bone screw head 503; and a tapered surface or second tapered surface 502 on the bone screw head 503.

[0129] In some embodiments, the first connection feature 506 of the bone screw 500 may include a recess or hole formed in the bone screw head 503 including an inner bone screw thread 507 formed therein. However, it will be understood that the first connection feature 506 of the bone screw 500 may comprise any feature(s) suitable to couple the bone screw 500 to a component fastener.

[0130] FIGS. 7A-7D illustrate various views of a bone anchor, shoulder bone anchor, or post 520, according to another embodiment of the present disclosure. Specifically, FIG. 6A shows a distal end view of a the post 520; FIG. 6B shows a proximal end view of the post 520; FIG. 6C shows a side view of the post 520; and FIG. 6D shows a cross-sectional side view of the post 520.

[0131] In some embodiments, the post 520 may generally include: a post shaft 529 extending between a proximal end 524 and a distal end 525 of the post 520; a post head 523; a first connection feature 526 formed in / on the post head 523; a torque connection interface 528 formed in / on the post head 523 ; an abutment surface or first abutment surface 521 on the post head 523 ; and a tapered surface or second tapered surface 522 on the post head 523.

[0132] In some embodiments, the first connection feature 526 of the post 520 may include a recess or hole formed in the post head 523 including an inner post thread 527 formed therein. However, it will be understood that the first connection feature 526 of the post 520 may comprise any feature(s) suitable to couple the post 520 to a component fastener.

[0133] FIGS. 8A-8D illustrate various views of the set screw, locking cap, or retention member 510, according to an embodiment of the present disclosure. Specifically, FIG. 8A shows a perspectivetop view of the retention member 510; FIG. 8B shows a perspective bottom view of the retention member 510; FIG. 8C shows a side view of the retention member 510; and FIG. 8D shows a cross- sectional side view of the retention member 510.

[0134] In some embodiments, the retention member 510 may generally include: a retention member head 515; a torque connection interface 514 formed in / on the retention member head 515; a retention member passageway 511 formed through the retention member 510; and a distal abutment surface or second abutment surface 512 on the retention member 510.

[0135] In some embodiments, the retention member 510 may also include a retention member thread 513 to couple the retention member 510 to a component passageway of a bone joint prosthesis. However, it will be understood that the retention member 510 may comprise any feature(s) suitable to couple the retention member 510 to a bone joint prosthesis.(00136] FIGS. 9A and 9B show proximal and distal end views of a locking screw or component fastener 590, according to an embodiment of the present disclosure.

[0137] In some embodiments, the component fastener 590 may generally include: a component fastener shaft 598 extending between a proximal end 591 and a distal end 592; a component fastener head 593 at the proximal end 591 of the component fastener shaft 598; a torque connection interface 597 formed in / on the component fastener head 593; an abutment surface or fourth abutment surface 594 on the component fastener head 593; and a connection feature or second connection feature 595 at the distal end 592 of the component fastener 590.

[0138] In some embodiments, the second connection feature 595 may comprise a component fastener thread 596 disposed about at least a portion of the distal end 592 of the component fastener shaft 598. However, it will be understood that the second connection feature 595 may comprise any feature(s) suitable to couple the distal end 592 of the component fastener 590 to the proximal end of a bone anchor.

[0139] FIGS. 10 and 11 show a side view and a cross-sectional side view of an assembled arthroplasty system, according to an example of the present disclosure. The arthroplasty system may include a bone joint prosthesis (e.g., a shoulder joint prosthesis, etc., such as the baseplate 300, the augmented baseplate 400, or the humeral stem 100), a bone anchor (e.g., the bone screw 500, the post 520, etc.), a retention member (e.g., a set screw, a locking cap, the retention member 510, etc.), an articular component with a concave or convex articular surface (e.g., see FIGS. 3A-3F, 26A-26B, etc.), and a component fastener (e.g., a locking screw, a component fastener 590, etc.).

[0140] With reference to the specific example shown in FIG. 1 1, the bone joint prosthesis may include the baseplate 300 configured to engage a bone of a bone joint (e.g., a prepared glenoid cavity 580 of a scapula 570) with the bone-facing surface or bone-facing side 310 of the baseplate 300. A component passageway or access passageway 236 may be formed through the baseplate 300 intermediate the bone-facing surface and a component-facing surface of the baseplate 300. The bone anchor (e.g., the bone screw 500, the post 520, etc.) may be receivable through the anchor passagewayto secure the bone joint prosthesis to the bone. The retention member may then be coupled to the baseplate 300 to retain the bone anchor within the anchor passageway of the baseplate 300 and prevent the bone anchor from backing out. The prosthesis-facing surface / side of the articular component 200 may then be coupled to the component-facing surface or superior side 320 of the baseplate 300 and secured in place by the component fastener 590. For example, the component passageway formed through the articular component 200 may receive the component fastener 590 therein, such that, the component fastener: (1) couples within the component passageway of the articular component; (2) extends through a retention member passageway formed through the retention member; and (3) couples to the bone anchor to secure the articular component 200 to the baseplate 300.

[0141] In some embodiments, the anchor passageway or access passageway 236 formed through the baseplate 300 may include a first tapered surface 331, and a head of the bone anchor may include a second tapered surface (e.g., see the second tapered surface 502 of the bone screw 500, the second tapered surface 522 of the post 520, etc.) which may be configured to engage the first tapered surface 331 of the anchor passageway to secure the baseplate 300 to the bone. In this manner, the tapered surfaces on the bone anchor and the baseplate 300 may engage each other while allowing the bone anchor to independently rotate with respect to the baseplate 300 as the bone anchor is rotationally inserted into a bone.

[0142] Once the bone anchor and baseplate 300 have been attached to the bone, the bone anchor may be prevented from backing out of the bone and / or the component passageway of by inserting the retention member 510 into the component passageway to prevent the bone anchor from backing out.

[0143] In some embodiments, the anchor passageway formed through the baseplate 300 may include the anchor passageway thread or threading 332, and the retention member 510 may include the retention member thread 513 configured to engage the anchor passageway thread and couple the retention member 510 to the baseplate 300.

[0144] In some embodiments, the bone anchor comprises a first abutment surface (e.g., sec the first abutment surface 501 of the bone screw 500, the first abutment surface 521 of the post 520, etc.), and the retention member 510 comprises a second abutment surface 512 configured to engage the first abutment surface of the bone anchor and impart a force thereon to retain the bone anchor within the anchor passageway.

[0145] In some embodiments, a proximal end of the bone anchor comprises a first connection feature (e.g., 506, 526, etc.), and a distal end of the component fastener 590 comprises a second connection feature 595 configured to couple with the first connection feature of the bone anchor to couple the component fastener 590 with the bone anchor. For example, in some embodiments the first connection feature may include an inner bone anchor thread (e.g., see the inner bone screw thread 507 of the bone screw 500, the inner post thread 527 of the post 520, etc.), and the second connection feature 595 of the component fastener 590 may include a component fastener thread 596 configured to engage the inner bone anchor thread to couple the component fastener 590 with the bone anchor.

[0146] In some embodiments, the articular component 200 may include a third abutment surface 203, and the component fastener 590 may include a fourth abutment surface 594 configured to engage the third abutment surface 203 of the articular component 200 and impart a force thereon to secure the articular component 200 to the baseplate 300.

[0147] FIGS. 12A-24 illustrate various instruments and procedure steps for preparing a scapula 570 to receive the baseplate 300 of FIGS. 4A-4F and / or the augmented baseplate 400 of FIGS. 5A-5F.

[0148] FIGS. 12A and 12B illustrate distal and proximal end views of a glenoid drill guide 1300, according to an embodiment of the present disclosure. The glenoid drill guide 1300 may generally include a proximal end 1301 comprising a handle 1310 with at least one pin or drill bit passageway formed therethrough, an intermediate shaft portion 1320, and a distal end 1302 comprising a glenoidfacing surface 1350 with one or more fixation members 1330 projecting therefrom and a central hole 1360 formed therethrough.

[0149] In some embodiments, the handle 1310 may include a first drill bit passageway 1341 formed therethrough and configured to guide a guide wire or drill bit 550 along a first trajectory (e.g., a zero degree offset) through the handle 1310, through the intermediate shaft portion 1320, and out of the central hole 1360 formed in the glenoid-facing surface 1350.

[0150] In some embodiments, the handle 1310 may include a second drill bit passageway 1342 formed therethrough and configured to guide a drill bit 550 along a second trajectory (e.g., a 10 degree offset) through the handle 1310, through a distal part of the intermediate shaft portion 1320, and out of the central hole 1360 formed in the glenoid-facing surface 1350.

[0151] In some embodiments, the handle 1310 may include more than two drill bit passageways formed therethrough (not shown) and configured to guide a drill bit 550 along more than two trajectories (e.g., at 0, 5, 10, 15, 20 degree offsets, etc.) and out the central hole 1360 formed in the glenoid-facing surface 1350.

[0152] In some embodiments, the first trajectory of the first drill bit passageway 1341 may be oriented at about zero degrees with respect to the central hole 1360 and / or the glenoid-facing surface 1350.

[0153] In some embodiments, the second trajectory of the second drill bit passageway 1342 may be oriented at about ten degrees with respect to the central hole 1360 and / or the glenoid-facing surface 1350.

[0154] However, it will be understood that any drill bit passageway may be formed through the handle 1310 that may include any trajectory between -90 degrees and + 90 degrees with respect to the central hole 1360 and / or the glenoid-facing surface 1350.

[0155] In some embodiments, the one or more fixation members 1330 may comprise one or more spikes, barbs, pegs, etc., that project from the glenoid- facing surface 1350 of the glenoid drill guide 1300.

[0156] FIGS. 13A and 13B illustrate distal and proximal end views of a reamer tool 1400, according to an embodiment of the present disclosure. The reamer tool 1400 may generally include a reamer head 1410 comprising one or more cutting features 1415, a reamer shaft 1420, and a torque connection interface 1430. In some embodiments, the reamer tool 1400 may be cannulated to receive the drill bit 550 or a guide wire therethrough.

[0157] FIGS. 14A and 14B illustrate side views of an offset reamer tool 1500, according to another embodiment of the present disclosure. The offset reamer tool 1500 may generally include an offset reamer head 1510 comprising one or more cutting features 1515, a sleeve 1520, a handle 1530, a reamer shaft 1540, and a polyaxial torque connection interface 1550 between the reamer shaft 1540 and the offset reamer head 1510.(00158] In some embodiments, an angle of the offset reamer head 1510 with respect to the reamer shaft may be fixed.

[0159] In some embodiments, an angle of the offset reamer head 1510 with respect to the reamer shaft may be adjustable.

[0160] In some embodiments, an angle of the offset reamer head 1510 with respect to the reamer shaft may be fixed at any angle between -90 degrees and +90 degrees.

[0161] In some embodiments, an angle of the offset reamer head 1510 with respect to the reamer shaft may be adjustable to any angle between -90 degrees and +90 degrees.

[0162] In some embodiments, the offset reamer tool 1500 may be cannulated to receive the drill bit 550 or a guide wire therethrough.

[0163] FIGS. 15A and 15B illustrate distal and proximal end views of an inserter tool 1600, according to an embodiment of the present disclosure. The inserter tool 1600 may generally include a proximal end 1601, a distal end 1602, an anchor driver 1610 having a torque connection interface 1615 at its distal end, an inner sheath 1620 having an inner sheath thread 1625 disposed about its distal end, an outer sheath 1630 having one or more projections 1635, an inserter pin 1640, an inner sheath dial 1650, and an inserter handle 1660.

[0164] FIGS. 16-24 illustrate various views of a procedure utilizing the instruments shown in FIGS. 12A-15B to prepare a glenoid cavity 571 for implanting the baseplate 300 and / or the augmented baseplate 400 thereon.

[0165] FIG. 16 shows the scapula 570 with the an unprepared or natural articular surface 572 of the glenoid cavity 571.

[0166] In a first step of the procedure, the glenoid-facing surface 1350 of the glenoid drill guide 1300 may be placed against the glenoid cavity 571 of the scapula 570, as shown in FIG. 17. In some embodiments, one or more fixation members 1330 projecting from the glenoid-facing surface 1350 may be pressed into the glenoid cavity 571 to help couple / stabilize the glenoid drill guide 1300 with respect to the glenoid cavity 571.

[0167] In a second step of the procedure, a drill bit 550 may be inserted through one of the drill bit passageways formed through the handle 1310 of the glenoid drill guide 1300. For example, the drill bit 550 may be inserted through the first drill bit passageway 1341 formed through the handle 1310 of the glenoid drill guide 1300 along a first trajectory into the glenoid cavity 571 (e.g., see FIG. 18). In some embodiments, the first trajectory may be oriented at about zero degrees with respect to a central hole 1360 and / or a glenoid-facing surface 1350 of the glenoid drill guide 1300. Alternatively, the drill bit 550 may be inserted through the second drill bit passageway 1342 formed through the handle 1310 of the glenoid drill guide 1300 along a second trajectory into the glenoid cavity 571 (e.g., see FIG. 19). In some embodiments, the second trajectory may be oriented at about ten degrees with respect to a central hole 1360 and / or a glenoid-facing surface 1350 of the glenoid drill guide 1300.

[0168] In a third step of the procedure (e.g., see FIG. 20), the glenoid drill guide 1300 may be removed from the drill bit 550, the reamer tool 1400 may be placed over the drill bit 550, and the reamer tool 1400 may be utilized to ream the glenoid cavity 571 and form the prepared glenoid cavity 580 (e.g., see FIGS. 23 or 24). Alternatively, the glenoid drill guide 1300 may be removed from the drill bit 550, the offset reamer tool 1500 may be placed over the drill bit 550 (e.g., see FIGS. 21 and 22), and the offset reamer tool 1500 may be utilized to ream the glenoid cavity and form the prepared glenoid cavity 580.

[0169] In a fourth step of the procedure, the reamer tool and drill bit 550 may be removed from the prepared glenoid cavity 580, and the inserter tool 1600 may be utilized to rotate the bone screw 500 into a pilot hole 574 formed in the prepared glenoid cavity 580 along the desired trajectory to implant the baseplate 300 or augmented baseplate 400 on the prepared glenoid cavity 580 (see FIGS. 23 and 24).

[0170] FIGS. 25A-25F show various views of an example humeral implant or humeral stem 100 that may be utilized with the articular components, bone anchors, retention members, and component fasteners described or contemplated herein.

[0171] Referring to FIGS. 25A-25F, the humeral stem 100 may include a proximal body 110 and a distal shaft 112. In an embodiment, the distal shaft 112 may be integrally formed with the proximal body 110 to form a one-piece humeral stem. However, in other embodiments the distal shaft 112 and proximal body 110 may be removably couplable with each other. The shaft of the humeral stem 100 may include a distal end 12, a proximal end 11, and a middle portion 14.

[0172] The proximal body 110 may have a convex hemispherical exterior shape and an interior socket 122 with features shaped to receive an articular component, such as a concave articular component (e.g., similar in shape to that shown in FIGS. 26A-B) or a convex articular component (e.g., similar to that shown in FIGS. 4A-4F). The interior socket 122 may include a bottom surface 146 which may be parallel to a proximal rim 148 of the proximal body 110. The interior socket 122 may be referred to as an articular component interconnection or interface. One or more holes may extend through the proximal body 1 10 (e.g., see holes 124, 126, 128, 130, etc.). Holes 124, 126, 128 are shown with non-circular cross-sectional shapes which may be based upon the geometry of the corresponding ridges 116, 117 and grooves 118, 119 in the vicinity of the holes. Hole 130 is shown with a circular cross-sectional shape (see FIG. 25C) and may be internally threaded. The holes 124, 126, 128, and / or 130 may provide means or openings for inserting instruments to aid in removing or extracting the implant from the bone after implantation. Holes 124, 126, 128 may enhance rotational stability of the humeral stem 100, initially due to their distal edges digging into adjacent bone, and long-term due to bone growth proximally into the holes to the extent permitted by the articular component. Additionally, or optionally, hole 130 may be included in an inserter interconnection or interface of the interior socket 122 for connection to an inserter instrument (not shown) for inserting and / or impacting the humeral stem 100 into a bone, such as a proximal humerus, or as an anchor passageway including an anchor passageway thread therein, as previously described above with respect to FIGS. 4A-5F. A medial blind hole 152 may extend into the bottom surface 146 and partway through the proximal body 1 10. A medial tab 154 may project from the bottom surface 146 and / or from an inner wall of the interior socket 122. The medial tab 154 may engage with a corresponding groove in an articular component placed within the interior socket 122 to enhance rotational stability.

[0173] The distal shaft 112 may extend distally from the exterior of the proximal body 110 to terminate at a free end 150 at the distal end 12. The distal shaft 112 may start out the same size or similar in size to the proximal body and may become smaller farther from the proximal body, towards the distal end 12. In other words, the distal shaft 112 may have a larger overall outer diameter at or near proximal body 110 and a smaller overall outer diameter farther from the proximal body, near the free end 150. The distal shaft 112 may include alternating longitudinal ridges and longitudinal grooves. The ridges may be described as arms, bars, beams, branches, columns, cylinders, fms, legs, limbs, lobes, pillars, rails, ribs, shafts, struts, or other geometrical shapes. This arrangement may enhance rotational stability along most or all of the length of the distal shaft 112 when the humeral stem 100 is implanted in a proximal humerus. The distal shaft 112 of humeral stem 100 shown has three ridges and three grooves, although any number of ridges and grooves may be present. The illustrated arrangement of three ridges and three grooves gives the distal shaft 112 a cross-sectional shape that may be described as tri-lobed, triangular, or Y-shaped. A medial ridge 116 and two oblique-lateral ridges 117 are shown (e.g., an antero-lateral ridge and a postero-lateral ridge). Each ridge 1 16, 117 may have a rectangular cross-sectional profile which may have its longest dimension oriented radially outwardly relative to a longitudinal centerline 132. The medial ridge 1 16 may include a superimposed longitudinal groove 158. Holes 160 may extend through the ridges 116, 1 17 near the proximal body 1 10. Sutures, cables, or other lines may be routed through the holes 160 to re-attach soft tissues or bone fragments to the humerus. A lateral groove 118 and two oblique-medial grooves 1 19 are shown (e.g., an antero-medial groove and a postero-medial groove). The ridges 116, 117 may merge together along some or all of the length of the distal shaft 112 to form a central longitudinal solid portion 120. The central longitudinal solid portion 120 may track along, or may define, the longitudinal centerline 132. The longitudinal centerline 132may be straight or linear, or it may be curved, bent, irregular, and so on. Referring to FIG. 25E, at least the distal portion of the longitudinal centerline 132 may be straight or linear in a posterior (or anterior) view. Referring to FIGS. 25D and 25F, the entire longitudinal centerline 132 may be straight or linear in medial and / or lateral views.

[0174] Each ridge 116, 117 may extend transversely away from the longitudinal centerline 132 at a first distance near the proximal body 110 and a second distance farther from the proximal body (e.g., closer to the free end). For each ridge 116, 117 the second distance may be less than the first distance. The ridges 116, 117 and / or grooves 118, 1 19 may also be wider near the proximal end 10 of the distal shaft 112 and narrower near the distal end 12. The proximal and distal distances and / or the proximal and distal transverse widths for each ridge 116, 117 may be the same as, or different from, the corresponding proximal and distal distances of the other ridges of the distal shaft 1 12. In the example shown, with three ridges 1 16, 117, there may be three unique proximal distances, three unique distal distances, three unique proximal transverse widths, and / or three unique distal transverse widths. In the example shown, the antero- lateral and postero-lateral ridges 117 may be identical mirror images of each other, while the medial ridge 1 16 may be different from the ridges 1 17. The differences may be more pronounced near the proximal body 1 10. Optionally, the distal distances may be equal and / or the distal widths may be equal.

[0175] Referring to FIG. 25E, humeral stem 100 may include one or more regions with specialized surface structure, and / or one or more different types of surface structure. A first surface structure region 162 may be on the exterior of the proximal body 110, in other words, proximal to dashed line 164. A second surface structure region 166 may be on the proximal end of the distal shaft 112, in other words, between dashed lines 164 and 168. Preferably, the first surface structure region 162 may include a rough structure suitable to provide initial stability when the proximal body 110 is impacted into a prepared bone socket, and the second surface structure region 166 may include a surface structure conducive to bone in-growth / on-growth to promote long-term fixation. The location and extent of the first and second surface structure regions 162, 166 may be specified so as to achieve particular short and long tern fixation objectives.

[0176] FIGS. 26A and 26B show perspective and side views of an example concave articular component 1200 or trial component that may be utilized with the bone joint prostheses described or contemplated herein. The concave articular component 1200 may generally include a proximal end 1201 comprising a concave articular surface 1210, and a distal end 1202 which may (or may not) include a post 1220. The concave articular component 1200 may be modified in any manner to couple with any of the bone joint prostheses described or contemplated herein and form a desired anatomic or reverse arthroplasty system.

[0177] Any procedures or methods disclosed herein may comprise one or more steps or actions for performing the described method. The method steps and / or actions may be interchanged with oneanother. In other words, unless a specific order of steps or actions is required for proper operation of the embodiment, the order and / or use of specific steps and / or actions may be modified.

[0178] It will be understood that any of the devices, systems, and / or instruments that are described or contemplated herein may be combined in any manner to produce any number of different surgical kits.

[0179] Reference throughout this specification to "an embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with that embodiment is included in at least one embodiment. Thus, the quoted phrases, or variations thereof, as recited throughout this specification are not necessarily all referring to the same embodiment.

[0180] Similarly, it should be appreciated that in the above description of embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the present disclosure. This method of disclosure, however, is not to be interpreted as reflecting an intention that any embodiment requires more features than those expressly recited in that embodiment. Rather, inventive aspects lie in a combination of fewer than all features of any single foregoing disclosed embodiment.

[0181] Recitation of the term "first" with respect to a feature or element does not necessarily imply the existence of a second or additional such feature or element. Elements recited in means-plus-function format are intended to be construed in accordance with 35 U.S.C. § 1 12. It will be apparent to those having skill in the art that changes may be made to the details of the above -described embodiments without departing from the underlying principles set forth herein.

[0182] The phrases "connected to", "coupled to", "engaged with", and "in communication with" may refer to any form of interaction between two or more entities, including mechanical, electrical, magnetic, electromagnetic, fluid, and thermal interaction. Two components may be functionally coupled to each other even though they are not in direct contact with each other. The term "coupled" can include components that arc coupled to each other via integral formation (c.g., integrally formed as a single piece, etc.), components that are removably and / or non-removably coupled with each other, components that are functionally coupled to each other through one or more intermediary components, etc. The term "abutting" refers to items that may be in direct physical contact with each other, although the items may not necessarily be attached together. The phrase "fluid communication" refers to two or more features that are connected such that a fluid within one feature is able to pass into another feature. As defined herein the term "substantially" means within + / - 20% of a target value, measurement, or desired characteristic.

[0183] While specific embodiments and applications of the present disclosure have been illustrated and described, it is to be understood that the scope of the present disclosure is not limited to the precise configurations and components disclosed herein. Various modifications, changes, and variations which will be apparent to those skilled in the art may be made in the arrangement, operation, and details of the devices, systems, and methods disclosed herein.

Claims

CLAIMSWhat is claimed is:

1. An arthroplasty system comprising: a bone joint prosthesis configured to engage a bone of a bone joint comprising: a bone-facing surface; a component-facing surface opposite the bone-facing surface: and an anchor passageway formed through the bone joint prosthesis intermediate the bonefacing surface and the component-facing surface; a bone anchor receivable through the anchor passageway to secure the bone joint prosthesis to the bone; a retention member couplable with the bone joint prosthesis to retain the bone anchor within the anchor passageway; an articular component couplable with the bone joint prosthesis comprising: an articular surface configured to replace a natural articular surface of the bone joint; a prosthesis-facing surface engageable with the component-facing surface of the bone joint prosthesis; and a component passageway formed through the articular component intermediate the articular surface and the prosthesis-facing surface; and a component fastener configured to secure the articular component to the bone joint prosthesis, wherein, when the arthroplasty system is assembled, the component fastener: couples within the component passageway of the articular component; extends through a retention member passageway formed through the retention member; and couples to the bone anchor to secure the articular component to the bone joint prosthesis.

2. The arthroplasty system of claim 1, wherein: the anchor passageway formed through the bone joint prosthesis comprises a first tapered surface; and a head of the bone anchor comprises a second tapered surface configured to engage the first tapered surface of the anchor passageway to secure the bone joint prosthesis to the bone.

3. The arthroplasty system of claim 1, wherein: the bone anchor comprises a first abutment surface; and the retention member comprises a second abutment surface configured to engage the first abutment surface of the bone anchor and impart a force thereon to retain the bone anchor within the anchor passageway.

4. The arthroplasty system of claim 1. wherein:the anchor passageway formed through the bone joint prosthesis comprises an anchor passageway thread; and the retention member comprises a retention member thread configured to engage the anchor passageway thread and couple the retention member with tire bone joint prosthesis.

5. The arthroplasty system of claim 1, wherein: a proximal end of the bone anchor comprises a first connection feature; and a distal end of the component fastener comprises a second connection feature configured to couple with the first connection feature to couple the component fastener with the bone anchor.

6. The arthroplasty system of claim 5, wherein: the first connection feature comprises an inner bone anchor thread; and the second connection feature comprises a component fastener thread configured to engage the inner bone anchor thread to couple the component fastener with the bone anchor.

7. The arthroplasty system of claim 1. wherein: the articular component comprises a third abutment surface; and the component fastener comprises a fourth abutment surface configured to engage the third abutment surface of the articular component and impart a force thereon to secure the articular component to the bone joint prosthesis.

8. An arthroplasty system for replacing a natural articular surface of a shoulder joint comprising: a shoulder joint prosthesis configured to engage a bone of the shoulder joint comprising: a bone -facing surface; a component-facing surface opposite the bone-facing surface; and an anchor passageway formed through the shoulder joint prosthesis intermediate the bone-facing surface and the component-facing surface; a shoulder bone anchor receivable through the anchor passageway to secure the shoulder joint prosthesis to the bone; a retention member couplable with the shoulder joint prosthesis to retain the shoulder bone anchor within the anchor passageway; an articular component couplable with the shoulder joint prosthesis comprising: an articular surface configured to replace the natural articular surface of the shoulder joint; a prosthesis-facing surface engageable with the component-facing surface of the shoulder joint prosthesis; and a component passageway formed through the articular component intermediate the articular surface and the prosthesis-facing surface; and a component fastener configured to secure the articular component to the shoulder joint prosthesis, wherein, when the arthroplasty system is assembled, the component fastener: couples within the component passageway of the articular component;extends through a retention member passageway formed through the retention member; and couples to the shoulder bone anchor to secure the articular component to the shoulder joint prosthesis.

9. The arthroplasty system of claim 8, wherein the shoulder bone anchor comprises at least one of: a bone screw; and a post.

10. The arthroplasty system of claim 8, wherein the shoulder joint prosthesis comprises at least one of: a baseplate; an augmented baseplate; and a humeral stem.

11. The arthroplasty system of claim 8. wherein the articular component comprises at least one of: a convex articular component comprising a convex articular surface; and a concave articular component comprising a concave articular surface.

12. The arthroplasty system of claim 8, wherein: the anchor passageway formed through the shoulder joint prosthesis comprises an anchor passageway thread; and the retention member comprises a retention member thread configured to engage the anchor passageway thread to couple the retention member with the shoulder joint prosthesis.

13. The arthroplasty’ system of claim 8, wherein: a proximal end of the shoulder bone anchor comprises a first connection feature; and a distal end of the component fastener comprises a second connection feature configured to couple with the first connection feature to couple the component fastener with the shoulder bone anchor.

14. The arthroplasty system of claim 13, wherein: the first connection feature comprises an inner shoulder bone anchor thread; and the second connection feature comprises a component fastener thread configured to engage the inner shoulder bone anchor thread to couple the component fastener with the shoulder bone anchor.

15. A surgical kit comprising : at least one bone joint prosthesis configured to engage a bone of a bone joint comprising: a bone-facing surface; a component-facing surface opposite the bone-facing surface; and an anchor passageway formed through the at least one bone joint prosthesis intermediate the bone-facing surface and the component-facing surface: at least one bone anchor configured to be received through the anchor passageway to secure the at least one bone joint prosthesis to the bone;at least one retention member couplable with the at least one bone joint prosthesis to retain the at least one bone anchor within the anchor passageway; at least one articular component couplable with the at least one bone joint prosthesis comprising: an articular surface configured to replace a natural articular surface of the bone joint; a prosthesis-facing surface engageable with the component-facing surface of the bone joint prosthesis; and a component passageway fonned through the at least one articular component intermediate the articular surface and the prosthesis-facing surface; and at least one component fastener configured to secure the at least one articular component to the at least one bone joint prosthesis, wherein the at least one component fastener is configured to: couple within the component passageway of the at least one articular component; extend through a retention member passageway formed through the at least one retention member; and couple to the bone anchor to secure the at least one articular component to the at least one bone joint prosthesis.

16. The surgical kit of claim 15, wherein the at least one bone anchor comprises at least one of: a bone screw; and a post.

17. The surgical kit of claim 15, wherein the at least one bone joint prosthesis comprises at least one of: a baseplate; an augmented baseplate; and a humeral stem.

18. The surgical kit of claim 15, wherein the at least one articular component comprises at least one of: a convex articular component comprising a convex articular surface; and a concave articular component comprising a concave articular surface.

19. The surgical kit of claim 15, wherein the at least one retention member comprises at least one set screw.

20. The surgical kit of claim 15, wherein the at least one component fastener comprises at least one locking screw.

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