Metal-backed patellar component for orthopaedic knee prostheses and associated manufacturing method

Abstract

An orthopedic implant comprising a knee bone component (10) having a metal base (14) with a polymer bearing (12) molded thereon. The metal base includes a posterior base surface (16) provided with a dimple (30) and an anterior base surface (22) having a plurality of pegs (24) configured to be implanted into the patient's natural knee bone, the anterior base surface and the pegs being coated with a porous metal. A method for manufacturing a knee bone component is also disclosed.

Description

TECHNICAL FIELD

[0001] The present disclosure relates generally to an implantable orthopaedic knee prosthesis, and more particularly to an implantable patellar component of an orthopaedic knee prosthesis. BACKGROUND

[0002] During a patient's lifetime, it can be necessary to perform a joint replacement procedure on the patient due to, for example, disease or trauma. A joint replacement procedure can involve the use of a prosthesis implanted in one or more of the patient's bones. In the case of a knee replacement procedure, an orthopaedic prosthesis is implanted into the patient's patella. Specifically, a prosthetic patellar component is secured to the patient's natural patella such that its posterior surface interfaces with a femoral component during extension and flexion of the knee joint.

[0003] Conventional dome patellar components are embodied as dome polymer bearings. Other types of patellar components include conforming or anatomic bearings, which are designed to conform to the bearing surface of the femur. Dome patellar components allow for greater movement between the patellar component and the femoral component of the knee prosthesis, while anatomic patellar components are more constrained relative to the femoral component. Both types of patellar components have clinical benefits to suit the needs of a given surgical procedure. SUMMARY

[0004] According to one aspect of the present disclosure, an orthopaedic implant includes a patellar component. The patellar component has a solid-metal base including a posterior base surface having a plurality of dimples formed therein. Each of the dimples has an undercut formed therein. The solid-metal base also has an anterior base surface with a plurality of pegs extending outwardly therefrom. A porous metal coating is disposed on the anterior base surface and the pegs of the solid-metal base. A polymer bearing is molded to the posterior base surface of the solid-metal base. The polymer bearing has a posterior bearing surface configured to interface with a pair of femoral condyles of a femoral component.

[0005] In one embodiment, the polymer bearing is molded into the dimples of the solid-metal base.

[0006] Illustratively, a posterior end of each of the dimples is defined by an opening formed in the posterior base surface, wherein an anterior end of each of the dimples is defined by a base wall spaced forwardly from the opening. Medial and lateral sides of the dimples are defined by a pair of sidewalls extending from the opening to the base wall. The sidewalls have an undercut formed therein.

[0007] In one embodiment, a surface of the sidewall defining the undercut has a rounded surface.

[0008] Illustratively, a plurality of adjacent dimples of the solid-metal base are open to one another.

[0009] In one embodiment, the solid-metal base further includes a perimeter sidewall extending between the posterior base surface and the anterior base surface. The perimeter sidewall has a plurality of dimples formed therein, and each of the dimples formed in the perimeter sidewall has a porous metal coating disposed therein.

[0010] Illustratively, the femoral component can embody a dome femoral component or an anatomic femoral component.

[0011] According to another aspect, a orthopedic implant includes a femoral component. The femoral component includes a solid-metal base having a posterior base surface and an anterior base surface, the posterior base surface having a plurality of dimples formed therein, the anterior base surface having a plurality of pegs extending outwardly therefrom. A posterior end of each of the dimples is defined by an opening formed in the posterior base surface, wherein an anterior end of each of the dimples is defined by a base wall spaced forwardly from the opening. Medial and lateral sides of the dimples are defined by a pair of sidewalls extending from the opening to the base wall. A plurality of adjacent dimples are open to one another. A porous metal coating is disposed on the anterior base surface and the pegs of the solid-metal base. A polymeric bearing is molded to the posterior base surface of the solid-metal base. The polymeric bearing has a posterior bearing surface configured to engage a pair of femoral condyles of a femoral component.

[0012] In one embodiment, the polymeric bearing is molded into the dimples of the solid-metal base.

[0013] In one embodiment, the surface of the sidewall defining the undercut has a rounded surface.

[0014] In one embodiment, the solid-metal base further includes a perimeter sidewall extending between the posterior base surface and the anterior base surface. The perimeter sidewall has a plurality of dimples formed therein, and each of the dimples formed in the perimeter sidewall has a porous metal coating disposed therein.

[0015] Illustratively, the femoral component can embody a dome femoral component or an anatomic femoral component.

[0016] According to yet another aspect of the present disclosure, a method of manufacturing a femoral component includes disposing a porous metal coating onto an anterior surface of a solid-metal base and a plurality of pegs. A polymeric bearing is molded onto a posterior surface of the solid-metal base such that a portion of an anterior surface of the polymeric bearing is disposed within a plurality of dimples formed in the posterior surface of the solid-metal base. A posterior surface of the polymeric bearing forms a femoral bearing surface configured to engage a pair of femoral condyles of a femoral component.

[0017] Exemplarily, the porous metal coating and the solid-metal base are 3D printed as a unitary metal component.

[0018] In one embodiment, the plurality of sidewalls defining the recess of the solid-metal base has an undercut formed in the plurality of sidewalls. A polymer bearing is molded onto the posterior surface of the solid-metal base such that a portion of the anterior surface of the polymer bearing is molded to the sidewalls defining the undercut of the recess.

[0019] The polymer bearing can be molded to include a dome-shaped patellar bearing surface or an anatomical patellar bearing surface, both configured to interface with a pair of femoral condyles of a femoral component. BRIEF DESCRIPTION OF DRAWINGS

[0020] DETAILED DESCRIPTION

[0021] Figure 1 is a perspective view of a metal-backed dome patellar component of an orthopedic knee prosthesis;

[0022] Figure 2 is Figure 1 is a top elevational view of the metal-backed dome patellar component of

[0023] Figure 3 is Figure 1 is a front elevational view of the metal-backed dome patellar component of

[0024] Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3 is not shown in cross-section in Figure 4

[0025] Figure 5 is a perspective view of the solid-metal base of the metal-backed dome patellar component of Figure 1

[0026] is a posterior elevational view of the solid-metal base of Figure 6 Figure 5 is a top elevational view of the solid-metal base of

[0027] Figure 7 Figure 5 is a top elevational view of the solid-metal base of

[0028] Figure 8 is a view similar to Figure 6 but showing the solid-metal base with a thin layer of its posterior surface removed;

[0029] Figure 9 is a cross-sectional view taken along line 4-4 of Figure 6 ​​​The cross-sectional view taken by line 9-9, as observed in the direction of the arrow, note that for clarity, in Figure 9 The porous metal coating is not shown in the cross-section of the image.

[0030] Figure 10 This is an enlarged cross-sectional view showing the recess of the solid-metal base, in which Figure 10 from Figure 9 Capture, as indicated by the surrounding area;

[0031] Figure 11 It is similar to Figure 1 The view shows the metal backing of the orthopedic knee prosthesis, but also the anatomical patellar component.

[0032] Figure 12 yes Figure 11 A perspective view of the anterior side of the anatomical patellar assemblies with a metal backing;

[0033] Figure 13 It is similar to Figure 6 The view, but showing Figure 1 The solid-metal base of the metal-backed dome kneecap assembly has a porous metal coating disposed in its recesses; and

[0034] Figure 14 It is similar to Figure 8 The view, but showing Figure 1 The solid-metal base of the metal-backed dome kneecap assembly has a porous metal coating set in its recess. Detailed Implementation

[0035] While the concepts of this disclosure are readily available in various modifications and alternatives, specific exemplary embodiments thereof have been shown by way of example in the accompanying drawings and will be described in detail herein. However, it should be understood that the concepts of this disclosure are not intended to be limited to the specific forms disclosed, but rather are intended to cover all modifications, equivalents, and alternatives within the spirit and scope of the invention as defined by the appended claims.

[0036] Throughout this specification, when referring to orthopedic implants or prostheses and the surgical instruments described herein, as well as the natural anatomy of a patient, terms indicating anatomical reference, such as anterior, posterior, medial, lateral, superior, inferior, etc., may be used. These terms have well-known meanings in anatomical studies and the field of orthopedic surgery. Unless otherwise stated, these anatomical reference terms used in the written details and claims are intended to be consistent with their well-known meanings.

[0037] Now for reference Figures 1-4, a metal-backed dome knee component 10 of an implantable knee prosthesis is shown. As will be described in greater detail below, the dome knee component 10 includes a polymeric bearing 12 that is molded onto a solid-metal base 14 so as to produce a single-piece (i.e., non-modular) final product. The polymeric bearing 12 of the dome knee component 10 includes a posterior bearing surface 16 that is configured to engage a pair of condylar surfaces (not shown) of a femoral component that has been fixed to a surgically-prepared end of a patient's distal femur (not shown). In particular, the posterior bearing surface 16 of the dome knee component 10 includes an outer articular surface 18 and an inner articular surface 20. The articular surfaces 18, 20 are configured to engage the outer condylar surface and the inner condylar surface, respectively, of the femoral component (not shown). It will be appreciated that such femoral components are configured to emulate the configuration of a patient's native femoral condyles, and as such, the outer condylar surface and the inner condylar surface of the prosthetic femoral component are configured (e.g., curved) in a manner that mimics the condyles of a native femur.

[0038] As can be seen in Figures 2-4 , the solid-metal base 14 of the dome knee component 10 includes a generally planar anterior surface 22 having a plurality of fixation members, such as pegs 24, extending outwardly therefrom. The pegs 24 are configured to be implanted into a surgically-prepared posterior surface of a patient's native knee bone (not shown). In this manner, the posterior bearing surface 16 of the dome knee component 10 faces the femoral component, thereby allowing the posterior bearing surface 16 to engage the femoral condyle surfaces of the patient's knee during flexion and extension of the patient's knee joint.

[0039] The polymeric bearing 12 of the dome knee component 10 is embodied as a unitary polymeric body constructed of a material that allows for smooth articulation between the dome knee component 10 and the femoral component, which is typically constructed of a biocompatible metal, such as cobalt-chrome alloy, although other materials, such as ceramics, can also be used. One such polymeric material is polyethylene, such as ultra-high molecular weight polyethylene (UHMWPE).

[0040] Referring now to Figures 4-10 , the solid-metal base 14 is shown in greater detail. Opposite its anterior surface 22, the solid-metal base 14 includes a circular posterior surface 26 onto which the polymeric bearing 12 is molded. The posterior surface 26 has a plurality of dimples 30 formed therein. As will be discussed below, the dimples 30 allow for polymer interdigitation during molding of the molded polymeric bearing 12 onto the solid-metal base 14. As can be seen in Figure 6 , in the illustrative embodiment described herein, the dimples 30 are arranged in a cross-hatched pattern in the posterior surface 26, although other patterns can also be used. As in Figure 4 , Figure 9 , and Figure 10As can be seen in Figs. 1 and 2, the back end of each of the pockets 30 is defined by an opening 32 formed in the back surface 26, with the opposite front end of the pocket being defined by a base wall 34. The base wall 34 is spaced forwardly of the center of the body of the solid-metal base 14 from the opening 32. The inboard and outboard sides of the pocket 30 are defined by a pair of sidewalls 36 extending from the opening 32 to the base wall 34.

[0041] As can be seen in Figs. 1 and 2, the back end of each of the pockets 30 is defined by an opening 32 formed in the back surface 26, with the opposite front end of the pocket being defined by a base wall 34. The base wall 34 is spaced forwardly of the center of the body of the solid-metal base 14 from the opening 32. The inboard and outboard sides of the pocket 30 are defined by a pair of sidewalls 36 extending from the opening 32 to the base wall 34. Figure 4 , Figure 9 and Figure 10 As can be seen in Figs. 1 and 2, the back end of each of the pockets 30 is defined by an opening 32 formed in the back surface 26, with the opposite front end of the pocket being defined by a base wall 34. The base wall 34 is spaced forwardly of the center of the body of the solid-metal base 14 from the opening 32. The inboard and outboard sides of the pocket 30 are defined by a pair of sidewalls 36 extending from the opening 32 to the base wall 34.

[0042] As can be seen in Figs. 1 and 2, the back end of each of the pockets 30 is defined by an opening 32 formed in the back surface 26, with the opposite front end of the pocket being defined by a base wall 34. The base wall 34 is spaced forwardly of the center of the body of the solid-metal base 14 from the opening 32. The inboard and outboard sides of the pocket 30 are defined by a pair of sidewalls 36 extending from the opening 32 to the base wall 34. Figure 4 As can be seen in Figs. 1 and 2, the back end of each of the pockets 30 is defined by an opening 32 formed in the back surface 26, with the opposite front end of the pocket being defined by a base wall 34. The base wall 34 is spaced forwardly of the center of the body of the solid-metal base 14 from the opening 32. The inboard and outboard sides of the pocket 30 are defined by a pair of sidewalls 36 extending from the opening 32 to the base wall 34.

[0043] As can be seen in Figs. 1 and 2, the back end of each of the pockets 30 is defined by an opening 32 formed in the back surface 26, with the opposite front end of the pocket being defined by a base wall 34. The base wall 34 is spaced forwardly of the center of the body of the solid-metal base 14 from the opening 32. The inboard and outboard sides of the pocket 30 are defined by a pair of sidewalls 36 extending from the opening 32 to the base wall 34. Figure 8 As can be seen in Figs. 1 and 2, the back end of each of the pockets 30 is defined by an opening 32 formed in the back surface 26, with the opposite front end of the pocket being defined by a base wall 34. The base wall 34 is spaced forwardly of the center of the body of the solid-metal base 14 from the opening 32. The inboard and outboard sides of the pocket 30 are defined by a pair of sidewalls 36 extending from the opening 32 to the base wall 34. Figure 8 As can be seen in Figs. 1 and 2, the back end of each of the pockets 30 is defined by an opening 32 formed in the back surface 26, with the opposite front end of the pocket being defined by a base wall 34. The base wall 34 is spaced forwardly of the center of the body of the solid-metal base 14 from the opening 32. The inboard and outboard sides of the pocket 30 are defined by a pair of sidewalls 36 extending from the opening 32 to the base wall 34.

[0044] As can be seen in Figs. 1 and 2, the back end of each of the pockets 30 is defined by an opening 32 formed in the back surface 26, with the opposite front end of the pocket being defined by a base wall 34. The base wall 34 is spaced forwardly of the center of the body of the solid-metal base 14 from the opening 32. The inboard and outboard sides of the pocket 30 are defined by a pair of sidewalls 36 extending from the opening 32 to the base wall 34. Figure 5 and Figure 7As can be seen, the perimeter sidewall 50 extends between the rear surface 26 and the front surface 22 of the solid-metal base 14. Because the dome patella component 10 is embodied as an internally offset dome patella component 10, the perimeter sidewall 50 is wider at the inner side of the solid-metal base 14 than it is at the outer side of the solid-metal base 14. As Figures 5-7 As can be seen, the upper, lower, and inner sides of the perimeter sidewall 50 have a plurality of wall pockets 52 formed therein. The wall pockets 52 extend inwardly from openings 54 formed in the perimeter sidewall 50 into the center of the solid-metal base 14. Similar to the pockets 30 formed in the rear surface 26 of the solid-metal base 14, the wall pockets 52 allow polymer to interleave into the solid-metal base 14 during molding of the molded polymer bearing 12 onto the solid-metal base 14.

[0045] As Figures 2-5 As can be seen, the front surface 22 and peg 24 of the solid-metal base 14 have a porous metal coating 60 disposed thereon. As Figure 5 and Figure 7 As can be seen, the porous metal coating 60 can also be disposed in the wall pockets 52 of the solid-metal base 14. It should be appreciated that the porous metal coating 60 can be a separately applied coating, such as the Porous Coating, which is commercially available from DePuy Synthes of Warsaw, Indiana. However, in the illustrative embodiments described herein, the porous metal coating 60 is disposed on the solid-metal base 14 by virtue of being additively manufactured simultaneously with the solid-metal base 14 so as to result in a common monolithic assembly of the two metal structures.

[0046] In one example, the porous metal coating 60 can be made of a porous material 62, as described in U.S. Patent Application Serial No. 16 / 365,557, filed March 26, 2019, and assigned to the same assignee as the present disclosure, the disclosure of which is hereby incorporated by reference as if set forth in full herein. By way of example, the additive manufacturing process can include powder bed fusion printing (such as melting and sintering), cold spray 3D printing, wire feed 3D printing, fused deposition 3D printing, extrusion 3D printing, liquid metal 3D printing, stereolithography 3D printing, binder jet 3D printing, material jet 3D printing, and the like.

[0047] In one example, reference is made to Figure 4The porous material 62 of the porous metal coating 60 can be defined by a porous three-dimensional structure that can include a plurality of connected unit cells. Each unit cell can define a unit cell structure 64 that includes a plurality of lattice struts defining an outer geometry and a plurality of internal struts defining a plurality of internal geometries disposed within the outer geometry. In one example, the outer geometry can be a rhombic dodecahedron and the internal geometry can be a rhombic trihedral skew hexadecahedron. It should be appreciated that such geometries can vary to suit the needs of a given design. Further, it should be appreciated that the unit cells making up the porous metal coating 60 can also have any suitable alternative geometric shape to suit the needs of a given design.

[0048] The porous material 62 is formed from a metal powder. Illustratively, the metal powder can include, but is not limited to, titanium, titanium alloy, stainless steel, cobalt-chrome alloy, tantalum, or niobium powder. The porous metal coating 60 has a porosity suitable to promote bone ingrowth into the dome knee component 10 when implanting the front surface 22 and pegs 24 of the solid-metal base 14 into the surgically prepared posterior surface of a patient’s knee bone.

[0049] In the illustrative embodiments described herein, the porous metal coating 60 is directly additively manufactured onto the front surface 22 and pegs 24, and is additively manufactured into the wall pockets 52 of the solid-metal base 14. In such embodiments, both structures - i.e., the solid-metal base 14 and the porous metal coating 60 - can be manufactured simultaneously during a common additive manufacturing process. For example, both structures can be manufactured simultaneously in a single 3D printing operation that produces a common monolithic metal component that includes both structures. Alternatively, the porous metal coating 60 can be manufactured as a separate component that is affixed to the solid-metal base 14.

[0050] The polymer bearing 12 can be assembled to the solid-metal base 14 through the use of a variety of different techniques. One illustrative way to do so is through the use of compression molding techniques. For example, the solid-metal base 14 and the material from which the polymer bearing 12 is to be manufactured (e.g., UHMWPE) can be placed in a mold with one another. Thereafter, the components are compression molded with one another under process parameters that cause the material from which the polymer bearing 12 is to be manufactured (e.g., UHMWPE) to be melted and mechanically affixed to the solid-metal base 14 through the compression molding process. As described above, the melted polymer bearing 12 interdigitates with the pockets 30, wall pockets 52 of the solid-metal base 14 when molded thereto. It should also be appreciated that the mold can be configured to not only mold the components with one another, but also to form the posterior bearing surface 16 of the polymer bearing 12.

[0051] Starting materials (e.g., polymers, such as polyethylene) used in molding processes can be provided in a variety of different forms. For example, each of the starting materials can be provided as a preform. The term "preform" herein refers to an article that has been solidified into a rod, sheet, block, slat, etc., such as by stamping or compression molding of polymer resin particles. The term "preform" also includes preformed "discs" which can be prepared by intermediate machining of commercially available preforms. Polymer preforms, such as polyethylene preforms, can be provided in several different pretreatment or preconditioning variants. For example, crosslinked or non-crosslinked (e.g., irradiated or unirradiated) preforms can be utilized. Such preforms can be treated to eliminate (e.g., remelt or quench) or stabilize (e.g., by adding vitamin E as an antioxidant) any free radicals present therein. Alternatively, preforms may not be treated in this manner.

[0052] Starting materials (e.g., polymers and copolymers) may also be provided as powders. The term "powder" herein refers to resin particles. Similar to what has been described above regarding preforms, powders can be provided in several different pre-treated or pre-conditioned variants. For example, cross-linked or non-cross-linked (e.g., irradiated or unirradiated) powders may be utilized.

[0053] like Figure 11 and Figure 12 As shown, although the concepts of this disclosure have been described herein in the context of the dome patellar assembly 10, it should be understood that the concepts of this disclosure can also be used in the design of the anatomical assembly 70. It is also contemplated that a common design for the solid-metal base 14 can be used for both the dome patellar assembly and the anatomical patellar assembly. In such an arrangement, the same solid-metal base 14 will be used with the resulting type of assembly, which is determined by configuring the mold for forming the polymer bearing 12.

[0054] like Figure 13 and Figure 14 As shown, a porous metal coating 60 may be disposed in additional locations within the solid-metal base 14. For example, the porous metal coating 60 may be disposed in the recesses 30, including open areas between adjacent recesses 30 (i.e., the area below segment 46 of the rear surface 26 between recesses 30). In such embodiments, when the polymer bearing 12 is molded to the solid-metal base 14, the molten polymer material (e.g., UHMWPE) is interwoven not only with the structure defining the recesses 30 but also with the porous metal coating 60 within the recesses 30.

[0055] While the disclosure has been illustrated and described in detail in the drawings and foregoing description, such illustration and description is to be considered exemplary and not restrictive in character, it being understood that only illustrative implementation have been shown and described and that all changes and modifications that come within the spirit of the disclosure are desired to be protected.

[0056] Many of the features of the methods, devices, and systems described herein provide the disclosure with a number of advantages. It should be noted that alternative embodiments of the methods, devices, and systems of the disclosure can not include all of the described features and yet benefit from at least some of the advantages of such features. For the above-described methods, devices, and systems, one of ordinary skill in the art can readily contemplate his own implementation of this disclosure that can incorporate one or more of the features of the present disclosure and fall within the spirit and scope of the disclosure as defined by the appended claims.

Claims

1. An orthopaedic implant, comprising: a femoral component, the femoral component comprising: a solid-metal base comprising (i) a posterior base surface having a plurality of dimples formed therein, wherein each of the dimples has an undercut formed therein, and (ii) an anterior base surface having a plurality of pegs extending outwardly therefrom, a porous metal coating disposed on the anterior base surface and the pegs, and a polymeric bearing molded to the posterior base surface of the solid-metal base, the polymeric bearing having a posterior bearing surface configured to interface with a pair of femoral condyles of a femoral component, wherein (i) the solid-metal base further comprises a peripheral sidewall extending between the posterior base surface and the anterior base surface, (ii) the peripheral sidewall has a plurality of dimples formed therein, and (iii) each of the dimples formed in the peripheral sidewall has the porous metal coating disposed therein.

2. The orthopaedic implant of claim 1, wherein the polymeric bearing is molded into the dimples of the solid-metal base.

3. The orthopaedic implant of claim 1, wherein: a posterior end of each of the dimples is defined by an opening formed in the posterior base surface, an anterior end of each of the dimples is defined by a base wall spaced forwardly from the opening, and upper and lower sides of the dimples are defined by a pair of sidewalls extending from the opening to the base wall, wherein the sidewalls have the undercut formed therein.

4. The orthopaedic implant of claim 3, wherein the surfaces of the sidewalls defining the undercut comprise rounded surfaces.

5. The orthopaedic implant of claim 1, wherein the plurality of dimples comprises a plurality of adjacent dimples that are open to one another.

6. The orthopaedic implant of claim 1, wherein the femoral component comprises a dome femoral component.

7. The orthopaedic implant of claim 1, wherein the femoral component comprises an anatomic femoral component.

8. The orthopaedic implant of claim 1, wherein each of the dimples has the porous metal coating disposed therein.

9. An orthopaedic implant, comprising: a femoral component, the femoral component comprising: a solid-metal base including (i) a rear base surface having a plurality of dimples formed therein and (ii) a front base surface having a plurality of pegs extending outwardly therefrom, wherein (a) a rear end of each of the dimples is defined by an opening formed in the rear base surface, (b) a front end of each of the dimples is defined by a base wall spaced forwardly from the opening, (c) an upper side and a lower side of the dimples are defined by a pair of sidewalls extending from the opening to the base wall, (d) the plurality of dimples includes a plurality of adjacent dimples that are open to one another, a porous metal coating disposed on the front base surface and the pegs, and a polymer bearing molded to the rear base surface of the solid-metal base, the polymer bearing having a rear bearing surface configured to interface with a pair of femoral condyles of a femoral component, wherein (i) the solid-metal base further includes a peripheral sidewall extending between the rear base surface and the front base surface, (ii) the peripheral sidewall has a plurality of dimples formed therein, and (iii) each of the dimples formed in the peripheral sidewall has the porous metal coating disposed therein.

10. The orthopedic implant of claim 9, wherein the polymer bearing is molded into the dimples of the solid-metal base.

11. The orthopedic implant of claim 9, wherein each of the pair of sidewalls defining the dimples defines a rounded undercut surface.

12. The orthopedic implant of claim 9, wherein the knee bone component comprises a dome knee bone component.

13. The orthopedic implant of claim 9, wherein the knee bone component comprises an anatomical knee bone component.

14. The orthopedic implant of claim 9, wherein each of the dimples has the porous metal coating disposed therein.

15. A method of manufacturing a knee bone component, comprising: disposing a porous metal coating onto (i) a front surface and (ii) a plurality of pegs of a solid-metal base, and molding a polymer bearing onto a rear surface of the solid-metal base such that (i) a portion of a front surface of the polymer bearing is disposed within a plurality of dimples formed in the rear surface of the solid-metal base and (ii) a rear surface of the polymer bearing forms a knee bone bearing surface configured to interface with a pair of femoral condyles of a femoral component, wherein the solid-metal base further includes a peripheral sidewall extending between the rear surface and the front surface, and wherein the method further comprises disposing the porous metal coating into a plurality of dimples formed in the peripheral sidewall.

16. The method of claim 15, wherein disposing the porous metal coating onto the front surface of the solid-metal base and the plurality of pegs comprises 3D printing the porous metal coating and the solid-metal base as a unitary metal component.

17. The method of claim 15, wherein: the plurality of sidewalls defining the pocket of the solid-metal base have an undercut formed therein, and molding the polymer bearing onto the back surface of the solid-metal base comprises molding the polymer bearing onto the back surface of the solid-metal base such that a portion of the front surface of the polymer bearing is molded to the sidewalls defining the undercut of the pocket.

18. The method of claim 15, wherein molding the polymer bearing onto the back surface of the solid-metal base comprises molding the polymer bearing onto the back surface of the solid-metal base such that the back surface of the polymer bearing forms a dome-shaped condylar bearing surface configured to interface with the pair of femoral condyles of the femoral component.

19. The method of claim 15, wherein molding the polymer bearing onto the back surface of the solid-metal base comprises molding the polymer bearing onto the back surface of the solid-metal base such that the back surface of the polymer bearing forms an anatomically-shaped condylar bearing surface configured to interface with the pair of femoral condyles of the femoral component.

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