Attachments for orthopedic implants

Abstract

Apparatuses, kits, and methods for cementing an orthopedic implant to a bone, post attachment, are disclosed in some aspects of the present disclosure. A kit can include a prosthetic component and a cement applicator. The prosthetic component can include an attachment profile that corresponds to a mating profile formed on or in a bone. The cement applicator can be configured to apply a bone cement between the bone and the prosthetic component following alignment between the prosthetic component and the bone or another prosthetic component. The kit can also include a bone cement. A method can include positioning the prosthetic component adjacent to the bone, aligning the prosthetic component relative to the bone or another prosthetic component, and applying a bone cement between the bone and the aligned prosthetic component.

1 .- 20 . (canceled) 
     
     
         21 . A prosthesis positionable between a first bone surface and a second bone surface in a patient, comprising:
 a prosthetic tibial component comprising:
 a first attachment feature having a first attachment profile that is associable with a mating profile of the first bone surface in a male-female mating relationship; and 
 a first articular surface; 
   a prosthetic talus component comprising:
 a second attachment feature having a second attachment profile that is associable with a mating profile of the second bone surface in a male-female mating relationship; and 
 a second articular surface; and 
   a bearing component positionable between the first articular surface of the prosthetic tibial component and the second articular surface of the prosthetic talus component.   
     
     
         22 . The prosthesis of  claim 21 , wherein the first attachment feature and the second attachment feature each extends uninterruptedly from a first end to a second end. 
     
     
         23 . The prosthesis of  claim 22 , wherein the first attachment feature and the second attachment feature each comprises an elongated rail having a solid cross-section entirely formed of highly porous metal. 
     
     
         24 . The prosthesis of  claim 22 , wherein the first attachment feature and the second attachment feature extend across an entirety of the prosthetic tibial component and the prosthetic talus component, respectively. 
     
     
         25 . The prosthesis of  claim 21 , wherein the attachment profile comprises a mushroom-shaped cross-sectional profile. 
     
     
         26 . The prosthesis of  claim 21 , wherein the first articular surface is concave and the second articular surface is convex. 
     
     
         27 . The prosthesis of  claim 26 , wherein the second articular surface subtends an arc segment greater than the first articular surface. 
     
     
         28 . The prosthesis of  claim 21 , wherein:
 the prosthetic tibial component and the prosthetic talus component each comprises:
 a bearing-side substrate formed of a non-porous material; and 
 a bone-engaging structure attached to the bearing-side substrate and including the first or second attachment feature, the bone-engaging structure comprising a porous material; and 
   the bearing component comprises a polymeric material.   
     
     
         29 . The prosthesis of  claim 21 , wherein the bearing component is couplable to either the prosthetic tibial component or the prosthetic talus component. 
     
     
         30 . The prosthesis of  claim 29 , wherein the bearing component is snap-fit to the prosthetic tibial component. 
     
     
         31 . A prosthetic ankle implant comprising:
 a bone-engaging component comprising:
 a bone-engaging structure; 
 a first attachment feature projecting from the bone-engaging structure; and 
 a bearing-side substrate attached to the bone-engaging structure opposite the first attachment feature; and 
   a bearing component positionable against the bearing-side substrate.   
     
     
         32 . The prosthetic ankle implant of  claim 31 , wherein:
 the bone-engaging structure comprises a porous metallic material; and   the bearing component comprises a non-porous polymeric material.   
     
     
         33 . The prosthetic ankle implant of  claim 31 , wherein the bone-engaging component is arcuate such that the bearing-side substrate is concave. 
     
     
         34 . The prosthetic ankle implant of  claim 33 , wherein the bone-engaging component and the bearing component subtend arc segments of equal length. 
     
     
         35 . The prosthetic ankle implant of  claim 34 , wherein the bone-engaging component is configured to join to a tibia. 
     
     
         36 . The prosthetic ankle implant of  claim 31 , wherein the bone-engaging component is arcuate such that the bearing-side substrate is convex. 
     
     
         37 . The prosthetic ankle implant of  claim 36 , wherein the bone-engaging component subtends an arc segment greater than an arc segment subtended by the bearing component. 
     
     
         38 . The prosthetic ankle implant of  claim 37 , wherein the bone-engaging component is configured to join to a talus. 
     
     
         39 . The prosthetic ankle implant of  claim 31 , wherein the first attachment feature comprises an elongated rail having a solid mushroom-like cross-sectional profile 
     
     
         40 . The prosthetic ankle implant of  claim 39 , wherein the first attachment feature extends uninterruptedly from a first end to a second end across an entirety of the bone-engaging structure and is formed entirely of highly porous material.