Joint arthroplasty systems, methods and components

Abstract

Surgical implant systems, methods, and components are described herein. More particularly, the disclosure relates to joint arthroplasty systems, methods, and components. Particular embodiments described herein can be used to modify the subtalar joint (e.g., posterior facet of the subtalar joint), calcaneocuboid, talonavicular, and any other suitable joint. An exemplary implant system comprises a first implant component, a second implant component, and an insert.

21 . A system for use in a joint arthroplasty for modifying a subtalar joint, the system comprising:
 a first implant component comprising a first convex surface and a third surface;   a second implant component comprising a second concave surface and a fourth surface; and   an insert configured to be inserted in the subtalar joint and between the first implant component and the second implant component, the insert comprising:
 a fifth surface, 
 a shoulder configured to releasably engage with a corresponding recess of one of the first implant component or the second implant component, the recess comprising a pair of sidewalls extending along edges of one of the third surface of the first implant component or the fourth surface of the second implant component, the recess including a recess wall extending between the recess sidewalls along a length of the insert, the length greater than a width of the insert along which the pair of sidewalls extend, and 
 a sixth articulating surface configured to articulate with the other of the third surface of the first implant component or the fourth surface of the second implant component. 
   
     
     
         22 . The system of  claim 21 , wherein the shoulder comprises a pair of shoulder walls configured to be received by the pair of recess sidewalls. 
     
     
         23 . The system of  claim 21 , wherein the fifth surface is a concave surface, and the third surface is configured to articulate with the sixth articulating surface. 
     
     
         24 . The system of  claim 21 , wherein the recess is configured to attach the insert to the second implant component. 
     
     
         25 . The system of  claim 21 , wherein the recess is sized to receive the insert such that the insert does not extend beyond the recess wall. 
     
     
         26 . The system of  claim 21 , wherein the inferior surface of the talus and the superior surface of the calcaneus form a posterior facet of the subtalar joint, and the system is configured to modify the posterior facet of the subtalar joint. 
     
     
         27 . The system of  claim 21 , wherein at least one of the first implant component or the second implant component includes a biocompatible material. 
     
     
         28 . The system of  claim 21 , wherein the first convex surface is smooth or uninterrupted. 
     
     
         29 . The system of  claim 21 , wherein the first convex surface is porous. 
     
     
         30 . The system of  claim 21 , wherein the fourth surface is porous. 
     
     
         31 . The system of  claim 21 , wherein the first implant component includes a plurality of implant projections extending from the first convex surface. 
     
     
         32 . The system of  claim 31 , wherein the plurality of implant projections include a first set of projections spaced from and parallel to a second set of projections. 
     
     
         33 . The system of  claim 21 , wherein the second implant component defines a length greater than a width, and the shoulder is at an end of the length. 
     
     
         34 . The system of  claim 21 , wherein a radius of curvature of the second concave surface equals a radius of curvature of the sixth convex articulating surface. 
     
     
         35 . The system of  claim 21 , wherein the insert is removably coupled with the second implant component. 
     
     
         36 . The system of  claim 21 , wherein the system is configured to be implanted using a lateral and posterior approach. 
     
     
         37 . The system of  claim 21 , further comprising a plurality of fasteners configured to secure at least one of the first implant component to the inferior surface of the talus or the second implant component to the superior surface of the calcaneus. 
     
     
         38 . The system of  claim 38 , wherein the plurality of fasteners are configured to extend at an acute angle to at least one of the first convex surface or the sixth articulating surface. 
     
     
         39 . The system of  claim 21 , wherein the system is configured to treat arthritis of the subtalar joint. 
     
     
         40 . The system of  claim 21 , wherein the one of the first implant component or the second implant component has a proximal end and a distal end having a curvature matching the proximal end, the pair of recess sidewalls extending along the edges of the one of the third surface of the first implant component or the fourth surface of the second implant component from the proximal end to the distal end.