Prosthetic implant support structure

Abstract

A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.

1 . A prosthetic system for implantation in a cavity of a bone, the prosthetic system comprising:
 a prosthetic implant; and   a support structure secured to an inner surface of the cavity of the bone, the support structure comprising a pair of components arranged in spaced apart relationship thereby defining a channel between the pair of components, each component having a configuration approximating a quarter of a sphere, the support structure having an inner surface,   wherein the prosthetic implant is received in the channel of the support structure, and a portion of the prosthetic implant is secured to the inner surface of the support structure by an adhesive.   
   
   
       2 . The prosthetic system of  claim 1 , wherein each component has at least one opening. 
   
   
       3 . The prosthetic system of  claim 2 , wherein each opening is filled with bone graft material. 
   
   
       4 . A prosthetic system for implantation in a cavity of a bone, the prosthetic system comprising:
 a prosthetic implant; and   a support structure having an outer surface which is secured to an inner surface of the cavity of the bone and an inner surface which defines an axial channel extending along a length of the support structure, the support structure being formed by a plurality of components arranged in spaced apart relationship,   wherein at least a portion of an outer surface of the prosthetic implant is received in the channel of the support structure and is secured to the inner surface of the support structure by an adhesive.   
   
   
       5 . The prosthetic system of  claim 4  wherein the plurality of components comprises a pair of components, each component having a configuration approximating a quarter of a sphere. 
   
   
       6 . The prosthetic system of  claim 4  wherein each component has at least one opening. 
   
   
       7 . The prosthetic system of  claim 6  wherein each opening is filled with bone graft material. 
   
   
       8 . The prosthetic system of  claim 7  wherein the prosthetic implant is an acetabular cup, and the bone is a hip bone. 
   
   
       9 . The prosthetic system of  claim 4  wherein the support structure is positioned in the cavity such that the support structure does not extend beyond a plane defined by an outer surface of the bone. 
   
   
       10 . A support structure for anchoring at least a portion of a prosthetic implant in a cavity of a bone, the support structure comprising:
 a plurality of components arranged in spaced apart relationship, the components defining an outer surface of the support structure shaped to fit in the cavity and engage the bone and defining an inner surface which defines an axial channel that extends through a length of the support structure, the axial channel being dimensioned to receive the portion of the prosthetic implant.   
   
   
       11 . The support structure of  claim 10  wherein the plurality of components comprises a pair of components, each component having a configuration approximating a quarter of a sphere. 
   
   
       12 . The support structure of  claim 10  wherein each component has at least one opening. 
   
   
       13 . The support structure of  claim 12  wherein each opening is filled with bone graft material. 
   
   
       14 . The support structure of  claim 10  wherein the components are dimensioned and arranged such that when the components are positioned in the cavity, the components do not extend beyond a plane defined by an outer surface of the bone. 
   
   
       15 . A method for implanting a prosthesis into a cavity of a bone, the method comprising:
 securing a plurality of support components to an inner surface of the cavity of the bone in spaced apart relationship thereby defining a support structure having an axial channel that extends through a length of the support structure;   inserting a portion of the prosthesis into the channel; and   securing the portion of the prosthesis to an inner surface of the support structure with an adhesive.   
   
   
       16 . The method of  claim 15  wherein the plurality of components comprises a pair of components, each component having a configuration approximating a quarter of a sphere. 
   
   
       17 . The method of  claim 16  wherein each component has at least one opening. 
   
   
       18 . The method of  claim 17  further comprising filling each opening with bone graft material. 
   
   
       19 . The method of  claim 15  wherein the prosthesis is an acetabular cup, and the bone is a hip bone. 
   
   
       20 . The method of  claim 15  wherein the support components are positioned in the cavity such that the support components do not extend beyond a plane defined by the outer surface of the bone. 
   
   
       21 . A periprosthetic support structure adapted to be implanted in a cavity formed in a bone, the periprosthetic support structure adapted to be coupled to a prosthetic implant, the periprosthetic support structure comprising:
 a first support component having a first inner spherical surface and a textured first outer surface adapted to facilitate ingrowth of the bone proximate the cavity; and   a second support component having a second inner spherical surface and a second textured outer surface adapted to facilitate ingrowth of the bone proximate the cavity,   said first support component disposed opposite said second support component so that said first and second inner spherical surfaces define an implant region that is at least partially spherical, said implant region sized to receive the prosthetic implant.   
   
   
       22 . The periprosthetic support structure of  claim 21 , wherein said first support component and said second support component each have a configuration approximating a quarter of a sphere. 
   
   
       23 . The periprosthetic support structure of  claim 21 , wherein said first support component and said second support component each have a configuration approximating a boomerang shape. 
   
   
       24 . The periprosthetic support structure of  claim 21 , wherein said first support component has at least one opening extending between said first inner spherical surface and said first outer surface. 
   
   
       25 . The periprosthetic support structure of  claim 24 , wherein said at least one opening is configured to receive one of a bone graft material and a fastener. 
   
   
       26 . The periprosthetic support structure of  claim 21 , wherein said first support component is spaced apart from said second support component to define a gap between said first support component and said second support component. 
   
   
       27 . The periprosthetic support structure of  claim 21 , further comprising an adhesive, at least one of said first inner spherical surface and said second inner spherical surface having a rough inner surface finish adapted to facilitate interdigitation of the adhesive. 
   
   
       28 . The periprosthetic support structure of  claim 21 , wherein said first support component and said second support component are substantially identical, each of said first and second component including:
 a configuration approximating a quarter of a sphere;   a first semi-annular wall defining a first plane;   a second semi-annular wall defining a second plane that is perpendicular to said first plane;   a pair of generally triangular openings each having a first side corresponding to said first semi-annular wall, a second side corresponding to said second semi-annular wall, and a third side extending transverse to said first and second semi-annular walls; and   a web formed between respective third sides of said pair of generally rectangular openings.