US2003065397A1PendingUtilityA1
Prosthetic implant support structure

Priority: Aug 27, 2001Filed: Aug 22, 2002Published: Apr 3, 2003
Est. expiryAug 27, 2021(expired)· nominal 20-yr term from priority
Inventors:Arlen D. Hanssen David Lewallen
A61F 2002/30245A61F 2002/30593A61F 2002/30273A61F 2/30965A61F 2002/30449A61F 2/389A61F 2002/30299A61F 2310/00239A61F 2002/30736A61F 2/30A61F 2002/30131A61F 2/36A61F 2002/30738A61F 2220/0033A61F 2230/0086A61F 2002/30777A61F 2/34A61F 2230/0069A61F 2002/30354A61F 2002/2835A61F 2310/00017A61F 2002/30233A61F 2310/00203A61F 2002/30235A61F 2002/30784A61F 2002/3625A61F 2002/30228A61F 2002/4681A61F 2/3662A61F 2/30771A61F 2230/0093A61F 2002/30841A61F 2002/3611A61F 2002/30878A61F 2230/0071A61F 2002/30276A61F 2310/00023A61F 2002/30324A61F 2250/0036A61F 2/30734A61F 2/30767A61B 17/86A61F 2002/3403A61F 2220/005A61F 2002/3631A61F 2002/4631A61F 2310/00131A61F 2002/30606A61F 2310/00029A61F 2230/0013A61F 2002/30616
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References
Claims
Abstract

A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of the cavity in the end of the 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 channel by an adhesive. The stem of the prosthesis beyond the channel may be cemented or uncemented. The support structure may have an approximately funnel shape. The support structure may be a hollow porous cylindrical sleeve. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining a channel between the pair of components. The support structure may comprise a plurality of pedestals secured to the inner surface of the cavity of the bone.
Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A prosthetic system for implantation in a cavity in an end of a bone, the prosthetic system comprising; 
 a prosthetic implant; and    a support structure secured to an inner surface of the cavity in the end of the bone, the support structure having an inner surface defining an axial channel that extends through the length of the support structure,    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 channel of the support structure by an adhesive.    
     
     
         2 . The prosthetic system of  claim 1  wherein: 
 the support structure has an end surface which surrounds the channel at the end of the bone, and  
 a portion of the prosthetic implant is secured to the end surface of the support structure by an adhesive.  
 
     
     
         3 . The prosthetic system of  claim 1  wherein: 
 the prosthetic implant has a body and an attached stem extending away from the body, and  
 at least a portion of an outer surface of the stem of the prosthetic implant is received in the channel of the support structure and is secured to the inner surface of the channel by the adhesive.  
 
     
     
         4 . The prosthetic system of  claim 3  wherein: 
 at least a portion of the outer surface of the stem adjacent a distal end of the stem of the prosthetic implant is secured to the inner surface of the cavity of the bone.  
 
     
     
         5 . The prosthetic system of  claim 1  wherein: 
 at least a portion of the inner surface of the channel is textured.  
 
     
     
         6 . The prosthetic system of  claim 1  wherein: 
 at least a portion of an end surface of the support structure adjacent the end of the bone is textured.  
 
     
     
         7 . The prosthetic system of  claim 1  wherein: 
 a perimeter region of a bearing surface of the prosthetic implant is secured to an end surface of the bone.  
 
     
     
         8 . The prosthetic system of  claim 1  wherein the support structure comprises: 
 a hollow sleeve having a sloped outer surface such that the length of a first perimeter of one end of the sleeve is greater than the length of a second perimeter at an opposite end of the sleeve.  
 
     
     
         9 . The prosthetic system of  claim 8  wherein: 
 the prosthetic implant has a body and a stem extending away from the body, and  
 at least a portion of an outer surface of the stem of the prosthetic implant is received in the channel of the support structure and is secured to the inner surface of the channel by the adhesive.  
 
     
     
         10 . The prosthetic system of  claim 1  wherein the support structure comprises: 
 a pair of components arranged in spaced apart relationship thereby defining the channel between the pair of components, each component having a configuration approximating a quarter of a sphere.  
 
     
     
         11 . The prosthetic system of  claim 10  wherein: 
 each component has at least one opening.  
 
     
     
         12 . The prosthetic system of  claim 11  wherein: 
 each opening is filled with bone graft material.  
 
     
     
         13 . The prosthetic system of  claim 1  wherein the support structure comprises: 
 a hollow porous cylindrical sleeve.  
 
     
     
         14 . The prosthetic system of  claim 13  wherein: 
 the sleeve includes two sections, one of the sections having a smaller outside diameter.  
 
     
     
         15 . The prosthetic system of  claim 13  wherein: 
 the prosthetic implant has a body and a stem extending away from the body, and  
 at least a portion of an outer surface of the stem of the prosthetic implant is received in the channel of the support structure and is secured to the inner surface of the channel by the adhesive.  
 
     
     
         16 . The prosthetic system of  claim 1  wherein the support structure comprises: 
 a plurality of pedestals, each pedestal being secured to the inner surface of the cavity of the bone.  
 
     
     
         17 . The prosthetic system of  claim 16  wherein: 
 each pedestal includes an end surface adjacent the end of the bone, and the end surface of each pedestal is secured to a portion of a bearing surface of the prosthetic implant.  
 
     
     
         18 . The prosthetic system of  claim 16  wherein: 
 the pedestals are arranged in a circular arrangement whereby the channel is circular.  
 
     
     
         19 . The prosthetic system of  claim 16  wherein the support structure further comprises: 
 bone graft material surrounding the plurality of pedestals, the bone graft material defining the channel.  
 
     
     
         20 . The prosthetic system of  claim 16  wherein: 
 each pedestal comprises a flat body section and a stem section extending substantially perpendicularly from the body section, the stem section of each pedestal being secured to the inner surface of the cavity of the bone, and the flat body sections of the pedestals are secured to a portion of a bearing surface of the prosthetic implant.  
 
     
     
         21 . A prosthetic system for implantation in a cavity in an end of a bone, the prosthetic system comprising: 
 a prosthetic implant having a body which forms part of a mechanical joint and an attached stem extending away from the body; and    a hollow sleeve having an outer surface shaped to fit in the cavity and an inner surface which defines an axial channel that extends through the length of the sleeve, the sleeve being secured to an inner surface of the cavity in the end of the bone,    wherein at least a portion of an outer surface of the stem of the prosthetic implant is received in the channel of the sleeve and is secured to the inner surface of the channel by an adhesive.    
     
     
         22 . The prosthetic system of  claim 21  wherein: 
 a portion of the body of the prosthetic implant is secured to an end surface of the sleeve adjacent the end of the bone by an adhesive.  
 
     
     
         23 . The prosthetic system of  claim 22  wherein: 
 a perimeter region of a bearing surface of the body of the prosthetic implant is secured to an end surface of the bone.  
 
     
     
         24 . The prosthetic system of  claim 21  wherein: 
 at least a portion of the outer surface of the stem adjacent a distal end of the stem of the prosthetic implant is secured to the inner surface of the cavity of the bone.  
 
     
     
         25 . The prosthetic system of  claim 21  wherein: 
 at least a portion of the inner surface of the channel is textured, and at least a portion of an end surface of the sleeve adjacent the end of the bone is textured.  
 
     
     
         26 . The prosthetic system of  claim 21  wherein: 
 the sleeve is positioned in the cavity such that the sleeve does not extend beyond a plane defined by an outer surface of the end of the bone.  
 
     
     
         27 . The prosthetic system of  claim 21  wherein: 
 the sleeve has a sloped outer surface such that the length of a first perimeter of one end of the sleeve is greater than the length of a second perimeter at an opposite end of the sleeve.  
 
     
     
         28 . The prosthetic system of  claim 21  wherein: 
 the sleeve is a porous cylindrical sleeve.  
 
     
     
         29 . The prosthetic system of  claim 28  wherein: 
 the sleeve includes two sections, one of the sections having a smaller outside diameter.  
 
     
     
         30 . The prosthetic system of  claim 28  wherein: 
 the cavity in the bone extends into the diaphyseal region of the bone, and a portion of the sleeve is secured to an inner surface of the cavity in the diaphyseal region of the bone.  
 
     
     
         31 . A prosthetic system for implantation in a cavity in an end of a bone, the prosthetic system comprising: 
 a prosthetic implant; and    a support structure having an outer surface which is secured to the inner surface of the cavity in the end of the bone and an inner surface which defines an axial channel extending the 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 channel by an adhesive.    
     
     
         32 . The prosthetic system of  claim 31  wherein: 
 the plurality of components comprises a pair of components, each component having a configuration approximating a quarter of a sphere.  
 
     
     
         33 . The prosthetic system of  claim 31  wherein: 
 each component has at least one opening.  
 
     
     
         34 . The prosthetic system of  claim 33  wherein: 
 each opening is filled with bone graft material.  
 
     
     
         35 . The prosthetic system of  claim 34  wherein: 
 the prosthetic implant is an acetabular cup, and the bone is a hip bone.  
 
     
     
         36 . The prosthetic system of  claim 31  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 end of the bone.  
 
     
     
         37 . A prosthetic system for implantation in a cavity in an end of a bone, the prosthetic system comprising: 
 a prosthetic implant having a body which forms part of a mechanical joint and an attached stem extending away from the body; and    a support structure secured to the inner surface of the cavity of the bone and having an inner surface defining an axial channel that extends through the length of the support structure, the support structure including a plurality of pedestals,    wherein at least a portion of an outer surface of the stem of the prosthetic implant is received in the channel of the support structure and is secured to the inner surface of the channel by an adhesive.    
     
     
         38 . The prosthetic system of  claim 37  wherein: 
 each pedestal includes an end surface adjacent the end of the bone, and the end surface of each pedestal is secured to a portion of the body of the prosthetic implant.  
 
     
     
         39 . The prosthetic system of  claim 37  wherein: 
 the pedestals are arranged in a circular arrangement whereby the channel is circular.  
 
     
     
         40 . The prosthetic system of  claim 37  wherein the support structure further comprises: 
 bone graft material surrounding the plurality of pedestals, the bone graft material defining the channel.  
 
     
     
         41 . The prosthetic system of  claim 37  wherein: 
 each pedestal comprises a flat body section and a stem section extending substantially perpendicularly from the body section, the stem section of each pedestal being secured to the inner surface of the cavity of the bone, and the flat body sections of the pedestals are secured to a portion of the body of the prosthetic implant.  
 
     
     
         42 . A support structure for anchoring at least a portion of a prosthetic implant in a cavity in an end of a bone, the support structure comprising: 
 a hollow sleeve having an outer surface shaped to fit in the cavity and engage the bone and having an inner surface which defines an axial channel that extends through the length of the sleeve, the axial channel being dimensioned to receive the portion of the prosthetic implant,    wherein at least a portion of the inner surface of the channel is textured.    
     
     
         43 . The support structure of  claim 42  wherein: 
 at least a portion of an end surface of the sleeve is textured.  
 
     
     
         44 . The support structure of  claim 42  wherein: 
 the sleeve is dimensioned such that when the sleeve is positioned in the cavity, the sleeve does not extend beyond a plane defined by an outer surface of the end of the bone.  
 
     
     
         45 . The support structure of  claim 42  wherein: 
 the sleeve has a sloped outer surface such that the length of a first perimeter of one end of the sleeve is greater than the length of a second perimeter at an opposite end of the sleeve.  
 
     
     
         46 . The support structure of  claim 42  wherein: 
 the sleeve is a porous cylindrical sleeve.  
 
     
     
         47 . The support structure of  claim 46  wherein: 
 the sleeve includes two sections, one of the sections having a smaller outside diameter.  
 
     
     
         48 . A support structure for anchoring at least a portion of a prosthetic implant in a cavity in an end 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 the length of the support structure, the axial channel being dimensioned to receive the portion of the prosthetic implant.    
     
     
         49 . The support structure of  claim 48  wherein: 
 the plurality of components comprises a pair of components, each component having a configuration approximating a quarter of a sphere.  
 
     
     
         50 . The support structure of  claim 48  wherein: 
 each component has at least one opening.  
 
     
     
         51 . The support structure of  claim 50  wherein: 
 each opening is filled with bone graft material.  
 
     
     
         52 . The support structure of  claim 48  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 end of the bone.  
 
     
     
         53 . A support structure for anchoring at least a portion of a prosthetic implant in a cavity in an end of a bone, the support structure comprising: 
 a plurality of pedestals, each pedestal being secured to the inner surface of the cavity of the bone, the pedestals being arranged in spaced apart relationship, the pedestals defining an inner surface which defines an axial channel that extends through the length of the support structure, the axial channel being dimensioned to receive the portion of the prosthetic implant.    
     
     
         54 . The support structure of  claim 53  wherein: 
 each pedestal includes an end surface adjacent the end of the bone, and  
 the end surfaces of each pedestal define a mounting surface for a portion of a body of the prosthetic implant.  
 
     
     
         55 . The support structure of  claim 53  wherein: 
 the pedestals are arranged in a circular arrangement whereby the channel is circular.  
 
     
     
         56 . The support structure of  claim 53  wherein the support structure further comprises: 
 bone graft material surrounding the plurality of pedestals, the bone graft material defining the channel.  
 
     
     
         57 . The support structure of  claim 53  wherein: 
 each pedestal comprises a flat body section and a stem section extending substantially perpendicularly from the body section, the stem section of each pedestal being secured to the inner surface of the cavity of the bone.  
 
     
     
         58 . A method for implanting a prosthesis having a body and an attached stem extending away from the body into a bone, the method comprising: 
 locating or creating a cavity in the end of the bone;    securing a sleeve having an axial channel that extends through the length of the sleeve to an inner surface of the cavity in the end of the bone;    inserting the stem of the prosthesis into the axial channel; and    securing at least a portion of an outer surface of the stem of the prosthesis to the inner surface of the channel with an adhesive.    
     
     
         59 . The method of  claim 58  further comprising: 
 securing a portion of the body of the prosthesis to an end surface of the sleeve adjacent an end of the bone with an adhesive.  
 
     
     
         60 . The method of  claim 59  further comprising: 
 securing a perimeter region of a surface of the body of the prosthesis to an end surface of the bone.  
 
     
     
         61 . The method of  claim 58  further comprising: 
 securing at least a portion of the outer surface of the stem adjacent a distal end of the stem of the prosthesis to the inner surface of the cavity of the bone.  
 
     
     
         62 . The method of  claim 58  further comprising: 
 positioning the sleeve in the cavity such that the sleeve does not extend beyond a plane defined by the outer surface of an end of the bone.  
 
     
     
         63 . The method of  claim 58  wherein: 
 the sleeve has a sloped outer surface such that the length of a first perimeter of one end of the sleeve is greater than the length of a second perimeter at an opposite end of the sleeve.  
 
     
     
         64 . The method of  claim 58  wherein: 
 the sleeve is a porous cylindrical sleeve, the cavity in the bone extends into the diaphyseal region of the bone, and a portion of the sleeve is secured to an inner surface of the cavity in the diaphyseal region of the bone.  
 
     
     
         65 . A method for implanting a prosthesis into a bone, the method comprising: 
 locating or creating a cavity in the end of the bone;    securing a plurality of support components to an inner surface of the cavity in the end of the bone in spaced apart relationship thereby defining a support structure having an axial channel that extends through the length of the support structure;    inserting a portion of the prosthesis into the channel; and    securing the portion of the prosthesis to the inner surface of the channel with an adhesive.    
     
     
         66 . The method of  claim 65  wherein: 
 the plurality of components comprises a pair of components, each component having a configuration approximating a quarter of a sphere.  
 
     
     
         67 . The method of  claim 66  wherein: 
 each component has at least one opening.  
 
     
     
         68 . The method of  claim 67  further comprising: 
 filling each opening with bone graft material.  
 
     
     
         69 . The method of  claim 65  wherein: 
 the prosthesis is an acetabular cup, and the bone is a hip bone.  
 
     
     
         70 . The method of  claim 65  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 an end of the bone.  
 
     
     
         71 . A method for implanting a prosthesis having a body and an attached stem extending away from the body into a bone, the method comprising: 
 locating or creating a cavity in the end of the bone;    securing a plurality of pedestals to an inner surface of the cavity in the bone in spaced apart relationship to thereby define a support structure having an axial channel that extends through the length of the support structure;    inserting the stem of the prosthesis into the axial channel; and    securing at least a portion of an outer surface of the stem to the inner surface of the channel with an adhesive.    
     
     
         72 . The method of  claim 71  wherein: 
 each pedestal includes an end surface, the pedestals are secured to the inner surface of the cavity such that each end surface is positioned adjacent the end of the bone, and  
 the end surface of each pedestal is secured to a portion of the body of the prosthesis.  
 
     
     
         73 . The method of  claim 71  wherein: 
 the pedestals are arranged in a circular arrangement whereby the channel is circular.  
 
     
     
         74 . The method of  claim 71  further comprising: 
 surrounding the plurality of pedestals with bone graft material whereby the bone graft material defines the channel.  
 
     
     
         75 . The method of  claim 71  wherein: 
 each pedestal comprises a flat body section and a stem section extending substantially perpendicularly from the body section, the stem section of each pedestal being secured to the inner surface of the cavity of the bone, and  
 the flat body sections of the pedestals are secured to a portion of the body of the prosthesis.
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