Acetabular surgical implant for segmental pelvic defect and methods of use and manufacture

Abstract

A surgical implant includes a hemispherical cup having a bone-abutment exterior surface defining a convex side of the hemispherical cup and an interior surface defining a concave side of the hemispherical cup with a cavity, and a stress-diffusion element extending directly from the bone-abutment exterior surface of the hemispherical cup at an anteverted orientation to the hemispherical cup. The implant may further include at least one aperture defined by a circumferential surface extending between the bone-abutment exterior surface and the interior surface, the at least one aperture operable to receive a screw therethrough.

What is claimed is: 
     
         1 . A surgical implant comprising:
 a hemispherical cup having (i) a bone-abutment exterior surface defining a convex side of the cup and (ii) an interior surface defining a concave side of the cup with a cavity; and   a stress-diffusion element extending directly from the bone-abutment exterior surface of the hemispherical cup at an anteverted orientation to the hemispherical cup.   
     
     
         2 . The surgical implant of  claim 1 , wherein the hemispherical cup and the stress-diffusion element are monolithic. 
     
     
         3 . The surgical implant of  claim 1 , further comprising at least one aperture defined by a circumferential surface extending between the bone-abutment exterior surface and the interior surface, the at least one aperture configured to receive a screw therethrough. 
     
     
         4 . The surgical implant of  claim 3 , wherein the stress-diffusion element is a stem extending from the hemispherical cup. 
     
     
         5 . The surgical implant of  claim 4 , wherein the stem includes a base formed on the bone-abutment exterior surface of the hemispherical cup. 
     
     
         6 . The surgical implant of  claim 5 , wherein the base is centrally formed between the at least one aperture and another aperture extending between the bone-abutment exterior surface and the interior surface. 
     
     
         7 . The surgical implant of  claim 4 , wherein the stem includes a plurality of longitudinal flutes, each of the plurality of longitudinal flutes extending along an entirety of the stem with (i) distal ends of the plurality of longitudinal flutes adjoining at a common point, and (ii) proximal ends of the plurality of longitudinal flutes tapering at separate points. 
     
     
         8 . The surgical implant of  claim 7 , wherein adjacent ones of the plurality of longitudinal flutes are spaced from each other by one of a plurality of troughs, and each of the plurality of troughs includes sidewalls and a bottom wall. 
     
     
         9 . The surgical implant of  claim 8 , wherein each of the plurality of troughs includes an increasing depth along the stem. 
     
     
         10 . The surgical implant of  claim 8 , wherein each of the plurality of longitudinal flutes includes a plateau along a portion thereof with an increasing width along the stem. 
     
     
         11 . The surgical implant of  claim 8 , wherein each of the plurality of longitudinal flutes surrounds a portion of the adjacent ones of the plurality of troughs. 
     
     
         12 . The surgical implant of  claim 8 , wherein the sidewalls of each of the plurality of troughs converge. 
     
     
         13 . The surgical implant of  claim 3 , wherein the at least one aperture includes four apertures arranged equidistant relative to each other along the hemispherical cup. 
     
     
         14 . The surgical implant of  claim 3 , wherein, the at least one aperture is a plurality of apertures, the plurality of apertures are equidistant relative to each other along the cup, and the stress-diffusion element extends from a point on the bone-abutment exterior surface. 
     
     
         16 . A surgical implant comprising:
 a hemispherical cup having (i) a bone-abutment exterior surface defining a convex side of the hemispherical cup and (ii) an interior surface defining a concave side of the hemispherical cup with a cavity; and   a stress-diffusion element extending directly from the bone-abutment exterior surface of the hemispherical cup at an anteverted orientation to the hemispherical cup, wherein the hemispherical cup and the stress-diffusion element are monolithic.   
     
     
         17 . The surgical implant of  claim 16 , further comprising at least one aperture defined by a circumferential surface extending between the bone-abutment exterior surface and the interior surface, the at least one aperture configured to receive a screw therethrough. 
     
     
         18 . The surgical implant of  claim 16 , wherein the stress-diffusion element includes a plurality of longitudinal flutes, each of the plurality of longitudinal flutes extending along a substantial portion of the stress-diffusion element. 
     
     
         19 . The surgical implant of  claim 16 , wherein the stress-diffusion element is a stem extending from the hemispherical cup. 
     
     
         20 . A surgical implant comprising:
 a hemispherical cup having (i) a bone-abutment exterior surface defining a convex side of the hemispherical cup and (ii) an interior surface defining a concave side of the hemispherical cup with a cavity;   at least one aperture defined by a circumferential surface extending between the bone-abutment exterior surface and the interior surface, the at least one aperture operable to receive a screw therethrough; and   a stress-diffusion element extending directly from the bone-abutment exterior surface of the hemispherical cup at an anteverted orientation to the hemispherical cup, wherein the hemispherical cup and the stress-diffusion element are monolithic.