Hip Joint Device, System and Method

Abstract

A medical device for treating hip joint osteoarthritis in a human patient is provided, the hip joint comprises an acetabulum, being a part of the pelvic bone, and a caput femur, being connected to the collum femur and being the upper extremity of the femoral bone. The caput femur and collum femur further comprises cortical bone, the outer more sclerotic bone, and cancellous bone, placed in the bone marrow, said medical device comprising: an artificial caput femur surface, adapted to be in contact with the acetabulum surface or an artificial replacement therefor, and a fixating member adapted to at least partly be stabilized by the cortical bone of a stabilizing part of the collum femur.

1 . A medical device for treating hip joint osteoarthritis in a human patient, the hip joint comprising an acetabulum being a part of the pelvic bone, and a caput femur being connected to the collum femur and being the upper extremity of the femoral bone, the caput femur and collum femur further comprising cortical bone, the outer more sclerotic bone, and cancellous bone, placed in the bone marrow, said medical device comprising: an artificial caput femur surface adapted to be in contact with the acetabulum surface or an artificial replacement therefor, and a fixating member adapted to at least partly be stabilized by the cortical bone of a stabilizing part of the collum femur, wherein the fixating member comprises a stabilizing member adapted to stabilize the medical device from the outside of the collum femur. 
     
     
         2 . The medical device according to  claim 1 , wherein the collum femur has a longitudinal extension and wherein said fixating member is adapted to at least partly be stabilized by the cortical bone of said stabilizing part of the collum femur, from the inside of the collum femur, substantially perpendicular to the longitudinal extension, and from the acetabulum side of the collum femur, substantially in line with the longitudinal extension. 
     
     
         3 . The medical device according to  claim 1 , wherein the collum femur has a longitudinal extension and wherein said fixating member is adapted to at least partly be stabilized by the cortical bone of said stabilizing part of the collum femur from the inside of the collum femur, substantially perpendicular to the longitudinal extension, from the acetabulum side of the collum femur, substantially in line with the longitudinal extension, and from the outside of the collum femur, substantially perpendicular to the longitudinal extension. 
     
     
         4 . The medical device according to  claim 1 , wherein the collum femur has a longitudinal extension and wherein said fixating member is adapted to at least partly be stabilized by the cortical bone of said stabilizing part of the collum femur from the inside of the collum femur, substantially perpendicular to the longitudinal extension, and from the outside of the collum femur, substantially perpendicular to the longitudinal extension. 
     
     
         5 . The medical device according to  claim 1 , wherein the collum femur has a longitudinal extension and wherein said fixating member is adapted to at least partly be stabilized by the cortical bone of said stabilizing part of the collum femur from the acetabulum side of the collum femur, substantially in line with the longitudinal extension, and from the outside of the collum femur, substantially perpendicular to the longitudinal extension. 
     
     
         6 . The medical device according to  claim 1 , wherein said fixating member is adapted to be positioned on the collum femur. 
     
     
         7 . The medical device according to  claim 1 , wherein said stabilizing part of collum femur is defined to be the proximal half of the collum femur. 
     
     
         8 . The medical device according to  claim 1 , wherein said stabilizing part of the collum femur is defined to be the proximal two third of the collum femur. 
     
     
         9 . The medical device according to  claim 1 , wherein said stabilizing part of the collum femur is defined to be the proximal three quarter of the collum femur. 
     
     
         10 . The medical device according to  claim 1 , wherein said stabilizing part of the collum femur is defined to be the proximal 90% of the collum femur. 
     
     
         11 . The medical device according to  claim 1 , wherein said stabilizing part of the collum femur is defined to be the whole collum femur. 
     
     
         12 . The medical device according to  claim 1 , wherein said fixating member is adapted to at least partly be directly stabilized by the cortical bone of said stabilizing part of the collum femur. 
     
     
         13 . The medical device according to  claim 1 , wherein said fixating member is adapted to at least partly be indirectly stabilized by the cortical bone of said stabilizing part of the collum femur. 
     
     
         14 . The medical device according to  claim 13 , wherein a material is placed between said fixating member and said cortical bone of said stabilizing part of the collum femur. 
     
     
         15 . The medical device according to  claim 14 , wherein said material placed between said fixating member and said cortical bone of said stabilizing part of the collum femur comprises any of the materials selected from a group consisting of:
 bone cement,   an at least partly elastic material,   glue,   adhesive,   antibiotic,   biocompatible plastic material,   biocompatible ceramics, and   biocompatible metal.   
     
     
         16 . The medical device according to  claim 1 , wherein said stabilizing member is adapted to connect to the outside of collum femur surface on at least on two opposite sides thereof. 
     
     
         17 . The medical device according to  claim 1 , wherein the caput femur comprises a caput femur surface area, and said artificial caput femur surface comprises a caput femur surface area, and wherein said artificial caput femur surface area is smaller than the caput femur surface area. 
     
     
         18 . The medical device according to  claim 1 , wherein said fixating member further comprises a mechanical connection adapted to mechanically connect to said cortical bone of said stabilizing part of the collum femur on the inside thereof. 
     
     
         19 . The medical device according to  claim 18 , wherein said mechanical connection is adapted to indirectly connect to said cortical bone of said stabilizing part of the collum femur on the inside thereof. 
     
     
         20 . The medical device according to  claim 1 , wherein said fixating member further comprises a mechanical connection adapted to mechanically connect to said cortical bone of said stabilizing part of the collum femur on the outside thereof.