Abstract:
The invention relates a nature hipbone device which includes a cotyle cup, an orientation pivot which localizes the cotyle cup in its place, is fixed on the close end of the cotyle cup; at least one link member which is hinged onto the opening edge of the end of the cotyle cup, at least one lock member which sleeve on the edge of an end of the link member apart from the cotyle cup may be located on secure place by the lock member.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention relates to a nature hipbone device, more particularly to a nature hipbone device installed onto an artificial femoral head, and its accessories are fixed to secure a hip joint so that the device will not shift or fall off as the hip joint is moving.  
         [0003]     2. Description of the Related Art  
         [0004]     For the treatment of an injured femoral neck, the damaged part is generally cut away or sawn even and covered by a sheet steel, and then two nails are installed into the femur for fixing the sheet steel. However, the design of such a traditional structure has the following shortcomings: (1) The sheet steel cannot be secured; and (2) The newly grown blood vessels and bone crusts cannot cover the sheet steel effectively, so that the sheet steel cannot be integrated completely with the femur in order to protect the femur. The force exerted on the sheet steel at the damaged part is very limited, and thus the sheet steel will be separated from the femur easily. Further, the sheet steel cannot move according to the movements of the hip joint, which makes the application useless and the patient painful. The abovementioned shortcomings have been major issues for medical people and patients.  
         [0005]     To improve the foregoing shortcomings, a hip joint structure as shown in  FIG. 1  has been introduced. The device includes an artificial joint stem  100  which is substantially curved and corresponding to the shape of the femur. The artificial joint stem  100  is tapered from one end to another end, and the end of the artificial joint stem  100  having a larger cross-sectional area is connected to an artificial femur adjustable joint  110 . A metal cotyle cup  120  is embedded into the artificial femur adjustable joint  110 , and a lining made of a macromolecular material (polyethylene) is disposed between the cotyle cup  120  and the artificial femur adjustable joint  110 .  
         [0006]     When the device is in use, the damaged femur is cut away, and the femoral neck is processed properly, and then the artificial joint stem  100  is inserted into the femur (not shown in the figure), such that the artificial joint stem  100  is penetrated deeply into the femur cavity and integrated with the femur. In the meantime, the metal cotyle cup  120  is fixed into the hip joint by metal nails  121 , and finally the artificial femur adjustable joint  110  is sheathed into the cotyle cup  120 . However, the application of this device has the following drawbacks:  
         [0007]     1. Since both of the artificial femur adjustable joint  110  and the cotyle cup  120  are made of metal, therefore it is necessary to have the polyethylene lining  130  installed between the artificial femur adjustable joint  110  and the cotyle cup  120  to serve as a cushion to reduce frictions. After a long time of use, the polyethylene lining  130  will be worn into debris, which will cause a soluble bone and a loosened cotyle cup.  
         [0008]     2. Since the metal cotyle cup  120  is secured onto the hip joint by metal nails  121  and the nails are located within a specific area, therefore the cotyle cup  120  will be loosened or fallen off easily if it is pressed by the hip joint.  
       SUMMARY OF THE INVENTION  
       [0009]     Therefore, it is the primary objective of the present invention to provide a nature hipbone device which is installed onto an artificial femoral head, and its accessories are fixed to secure the hip joint so that the device will not shift or fall off as the joint moves.  
         [0010]     The nature hipbone device comprises a cotyle cup, and the internal wall of the cotyle cup is a very precise and smooth wall surface for directly receiving an artificial femoral head and minimizing the friction. The cotyle cup includes an orientation pivot and at least one pair of symmetrical link member disposed at the edge of an open end of the cotyle cup, a lock member disposed at a free end of each of the plurality of link member. When the nature hipbone device is in use, the femoral head is cut away and the femoral neck is kept, and then an artificial joint stem pivotally coupled to the artificial femur adjustable joint is inserted into the femur cavity and fixed at a predetermined position by the orientation pivots and locked into the hipbone by the lock member. As a result, the cotyle cup can be fixed into its position by means of the orientation pivots and the lock member at different positions and the cotyle cup can be integrally secured into the hip joint. The artificial femur adjustable joint is sheathed into the cotyle cup, so that the cotyle cup can move according to the movements of the hip joint, and the invention can prevent the cotyle cup from being slid or loosened.  
         [0011]     Further, the cotyle cup includes a cup member corresponding to the shape of the cotyle cup, and the cup member includes a plurality of ribs around the cup member. When the cotyle cup is used, the femoral head is cut away and the femoral neck is kept, and then an artificial joint stem pivotally coupled to the artificial femur adjustable joint is inserted into the femur cavity and the cotyle cup is fixed at a predetermined position by the orientation pivots, and passed through the ribs embedded in the hipbone, so that the cotyle cup can be fixed into its position and secured to the hip joint. The artificial femur adjustable joint is sheathed into the cotyle cup, such that when the cotyle cup moves according to the movements of the femoral joint, the cotyle cup will not be slid or loosened by the pressing of the joint.  
         [0012]     Further, when the cotyle cup is used, the femoral head is cut away and the femoral neck is kept, and then an artificial joint stem pivotally coupled to the artificial femur adjustable joint is inserted into the femur cavity and the cotyle cup is fixed at a predetermined position by the orientation pivots, and the through holes disposed on the cup member allow blood vessels and muscles to be penetrated deeply therein and integrated with the cotyle cup. Therefore, the cotyle cup can be fixed into its position. The artificial femur adjustable joint is sheathed into the cotyle cup, so that when the cotyle cup moves according to the movements of the femoral joint, the cotyle cup will not be slid or loosened by the pressing of the joint.  
         [0013]     Further, the cotyle cup and the artificial femur adjustable joint can be engaged with each other, so that the cotyle cup will not be separated from the artificial femur adjustable joint.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]      FIG. 1  is a schematic view of a prior art nature hipbone device;  
         [0015]      FIG. 2  is an exploded view of a nature hipbone device according to a preferred embodiment of the present invention;  
         [0016]      FIG. 3  is a perspective view of a nature hipbone device according to a preferred embodiment of the present invention;  
         [0017]      FIG. 4  is a cross-sectional view of a nature hipbone device according to another preferred embodiment of the present invention;  
         [0018]      FIG. 5  is a cross-sectional view of a nature hipbone device according to a further preferred embodiment of the present invention; and  
         [0019]      FIG. 6  is a perspective view of a cup member according to a further preferred embodiment of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0020]     The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawing.  
         [0021]     Referring to FIGS.  1  to  3  for the preferred embodiment of the present invention, a nature hipbone device of the invention comprises an artificial joint stem  100  being substantially in a curved shape corresponding to the shape of the femur. The artificial joint stem  100  is tapered from one end to the other end, and the end of the artificial joint stem  100  having a larger cross-sectional area is sheathed into a cotyle cup  30  made of a metal. The cotyle cup  30  adopts a nano technology or other method to make a very smooth surface of its walls, so that when the artificial femur adjustable joint  110  and the cotyle cup  30  are coupled with each other, almost no friction exists between the artificial femur adjustable joint  110  and the cotyle cup  30 .  
         [0022]     Further, the shape of the cotyle cup  30  corresponds to the shape of the artificial femur adjustable joint  110 , and the cotyle cup  30  includes an orientation pivot disposed at the edge of an open end of the cotyle cup  30 . The cotyle cup  30  further includes a thread  31  disposed proximate to the edge surface of an open end of the cotyle cup  30  for being screwed with a cup member  50 . The cup member  50  includes a plurality of through holes  52  thereon, so that blood vessels and muscles can be penetrated therein. The cup member  50  includes a hollow hole  51  corresponding to the orientation pivot  32 , and the cotyle cup  30  includes at least one pair of symmetrical concave openings  33  disposed at the edge of the opening of the cotyle cup  30 . The concave openings  33  separately include a link member  40  embedded in the concave opening  33 , and the link member  40  is an n-shaped frame in this preferred embodiment. The plurality of link member  40  include a pivot  41  embedded at a closed end of the link member  40 , and both sides of the pivot  41  press against the internal side of the cotyle cup  30  to fix the link member  40  onto the cotyle cup  30  and couple with the cotyle cup  30 . An open hole  42  is disposed at an open end of the link member  40  for passing the lock member  43 , and the lock member in this preferred embodiment are screws.  
         [0023]     Referring to FIGS.  1  to  3  for the use of the nature hipbone device, the damaged femoral head is cut away and the femoral neck is processed properly, and then the artificial joint stem  100  is inserted into the femur cavity (not shown in the figure), and penetrated deeply into the femur cavity to integrate with the femur. In the meantime, the metal cotyle cup  30  is penetrated into the hip joint by the orientation pivots and secured into a fixed position, and then locked by the lock member  43 , and thus the cotyle cup  30  can be fixed onto the hip joint. The artificial femur adjustable joint  110  is sheathed into the cotyle cup  30 , so that the cotyle cup  30  can move according to the movement of the hip joint, and the cotyle cup  30  will not be slid or loosened easily by the pressing of the hip joint.  
         [0024]     Referring to  FIG. 4  for another preferred embodiment of the present invention, the device includes an artificial joint stem  100  substantially in a curved shape and is tapered from one end to the other end. An end having a larger cross-sectional area is coupled with an artificial femur adjustable joint  110  and the artificial femur adjustable joint  110  is engaged with a cotyle cup  30  made of metal. The cotyle cup  30  adopts a nano technology or other methods to produce a very smooth wall surface for the internal wall of the cotyle cup  30 , such that when the artificial femur adjustable joint  110  and the cotyle cup  30  are engaged, almost no friction exists between the artificial femur adjustable joint  10  and the cotyle cup  30 .  
         [0025]     Further, the cotyle cup  30  includes an orientation pivot  32  disposed at a closed end of the cotyle cup  30  and a cup member  50  (as shown in  FIG. 2 ) having a corresponding shape with the cotyle cup  30  and screwed onto the cotyle cup  30 . The cup member  50  includes a concave opening  51  corresponding to a protruded fixing pillar  32  and a through hole  52  disposed around the periphery of the cup member  50 .  
         [0026]     Referring to  FIG. 4  for the use of the nature hipbone device, the damaged femoral head is cut away and the femoral neck is processed properly, and then the artificial joint stem  100  is inserted into the femur cavity (not shown in the figure), such that the artificial joint stem  100  can be penetrated into the femur cavity to integrate the artificial joint stem  100  with the femur. In the meantime, the metal cotyle cup  30  is engaged with the hip joint by the orientation pivots  32  and secured at a fixed position and passed through the through hole  52 , so that blood vessels and muscles can penetrate into the cup member  50  and the cotyle cup  30  can be fixed onto the hip joint to sheath the artificial femur adjustable joint  20  into the cotyle cup  30 . The cotyle cup  30  can move according to the movements of the hip joint, and the cotyle cup  30  will not be slid or loosened easily by the pressing of the hip joint.  
         [0027]     Referring to  FIGS. 5 and 6  for the further preferred embodiment of the present invention, the device includes an artificial joint stem  100  that has a curved shape corresponding to the shape of a femur, and the artificial joint stem  100  is tapered from one end to the other end. An end of the artificial joint stem  100  having a larger cross-sectional area is coupled to an artificial femur adjustable joint  20 . The artificial femur adjustable joint  20  includes a metal cotyle cup  30 . The cotyle cup  30  adopts a nano technology or other methods to produce a very smooth surface for the wall of the cotyle cup  30 , such that when the artificial femur adjustable joint  20  and the cotyle cup  30  are engaged, almost no friction exists between the artificial femur adjustable joint  20  and the cotyle cup  30 .  
         [0028]     Further, the cotyle cup  30  includes an orientation pivot  32  and a thread  31 . The thread  31  is screwed onto a corresponding cup member  60  as shown in  FIG. 5 . The cup member  60  includes a hollow hole  61  corresponding to the protruded fixing pillar  32 , and a rib  62  disposed around the cup member  60 .  
         [0029]     Referring to  FIGS. 5 and 6  for the use of the nature hipbone device, the damaged femoral head is cut away and the femoral neck is processed properly, and then the artificial joint stem  100  is inserted into the femur cavity (not shown in the figure), such that the artificial joint stem  100  is penetrated into the femur cavity to integrate the artificial joint stem  100  with the femur. In the meantime, the metal cotyle cup  30  is penetrated into the hip joint through the orientation pivots  32  and secured at a fixed position. With the rib  62  embedded into the hip joint, the cotyle cup  30  can be secured onto the hip joint, and then the artificial femur adjustable joint  110  is sheathed into the cotyle cup  30 . Therefore, the cotyle cup  30  can move according to the movements of the hip joint, and the cotyle cup  30  will not be slid or loosened easily by the pressing of the hip joint.