Compression type prestress femoral prosthesis
A femoral prosthesis and prestressing technology, applied in the direction of femur, bone implants, etc., can solve the problems of inability to provide free movement relief for bone fusion, the diameter of ordinary medullary nails cannot match it, and share stress, so as to prevent bone resorption , increase stability, and promote bone growth
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Embodiment 1
[0048] The purpose of this embodiment is to provide a compression type prestressed femoral prosthesis, according to Figure 1-Figure 3 shown, including
[0049] The medullary canal fixation piece 10 has several pin holes 11 for penetrating the transverse pins 20 in its upper part, and the medullary canal fixation piece 10 is fixed in the medullary canal by penetrating the cortical bone through the transverse pins 20;
[0050] A connecting piece 30, the lower part of the medullary canal fixation piece 10 is inserted into the connecting piece 30 and screwed to the upper part of the connecting piece 30 by a locking nut 40;
[0051] Osteotomy segment 50, the upper part of which is connected with the lower part of said connector 30 by taper fitting;
[0052] The upper part of the femoral condyle 60 is conically fitted with the lower part of the osteotomy segment 50, and the lower part is used for implanting into the knee joint.
[0053] In a specific implementation process, the i...
Embodiment 2
[0061] According to a kind of compressive prestressed femoral prosthesis described in Embodiment 1, according to Figure 1-Figure 4 , Figure 6 , Figure 7 As shown, the intramedullary cavity fixation member 10 also includes a cylindrical anchor bolt 12 and an insertion section 13 located at the lower part of the anchor bolt 12, the anchor bolt 12 and the insertion section 13 are integrally formed, and the insertion section 13 is provided with an externally threaded section 14 for the insertion section 13 to be inserted into the connecting piece 30, and enters from the bottom of the connecting piece 30 through the locking nut 40 to be threadedly connected to the externally threaded section 14;
[0062] Wherein, the pin hole 11 is opened on the anchor bolt 12, and one end of the cross pin 20 penetrates through the pin hole 11 on one side of the anchor bolt 12 and penetrates through the pin hole on the other side of the anchor bolt 12. 11 pierces through the cortical bone to ...
Embodiment 3
[0067] A kind of compressive prestressed femoral prosthesis according to embodiment two, according to Figure 1-Figure 4 , Figure 6 , Figure 7 As shown, the anchor bolt 12 is provided with at least two groups of horizontal pins 20 along its transverse direction, and each group of horizontal pins 20 is provided with at least two horizontal pins 20, and along the longitudinal direction of the anchor bolt 12, etc. The spacing is set so that the adjacent horizontal pins 20 of the anchor bolts 12 in the lateral direction are arranged in a staggered manner;
[0068] Wherein, each of the horizontal pins 20 corresponds to two of the pin holes 11 , for the horizontal pins 20 to be located on the anchor bolts 12 .
[0069] The beneficial effect of above-mentioned technical scheme is:
[0070] The layout design of the cross pin 20 on the anchor bolt 12 further improves the stability between the prosthesis and the femur.
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