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Intramedullary nail

An intramedullary nail and screw technology, applied in the field of intramedullary nails

Inactive Publication Date: 2002-11-06
SYNTHES GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this configuration is that the two hip screws (femoral head screw and hip pin) housed in the femoral head are inserted into the cylindrical hole of the intramedullary nail with stable angle

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0024] The intramedullary nail 1 shown in FIGS. 1 and 4 for treating femoral fractures has a distal end 2 , a proximal end 3 and a longitudinal axis 4 defined for insertion into the canal of the medullary canal. Furthermore, the intramedullary nail 1 has a first bore 5 with a longitudinal axis 6 , which intersects the longitudinal axis 4 , adjacent to the proximal end 3 , and which is intended to receive a femoral head screw 10 . The center line 6 of the first cylindrical hole 5 intersects the longitudinal axis 4 at an angle α of 30° to 70°, or at an angle 180°-α of 110° to 150°. Secondly, the intramedullary nail 1 is also provided with a second hole 7 with a longitudinal axis 8 transversely intersecting the longitudinal axis 4 between the first hole 5 and the proximal end 3 for accommodating a hip pin 20 . The center line of the second hole forms an angle β of 45° with the longitudinal axis.

[0025] Such as figure 2 As shown, the side inlet 13 and the middle outlet 14 of t...

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Abstract

Intramedullary nails (1) are used to treat femur fractures. It has a distal end (2) determined for insertion into the medullary canal, a proximal end (3) and a longitudinal axis (4). A first hole (5) near the proximal end (3) and transversely intersecting the longitudinal axis (4) is used to accommodate a femoral head screw (10), wherein the center line (6) of the first hole (5) is in line with the The longitudinal axes intersect at an angle of 110° to 150°. A second hole (7) located between the first hole (5) and the proximal end (3) and transverse to the longitudinal axis (4) receives a hip pin (20). The second hole (7) is at least partially formed as a long hole, which has a width B and a length L>B, wherein the length of the long hole is distributed along the direction of the longitudinal axis (4).

Description

technical field [0001] The invention relates to an intramedullary nail according to the preamble of claim 1 . Background technique [0002] An intramedullary nail of this type is known from EP-A 0 551 588 . The disadvantage of this configuration is that the two hip screws (femoral head screw and hip pin) housed in the femoral head are inserted into the cylindrical hole of the intramedullary nail with stable angle. Due to the difference in their size-dependent flexural strength, it is clinically possible for the two screws to move relative to each other. Due to poor axial sliding or even seizure of the smaller hip pin, it may penetrate the hip joint. Contents of the invention [0003] The present invention proposes some improvements here. The object of the present invention is to create an intramedullary nail which does not have the above-mentioned disadvantages. [0004] The invention achieves the stated object with an intramedullary nail having the features of claim 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/58A61B17/74A61B17/78
CPCA61B17/744
Inventor 罗伯特·弗里格彼得·布伦纳
Owner SYNTHES GMBH
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