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Intramedullary nail device for eliminating locking gaps

A technology of intramedullary nails and gaps, applied in the field of intramedullary nails for internal fixation in orthopedics, can solve problems such as the difficulty of implementing intramedullary nails, and achieve the effect of eliminating movable gaps and high coaxiality

Inactive Publication Date: 2019-01-01
危杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current intramedullary nail technology has a big problem: after the intramedullary nail is implanted in the medullary cavity, in order for the locking screw to enter the locking hole of the intramedullary nail, the diameter of the locking hole of the intramedullary nail must be larger than the outer diameter of the locking screw.
However, because the locking device requires a very high concentricity between the screw direction and the threaded hole, it is difficult to achieve in intramedullary nails.

Method used

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  • Intramedullary nail device for eliminating locking gaps
  • Intramedullary nail device for eliminating locking gaps
  • Intramedullary nail device for eliminating locking gaps

Examples

Experimental program
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Effect test

Embodiment 1

[0034] An intramedullary nail device that eliminates locking gaps, the intramedullary nail device includes an intramedullary nail, a locking screw and an outer guide, and the intramedullary nail has a proximal locking hole and a distal locking hole , a chute hole and a proximal locking oblique hole, the proximal locking hole, the distal locking hole and the proximal locking oblique hole are threaded, the locking screw matches the thread, the The outer guide has a proximal positioning hole, a proximal positioning oblique hole, a distal main positioning hole, and a distal secondary positioning hole;

[0035] The proximal locking oblique hole of the intramedullary nail and the axis of the intramedullary nail form an angle of 45 degrees; The included angle between the inclined hole and the axis of the intramedullary nail is the same; the aperture of the chute hole is larger than the aperture of the proximal locking hole;

[0036] The locking screw is a stepped locking screw;

[...

Embodiment 2

[0043] An intramedullary nail device that eliminates locking gaps, the intramedullary nail device includes an intramedullary nail, a locking screw and an outer guide, and the intramedullary nail has a proximal locking hole and a distal locking hole , a chute hole and a proximal locking oblique hole, the proximal locking hole, the distal locking hole and the proximal locking oblique hole are threaded, the locking screw matches the thread, the The outer guide has a proximal positioning hole, a proximal positioning oblique hole, a distal main positioning hole, and a distal secondary positioning hole;

[0044] The proximal locking oblique hole of the intramedullary nail and the axis of the intramedullary nail form an angle of 50 degrees; The included angle between the inclined hole and the axis of the intramedullary nail is the same; the aperture of the chute hole is larger than the aperture of the proximal locking hole;

[0045] The locking screw is a stepped locking screw;

[...

Embodiment 3

[0052] An intramedullary nail device that eliminates locking gaps, the intramedullary nail device includes an intramedullary nail, a locking screw and an outer guide, and the intramedullary nail has a proximal locking hole and a distal locking hole , a chute hole and a proximal locking oblique hole, the proximal locking hole, the distal locking hole and the proximal locking oblique hole are threaded, the locking screw matches the thread, the The outer guide has a proximal positioning hole, a proximal positioning oblique hole, a distal main positioning hole, and a distal secondary positioning hole;

[0053] The proximal locking oblique hole of the intramedullary nail and the axis of the intramedullary nail form an angle of 50 degrees; The included angle between the inclined hole and the axis of the intramedullary nail is the same; the aperture of the chute hole is larger than the aperture of the proximal locking hole;

[0054] The locking screw is a stepped locking screw;

[...

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Abstract

The invention provides an intramedullary nail device for eliminating locking gaps. The intramedullary nail device comprises an intramedullary nail, a locking screw and an outer guide, the intramedullary nail has a proximal locking hole, one distal locking hole, one sliding slot hole and one proximal locking inclined hole, the proximal locking hole, the distal locking hole and the proximal lockinginclined hole are threaded, the locking screw is matched with the threaded hole, and the outer guide has one proximal locating hole, one proximal locating inclined hole, one distal primary locating hole and one distal secondary locating hole. As there is no gap between that loc screw and the intramedullary nail, the invention eliminates the movable gap between the loc nail and the nail hole existing in the current clinical intramedullary nail technology, solves the problem of rotational instability, has a compression effect, and is more conducive to fracture healing.

Description

technical field [0001] The invention relates to an intramedullary nail technology for internal fixation in orthopedics, in particular to an intramedullary nail device for eliminating locking gaps. Background technique [0002] Currently, the treatment of fractures of long tubular bones has gradually changed from traditional plate fixation to intramedullary nail fixation. Compared with the plate fixation technique, the intramedullary nail fixation technique has better mechanical properties, can provide more stable fixation and support, and has less damage to the blood supply of the bone and soft tissue, and is more conducive to the recovery and healing of the fracture site. [0003] However, the current intramedullary nail technology has a big problem: after the intramedullary nail is implanted in the medullary cavity, in order for the locking screw to easily enter the locking hole of the intramedullary nail, the diameter of the locking hole of the intramedullary nail must be...

Claims

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Application Information

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IPC IPC(8): A61B17/72
CPCA61B17/7216
Inventor 危杰郭小山胡小文韦冬
Owner 危杰
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