CN215129861U - Degradable bone nail for orthopedics - Google Patents
Degradable bone nail for orthopedics Download PDFInfo
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- CN215129861U CN215129861U CN202022833614.1U CN202022833614U CN215129861U CN 215129861 U CN215129861 U CN 215129861U CN 202022833614 U CN202022833614 U CN 202022833614U CN 215129861 U CN215129861 U CN 215129861U
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Abstract
The utility model provides a degradable bone nail for orthopedics belongs to the internal fixation treatment technical field of femoral neck fracture, include: the bone nail comprises a bone nail body and a degradation coating, wherein the bone nail body is made of magnesium materials, the interior of the bone nail body is hollow, the outer side walls of the head portion and the tail portion are respectively provided with a first external thread and a second external thread, the head end of the head portion of the bone nail body is self-tapping, the pitch of the first external thread is 1.6-3.0mm, the thread length is 8-32mm, the tail end of the tail portion of the bone nail body is provided with an outer hexagonal screw hole, the pitch of the second external thread is 0.8-1.5mm, the aperture of the outer hexagonal screw hole is 4mm, the hole depth is 3-5mm, the degradation coating is made of degradation materials degraded in a human body and is coated on the outer side wall of the bone nail body, and the degradation rate of the degradation materials of the degradation coating is lower than that of the magnesium materials of the bone nail body. The utility model solves the problem that the bone nail needs to be taken out in vivo in the prior internal fixation treatment method of femoral neck fracture.
Description
The technical field is as follows:
the utility model belongs to the technical field of the internal fixation treatment of femoral neck fracture, concretely relates to degradable bone nail for orthopedics.
Background art:
the internal fixation treatment method for femoral neck fracture generally adopts three hollow cancellous bone nails for fixation, and by adopting the mode, the internal fixation treatment method has the advantages of simple operation, small wound and reliable fixation. If the bone nail can be prevented from being taken out of the body, the rehabilitation progress of the patient is accelerated.
Therefore, there is a need for a degradable bone screw for bone that avoids the removal of the bone screw in vivo.
The utility model has the following contents:
the embodiment of the utility model provides a degradable bone nail for orthopedics has solved the problem that the bone nail need be taken out in vivo among the internal fixation treatment method of current femoral neck fracture.
The embodiment of the utility model provides a degradable bone nail for orthopedics, include:
the bone nail comprises a bone nail body, a head part and a tail part, wherein the bone nail body is made of magnesium materials, the interior of the bone nail body is hollow, a first external thread and a second external thread are respectively arranged on the outer side walls of the head part and the tail part, the head end of the head part of the bone nail body adopts a self-tapping head, the pitch of the first external thread is 1.6-3.0mm, the length of the thread is 8-32mm, an external hexagonal screw hole and the pitch of the second external thread are 0.8-1.5mm are arranged on the tail end of the tail part of the bone nail body, the aperture of the external hexagonal screw hole is 4mm, and the depth of the external hexagonal screw hole is 3-5 mm;
the degradable coating is made of degradable materials which are degraded in a human body and is coated on the outer side wall of the bone nail body, and the degradable coating completely covers the outer side wall of the bone nail body;
the degradation rate of the degradation material of the degradation coating is lower than that of the magnesium material of the bone nail body.
In certain embodiments, the first external thread pitch is 1.6-2.0 mm.
In certain embodiments, the first external thread is 10-30mm long.
In certain embodiments, the second external thread pitch is 1.0-1.5 mm.
In certain embodiments, the degradation coating is a zinc-copper alloy coating.
In certain embodiments, the degradation coating is a bioceramic coating.
The embodiment of the utility model provides an adopt the degradation coating that can degrade in the human body to this degradation coating is less than the degradation rate of the bone nail body of magnesium matter in the human body, and this can guarantee that the bone nail body does not degrade in a period after the operation treatment, ensures pressurization and fixed action, can avoid the problem that the bone nail body was taken out at last simultaneously. The magnesium bone nail body is designed with parameters such as hole depth, thread pitch, thread length and the like according to the characteristics of magnesium metal, is designed to adapt to the characteristic of softer magnesium metal, and ensures that deformation or thread slipping cannot occur when a tool is used for placing the nail. The tail end of the tail part of the bone nail body adopts an outer hexagonal design, and compared with an inner hexagonal tail part design, the problem of thread sliding caused by deformation is not easy to occur in the screwing process; the head end of the bone nail body adopts the self-tapping head, so that the bone nail can conveniently drill into the bone. The screw pitch of the head part of the bone nail body is larger than that of the tail part of the bone nail body, so that extrusion forces can be formed on two sides of a fracture surface in the process of drilling the bone nail body into a bone, and the purpose of pressurizing and fixing is further realized; the degradable bone nail for orthopedics solves the problem that the bone nail needs to be taken out in vivo in the existing internal fixation treatment method of femoral neck fracture.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Description of the drawings:
the accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the tail end of the nail body;
reference numerals: 10. a bone nail body; 101. a head portion; 1011. a head end; 102. a tail portion; 1021. tail end of tail; 103. a first external thread; 104. a second external thread; 105. an outer hexagonal screw hole; 20. and (4) degrading the coating.
The specific implementation mode is as follows:
in order to make the technical solution of the present invention's purpose, technical solution and advantages clearer, the following description will be combined with the drawings of the specific embodiments of the present invention, to carry out clear and complete description on the technical solution of the embodiments of the present invention. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
As shown in fig. 1-2, the present embodiment provides a degradable bone nail for orthopedics department, comprising: a bone nail body 10 and a degradable coating 20.
The bone nail body 10 is made of magnesium material, is hollow inside, and is provided with a first external thread 103 and a second external thread 104 on the outer side walls of the head part 101 and the tail part 102 respectively.
The head end 1011 of the bone nail body 10 adopts a self-tapping head, the thread pitch of the first external thread 103 is 1.6-3.0mm, and the thread length is 8-32mm,
preferably, the pitch of the first external thread 103 is 1.6-2.0mm and the thread length of the first external thread 103 is 10-30 mm.
The tail end 1021 of the tail part of the bone nail body 10 is provided with an outer hexagonal screw hole 105 and a second external thread 104, the thread pitch is 0.8-1.5mm, and preferably, the thread pitch of the second external thread 104 is 1.0-1.5 mm; the outer hexagonal screw hole 105 has an aperture of 4mm and a depth of 3-5 mm.
The degradable coating 20 is made of degradable materials which are degraded in the human body and is coated on the outer side wall of the bone nail body 10, the degradable coating 20 completely covers the outer side wall of the bone nail body 10,
the degradation rate of the degradable material of the degradable coating 20 is lower than the degradation rate of the magnesium material of the bone nail body 10.
Preferably, the degradation coating 20 is a zinc-copper alloy coating or a bioceramic coating, and the degradation rate of the zinc-copper alloy coating or the bioceramic coating in a human body is far lower than that of magnesium, so that the non-degradation time of the bone nail body 10 is remarkably prolonged, and the pressurizing and fixing effects are enhanced.
Advances in biomaterials have provided new materials for new bone screws. Such as polylactic acid, magnesium metal, etc. Polylactic acid is not good for the healing of bones and surrounding tissues because the products of the polylactic acid degradation in vivo are acidic. The magnesium degradation product is alkalescent, and magnesium is one of four metal cations in the human body, and documents show that the magnesium degradation product also has the effect of promoting bone healing.
The embodiment of the utility model provides an adopt the degradation coating 20 that can degrade in the human body to this degradation coating 20 is less than the degradation rate of the bone nail body 10 of magnesium matter in the human body, and this can guarantee that bone nail body 10 does not degrade in a period after the operation treatment, ensures pressurization and fixed action, can avoid the problem that bone nail body 10 was taken out at last simultaneously. The magnesium bone nail body 10 is designed with parameters such as hole depth, thread pitch, thread length and the like according to the characteristics of magnesium metal, is designed to adapt to the softer characteristic of the magnesium metal, and ensures that deformation or thread slipping cannot occur when a tool is used for placing the nail. Compared with the design of the tail part 102 of the inner hexagon, the tail end 1021 of the bone nail body 10 adopts the outer hexagon design, so that the problem of thread slipping caused by deformation is not easy to occur in the screwing process; the head end 1011 of the bone nail body 10 adopts a self-tapping head, so that the bone nail can be conveniently drilled into the bone. The screw pitch of the head part 101 of the bone nail body 10 is larger than that of the tail part 102 thereof, so that the pressing force can be formed on two sides of the fracture surface in the process of drilling the bone nail body into the bone, and the purpose of pressure fixation is further realized. The degradable bone nail for orthopedics solves the problem that the bone nail needs to be taken out in vivo in the existing internal fixation treatment method of femoral neck fracture.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the technical means, but also comprises the technical scheme consisting of the equivalent replacement of the technical features. The present invention is not to be considered as the best thing, and belongs to the common general knowledge of the technicians in the field.
Claims (6)
1. A degradable bone nail for orthopedics department, characterized by comprising:
the bone nail comprises a bone nail body (10) made of magnesium material, wherein the interior of the bone nail body is hollow, and the outer side walls of a head part (101) and a tail part (102) are respectively provided with a first external thread (103) and a second external thread (104), the head end (1011) of the head part of the bone nail body (10) adopts a self-tapping head, the thread pitch of the first external thread (103) is 1.6-3.0mm, the thread length is 8-32mm, the tail end (1021) of the tail part of the bone nail body (10) is provided with an external hexagonal screw hole (105) and the thread pitch of the second external thread (104) is 0.8-1.5mm, the aperture of the external hexagonal screw hole (105) is 4mm, and the hole depth is 3-5 mm;
the degradable coating (20) is made of degradable materials which are degraded in a human body and is coated on the outer side wall of the bone nail body (10), and the degradable coating (20) completely covers the outer side wall of the bone nail body (10);
the degradation rate of the degradation material of the degradation coating (20) is lower than that of the magnesium material of the bone nail body (10).
2. The degradable bone nail for orthopedics department according to claim 1, characterized in that: the thread pitch of the first external thread (103) is 1.6-2.0 mm.
3. The degradable bone nail for orthopedics department according to claim 1, characterized in that: the thread length of the first external thread (103) is 10-30 mm.
4. The degradable bone nail for orthopedics department according to claim 1, characterized in that: the thread pitch of the second external thread (104) is 1.0-1.5 mm.
5. The degradable bone nail for orthopedics department according to claim 1, characterized in that: the degradation coating (20) adopts a zinc-copper alloy coating.
6. The degradable bone nail for orthopedics department according to claim 1, characterized in that: the degradation coating (20) adopts a biological ceramic coating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022833614.1U CN215129861U (en) | 2020-11-30 | 2020-11-30 | Degradable bone nail for orthopedics |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022833614.1U CN215129861U (en) | 2020-11-30 | 2020-11-30 | Degradable bone nail for orthopedics |
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| CN215129861U true CN215129861U (en) | 2021-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114305637A (en) * | 2021-12-31 | 2022-04-12 | 闻客医学科技(苏州)有限公司 | Degradable magnesium alloy bone screw and preparation method thereof |
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2020
- 2020-11-30 CN CN202022833614.1U patent/CN215129861U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114305637A (en) * | 2021-12-31 | 2022-04-12 | 闻客医学科技(苏州)有限公司 | Degradable magnesium alloy bone screw and preparation method thereof |
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