CN211094600U - Self-tapping bone screw and fracture fixation system - Google Patents
Self-tapping bone screw and fracture fixation system Download PDFInfo
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- CN211094600U CN211094600U CN201921884162.0U CN201921884162U CN211094600U CN 211094600 U CN211094600 U CN 211094600U CN 201921884162 U CN201921884162 U CN 201921884162U CN 211094600 U CN211094600 U CN 211094600U
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- bone screw
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 150
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 86
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 238000005553 drilling Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
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Abstract
A self-tapping bone nail and a fracture fixing system are provided, the self-tapping bone nail is used for being in threaded connection with a bone, the self-tapping bone nail comprises a positioning part and a fixing part which are connected, a positioning blade used for being abutted against the bone is arranged at the end part, far away from the fixing part, of the positioning part, and the positioning blade is of a linear structure; the outer peripheral surface of the fixing part is provided with an external thread for screwing into the bone. The self-tapping bone nail is firmly positioned when in contact with the bone surface, is not easy to slip, does not need pre-drilling, and improves the operation efficiency.
Description
Technical Field
The utility model relates to a medical equipment field particularly, relates to a self tapping bone nail and fracture fixing system.
Background
At present, the market demand of bone nails is large, and the combination of the bone nails and the external frame is widely applied to emergency treatment.
The research shows that the bone nail in the prior art has the following defects when being applied to fracture fixation surgery:
the existing bone nail is inconvenient to position when being fixed with the bone.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a self tapping bone nail and fracture fixing system, its stability when can improving bone nail and bone contact, and then the self tapping bone nail screw in bone of being convenient for does not need the pre-drilling, and direct and bone contact just adopt self-tapping mode to realize with the bone spiro union, shorten the operation time, reduce the operation risk.
The embodiment of the utility model is realized like this:
in a first aspect, embodiments provide a self-tapping bone screw for screwing with a bone, the self-tapping bone screw comprising:
the end part of the positioning part, which is far away from the fixing part, is provided with a positioning blade which is used for abutting against the bone, and the positioning blade is of a linear structure; the outer peripheral surface of the fixing part is provided with an external thread for screwing into the bone.
In an alternative embodiment, the linear structure extends perpendicular to the axis of the self-tapping bone screw.
In an alternative embodiment, the positioning portion is provided with a speed groove, and one end of the speed groove extends to the positioning blade.
In an alternative embodiment, two speed grooves are provided, and the two speed grooves are arranged at intervals along the circumferential direction of the positioning portion.
In an alternative embodiment, the two speed grooves are rotationally symmetrical and have a rotation angle of 180 degrees, the distance between the groove bottoms of the two speed grooves on the side close to the fixing part is L, and D is more than or equal to 3L, wherein D refers to the outer diameter of the external thread of the fixing part.
In an alternative embodiment, the anchoring portion includes a guide section connected to the positioning portion, the guide section having a taper, and the taper angle α of the guide section being [10 °, 30 ° ].
In an alternative embodiment, two speed grooves have a first contact surface and a second contact surface therebetween, and the first contact surface and the second contact surface intersect to form a positioning edge.
In an alternative embodiment, the locating portion has a taper, the taper angle β of the locating portion being [80 °, 160 ° ].
In an alternative embodiment, the fastening portion is provided with a self-tapping flute which extends helically along the length of the fastening portion.
In a second aspect, embodiments provide a fracture fixation system comprising:
the self-tapping bone screw of any one of the preceding embodiments.
The embodiment of the utility model provides a beneficial effect is:
in summary, the present embodiment provides a self-tapping bone nail, in the fixed operation process of fracture, utilize the location sword on the location portion of self-tapping bone nail and bone butt, because the location sword is the linear type structure, has certain length, can increase the area of contact with the bone surface, the difficult slip when location sword and bone surface contact. Or, when the location sword and the bone face are the point contact, the position of location sword and bone face contact is located between two endpoints of location sword, be difficult for skidding when equally can guaranteeing location sword and bone face contact, the location of self tapping bone nail is accurate, self tapping bone nail can realize in the direct screw in bone with the spiro union of bone fixed, need not carry out the predrilling before the screw in self tapping bone nail on the bone face or on the locating plate and fix a position self tapping bone nail, the operation step has been reduced, the operation time has been shortened, the operation risk has been reduced.
The embodiment also provides a fracture fixing system, which comprises the self-tapping bone nail, so that pre-drilling is not needed in the fracture operation process, the operation time is shortened, and the operation risk is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a self-tapping bone screw according to an embodiment of the present invention;
fig. 2 is a schematic top view of a self-tapping bone screw according to an embodiment of the present invention;
FIG. 3 is a schematic view of a partial structure of a self-tapping bone screw according to an embodiment of the present invention;
fig. 4 is another partial structural view of the self-tapping bone screw according to the embodiment of the present invention.
Icon:
100-self-tapping bone nail; 110-a positioning section; 111-a positioning edge; 112-speed slot; 113-a first contact surface; 114-a second contact surface; 120-a stationary part; 121-a guide section; 122-a screw-in section; 123-a handle section; 124-self-tapping chip groove; 125-external threads; 130-a first chip edge; 140-second cutting edge.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the self-tapping bone screw 100 according to the present embodiment is mainly suitable for fixing a fracture site, and can be directly screwed into a bone to fix the fracture site, and during the bone fixation process, the self-tapping bone screw 100 is firmly positioned with the bone surface, and can directly contact with the bone surface and be drilled into the bone without pre-drilling the bone surface, thereby saving the pre-drilling step and saving the operation time.
Referring to fig. 1, the self-tapping bone screw 100 provided in this embodiment includes a positioning portion 110 and a fixing portion 120 connected to each other, wherein an end of the positioning portion 110 away from the fixing portion 120 has a positioning blade 111 for abutting against a bone, and the positioning blade 111 is configured to be a linear structure; the outer circumferential surface of the fixing portion 120 is provided with external threads 125 for screwing into the bone.
In the present embodiment, a self-tapping bone nail 100 is provided, in which a positioning blade 111 of a positioning portion 110 of the self-tapping bone nail 100 is first brought into contact with a bone to perform positioning during a fracture fixation operation. Because the positioning blade 111 is of a linear structure and has a certain length, the contact area between the positioning blade 111 and the bone surface can be increased, and the positioning blade 111 is not easy to slip when contacting the bone surface. Or, in the operation process, when the self-tapping bone nail 100 is in contact with the arc-shaped bone surface, at this moment, the positioning blade 111 is in point contact with the bone surface, the position of the positioning blade 111 in contact with the bone surface is located between two end points of the positioning blade 111, the positioning blade 111 is also ensured to be not easy to slip when in contact with the bone surface, the self-tapping bone nail 100 is accurately positioned, the self-tapping bone nail 100 can be directly screwed into the bone to be fixed with the bone in a threaded manner, pre-drilling on the bone surface or a positioning plate before screwing in the self-tapping bone nail 100 to position the self-tapping bone nail 100 is not needed, the operation steps are reduced, the operation time is shortened, and the operation risk is reduced. After the positioning part 110 enters the bone, since the fixing part 120 is provided with the external thread 125, the self-tapping bone screw 100 can be finally screwed into the bone to be fixed to the bone.
Referring to fig. 1 and 4, in the present embodiment, the positioning portion 110 is a pointed end, and the positioning portion 110 is screwed into a bone after contacting with the bone surface and has a small friction force, so as to guide the self-tapping bone screw 100 into the bone, the positioning blade 111 is a position where the positioning portion 110 is farthest from the fixing portion 120, and the positioning blade 111 first contacts with the bone surface during surgery, so as to perform an initial positioning function, the positioning portion 110 is optionally substantially conical, and the conical angle β of the positioning portion 110 is [80 °, 160 ° ], for example, the conical angle β of the positioning portion 110 may be 80 °, 120 °, 160 °, or the like.
Alternatively, the positioning blade 111 extends in a direction perpendicular to the axis of the self-tapping bone screw 100. It should be understood that the self-tapping bone screw 100 has a cylindrical shape, and alternatively, the positioning part 110 and the fixing part 120 are coaxially disposed, and the axis of the self-tapping bone screw 100 is also the axis of the fixing part 120. The extending direction of the positioning blade 111 is set to be perpendicular to the axis of the self-tapping bone nail 100, when the self-tapping bone nail 100 is used, the self-tapping bone nail 100 is kept in contact with a bone in a state of being perpendicular to the bone surface, and when a force is applied to screw the self-tapping bone nail 100 into the bone, a component force having an included angle with the axis of the self-tapping bone nail 100 is not easily generated, so that the self-tapping bone nail 100 is not easy to slip, and the self-tapping bone nail 100 is more convenient to screw into the bone.
Obviously, in other embodiments, the positioning edge 111 of the self-tapping bone nail 100 may be designed to be non-perpendicular to the axis of the self-tapping bone nail 100, depending on the surgical needs.
Referring to fig. 2, optionally, two speed grooves 112 are disposed on the positioning portion 110, the two speed grooves 112 are disposed on two sides of the extending direction of the positioning blade 111, and one side of each speed groove 112 away from the fixing portion 120 extends to the positioning blade 111, in other words, one side of each speed groove 112 away from the fixing portion 120 extends toward the positioning blade 111 and two ends of the positioning blade 111 are connected to the bottom of the speed groove 112. The speed slot 112 may be an arcuate slot, and it will be appreciated that in other embodiments, the speed slot 112 may be other shaped slot configurations.
Optionally, the two speed grooves 112 are rotationally symmetrical, optionally, the rotation angles of the two speed grooves 112 are 180 degrees, the distance between the groove bottoms of the two speed grooves 112 on the side close to the fixing portion 120 is L, and D is greater than or equal to 3L, wherein D is the outer diameter of the external thread 125 of the fixing portion 120.
Further, the positioning portion 110 further has a first contact surface 113 and a second contact surface 114, both the first contact surface 113 and the second contact surface 114 are convex surfaces, the first contact surface 113 and the second contact surface 114 are located between the two speed grooves 112, and the intersection line of the first contact surface 113 and the second contact surface 114 is the positioning blade 111. In the process of screwing the self-tapping bone nail 100 into the bone, the positioning blade 111 firstly enters the bone, then partial bone fragments enter the rapid groove 112 to fill the rapid groove 112, and meanwhile, the first contact surface 113 and the second contact surface 114 are in contact with the bone, so that no gap exists between the part of the positioning part 110 screwed into the bone and the bone, the contact area of the part of the positioning part 110 screwed into the bone is large, the part of the positioning part 110 screwed into the bone is not easy to shift, the deviation of drilling is not easy to occur, and the operation quality is improved. Meanwhile, the first contact surface 113 and the second contact surface 114 are convex surfaces, so that the friction force is small when the first contact surface and the second contact surface are in contact with bones, the heat generated by friction is reduced, and the operation is favorably implemented.
It should be noted that, in the present embodiment, the positioning blade 111 is formed by two speed grooves 112, a first contact surface 113 and a second contact surface 114, in other words, groove walls of the two speed grooves 112 define the length of the positioning blade 111, and the first contact surface 113 and the second contact surface 114 define the extending direction of the positioning blade 111.
Referring to fig. 1 and 3, in the present embodiment, the fixing portion 120 is substantially cylindrical, and the outer circumference of the fixing portion 120 is provided with external threads 125, wherein the thread pitch or pitch of the external threads 125 is equal, and optionally, the fixing portion 120 has a guiding section 121, a screwing-in section 122, and a handle section 123, which are coaxially and sequentially connected, and the external threads 125 are distributed on the guiding section 121 and the screwing-in section 122, the guiding section 121 is substantially conical, in other words, the guiding section 121 has a taper angle α [ [10 °, 30 ° ] ] and the guiding section 121 has a taper angle α of, for example, 10 °, 20 °, 30 °, etc., so as to guide the self-tapping bone screw 100 to screw into the bone, and the screwing-in section 122 has an equal inner diameter and outer diameter.
Optionally, the fixing portion 120 is provided with a self-tapping chip groove 124, and the self-tapping chip groove 124 extends along the axis of the fixing portion 120 and spirally around the circumference of the fixing portion 120. The self-tapping flutes 124 communicate with the speed grooves 112. Optionally, the self-tapping flutes 124 extend away from an end of the speed groove 112 to the screw-in section 122. In the process of screwing the self-tapping bone nail 100 into the bone, the bone chips are conveniently discharged from the self-tapping chip groove 124, and the use of the self-tapping bone nail 100 is not easily affected.
It should be noted that the number of the self-tapping flutes 124 is set as needed, the number of the self-tapping flutes 124 may be one or multiple, and when the number of the self-tapping flutes 124 is multiple, the multiple self-tapping flutes 124 are arranged at intervals along the circumferential direction of the fixing portion 120.
The first cutting edge 130 is formed at a position where one side of the speed groove 112 intersects the first contact surface 113. A second cutting edge 140 is formed at a position where one side of the self-tapping flute 124 intersects with the outer circumferential surface of the fixing portion 120. When the self-tapping bone nail 100 is used, the positioning blade 111 is in contact with the bone surface, the self-tapping bone nail 100 is rotated, the first cutting blade 130 cuts oblique bone so that the positioning part 110 is inserted into the bone, and after the bone is inserted to a certain depth, the first cutting blade 130 and the second cutting blade 140 cut oblique bone together until the self-tapping bone nail 100 is screwed into a set depth.
The self-tapping bone screw 100 provided by the embodiment is firmly positioned with the bone surface, is not easy to slip, does not need pre-drilling, and improves the operation efficiency and the success rate.
The embodiment also provides a fixing system, which comprises the self-tapping bone nail 100 mentioned in the above embodiment, when the fracture position is fixed, the self-tapping bone nail 100 is directly screwed into the bone, is contacted with the bone surface through the positioning blade 111, is firmly positioned with the bone surface, is not easy to slip, does not need pre-drilling, and improves the operation efficiency and the success rate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A self-tapping bone screw for threaded engagement with bone, the self-tapping bone screw comprising:
the end part of the positioning part, which is far away from the fixing part, is provided with a positioning blade which is used for abutting against the bone, and the positioning blade is of a linear structure; the outer peripheral surface of the fixing part is provided with external threads for screwing into the bone.
2. The self-tapping bone screw of claim 1, wherein:
the extension direction of the linear structure is perpendicular to the axis of the self-tapping bone nail.
3. The self-tapping bone screw of claim 1, wherein:
the positioning part is provided with a speed groove, and one end of the speed groove extends to the positioning blade.
4. The self-tapping bone screw of claim 3, wherein:
the two speed grooves are arranged at intervals along the circumferential direction of the positioning part.
5. The self-tapping bone screw of claim 4, wherein:
the distance between the groove bottoms of the two speed grooves close to one side of the fixing part is L, and D is larger than or equal to 3L, wherein D refers to the outer diameter of the external thread of the fixing part.
6. The self-tapping bone screw of claim 4, wherein:
a first contact surface and a second contact surface are arranged between the two speed grooves, and the first contact surface and the second contact surface are intersected to form the positioning edge.
7. The self-tapping bone screw of claim 1, wherein:
the fixing portion includes a guide section connected to the positioning portion, the guide section having a taper, and a taper angle α of the guide section being [10 °, 30 ° ].
8. The self-tapping bone screw of claim 1, wherein:
the locating portion has a taper, the taper angle β of the locating portion being [80 °, 160 ° ].
9. The self-tapping bone screw of claim 1, wherein:
the fixing part is provided with a self-tapping chip groove, and the self-tapping chip groove extends in a spiral line shape along the length direction of the fixing part.
10. A fracture fixation system, characterized in that it comprises:
a self-tapping bone screw as defined in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921884162.0U CN211094600U (en) | 2019-11-04 | 2019-11-04 | Self-tapping bone screw and fracture fixation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921884162.0U CN211094600U (en) | 2019-11-04 | 2019-11-04 | Self-tapping bone screw and fracture fixation system |
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| Publication Number | Publication Date |
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| CN211094600U true CN211094600U (en) | 2020-07-28 |
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| CN201921884162.0U Active CN211094600U (en) | 2019-11-04 | 2019-11-04 | Self-tapping bone screw and fracture fixation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114376699A (en) * | 2020-10-05 | 2022-04-22 | 铂泰生医股份有限公司 | Bone screw |
-
2019
- 2019-11-04 CN CN201921884162.0U patent/CN211094600U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114376699A (en) * | 2020-10-05 | 2022-04-22 | 铂泰生医股份有限公司 | Bone screw |
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Effective date of registration: 20240426 Address after: 200135 Room 202, building 4, No. 590, Ruiqing Road, east zone of Zhangjiang High tech industry, Pudong New Area, Shanghai Patentee after: Shanghai Dabo Medical Technology Co.,Ltd. Country or region after: China Address before: No. 18 Shanbian Hongdong Road, Haicang District, Xiamen City, Fujian Province, 361000 Patentee before: DOUBLE MEDICAL TECHNOLOGY Inc. Country or region before: China |