CN216090737U - Medical pressurizing screw sleeve - Google Patents
Medical pressurizing screw sleeve Download PDFInfo
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- CN216090737U CN216090737U CN202122492987.1U CN202122492987U CN216090737U CN 216090737 U CN216090737 U CN 216090737U CN 202122492987 U CN202122492987 U CN 202122492987U CN 216090737 U CN216090737 U CN 216090737U
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- screw sleeve
- head
- central hole
- bone
- washer
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Abstract
The utility model relates to a medical pressurizing screw sleeve which comprises a rod part and a head part, wherein a central hole is formed in the rod part, and an internal thread is formed in the wall of the central hole; the head and the rod are integrally arranged, and the head is provided with an assembling groove. The screw sleeve can be matched with the bone fracture plate, so that the fixation of free broken bone blocks on the opposite side of the bone fracture plate is realized, and the treatment effect of fracture or osteoporosis is ensured.
Description
Technical Field
The utility model belongs to the technical field of orthopedic medical instruments, and particularly relates to a medical compression screw sleeve.
Background
In the bone surgery, the bone fracture plate is generally fixed at the fracture or osteoporosis part by screws, but free broken bone blocks at the opposite side of the bone fracture plate cannot be fixed, so that the treatment effect is directly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a medical pressure screw sleeve to solve the problem that free broken bone blocks on the opposite side of a bone fracture plate cannot be fixed.
The medical pressurizing screw sleeve is realized by the following steps:
a medical pressure screw sleeve comprises
The rod part is internally provided with a central hole, and the hole wall of the central hole is provided with an internal thread;
a head portion integrally provided with the rod portion, and the head portion is provided with an assembly groove.
Further, the assembling groove is connected with the central hole through a communication hole, and the inner diameter of the communication hole is smaller than that of the central hole.
Further, one end of the rod part, which is far away from the head part, is of a conical structure.
Furthermore, an annular bulge is arranged on the outer annular surface of the head, and the side surface of the annular bulge facing the rod part is an outward convex arc-shaped surface I.
Further, the device also comprises a gasket sleeved on the head.
Further, the minimum inner diameter of the washer is larger than the outer diameter of the rod part, and the maximum inner diameter of the washer is smaller than the outer diameter of the annular protrusion.
Furthermore, an arc-shaped surface II which is concave outwards is arranged on the inner ring surface of the gasket.
After the technical scheme is adopted, the utility model has the beneficial effects that:
the screw sleeve can be matched with the bone fracture plate, so that the fixation of free broken bone blocks on the opposite side of the bone fracture plate is realized, and the treatment effect of fracture or osteoporosis is ensured.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
FIG. 1 is an axial cross-sectional view of a medical compression screw sleeve (without a washer) according to a preferred embodiment of the present invention;
FIG. 2 is an axial cross-sectional view of a washer of a medical compression screw sleeve according to a preferred embodiment of the present invention;
FIG. 3 is a view showing one of the states of use of the medical compression screw sleeve according to the preferred embodiment of the present invention;
FIG. 4 is a view of one of the states of use of the medical compression screw sleeve according to the preferred embodiment of the present invention;
FIG. 5 is a view showing one of the states of use of the medical compression screw sleeve according to the preferred embodiment of the present invention;
in the figure: the bone fracture plate comprises a rod part 11, a head part 12, a central hole 13, an assembly groove 14, a communication hole 15, an annular bulge 16, an arc surface I17, a gasket 18, an arc surface II 19, the bone fracture plate 2, bone screws 3, free broken bone pieces 4 and bones 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1 to 5, a medical compression screw sleeve comprises a rod part 11 and a head part 12, wherein a central hole 13 is formed inside the rod part 11, and an internal thread is formed on the wall of the central hole 13; the head 12 is provided integrally with the stem 11, and the head 12 is provided with a fitting groove 14.
Specifically, the rod part 11 is of a cylindrical structure, the central hole 13 and the rod part 11 are coaxially arranged, and internal threads inside the rod part can be conveniently matched with the bone screws 3 on the bone fracture plate 2 in threaded connection.
Preferably, to facilitate the installation of the screw bosses, the assembly grooves 14 are internal hexagonal grooves so that they can be operated with an internal hexagonal wrench.
The assembling grooves 14 are not limited to the above-mentioned inner hexagonal structure, but may be formed by a quincunx groove, an inner pentagonal corner, a cross-shaped structure, and the assembling grooves of different shapes may be operated by a corresponding wrench.
In order to facilitate positioning with the bone screw 3, the fitting groove 14 is connected to the central hole 13 through the communication hole 12, and the inner diameter of the communication hole 15 is smaller than that of the central hole 13.
When the bone screw is used, the kirschner wire is firstly driven into the bone 5 for guiding, then the hollow bone screw 3 or the universal locking nail is screwed in along the kirschner wire, and then the screw sleeve is screwed in along the kirschner wire on the opposite side, so that the positioning accuracy between the screw sleeve and the bone screw 3 is ensured.
The kirschner wires can pass through the assembly grooves 14, the communication holes 15 and the central hole 13 in sequence to temporarily fix the free broken bone pieces 4.
The inner diameter of the communication hole 15 is smaller than that of the center hole 13, and the strength of the connection between the stem portion 11 and the head portion 12 can be effectively ensured.
In treatment, the screw cap needs to penetrate into the free fragment 4, and in order to facilitate the installation of the screw cap, the end of the shaft 11 away from the head 12 is of a conical structure.
Specifically, the outer diameter of the end of the shaft 11 away from the head 12 is smaller than the outer diameter of the shaft 11.
In order to achieve a good compression fixation effect on the free bone fragments 4, an annular protrusion 16 is arranged on the outer annular surface of the head 12, and the side surface of the annular protrusion 16 facing the rod part 11 is an arc surface I17 which is convex outwards.
The setting of arcwall face I17 can conveniently be according to the nail way angle installation screw cover of bone screw 3 to guarantee the screw cover and the free broken bone piece 4 between the stability of complex.
Specifically, the outer diameter of the annular protrusion 16 is larger than the outer diameter of the rod portion 11, which can effectively ensure the pressing and fixing effect.
In order to ensure the fixing effect of the free bone fragments 4 of the osteoporotic patient, the screw cap further comprises a washer 18 which is fitted over the head 12.
Preferably, the washer 18 has an outer diameter greater than the outer diameter of the annular projection 16, which further ensures the fixation of the free fragment 4.
In order to be able to place the washer 18 on the head 12, the minimum internal diameter of the washer 18 is greater than the external diameter of the stem 11 and the maximum internal diameter of the washer 18 is less than the external diameter of the annular projection 16.
In order to be able to cooperate with the annular projection 16 of the head 12, and thus to guarantee the fixing effect, the inner annular surface of the washer 18 is provided with an arc ii 19, which is concave outwards.
When the gasket 18 is matched with the head 12, the concave arc-shaped surface II 19 is matched with the convex arc-shaped surface I17 on the annular bulge 16, so that the head 12 is stably matched with the gasket 18.
When the bone fracture plate is used for orthopedic surgery, a screw sleeve is screwed in the direction of the nail path of the bone screw 3 on the opposite side of the bone fracture plate 2, the internal thread of the screw sleeve is matched with the thread of the bone screw 3, so that the free broken bone block 4 on the opposite side of the bone fracture plate 2 is pressed and fixed, and a stable structure is formed with the bone fracture plate 2 and the bone screw 3, so that the free broken bone block 4 and the bone 5 are firmly fixed together.
The utility model has the advantages that the whole structure is simple, adopts little incision minimal access surgery mode, can 2 offside free broken bone pieces 4 of fixed coaptation board accurately, guarantees the effect of fracture treatment, is applicable to the osteoporosis patient.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. A medical pressure screw sleeve is characterized by comprising
The rod part (11) is internally provided with a central hole (13), and the hole wall of the central hole (13) is provided with an internal thread;
a head (12) provided integrally with the rod (11), the head (12) being provided with an assembly groove (14).
2. The medical compression screw sleeve as claimed in claim 1, wherein the fitting groove (14) is connected with the central hole (13) through a communication hole (15), and the inner diameter of the communication hole (15) is smaller than that of the central hole (13).
3. The medical compression screw sleeve as claimed in claim 1, characterised in that the end of the shank (11) remote from the head (12) is of conical configuration.
4. The medical compression screw sleeve as claimed in claim 1, wherein an annular protrusion (16) is provided on the outer circumferential surface of the head (12), and the side surface of the annular protrusion (16) facing the shaft (11) is an arc surface I (17) which is convex.
5. The medical compression screw sleeve as claimed in claim 4, further comprising a washer (18) fitted over the head (12).
6. Medical compression screw sleeve according to claim 5, wherein the smallest inner diameter of the washer (18) is larger than the outer diameter of the shank (11), and the largest inner diameter of the washer (18) is smaller than the outer diameter of the annular protrusion (16).
7. The medical compression screw sleeve as claimed in claim 5, wherein the washer (18) is provided with an outer concave arc surface II (19) on its inner annular surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122492987.1U CN216090737U (en) | 2021-10-15 | 2021-10-15 | Medical pressurizing screw sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122492987.1U CN216090737U (en) | 2021-10-15 | 2021-10-15 | Medical pressurizing screw sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216090737U true CN216090737U (en) | 2022-03-22 |
Family
ID=80693117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122492987.1U Active CN216090737U (en) | 2021-10-15 | 2021-10-15 | Medical pressurizing screw sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216090737U (en) |
-
2021
- 2021-10-15 CN CN202122492987.1U patent/CN216090737U/en active Active
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