CN111035443A - Double-rod fixing block - Google Patents
Double-rod fixing block Download PDFInfo
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- CN111035443A CN111035443A CN201911367865.0A CN201911367865A CN111035443A CN 111035443 A CN111035443 A CN 111035443A CN 201911367865 A CN201911367865 A CN 201911367865A CN 111035443 A CN111035443 A CN 111035443A
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- hole
- connecting rod
- screw
- rod
- screw hole
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
Abstract
The embodiment of the invention relates to a double-rod fixing block, which comprises: an upper edge portion including an upper fixing screw-coupling hole; the lower edge part, the upper edge part includes the lower fixed screw hole, set up with the upper fixed screw hole relatively, there are whorls on the hole wall of the lower fixed screw hole; a first connecting rod through hole positioned at one side of the connection part of the upper edge part and the lower edge part; a second connecting rod through hole positioned at the other side of the connecting part of the upper edge part and the lower edge part; the first side opening is arranged at the side of the first connecting rod through hole of the upper fixing screw hole and the lower fixing screw hole; the second side opening is formed in the through hole side of the second connecting rod of the upper fixing screw hole and the lower fixing screw hole; the device has the advantages of simple design structure, convenient assembly, flexible use, obvious clinical effect, strong adaptability and low manufacturing cost.
Description
Technical Field
The invention relates to the field of orthopedic medical instruments, in particular to a double-rod fixing block.
Background
At present, with the development of medicine, the traditional orthopedic implants mainly comprise steel plates and intramedullary nails, and with the continuous improvement and perfection of fixing devices, various types of steel plates, intramedullary nails, external fixators, memory alloy series fixing devices and the like are developed.
The fixing device is particularly applied to the process of fracture fixation and bone orthopedic correction, a matched steel plate and a corresponding fixing device cannot be obtained, and the steel plate and the intramedullary nail have the problems of stress shielding, stress concentration and stress shielding. External bone fixation devices often fail to serve as a final fixation device due to post-operative infection. In addition, in the existing apparatus using the connecting rod and the clamping block as the connecting and fixing device, the clamping block and the connecting rod slide and rotate in the operation and operation, which seriously affects the operation, and the bone is usually not healed or malformed after the operation due to the rod slip and rod slip caused by unreliable locking in the operation. Especially for the bone with a large fixing surface or when the fixing strength needs to be enhanced, the prior fixing device can not be expanded, so that the fixing strength of the bone is enhanced. Therefore, the traditional fracture fixation device has the defects of inconvenient selection and use, inflexible use, high manufacturing cost and poor clinical treatment effect, and needs to be further improved.
Disclosure of Invention
The invention aims to provide a double-rod fixing block which is simple in design structure, convenient to assemble, flexible to use, obvious in clinical effect and strong in expansibility.
In order to achieve the above object, the present invention provides a double-rod fixing block, comprising:
an upper rim portion including an upper fixing screw hole;
the upper edge part comprises a lower fixed screw hole which is arranged opposite to the upper fixed screw hole, and the hole wall of the lower fixed screw hole is provided with a thread;
a first connecting rod through hole positioned at one side of the connection part of the upper edge part and the lower edge part;
a second connecting rod through hole positioned at the other side of the connecting portion of the upper edge part and the lower edge part;
the first side opening is formed in the side of the through hole of the first connecting rod of the upper fixing screw hole and the lower fixing screw hole;
the second side opening is formed in the through hole side of the second connecting rod of the upper fixing screw hole and the lower fixing screw hole;
when a first connecting rod penetrates through the first connecting rod through hole, a second connecting rod penetrates through the second connecting rod through hole, and a locking screw penetrates through the upper fixing screw hole and the lower fixing screw hole, the upper screwing part of the locking screw is in screwed connection with the thread of the lower fixing screwing hole, and the screw cap of the locking screw abuts against the upper fixing screwing hole, so that the upper edge part and the lower edge part are extruded, the first connecting rod is tightly fixed in the first connecting rod through hole, and the second connecting rod is tightly fixed in the second connecting rod through hole; and the screw cap penetrates through the first side opening to be fixedly connected with the first connecting rod in an extruding mode, and the screw cap penetrates through the second side opening to be fixedly connected with the second connecting rod in an extruding mode.
Preferably, the upper fixing screw hole is one or more than one, and the corresponding lower fixing screw hole is one or more than one.
Preferably, the surface of the upper fixing threaded hole is a smooth curved surface, and is used for abutting against a screw cap of the locking screw;
and the surface of the lower fixed screw hole is specifically provided with a fastening thread for screwing with the upper screw part of the locking screw.
Preferably, the diameter of the first connecting rod is equal to or different from the diameter of the second connecting rod.
Preferably, the aperture of the upper fixed screwed hole of the double-rod fixed block is larger than that of the connecting rod through hole, and the aperture of the connecting rod through hole is larger than that of the lower fixed screwed hole.
Preferably, the radius of curvature of the arc-shaped surface of the lower surface of the double-rod fixing block ranges from 8 mm to 12 mm.
Preferably, the double-rod fixing block further comprises: a first cross hole and a second cross hole;
the first cross hole is located at the intersection of the first connecting rod through hole and the fixed threaded hole, the second cross hole is located at the intersection of the second connecting rod through hole and the fixed threaded hole, and the first cross hole and the second cross hole are symmetrically arranged on two sides of the fixed threaded hole and used for extruding and fixing the first connecting rod and the second connecting rod.
The double-rod fixing block provided by the embodiment of the invention is provided with one or more than one upper fixing screw hole, one lower fixing screw hole and two connecting rod through holes, can be more firmly fixed with a fixing device through the matching of the two connecting rods, improves the firmness of fixedly connecting with bones, is more uniform in stress, and achieves the purposes of difficulty in loosening, relieving stress concentration and stress shielding and improving the bending resistance.
Drawings
FIG. 1 is a top view of a dual rod fixture block according to an embodiment of the present invention;
FIG. 2 is a side view of a dual rod fixture block according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of portion A-A of FIG. 1;
FIG. 4 is a schematic view of a dual rod anchor block in combination with a locking screw and a connecting rod according to an embodiment of the present invention;
fig. 5 is a schematic view of another dual rod fixation block in combination with a locking screw and a connecting rod according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
The embodiment of the invention provides a double-rod fixing block 3, and the double-rod fixing block 3 is applied to bone fixation in a bone surgery.
Fig. 1 is a top view of a dual rod fixing block provided in an embodiment of the present invention, and fig. 2 is a side view of the dual rod fixing block provided in the embodiment of the present invention; referring to fig. 1 and 2, a double-rod fixing block 3 according to an embodiment of the present invention is a semi-closed elastic structure, and the double-rod fixing block 3 specifically includes: an upper edge portion 31 and a lower edge portion 32.
The double-rod fixing block 3 is a totally-enclosed structure, and the upper edge part 31 and the lower edge part 32 are connected into an integrally-formed structure.
The upper edge part 31 is positioned at the upper part of the double-rod fixing block 3, the surface of the upper edge part 31 is a smooth horizontal plane, the upper edge part 31 comprises an upper fixing threaded hole 310, the hole wall of the upper fixing threaded hole 310 is a smooth curved surface and is used for being attached to a screw cap part of a locking screw, the screw cap part of the locking screw is completely accommodated in the upper fixing threaded hole 310, and the screw cap surface of the locking screw is enabled to be flush with the surface of the upper edge part 31.
The lower edge portion 32 is located at the lower portion of the double-rod fixing block 3, and is an arc surface with a certain radian on one side of the lower edge portion 32 attached to the bone surface of the bone, the lower edge portion 32 includes a lower fixing screw hole 320, the lower fixing screw hole 320 is opposite to the upper fixing screw hole 310, and a fastening thread is arranged on the hole wall of the lower fixing screw hole 320 and is used for being screwed with the upper screw part of the locking screw, so that the upper screw part of the locking screw is locked and connected with the lower fixing screw hole 320.
Specifically, the hole diameter of the upper fixing screw hole 310 is larger than the hole diameter of the lower fixing screw hole 320, so that the screw cap portion of the locking screw can be clamped on the upper edge portion 31, and the connection between the fixing block and the bone is firmer.
A first connecting rod through hole 33 located at one side of the connection of the upper edge portion 31 and the lower edge portion 32; a second connecting rod through hole 34 at the other side of the connection of the upper edge part 31 and the lower edge part 32; the first connecting rod through hole 33 and the second connecting rod through hole 34 are symmetrically disposed at two sides of the through hole formed by the lower fixing screw hole 320 and the upper fixing screw hole 310, and are perpendicular to the insertion direction of the through hole.
Preferably, in the embodiment of the present invention, the diameter of the first connecting rod is equal to or different from the diameter of the second connecting rod, so that the diameters of the first connecting rod through hole 33 and the second connecting rod through hole 34 are equal to or different from each other.
A first side opening 35 opened at the first connecting rod through hole 33 side of the upper fixing screw hole 310 and the lower fixing screw hole 320; and a second side opening 36 opened at the second connecting rod through hole 34 side of the upper fixing screw hole 310 and the lower fixing screw hole 310.
The first side opening 35 and the second side opening 36 are communicated, so that a through groove 37 is formed in the double-rod fixing block 3, the opening square of the through groove 37 is consistent with the inserting square of the connecting rod through hole, and the through groove 37 is respectively communicated with the first connecting rod through hole 33 and the second connecting rod through hole 34; the upper edge part 31 and the lower edge part 32 are separated from the inside of the double-rod fixing block 3 through the through groove 37, and the through groove 37 adjusts the gap between the upper edge part 31 and the lower edge part 32 through the locking screw, so that the connecting rod is extruded by two sides of the through hole, and the accurate positioning of the attaching position and the direction of the double-rod fixing block 3 to the connecting rod 2 is further realized.
In one embodiment, after the locking screw is inserted through the upper fixing screw hole 310 of the upper edge portion 31 and the lower fixing screw hole 320 of the lower edge portion 32, the upper screw portion of the locking screw is screwed with the lower fixing screw hole 320, as the upper screw portion is screwed with the fastening screw and engaged, the screw cap portion of the locking screw is attached to the upper fixing screw hole 310, as the screw cap portion is completely attached to and received in the upper fixing screw hole 310, the gap of the through groove 37 is further compressed, and the screw portion and the head portion of the locking screw are inserted into the bone after passing through the lower fixing screw hole 320, respectively.
And a cross hole 38, which is formed in the upper fixing screw hole 310 by the intersection of the first and second connecting rod through holes 33 and 34 with the upper fixing screw hole 310, for pressing and fixing the connecting rod by the locking screw.
In a specific embodiment, when the first connecting rod 21 is inserted into the first connecting rod through hole 33, the second connecting rod 22 is inserted into the second connecting rod through hole 34, and the locking screw is inserted from the upper fixing screw hole 310 and the lower fixing screw hole 320, the upper screwing part of the locking screw is screwed with the thread of the lower fixing screw hole 320, and the screw cap of the locking screw abuts against the upper fixing screw hole 310, thereby pressing the upper edge part 31 and the lower edge part 32, so that the first connecting rod 21 is tightly fixed in the first connecting rod through hole 33, and the second connecting rod 22 is tightly fixed in the second connecting rod through hole 34; and the screw cap extrudes and fixedly connects the first connecting rod and the second connecting rod through a through groove 37 formed by communicating the first side opening 35 and the second side opening 36.
Fig. 3 is a sectional view of a portion a-a in fig. 1, and as shown in fig. 1 and fig. 3, one side of the lower edge portion 32, which is attached to the bone surface, is an arc surface with a certain radian, and the radius of curvature of the arc surface ranges from 8 mm to 12mm, so that the double-rod fixing block 3 is more tightly attached to the bone surface, and the connection to the fracture part is firmer.
Fig. 4 is a schematic view of the dual rod fixing block provided by the embodiment of the present invention in combination with a locking screw and a connecting rod, and a process of using the dual rod fixing block 3 in combination with the locking screw 1 and the connecting rod 2 is described with reference to fig. 1 and 4.
Example 1
In the orthopedic operation process, two connecting rods 2 are respectively inserted into a first connecting rod through hole 33 and a second connecting rod through hole 34 from one side, specifically, the two connecting rods are inserted from one side of the connecting rod through hole and extend from the other side, after a locking screw 1 penetrates through an upper fixing screw hole 310 of an upper edge part 31 and a lower fixing screw hole 320 of a lower edge part 32, an upper screw part of the locking screw 1 is in screw connection with a thread of the lower fixing screw hole 320, a screw cap part of the locking screw 1 is attached to the upper fixing screw hole 310 along with the screw connection and the fastening thread of the locking screw 1, a gap of a through groove 37 is further compressed by the screw cap until the gap is not changed any more, so that the locking screw 1 presses the upper edge part 31 and the lower edge part 32, and simultaneously the screw cap of the locking screw 1 presses the connecting rods 2 through a cross hole 38, so that the connecting rod 2 is tightly fixed in the first connecting rod through hole 33 and the second connecting rod through hole 34, and then the screw rod part and the nail head part of the locking screw 1 respectively pass through the lower fixing screw hole 320 and are implanted into the bone, so that the double-rod fixing block 3, the locking screw 1 and the connecting rod 2 are completely fixed together.
Fig. 5 is a schematic view of another dual rod fixing block according to an embodiment of the present invention, which is used in combination with a locking screw and a connecting rod, and as shown in the drawing, embodiment 2 differs from embodiment 1 in that the number of upper fixing screw holes and lower fixing screw holes of the dual rod fixing block 3' is two (i.e., dual rod dual holes), which are an upper fixing screw hole 310 and an upper fixing screw hole 311, and a lower fixing screw hole 320 and a lower fixing screw hole 321, respectively.
Fig. 5 is a schematic view of another dual rod fixing block provided in an embodiment of the present invention, and a process of using the dual rod fixing block 3' in combination with a locking screw 1 and a connecting rod 2 is described with reference to fig. 1 and 5.
Example 2
In the same orthopedic operation process, two connecting rods 2 are respectively inserted into the first connecting rod through hole 33 and the second connecting rod through hole 34 from one side, specifically, inserted from one side of the connecting rod through hole and extended from the other side, after the locking screws 1 are respectively inserted through the upper fixing screw hole 310 and the upper fixing screw hole 311 of the upper edge portion 31 and the lower fixing screw hole 320 and the lower fixing screw hole 321 of the lower edge portion 32, the upper screw parts of the two locking screws 1 are respectively screwed with the screw threads in the lower fixing screw hole 320 and the lower fixing screw hole 321, as the upper screw parts of the locking screws 1 are screwed and engaged with the fastening screw threads, the nut parts of the two locking screws 1 are respectively attached to the upper fixing screw hole 310 and the upper fixing screw hole 311, as the nut parts of the two locking screws 1 are completely attached and accommodated in the upper fixing screw hole 310 and the upper fixing screw hole 311, the gap of the through groove 37 is further compressed by the screw cap until the gap is not changed any more, whereby the two locking screws 1 press the upper edge part 31 and the lower edge part 32, and simultaneously the screw caps of the locking screws 1 press the connecting rod 2 together through the cross holes 38, so that the connecting rod 2 is tightly fixed in the connecting rod through hole 34, and then the screw part and the nail head part of the locking screws 1 are implanted into the bone after passing through the lower fixing screw hole 320, respectively, so that the double-rod fixing block 3 is completely fixed together with the two locking screws 1 and the connecting rod 2.
The double-rod fixing block provided by the embodiment of the invention is provided with one or more than one upper fixing screw hole, one lower fixing screw hole and two connecting rod through holes, can be more firmly fixed with a fixing device through the matching of the two connecting rods, improves the firmness of fixedly connecting with bones, is more uniform in stress, and achieves the purposes of difficulty in loosening, relieving stress concentration and stress shielding and improving the bending resistance.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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 (7)
1. The utility model provides a two excellent fixed blocks which characterized in that, two excellent fixed blocks include:
an upper rim portion including an upper fixing screw hole;
the upper edge part comprises a lower fixed screw hole which is arranged opposite to the upper fixed screw hole, and the hole wall of the lower fixed screw hole is provided with a thread;
a first connecting rod through hole positioned at one side of the connection part of the upper edge part and the lower edge part;
a second connecting rod through hole positioned at the other side of the connecting portion of the upper edge part and the lower edge part;
the first side opening is formed in the side of the through hole of the first connecting rod of the upper fixing screw hole and the lower fixing screw hole;
the second side opening is formed in the through hole side of the second connecting rod of the upper fixing screw hole and the lower fixing screw hole;
when a first connecting rod penetrates through the first connecting rod through hole, a second connecting rod penetrates through the second connecting rod through hole, and a locking screw penetrates through the upper fixing screw hole and the lower fixing screw hole, the upper screwing part of the locking screw is in screwed connection with the thread of the lower fixing screwing hole, and the screw cap of the locking screw abuts against the upper fixing screwing hole, so that the upper edge part and the lower edge part are extruded, the first connecting rod is tightly fixed in the first connecting rod through hole, and the second connecting rod is tightly fixed in the second connecting rod through hole; and the screw cap penetrates through the first side opening to be fixedly connected with the first connecting rod in an extruding mode, and the screw cap penetrates through the second side opening to be fixedly connected with the second connecting rod in an extruding mode.
2. The dual-rod fixing block of claim 1, wherein the upper fixing screw holes are one or more than one, and the corresponding lower fixing screw holes are one or more than one.
3. The dual-rod fixed block according to claim 2, wherein the surface of the upper fixing screw hole is a smooth curved surface for abutting against a screw cap of the locking screw;
and the surface of the lower fixed screw hole is specifically provided with a fastening thread for screwing with the upper screw part of the locking screw.
4. The dual rod anchor block of claim 1, wherein the diameter of the first connecting rod is equal to or different from the diameter of the second connecting rod.
5. The dual rod fixed block of claim 1, wherein the upper fixing screw hole of the dual rod fixed block has a larger diameter than the connecting rod through hole, and the connecting rod through hole has a larger diameter than the lower fixing screw hole.
6. The double-rod fixed block according to claim 1, wherein the radius of curvature of the arc-shaped surface of the lower surface of the double-rod fixed block ranges from 8 mm to 12 mm.
7. The dual bar fixture block of claim 1, further comprising: a first cross hole and a second cross hole;
the first cross hole is located at the intersection of the first connecting rod through hole and the fixed threaded hole, the second cross hole is located at the intersection of the second connecting rod through hole and the fixed threaded hole, and the first cross hole and the second cross hole are symmetrically arranged on two sides of the fixed threaded hole and used for extruding and fixing the first connecting rod and the second connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911367865.0A CN111035443A (en) | 2019-12-26 | 2019-12-26 | Double-rod fixing block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911367865.0A CN111035443A (en) | 2019-12-26 | 2019-12-26 | Double-rod fixing block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111035443A true CN111035443A (en) | 2020-04-21 |
Family
ID=70240607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911367865.0A Pending CN111035443A (en) | 2019-12-26 | 2019-12-26 | Double-rod fixing block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111035443A (en) |
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2019
- 2019-12-26 CN CN201911367865.0A patent/CN111035443A/en active Pending
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