CN209770518U - External fixing device of mandible - Google Patents
External fixing device of mandible Download PDFInfo
- Publication number
- CN209770518U CN209770518U CN201920119771.0U CN201920119771U CN209770518U CN 209770518 U CN209770518 U CN 209770518U CN 201920119771 U CN201920119771 U CN 201920119771U CN 209770518 U CN209770518 U CN 209770518U
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- CN
- China
- Prior art keywords
- mandible
- fixing
- fixation
- spicule
- plate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 210000004373 mandible Anatomy 0.000 title claims abstract description 51
- 238000010079 rubber tapping Methods 0.000 claims abstract description 14
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 210000000988 bone and bone Anatomy 0.000 abstract description 28
- 230000006378 damage Effects 0.000 abstract description 5
- 238000000338 in vitro Methods 0.000 abstract description 2
- 208000010392 Bone Fractures Diseases 0.000 description 18
- 206010017076 Fracture Diseases 0.000 description 18
- 208000014674 injury Diseases 0.000 description 5
- 208000027418 Wounds and injury Diseases 0.000 description 4
- 208000006670 Multiple fractures Diseases 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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- Surgical Instruments (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
the utility model relates to a mandible in-vitro fixing device, which comprises a plurality of spicules and a fixing plate; the front end of the spicule is provided with self-tapping threads screwed into the mandible, the spicule is also provided with fixing threads, the fixing plate is provided with a plurality of spicule fixing holes, the fixing threads penetrate through the spicule fixing holes, and the fixing threads are in locking connection with two end faces of the fixing plate through nuts to keep the position of the spicule on the mandible; the shape of the fixing plate comprises a mandibular angle fixing area and a chin hole fixing area. The utility model has the advantages that: the fixing plate for mandible structural characteristics is adopted, the plurality of bone needle fixing holes can meet the fixing requirements of a plurality of fractures of the mandible, the bone needles can keep good fixing positions for the mandible by adopting the spherical washer, the tension ring grooves and the elastic drawstrings can maintain good alignment and contact states of fracture broken ends, the operating efficiency of mandible external fixation can be improved, and the mandible external fixation device is particularly suitable for treating the plurality of fractures of the mandible caused by sudden accidents or wartime injuries.
Description
Technical Field
The utility model belongs to bone fracture fixing device especially relates to an external fixing device of mandible.
Background
The fracture needs to be restored and fixed as soon as possible after the fracture occurs, the commonly used fracture fixing method is internal fixation and external fixation (or called external fixation), the internal fixation needs to be performed with an incision operation, under the condition that the fracture end of the fracture is exposed, the fixing device is tightly attached to the outer surface of the skeleton or implanted into a marrow cavity to realize the fixation, and the internal fixation can generate larger operation trauma to the human body. The external fixation does not need to be performed with an incision operation, under the condition of good restoration, the kirschner wire is drilled into the external fixation frame, the good alignment and contact state of the fracture end is maintained, and a certain external force can be borne. The mandible is shaped like a horseshoe and is relatively flat, and can bear certain stress when being chewed. However, compared with the lower limb skeleton, the lower jaw bone fracture is usually suitable for internal fixation surgery, but the lower jaw bone fractures multiple parts in serious accidents or wartime injuries, the shape of the lower jaw bone cannot be well maintained by adopting the existing internal fixation frame, and the internal fixation cannot meet the fixation of infectious multiple fracture of the lower jaw bone. In this case, the external fixing frame becomes the first choice. However, the existing external fixator cannot be well matched with the shape of the mandible, so that the fixation of the multiple fracture of the mandible is difficult to satisfy, and the operation is also very difficult.
Disclosure of Invention
The utility model aims at providing a mandible external fixation device's technical scheme, the external fixation of the mandible fracture is realized to convenient more effectively.
In order to realize the purpose, the technical scheme of the utility model is that: an external fixing device for mandible comprises a plurality of spicules and a fixing plate; the front end of spicule is equipped with the self tapping screw thread of twist in the mandible, the spicule still is equipped with fixed screw thread, a plurality of spicule fixed orificess are established to the fixed plate, fixed screw thread passes the spicule fixed orifices, fixed screw thread pass through the nut with the both ends face locking connection of fixed plate keeps the position of spicule on the mandible.
Still further, in order to be well matched with the shape of the mandible, the shape of the fixing plate includes a mandibular angle fixing region having a shape corresponding to the mandibular angle region of the mandible and a chin hole fixing region having a shape corresponding to the chin hole region of the mandible.
furthermore, in order to make the bone needle have a larger position adjustment space and prevent the fixing plate from generating radial acting force on the bone needle, the diameter of the bone needle fixing hole is larger than the outer diameter of the fixing thread of the bone needle, and a spherical washer is arranged between the nut and the end surface of the fixing plate.
Further, in order to enable the fixing plate to fix the bone pins at a plurality of positions and to reduce the mass of the fixing plate, the fixing plate is provided with 52 bone pin fixing holes having a diameter of 5 mm.
Still further, a suitable fixing plate material is that the fixing plate is an aluminum alloy plate 2.5mm thick.
Still further, another suitable fixation plate material is one in which the fixation plate is a 1.2mm thick stainless steel plate.
Further, in a preferred bone pin specification, the front end of the bone pin is provided with the self-tapping thread having a diameter of 3mm, and the bone pin is provided with the fixing thread of M4.
furthermore, in order to maintain good alignment and contact state of the fracture end, a tension ring groove is arranged between the self-tapping thread and the fixing thread of the spicule, and an elastic drawstring or a tension spring is arranged between the adjacent spicules.
The utility model has the advantages that: the fixing plate for mandible structural characteristics is adopted, the plurality of bone needle fixing holes can meet the fixing requirements of a plurality of fractures of the mandible, the bone needles can keep good fixing positions for the mandible by adopting the spherical washer, the tension ring grooves and the elastic drawstrings can maintain good alignment and contact states of fracture broken ends, the operating efficiency of mandible external fixation can be improved, and the mandible external fixation device is particularly suitable for treating the plurality of fractures of the mandible caused by sudden accidents or wartime injuries.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a plan view of the fixing plate of the present invention;
Fig. 3 is an exploded view of the present invention;
FIG. 4 is a sectional view of the structure of the present invention;
Fig. 5 is a structural sectional view showing the function of the spherical washer according to the present invention;
FIG. 6 is a schematic view of the present invention using an elastic pull belt;
FIG. 7 is a schematic view of the tension spring of the present invention;
FIG. 8 is a schematic view of the mandibular angle region and chin hole region of the mandible;
Fig. 9 is a schematic view of the present invention for fixing the fracture of the mandible.
Detailed Description
Referring to fig. 1 to 7, an external mandibular fixation device includes a plurality of spicules 10 and a fixation plate 20; the front end of spicule is equipped with the self tapping screw thread 11 of wrong income mandible, the spicule still is equipped with fixed thread 12, a plurality of spicule fixed orificess 21 are established to the fixed plate, fixed thread passes the spicule fixed orifices, fixed thread pass through nut 31 with the both ends face locking connection of fixed plate keeps the position of spicule on the mandible.
As shown in fig. 2, the shape of the fixing plate includes a mandibular angle fixing region 2a having a shape corresponding to a mandibular angle region of the mandible and a chin hole fixing region 2b having a shape corresponding to a chin hole region of the mandible.
The diameter of the bone needle fixing hole is larger than the outer diameter d of the fixing thread of the bone needle, and a spherical washer 32 is arranged between the nut and the end face of the fixing plate.
The fixed plate is provided with 52 spicule fixing holes with the diameter D of 5 mm.
the fixing plate may be an aluminum alloy plate 2.5mm thick.
The fixing plate may also be a stainless steel plate 1.2mm thick.
The front end of spicule is equipped with diameter d1 and is 3mm the self tapping screw thread, the spicule is equipped with M4 the fixed screw thread.
The spicules are equipped with pulling force annular 13 between self tapping screw thread with the fixed screw thread, adjacent be equipped with elasticity stretching strap 41 or extension spring 42 between the spicule.
The first embodiment is as follows:
Referring to fig. 1 to 7, an external lower jaw fixing device for external fixation of a fractured lower jaw bone is disclosed. The mandible a0 includes a mandibular angle region a1 and a chin hole region a2, as shown in fig. 8. The mandibular angle region and the mental foramen region are regions that are prone to multiple fractures in sudden accidents or wartime injuries.
the external mandibular fixation device of this embodiment includes a plurality of spicules 10 and a fixation plate 20.
The bone needle of the present embodiment can be regarded as a modified k-wire. The front end of the bone pin is provided with a self-tapping thread 11 screwed into the mandible, the diameter d1=3mm of the self-tapping thread. The spicule is further provided with a length of fixing thread 12, which is an M4 thread, the nominal external diameter of which is d =4 mm. The spicule is provided with a tension ring groove 13 between the self-tapping thread and the fixing thread. The tail end of the spicule is provided with a section of stupefied shaft for rotating the spicule. The self-tapping thread of the pin passes through the flesh layer a3 and is screwed onto the mandible.
The fixed plate is a metal plate. The fixing plate needs to have sufficient strength and as small a mass as possible, and in this embodiment, the fixing plate is an aluminum alloy plate 2.5mm thick.
As shown in fig. 2, the shape of the fixed plate includes a mandibular angle fixing region 2a having a shape corresponding to a mandibular angle region a1 of the mandible and a chin hole fixing region 2b having a shape corresponding to a chin hole region a2 of the mandible. The fixing plate is provided with 52 spicule fixing holes with the diameter D of 5 mm. The plurality of bone needle fixing holes are adopted, so that the fixing plate can fix bone needles at a plurality of positions, and the fracture fixation of the whole lower jaw angle area and the chin area is met. Simultaneously, a plurality of spicule fixed orifices can also reduce the quality of fixed plate, makes the fixed plate wear more easily, keeps the position at the jawbone.
the fixing thread section of the spicule penetrates through the spicule fixing hole, and the fixing thread is in locking connection with the two end faces of the fixing plate through the nut 31, so that the position of the spicule can be fixed, and the position of the spicule on the mandible is kept. In order to allow a larger space for the position adjustment of the spicules and to prevent the fixing plate from generating a radial force on the spicules, a spherical washer 32 is provided between the nut and the end face of the fixing plate. Because the diameter D of the bone needle fixing hole is larger than the outer diameter D of the fixing thread of the bone needle, the bone needle can be inclined in a certain range relative to the axis of the bone needle fixing hole (as shown in figure 5), so that the fixing plate can adapt to various positions of the bone needle, and the generation of radial force on the bone needle is avoided.
In order to maintain the fracture end in good alignment and contact state, an elastic drawstring 41 (as shown in fig. 6) is arranged between the adjacent spicules, and the elastic drawstring of the embodiment is an annular rubber band. Tension springs 42 (shown in fig. 7) may be used to tension the adjacent spicules.
The fixing plate for mandibular bone structural features is adopted in the present embodiment, which is more targeted and practical than the conventional external fixation device for fracture, as shown in fig. 9, the shape of the fixing plate and the plurality of bone pin fixing holes can fix a plurality of fractures a4 of the mandible in vitro. The adoption of the spherical washer can ensure that the bone needle keeps a good fixed position for the mandible, the tension ring groove and the elastic drawstring can maintain good alignment and contact states of the fracture broken end, can improve the operating efficiency of external fixation of the mandible, and is particularly suitable for the treatment of the mandible fracture caused by sudden accidents or wartime injuries.
example two:
An external mandible fixing device is provided, which is a structural replacement of the first embodiment.
in this example, the fixing plate is a stainless steel plate having a thickness of 1.2 mm. Because the stainless steel has better structural strength and rigidity, the fixed plate made of the stainless steel can adopt thinner thickness, and is more convenient to carry.
Claims (8)
1. An external fixing device for mandible is characterized by comprising a plurality of spicules and a fixing plate; the front end of spicule is equipped with the self tapping screw thread of twist in the mandible, the spicule still is equipped with fixed screw thread, a plurality of spicule fixed orificess are established to the fixed plate, fixed screw thread passes the spicule fixed orifices, fixed screw thread pass through the nut with the both ends face locking connection of fixed plate keeps the position of spicule on the mandible.
2. the mandibular external fixation device of claim 1, wherein the shape of the fixation plate comprises a mandibular angle fixation region and a chin hole fixation region, the mandibular angle fixation region being shaped to correspond to a mandibular angle region of the mandible, and the chin hole fixation region being shaped to correspond to a chin hole region of the mandible.
3. The mandibular external fixation device of claim 1, wherein the diameter of the pin fixation hole is larger than the outer diameter of the pin fixation thread and a spherical washer is provided between the nut and the end face of the fixation plate.
4. The mandibular external fixation device of claim 1, wherein the fixation plate is provided with 52 spicule fixation holes of 5mm diameter.
5. The mandibular external fixation device of claim 1, wherein the fixation plate is a 2.5mm thick aluminum alloy plate.
6. The mandibular external fixation device of claim 1, wherein the fixation plate is a 1.2mm thick stainless steel plate.
7. The mandibular external fixation device of claim 1, wherein the spicules are provided at their leading ends with the self-tapping threads of 3mm in diameter and the spicules are provided with the fixing threads of M4.
8. the mandibular external fixation device of claim 1, wherein the spicules are provided with tension ring grooves between the self tapping threads and the fixation threads and an elastic pull tape or spring is provided between adjacent spicules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920119771.0U CN209770518U (en) | 2019-01-24 | 2019-01-24 | External fixing device of mandible |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920119771.0U CN209770518U (en) | 2019-01-24 | 2019-01-24 | External fixing device of mandible |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209770518U true CN209770518U (en) | 2019-12-13 |
Family
ID=68793481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920119771.0U Expired - Fee Related CN209770518U (en) | 2019-01-24 | 2019-01-24 | External fixing device of mandible |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209770518U (en) |
-
2019
- 2019-01-24 CN CN201920119771.0U patent/CN209770518U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191213 Termination date: 20210124 |