CN106725810B - Internal fixation steel plate with increased fixation strength - Google Patents
Internal fixation steel plate with increased fixation strength Download PDFInfo
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- CN106725810B CN106725810B CN201710106856.0A CN201710106856A CN106725810B CN 106725810 B CN106725810 B CN 106725810B CN 201710106856 A CN201710106856 A CN 201710106856A CN 106725810 B CN106725810 B CN 106725810B
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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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8023—Variable length plates adjustable in both directions
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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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
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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
- A61B2017/564—Methods for bone or joint treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to an internal fixation steel plate with increased fixation strength, which comprises a steel plate body (1), wherein the longitudinal section of the steel plate body (1) is a part of an isosceles triangle with three corners removed. The invention improves the shape of the steel plate to form a shape body with slightly thicker middle and slightly thinner two ends, so that the steel plate becomes a triangle-like section on a longitudinal section, the stability of the triangle is better than that of a rectangle, the steel plate is not easy to bend and break under the action of external force, and the stability and the fixing strength of fracture ends are improved.
Description
Technical Field
The invention relates to the technical medical instrument field, in particular to an internal fixation steel plate with increased fixation strength.
Background
The steel plate is a surgical instrument which is very often used in orthopaedics clinically, and the fracture end is fixed through the steel plate, so that the fracture end is stable, and finally the purpose of healing is achieved. The steel plate commonly used at present is cuboid, and its longitudinal section is rectangle (as shown in fig. 1A-B), and the longer the steel plate, the longer its arm of force, the biggest the power that the steel plate mid portion bore, and it can longitudinal bending under powerful exogenic action, leads to the bone fracture end unstable, has the risk of breaking even.
Chinese patent 201310615416.X discloses a knee joint platform steel plate, the whole steel plate is Z-shaped, and is composed of a steel plate head, a plate body and a steel plate tail, the steel plate head and the steel plate tail are rotationally symmetrical with a rotation angle of 180 degrees, and a plurality of through holes are respectively arranged on the steel plate head and the steel plate tail; the thickness of the plate body is larger than that of the head part and the tail part of the steel plate; grooves are formed on two sides of the plate body; the number of the through holes is three; the edges of the head part and the tail part of the steel plate are arc-shaped; the steel plate of this technical scheme also is T type, but when using, its longitudinal section still is rectangle, can' T effectively avoid the risk that the fracture end department steel plate was buckled. Chinese patent 201210002010.X discloses a trapezoid locking steel plate with radian for treating fracture of femoral neck, comprising a trapezoid locking steel plate, wherein the upper end of the trapezoid locking steel plate is narrow, the lower end of the trapezoid locking steel plate is wide, the trapezoid surface attached to the proximal end of femur is provided with radian, the center position of the trapezoid locking steel plate is provided with a center hole, 6 locking holes are arranged on the trapezoid locking steel plate, the directions of the 6 locking holes and the center hole are parallel to each other, the center hole is taken as the center, the 6 locking holes are divergently arranged in three directions of the upper end, the left lower end and the right lower end, each direction is provided with 2 locking holes, and locking screws are arranged on the locking holes; although the thickness of the plate body (fracture end) of the steel plate is larger than that of the fixed end (head and tail), the joint of the plate body and the head and tail is thinner, and the steel plate is still easy to break under the action of external force when in use. Therefore, aiming at the defects in the prior art, the structural shape of the steel plate needs to be improved, so that the steel plate is not easy to bend and break under the action of external force, and the stability is increased.
Disclosure of Invention
Therefore, according to clinical needs, the appearance of the steel plate is improved to form a shape body with slightly thicker middle and slightly thinner two ends, so that the steel plate becomes a triangle on the longitudinal section, the stability of the triangle is better than that of a rectangle, the steel plate is unlikely to bend and break under the action of external force, and the stability is increased.
The invention aims to overcome the defects in the prior art and provide an internal fixation steel plate with increased fixation strength.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides an internal fixation steel sheet that fixed strength increases, includes steel sheet plate body (1), the longitudinal section of steel sheet plate body (1) is for removing the isosceles triangle's of three angles part, and the thickness at steel sheet plate body (1) longitudinal section middle part is greater than the thickness at its both ends, and this steel sheet is difficult for taking place deformation, increases the fixed stability and the fixed strength of fracture end.
Further, the included angle between the hypotenuse and the bottom edge of the isosceles triangle is 5-30 degrees.
Further, a plurality of evenly distributed fixing nail holes are formed in the steel plate body (1).
Further, the surface of the steel plate body (1) is provided with reinforcing ribs, and the reinforcing ribs increase the bending and breaking resistance of the steel plate and prevent the steel plate from breaking.
Further, the longitudinal section of the steel plate body (1) comprises a lower edge (18) which is fixed in contact with the fracture part and an upper edge (17) which is parallel to the lower edge (18), and the ratio of the length of the lower edge (18) to the length of the upper edge (17) is 2:1-10:1.
Further, the steel plate body (1) is strip-shaped and consists of an upper fixing section (2), a splicing section (3) and a lower fixing section (4); the surface of the steel plate body (1) is provided with raised reinforcing ribs (5), and the reinforcing ribs increase the bending and breaking resistance of the steel plate and prevent the steel plate from breaking; a plurality of fixing nail holes (6) are formed in the upper fixing section (2), an upper embedding groove (7) is formed in the lower end face of the upper fixing section (2), a first connecting hole (8) is formed in the surface of the upper fixing section (2) corresponding to the upper embedding groove (7), and the first connecting hole (8) penetrates through the upper embedding groove (7);
the splicing section (3) consists of a jogged block (9) and a connecting section (10), the jogged block (9) is matched with the upper jogged groove (7), a second connecting hole (11) is formed in the jogged block (9), the width of the connecting section (10) is the same as that of the upper fixed section (2), a jogged groove (12) is formed in the lower end face of the connecting section (10), a third connecting hole (13) is formed in the surface of the connecting section (10) corresponding to the jogged groove (12), and the third connecting hole (13) penetrates through the jogged groove (12);
the lower fixing section (4) is composed of a lower embedded block (14) and a lower fixing steel plate (15), the lower embedded block (14) is matched with the embedded groove (12), a fourth connecting hole (16) is formed in the lower embedded block (14), the width of the lower fixing steel plate (15) is the same as that of the upper fixing section (2), and a plurality of fixing nail holes (6) are formed in the surface of the lower fixing steel plate (15).
Further, the connecting holes and the fixing nail holes (6) penetrate through the reinforcing ribs (5).
Furthermore, each steel plate body (1) is provided with 2-5 inserting sections (3), and two adjacent inserting sections (3) are connected in an end-to-end mode through an inserting block (9) inserted in an inserting groove (11).
Further, the fixed nail hole (6) is provided with threads, and a screw is installed through the threads; the connecting hole is provided with threads, and a screw is installed through the threads.
Further, the reinforcing ribs are arranged in the middle of the upper surface of the steel plate body (1), and are parallel to the long axis direction of the steel plate body (1).
The invention has the advantages that:
1. the invention improves the shape of the steel plate to form a shape body with slightly thicker middle and slightly thinner two ends, so that the steel plate becomes a triangle-like section on a longitudinal section, the stability of the triangle is better than that of a rectangle, the steel plate is not easy to bend and break under the action of external force, and the stability and the fixing strength of fracture ends are improved.
2. The design of the steel plate section similar to a triangle can reduce micro-motion of a postoperative fixed steel plate, reduce the risk of steel plate fracture, and is beneficial to bone healing and postoperative recovery of patients.
3. The steel plate body consists of an upper fixing section, a splicing section and a lower fixing section; when in use, the length of the steel plate can be adjusted according to the operation requirement, so that the fracture reduction fixation operation is simplified, the operation time is shortened, and the pain of a patient is relieved.
4. The surface of the steel plate body is provided with the raised reinforcing ribs, the reinforcing ribs are arranged in the middle of the upper surface of the steel plate body and are arranged in parallel with the long axis direction of the steel plate body, the reinforcing ribs are designed to increase the bending and breaking resistance of the steel plate, the bending and breaking are prevented, and the stability is higher.
Drawings
Fig. 1 is a schematic structural view of a prior art fixed steel plate. Fig. 1A is a schematic view of a longitudinal section of a steel plate before breaking, and fig. 1B is a schematic view of a longitudinal section of a steel plate after breaking.
Fig. 2 is a schematic structural view of the internal fixation steel plate of the present invention. Wherein fig. 2A is a schematic view of a longitudinal section of a fixed steel plate, and fig. 2B is a schematic view of a use state.
Fig. 3 is a schematic diagram of an improved structure of the internal fixation steel plate of the invention.
Fig. 4 is a schematic view of the inner fixed steel plate of the present invention after being disassembled. Wherein fig. 4A is an upper fixing section, fig. 4B is a plugging section, and fig. 4C is a lower fixing section.
Fig. 5 is a top view of fig. 4A.
Fig. 6 is a top view of fig. 4B.
Fig. 7 is a top view of fig. 4C.
Detailed Description
The invention is further described below in conjunction with the detailed description. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the description of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
Reference numerals and components referred to in the drawings are as follows:
1. the steel plate body 2, the upper fixing section 3 and the inserting section
4. Lower fixing section 5, reinforcing ribs 6, fixing nail holes
7. Upper fitting groove 8, first connecting hole 9, fitting block
10. A connecting section 11, a second connecting hole 12, and a fitting groove
13. Third connecting hole 14, lower jogged block 15, lower fixed steel plate
16. Fourth connecting hole 17. Upper edge 18. Lower edge
Example 1 internal fixation Steel sheet with increased fixation Strength according to the invention
Please refer to fig. 1-2. Fig. 1 is a schematic structural view of a prior art fixed steel plate. Fig. 1A is a schematic view of a longitudinal section of a steel plate before breaking, and fig. 1B is a schematic view of a longitudinal section of a steel plate after breaking. Fig. 2 is a schematic structural view of the internal fixation steel plate of the present invention. Wherein fig. 2A is a schematic view of a longitudinal section of a fixed steel plate, and fig. 2B is a schematic view of a use state.
The utility model provides an internal fixation steel sheet that fixed strength increases, includes steel sheet plate body 1, steel sheet plate body 1's longitudinal section is the isosceles triangle's of removing three angles part, and isosceles triangle's hypotenuse is 5-30 degrees with the contained angle of base, steel sheet plate body 1's longitudinal section includes the lower limit 18 fixed with the fracture position contact, and the upper edge 17 parallel with lower limit 18, the ratio between lower limit 18 length and the upper edge 17 length is 2:1~ 10:1. The end surfaces of the left side and the right side of the steel plate are parallel. The steel plate body 1 is provided with a plurality of evenly distributed fixing nail holes, the fixing nail holes are provided with threads, and screws are installed through the threads. The surface of the steel plate body 1 is provided with a reinforcing rib, the reinforcing rib is arranged in the middle of the upper surface of the steel plate body 1 and is parallel to the long axis direction of the steel plate body 1, the reinforcing rib increases the bending and breaking resistance of the steel plate, and the steel plate is prevented from being broken. The invention improves the shape of the fixed steel plate, so that the thickness of the middle part of the longitudinal section of the steel plate is larger than the thickness of the two ends of the steel plate, deformation is not easy to occur when the steel plate is used, and the stability and the fixing strength of fracture end fixation are improved.
The steel plate commonly used in the prior art is cuboid, the longitudinal section of the steel plate is rectangular as shown in fig. 1, the longer the steel plate is, the longer the moment arm of the steel plate is, the larger the force born by the middle part of the steel plate is, the steel plate can be longitudinally bent under the action of strong external force, and the broken end of the bone is unstable and even has the risk of breaking.
According to clinical needs, the shape of the steel plate is improved to form a shape body with slightly thicker middle and slightly thinner two ends, so that the steel plate is formed into a triangle on the longitudinal section, the stability of the triangle is better than that of a rectangle, the steel plate is unlikely to bend and break under the action of external force, and the stability of fracture end fixation is improved.
Example 2 improved Structure of the present invention
Please refer to fig. 3-7. Fig. 3 is a schematic view of an improved structure of the internal fixation steel plate of the present invention, fig. 4 is a schematic view of the internal fixation steel plate of the present invention after being disassembled, wherein fig. 4A is an upper fixation section, fig. 4B is a plugging section, fig. 4C is a lower fixation section, fig. 5 is a top view of fig. 4A, fig. 6 is a top view of fig. 4B, and fig. 7 is a top view of fig. 4C.
The utility model provides an internal fixation steel sheet that fixed strength increases, includes steel sheet plate body 1, steel sheet plate body 1's longitudinal section is the isosceles triangle's of removing three angles part, and isosceles triangle's hypotenuse is 5-30 degrees with the contained angle of base, steel sheet plate body 1 longitudinal section includes the fixed lower limit 18 of fracture position contact, and the upper edge 17 parallel with lower limit 18, the ratio between lower limit 18 length and the upper edge 17 length is 2:1~ 10:1. The steel plate body 1 is provided with a plurality of evenly distributed fixing nail holes, the fixing nail holes are provided with threads, and screws are installed through the threads. The surface of the steel plate body 1 is provided with raised reinforcing ribs 5, the reinforcing ribs 5 are arranged in the middle of the upper surface of the steel plate body 1 and are parallel to the long axis direction of the steel plate body 1, and the reinforcing ribs increase the bending and breaking resistance of the steel plate and prevent the steel plate from breaking. The steel plate body 1 is in a bent strip shape and consists of an upper fixing section 2, a plugging section 3 and a lower fixing section 4; the upper fixing section 2 is provided with a plurality of fixing nail holes 6, the lower end face of the upper fixing section 2 is provided with an upper embedded groove 7, the surface of the upper fixing section 2 corresponding to the upper embedded groove 7 is provided with a first connecting hole 8, and the first connecting hole 8 penetrates through the upper embedded groove 7. The splicing section 3 consists of a jogged block 9 and a connecting section 10, the jogged block 9 is matched with the upper jogged groove 7, a second connecting hole 11 is formed in the jogged block 9, the width of the connecting section 10 is the same as that of the upper fixed section 2, a jogged groove 12 is formed in the lower end face of the connecting section 10, a third connecting hole 13 is formed in the surface of the connecting section 10 corresponding to the jogged groove 12, and the third connecting hole 13 penetrates through the jogged groove 12. The lower fixing section 4 is composed of a lower embedded block 14 and a lower fixing steel plate 15, the lower embedded block 14 is matched with the embedded groove 12, a fourth connecting hole 16 is formed in the lower embedded block 14, the width of the lower fixing steel plate 15 is the same as that of the upper fixing section 2, and a plurality of fixing nail holes 6 are formed in the surface of the lower fixing steel plate 15. Each steel plate body 1 is provided with 2-5 inserting sections 3, and two adjacent inserting sections 3 are connected end to end through an inserting block 9 inserted in an inserting groove 12; the first connecting hole 8, the second connecting hole 11, the third connecting hole 13 and the fixing nail hole 6 penetrate through the reinforcing rib 5, the fixing nail hole 6 is provided with threads, and the connecting holes are provided with threads to install screws through the threads. The steel plate body 1 is in a bent strip shape, and the bent strip shape can prevent the steel plate from being bent in the long axis direction, so that the fixation of the fracture part can be better realized, and the healing of the fracture part is facilitated. The arrangement of the inserting section 3 ensures that the length of the steel plate can be adjusted according to the operation requirement, simplifies the fracture reduction fixation operation, shortens the operation time and relieves the pain of patients.
The application method of the embodiment comprises the following steps: when in use, firstly, the length of a required fixed steel plate is measured according to the size and the position of the fracture of a patient, a proper number of inserting sections are selected to be assembled with an upper fixed section and a lower fixed section, and firstly, bone nails penetrate through the fixed nail holes 6 to fixedly connect the upper fixed section 2 with the upper end of the fracture position; inserting the embedded block 9 of the inserting section 3 into the upper embedded groove 7, aligning the second connecting hole 11 with the first connecting hole 8, penetrating the second connecting hole 11 with the first connecting hole 8 by using bone nails, fixedly connecting the inserting section 3 with the upper fixed section 2 and the fracture part, connecting the rest inserting section 3 with the fixed inserting section 3 in an end-to-end manner through the embedded block 9 inserted into the embedded groove 12, aligning the third connecting hole 13 with the second connecting hole 11 and fixedly connecting the third connecting hole with the bone nails; the lower embedded block 14 is inserted into the embedded groove 12 of the last inserted section 3, the third connecting hole 13 is aligned with the fourth connecting hole 16, the bone nail passes through the third connecting hole 13 and the fourth connecting hole 16, the lower fixed section 4 is fixedly connected with the inserted section 3 and the fracture part, and finally the bone nail passes through the fixing nail hole 6 on the lower fixed steel plate 15 to fix the lower fixed steel plate 15 at the lower end of the fracture part, thus completing the operation.
The beneficial effects are that:
1. the invention improves the shape of the steel plate to form a shape body with slightly thicker middle and slightly thinner two ends, so that the steel plate becomes a triangle-like section on a longitudinal section, the stability of the triangle is better than that of a rectangle, the steel plate is not easy to bend and break under the action of external force, and the stability and the fixing strength of fracture ends are improved.
2. The design of the steel plate section similar to a triangle can reduce micro-motion of a postoperative fixed steel plate, reduce the risk of steel plate fracture, and is beneficial to bone healing and postoperative recovery of patients.
3. The steel plate body consists of an upper fixing section, a splicing section and a lower fixing section; when in use, the length of the steel plate can be adjusted according to the operation requirement, so that the fracture reduction fixation operation is simplified, the operation time is shortened, and the pain of a patient is relieved.
4. The surface of the steel plate body is provided with the raised reinforcing ribs, the reinforcing ribs are arranged in the middle of the upper surface of the steel plate body and are arranged in parallel with the long axis direction of the steel plate body, the reinforcing ribs are designed to increase the bending and breaking resistance of the steel plate, the bending and breaking are prevented, and the stability is higher.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and additions may be made to those skilled in the art without departing from the method of the present invention, which modifications and additions are also to be considered as within the scope of the present invention.
Claims (7)
1. The utility model provides an internal fixation steel sheet that fixed strength increases, includes steel sheet plate body (1), its characterized in that, the longitudinal section of steel sheet plate body (1) is the isosceles triangle's of three angles of removal part, and the thickness in steel sheet plate body (1) longitudinal section middle part is greater than the thickness at its both ends, and this steel sheet is difficult for taking place deformation, increases the fixed stability of fracture end and fixed strength, the surface of steel sheet plate body (1) is equipped with the strengthening rib, the strengthening rib increases the ability of steel sheet bending resistance and rupture, prevents the steel sheet rupture, the longitudinal section of steel sheet plate body (1) includes lower limit (18) fixed with the fracture site contact, and the upper limit (17) parallel with lower limit (18), the ratio between lower limit (18) length and the upper limit (17) length is 2:1~10:1, steel sheet plate body (1) is the bar, comprises upper fixed section (2), grafting section (3), lower fixed section (4); the surface of the steel plate body (1) is provided with raised reinforcing ribs (5), and the reinforcing ribs increase the bending and breaking resistance of the steel plate and prevent the steel plate from breaking; a plurality of fixing nail holes (6) are formed in the upper fixing section (2), an upper embedding groove (7) is formed in the lower end face of the upper fixing section (2), a first connecting hole (8) is formed in the surface of the upper fixing section (2) corresponding to the upper embedding groove (7), and the first connecting hole (8) penetrates through the upper embedding groove (7);
the splicing section (3) consists of a jogged block (9) and a connecting section (10), the jogged block (9) is matched with the upper jogged groove (7), a second connecting hole (11) is formed in the jogged block (9), the width of the connecting section (10) is the same as that of the upper fixed section (2), a jogged groove (12) is formed in the lower end face of the connecting section (10), a third connecting hole (13) is formed in the surface of the connecting section (10) corresponding to the jogged groove (12), and the third connecting hole (13) penetrates through the jogged groove (12);
the lower fixing section (4) is composed of a lower embedded block (14) and a lower fixing steel plate (15), the lower embedded block (14) is matched with the embedded groove (12), a fourth connecting hole (16) is formed in the lower embedded block (14), the width of the lower fixing steel plate (15) is the same as that of the upper fixing section (2), and a plurality of fixing nail holes (6) are formed in the surface of the lower fixing steel plate (15).
2. The internal fixation steel plate with increased fixation strength according to claim 1, wherein the angle between the hypotenuse and the base of the isosceles triangle is 5-30 degrees.
3. The internal fixation steel plate with increased fixation strength according to claim 1, characterized in that the steel plate body (1) is provided with a plurality of evenly distributed fixation nail holes.
4. The internal fixation steel plate with increased fixation strength according to claim 1, characterized in that the connection holes and fixation nail holes (6) penetrate the reinforcement bars (5).
5. The internal fixation steel plate with increased fixation strength according to claim 1, wherein each steel plate body (1) is provided with 2-5 plugging sections (3), and two adjacent plugging sections (3) are connected in an end-to-end manner through a plugging block (9) plugged in a plugging groove (12).
6. The internal fixation steel plate with increased fixation strength according to claim 1, characterized in that the fixation nail holes (6) are threaded, through which screws are installed; the connecting hole is provided with threads, and a screw is installed through the threads.
7. The internal fixation steel plate with increased fixation strength according to claim 1, wherein the reinforcing ribs are provided in the middle of the upper surface of the steel plate body (1), and the reinforcing ribs are provided parallel to the long axis direction of the steel plate body (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710106856.0A CN106725810B (en) | 2017-02-27 | 2017-02-27 | Internal fixation steel plate with increased fixation strength |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710106856.0A CN106725810B (en) | 2017-02-27 | 2017-02-27 | Internal fixation steel plate with increased fixation strength |
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| CN106725810A CN106725810A (en) | 2017-05-31 |
| CN106725810B true CN106725810B (en) | 2023-06-06 |
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| CN111544104B (en) * | 2019-05-15 | 2024-04-30 | 华中科技大学同济医学院附属协和医院 | Mortise and tenon structure spliced fracture reduction pressurizing internal fixing device |
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