CN213047093U - U-shaped nail fixing system for fixing tendon and ligament bone surface - Google Patents
U-shaped nail fixing system for fixing tendon and ligament bone surface Download PDFInfo
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- CN213047093U CN213047093U CN202020851596.7U CN202020851596U CN213047093U CN 213047093 U CN213047093 U CN 213047093U CN 202020851596 U CN202020851596 U CN 202020851596U CN 213047093 U CN213047093 U CN 213047093U
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Abstract
The utility model provides a U type nail fixing system for tendon and ligament bone face are fixed, fixing system includes U type nail, U type nail includes cross pressing plate and screw, cross pressing plate both ends symmetry is provided with the mounting hole, the mounting hole inner wall is smooth cambered surface, the center pin of mounting hole is alpha with the contained angle of vertical direction, alpha is 0-30, the screw is provided with two, the upper surface of ligament is arranged in to cross pressing plate pressure, the lower surface of ligament is located the bone face, the ligament is located between two screws, the screw includes that screwhead and an organic whole set up in the screw body of screwhead lower part, the screwhead is fixed the top outside or inside of mounting hole, the screw body passes the mounting hole screw thread and screws up in bone cortex. The utility model discloses cross press plate and screw set up to components of a whole that can function independently structure, can dismantle, during the use, the mounting hole that the screw can directly pass on the cross press plate is twisted into the bone face, and operation process is gentle, has avoided unnecessary violence damage, and can the repetitive operation location when putting the nail position unsatisfactory.
Description
Technical Field
The utility model relates to a U type nail fixing system that is used for tendon and ligament bone face to fix belongs to medical instrument technical field.
Background
The U-shaped nail is also called as a door-shaped nail, and is mainly used for bone surface fixation for reconstructing ligament graft after ligament injury in the department of sports medicine and orthopaedics.
At present, tendon and ligament are fixed to be used U type nail in clinical includes crossbeam and two nails, and the nail outside is provided with the barb, and two nails are 90 integrative settings with the both ends of crossbeam respectively. When in use, the U-shaped nail needs to be directly hammered into the bone cortex by an operation hammer, and the operation violence intensity is high. If the operation is improper, the joint of the cross beam and the vertical nail is broken sometimes in clinic, the fracture is caused by accidental injury of an operation hammer, and the cortical bone fracture around the nail path is caused by uneven stress in the process of hammering the nail; in addition, when the nail placing position is not ideal, the U-shaped nail is difficult to pull out for repositioning and fixing due to the barb anti-pulling-out structure on the nail body.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome prior art drawback, provide a U type nail fixing system for tendon and ligament bone face are fixed, horizontal clamp plate and screw set up to components of a whole that can function independently structure, can dismantle, during the use, the mounting hole that the screw directly passed on the horizontal clamp plate is twisted into the cortex lycii, and the operation process is gentle, has avoided unnecessary violent damage, and can the repetitive operation location when putting the nail position unsatisfactory.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides a U type nail fixing system for tendon and ligament bone face are fixed, fixing system includes U type nail, U type nail includes cross slab and screw, cross slab both ends symmetry is provided with the mounting hole, the mounting hole inner wall is smooth cambered surface, the center pin of mounting hole is alpha with the contained angle of vertical direction, and alpha is 0-30, the screw is provided with two, the upper surface of ligament is arranged in to the cross slab pressure, the lower surface of ligament is located the bone face, the ligament is located between two screws, the screw include screwhead and an organic whole set up in the screw body of screwhead lower part, the screwhead is fixed the top of mounting hole is outside or inside, the screw body passes the mounting hole screw thread is screwed up in the cortex lycii.
According to the U-shaped nail fixing system for fixing the tendon and the ligament bone surface, the lower end face of the transverse pressing plate is provided with the plurality of conical ratchets, and the ratchets are embedded in the ligament in a pressing mode.
Above-mentioned U type nail fixing system that is used for tendon and ligament bone face to fix, the screwhead is fixed inside the mounting hole, the mounting hole with the shape and the size of screwhead are the same, the upper portion diameter of mounting hole is greater than the lower part diameter, the smooth outer wall of screwhead with the inner wall of mounting hole closely laminates fixedly, the diameter of screwhead is greater than the diameter of screw body.
The aforesaid is used for tendon and fixed U type nail fixing system of ligament bone face, the diameter of screwhead is greater than the diameter of mounting hole, the screwhead compresses tightly to be fixed the upper end outside of mounting hole, the smooth face end of screw body upper end with the smooth inner wall of mounting hole closely laminates.
Above-mentioned a staple fixing system for tendon and ligament bone face are fixed, the lower terminal surface middle part of cross press plate sets up to the arc surface.
Above-mentioned U type nail fixing system for tendon and ligament bone face are fixed, the cross press board is long 8-12mm, and thickness is 2 mm.
According to the U-shaped nail fixing system for fixing the tendon and the ligament bone surface, the transverse pressing plate and the screws are made of titanium alloy materials.
The utility model has the advantages that:
the utility model adopts the split arrangement of the screw and the transverse pressing plate, one end of the screw is tightly attached and fixed in the mounting hole of the transverse pressing plate, when in installation and use, the transverse pressing plate is pressed and fixed on the surface of ligament, the screw passes through the mounting hole and is screwed into the bone surface along the nail path, the operation is soft, the adoption of an operation hammer to directly smash the U-shaped nail into the bone cortex with violence is avoided, the bone surface is effectively prevented from being fractured, and the fracture caused by uneven stress of the transverse pressing plate is avoided; under the condition of poor nail placement position, the screw can be directly screwed out and screwed into cortical bone again for fixation, so that the screw is safer and more labor-saving; and after the later-stage patient recovers, the patient can be easily detached through a small incision operation according to the actual condition; the lower end face of the transverse pressing plate is provided with an arc surface, so that the stressed contact area of the transverse pressing plate and the ligament is increased, the arc surface is provided with the ratchet, and the ratchet is embedded into the ligament, so that the friction force between the transverse pressing plate and the ligament is increased, and the U-shaped nail is fixed more stably; two mounting holes are symmetrically and obliquely arranged, and form a similar triangular shape with the transverse pressing plate, so that the fixing is more stable.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
FIG. 1 is a schematic view of the structure of a U-shaped nail of the present invention;
FIG. 2 is a schematic view of a disassembled structure for installation and use;
FIG. 3 is a schematic top view of the cross press plate;
FIG. 4 is a schematic view of a T-shaped screw head;
FIG. 5 is a schematic view of the cylindrical screw head mounted inside the mounting hole;
FIG. 6 is a schematic structural view of a cylindrical screw head obliquely fixed outside the mounting hole;
fig. 7 is a schematic structural view of a cylindrical screw head vertically fixed outside the mounting hole.
In the figure: 1. a transverse pressing plate; 1-1, mounting holes; 1-2, ratchets; 2. a screw; 2-1, screw heads; 2-2, a screw body; 3. a ligament; 4. bone surface; 5. a nail path guide plate; 6. a kirschner wire.
Detailed Description
The present invention will be further described with reference to the following examples.
The utility model discloses U type nail fixing system can be used to anterior cruciate ligament and rebuild the shin end and the fixed and side collateral ligament shin end and the thighbone end fixed surface of thighbone.
Referring to fig. 1 to 3, the staple fixing system for fixing tendon and ligament bone surface comprises a staple, the staple comprises a cross press plate 1 and screws 2, two ends of the cross press plate 1 are symmetrically provided with mounting holes 1-1, the included angle between the central axis of the mounting holes 1-1 and the vertical direction is alpha, alpha is 0-30 degrees, the cross press plate 1 is pressed on the upper surface of the ligament 3, two screws 2 are provided, the ligament is positioned between the two screws and positioned on the bone surface 4, the inner wall of the mounting hole is a smooth arc surface, the screw head 2-1 of the screw 2 and the screw body 2-2 are integrally arranged, the screw head 2-1 is fixed inside or outside the top end of the mounting hole 1-1, the screw body 2-2 is screwed in the bone cortex through the mounting hole 1-1, two screws fasten the transverse pressing plate to the ligament surface. The lower end face of the transverse pressing plate between the two screws is an arc surface, the arc surface is in compression contact with the ligament, and the arrangement of the arc surface increases the stress contact area of the transverse pressing plate and the ligament, so that the transverse pressing plate is in closer contact with the ligament, and the fixation is more stable; the circular arc surface of the transverse pressing plate is also provided with a plurality of conical ratchets 1-2, and the ratchets are pressed and embedded into the ligament during installation, so that the friction force between the transverse pressing plate and the ligament is increased, and the transverse pressing plate and the ligament tissue are relatively stable. Different crowds ' cortex lycii thickness slightly differs, for example, adult bone cortex thickness is thicker than children's cortex lycii thickness, male sex's cortex lycii is thicker than female, horizontal clamp plate length in the treatment, screw length and mounting hole inclination need the phase-match use, the horizontal length of horizontal clamp plate sets up to 8-12mm usually, thickness is 2mm, the diameter of screw body is 3mm, length is 8-17mm, the mounting hole inclination on the different horizontal clamp plates sets up to the difference, length and the length of screw according to horizontal clamp plate, the horizontal clamp plate that the selection was provided with different inclination mounting holes, a tip noncorrection of two screws is used for guaranteeing, and fixed more firm. The installation of screw has certain angle, forms the similar triangle-shaped between two screws and the horizontal clamp plate for whole staple is fixed more firmly.
Referring to fig. 1, 4 and 5, the screw head 2-1 is fixedly installed inside the installation hole 1-1, the shape of the screw head is the same as that of the installation hole 1-1, and the size of the screw head is the same, for example, the screw head is set to be a T-like shape with the diameter of the upper end circle larger than that of the lower end circle or the screw head is a regular cylinder and has a positive T-shape with the diameter larger than that of the screw body, similarly, the shape of the installation hole is correspondingly the same as that of the screw head, the smooth outer wall of the screw head is tightly attached and fixed with the inner wall of the installation hole, the diameter of the upper part of the installation hole is larger than that of the lower part, and the screw head is. The screw body passes through the mounting hole and screws up in the cortex of bone, and the screw head is fixed screw and transverse compression board.
Referring to fig. 6 and 7, the screw head is tightly fixed outside the top end of the mounting hole 1-1, for example, the screw head is provided as a cylindrical screw, the planes of the two ends of the transverse pressing plate are parallel to the upper plane of the screw head, the cylindrical screw head is tightly pressed on the plane of the top end of the mounting hole, the smooth surface end of the upper end of the screw body 2-2 is tightly attached and fixed with the mounting hole, and the lower end is screwed in the cortical bone.
The installation and use process is as follows: when the ligament is rebuilt and the bone surface is fixed, firstly, the transverse pressing plate is firmly pressed on the surface of the ligament, the ratchet is pressed and embedded into the ligament, the nail path guide plate 5 is placed into the mounting holes in two sides of the transverse pressing plate, then the Kirschner wire 6 is utilized to penetrate through the nail path guide plate 5, the nail path is obliquely or vertically drilled, the nail path guide plate and the Kirschner wire are used in a matched mode, deviation caused by drilling of the nail path is prevented, after drilling of the nail path is completed, the Kirschner wire is taken out, the nail path guide plate is taken down, two screws respectively penetrate through the mounting holes in two ends of the transverse pressing plate and are screwed into cortical bone along the nail path, and fixing of the.
Claims (7)
1. A staple fastening system for tendon and ligament facet fixation, comprising: the fixing system comprises a U-shaped nail, the U-shaped nail comprises a transverse pressing plate (1) and screws (2), mounting holes (1-1) are symmetrically formed in two ends of the transverse pressing plate (1), the inner wall of each mounting hole is a smooth arc surface, the included angle between the central axis of each mounting hole (1-1) and the vertical direction is alpha, alpha is 0-30 degrees, the screws (2) are two, the transverse pressing plate (1) is pressed on the upper surface of a ligament (3), the lower surface of the ligament is located on a bone surface (4), the ligament (3) is located between the two screws, each screw comprises a screw head (2-1) and a screw body (2-2) integrally arranged on the lower portion of the screw head, the screw head (2-1) is fixed on the outer portion or the inner portion of the top end of each mounting hole (1-1), and the screw body (2-2) penetrates through the bone cortex lycii radicis screwed in the mounting holes (1-1) in the bone .
2. A staple fixation system for tendon and ligamentous facet fixation as claimed in claim 1 wherein: the lower end face of the transverse pressing plate (1) is provided with a plurality of conical ratchets (1-2), and the ratchets (1-2) are embedded in the ligament (3) in a pressing mode.
3. A staple fixation system for tendon and ligamentous facet fixation as claimed in claim 2 wherein: the screw head (2-1) is fixedly arranged inside the mounting hole (1-1), the shape and the size of the mounting hole (1-1) are the same as those of the screw head (2-1), the diameter of the upper part of the mounting hole (1-1) is larger than that of the lower part of the mounting hole, the smooth outer wall of the screw head (2-1) is tightly attached and fixed with the inner wall of the mounting hole (1-1), and the diameter of the screw head (2-1) is larger than that of the screw body (2-2).
4. A staple fixation system for tendon and ligamentous facet fixation as claimed in claim 2 wherein: the diameter of the screw head (2-1) is larger than that of the mounting hole (1-1), the screw head (2-1) is tightly pressed and fixed outside the upper end of the mounting hole (1-1), and the smooth surface end of the upper end of the screw body (2-2) is tightly attached to the smooth inner wall of the mounting hole (1-1).
5. A staple fixation system for tendinous and ligamentous facet fixation according to claim 3 or 4, wherein: the middle part of the lower end surface of the transverse pressing plate (1) is provided with an arc surface.
6. A staple fixation system for tendon and ligamentous facet fixation as claimed in claim 5 wherein: the length of the transverse pressing plate (1) is 8-12mm, and the thickness of the transverse pressing plate is 2 mm.
7. A staple fixation system for tendon and ligamentous facet fixation as claimed in claim 6 wherein: the transverse pressing plate (1) and the screws (2) are both made of titanium alloy materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020851596.7U CN213047093U (en) | 2020-05-20 | 2020-05-20 | U-shaped nail fixing system for fixing tendon and ligament bone surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020851596.7U CN213047093U (en) | 2020-05-20 | 2020-05-20 | U-shaped nail fixing system for fixing tendon and ligament bone surface |
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| CN213047093U true CN213047093U (en) | 2021-04-27 |
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| CN202020851596.7U Active CN213047093U (en) | 2020-05-20 | 2020-05-20 | U-shaped nail fixing system for fixing tendon and ligament bone surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117860325A (en) * | 2024-03-11 | 2024-04-12 | 北京大学第三医院（北京大学第三临床医学院） | Ankle joint outside collateral ligament repair and reconstruction operation fixing system |
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2020
- 2020-05-20 CN CN202020851596.7U patent/CN213047093U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117860325A (en) * | 2024-03-11 | 2024-04-12 | 北京大学第三医院（北京大学第三临床医学院） | Ankle joint outside collateral ligament repair and reconstruction operation fixing system |
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