CN110279460B - Adjustable combined bone nail plate - Google Patents
Adjustable combined bone nail plate Download PDFInfo
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- CN110279460B CN110279460B CN201910601858.6A CN201910601858A CN110279460B CN 110279460 B CN110279460 B CN 110279460B CN 201910601858 A CN201910601858 A CN 201910601858A CN 110279460 B CN110279460 B CN 110279460B
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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
- A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
- A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
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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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
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Abstract
The invention discloses an adjustable combined bone nail plate, which is characterized in that: comprises two bone plates, two adjusting rods, two pressing plates and two first screws; two first adjusting holes are respectively arranged on the opposite surfaces of the two bone plates; the outer side walls of the two end parts of the two adjusting rods are respectively provided with an annular groove which is distributed at equal intervals; two pressure plate clamping grooves are respectively arranged on the front surfaces of the two bone plates and are communicated with the two first adjusting holes; one end parts of the two adjusting rods are respectively inserted into the two first adjusting holes of one bone plate, and the other end parts of the two adjusting rods are respectively inserted into the two first adjusting holes of the other bone plate; the inner surfaces of the two pressure plates are provided with two arc-shaped grooves; the arc-shaped groove is matched with the end part of the adjusting rod in shape, and an arc-shaped clamping table used for being inserted into the annular groove is arranged on the inner wall of the arc-shaped groove. The invention adopts a structural design different from the existing adjusting mode, and can solve the problems of looseness and poor reliability.
Description
Technical Field
The invention belongs to an adjustable combined bone nail plate.
Background
When treating orthopedic disorders such as fracture, the bone nail and the bone plate are combined and fixed at the position around the fracture part.
According to the bone type characteristics of different patients, the spacing or the angle of the bone screws on the bone plate needs to be adjusted so as to achieve the optimal working state of the bone screws and the bone plate. While the positions and the angles of the bone nail mounting holes on the bone plate on the existing market are not adjustable.
In addition, an adjustable bone plate (publication No. CN 101056590B) has been disclosed, which can achieve adjustment of the length of the bone plate. However, the following disadvantages still exist and are analyzed as follows:
firstly, because the two ends of the connecting rod are respectively inserted into the hole cavities of the two longitudinal plates, if the connecting rod is matched with the hole cavity in a threaded manner, and the connecting rod rotates to a certain extent due to the movement of a patient, the connecting rod and the threaded hole of the longitudinal plate rotate mutually to generate longitudinal displacement, the overall dimension of the bone plate changes, and the bone nails on the two longitudinal plates deviate at the same time, so that the risk of loosening is caused;
secondly, because the two ends of the connecting rod are respectively inserted into the cavities of the two longitudinal plates, if a mode that the opening of the slit is reduced by a large-top fixing screw to clamp the connecting rod by the cavity is adopted, the connecting rod is contacted with the smooth surface of the cavity and generates a clamping force action by reducing the opening of the slit, the friction force between the connecting rod and the cavity is small, the connecting rod is easy to slide and displace in the cavity, the appearance size of the bone plate is changed, the bone nails on the two longitudinal plates are deviated at the same time, and the risk of loosening is existed;
thirdly, when the bone screws are installed in the bone screw holes on the bone plate, the directions of the bone screws cannot be adjusted, and in practical application, the angles of the bone screws on the bone plate are different.
Disclosure of Invention
To address one or more of the above-discussed deficiencies in the prior art, the present invention provides an adjustable modular bone screw plate.
In order to achieve the purpose, the invention provides an adjustable combined bone nail plate, which is characterized in that: comprises two bone plates (1), two adjusting rods (2), two pressing plates (3) and two first screws (4);
the two bone plates (1) are oppositely arranged, two first adjusting holes (1-1) are respectively arranged on the opposite surfaces of the two bone plates (1), and the two first adjusting holes (1-1) are distributed in parallel at intervals; the outer side walls of the two end parts of the two adjusting rods (2) are respectively provided with an annular groove (2-1) which is distributed at equal intervals; the front surfaces of the two bone plates (1) are respectively provided with two pressure plate clamping grooves (1-2), the pressure plate clamping grooves (1-2) are communicated with the two first adjusting holes (1-1), and the groove bottom surfaces of the two pressure plate clamping grooves (1-2) are respectively provided with two first threaded holes (1-21); the two pressing plates (3) are respectively inserted into the pressing plate clamping grooves (1-2) of the two bone plates (1), and the two pressing plates (3) are respectively provided with two through holes (3-1); the screw rod parts of the two first screws (4) respectively penetrate through the two through holes (3-1) and then are respectively in threaded fit with the two first threaded holes (1-21); the two adjusting rods (2) are distributed in parallel at intervals; one end parts of the two adjusting rods (2) are respectively inserted into two first adjusting holes (1-1) of one bone plate (1); the other ends of the two adjusting rods (2) are respectively inserted into two first adjusting holes (1-1) of the other bone plate (1); the inner surfaces of the two pressure plates (3) are provided with two arc-shaped grooves (3-2); the arc-shaped groove (3-2) is matched with the end part of the adjusting rod (2) in shape, and an arc-shaped clamping table (3-21) which is inserted into the annular groove (2-1) is arranged on the inner wall of the arc-shaped groove (3-2); the middle parts of the two adjusting rods (2) are fixed into a whole through a connecting plate (5).
By adopting the scheme, the method has the following characteristics and analysis:
firstly, the pressure plate (3) is firstly inserted into the pressure plate clamping groove (1-2) of the bone plate (1) for positioning and limiting and then is fixed in the pressure plate clamping groove (1-2) of the bone plate (1) by the first screw (4), so that after the pressure plate (3) is fixed in the pressure plate clamping groove (1-2) of the bone plate (1), the position accuracy of the pressure plate (3) is ensured, and meanwhile, the pressure plate (3) is limited in the bone plate (1) and cannot generate loose displacement;
secondly, as the end part of the adjusting rod (2) is inserted into the first adjusting hole (1-1) of the bone plate (1), the outer side wall of the end part of the adjusting rod (2) is provided with annular grooves (2-1) which are distributed at equal intervals, when the pressing plate (3) is fixed in the pressing plate clamping groove (1-2) of the bone plate (1), the arc-shaped grooves (3-2) on the inner surface of the pressing plate (3) can be contacted and matched with the outer side wall of the end part of the adjusting rod (2) to be mutually compressed, and meanwhile, the arc-shaped clamping tables (3-21) on the inner wall of the arc-shaped grooves (3-2) are inserted into the annular grooves (2-1) and clamped, the adjusting rod (2) is pressed and clamped by the arc-shaped clamping tables (3-21) to be limited to move or loosen along the axial direction, and the pressing plate (3) is fixed and limited in the pressing plate clamping groove (1-2) of, therefore, when the pressing plate (3) is positioned and fixed in the pressing plate clamping groove (1-2) of the bone plate (1), the bone plate (1) and the adjusting rod (2) are pressed and clamped by the pressing plate (3) without relative looseness or displacement;
thirdly, as the inner surface of the pressure plate (3) is provided with two arc-shaped grooves (3-2), the two arc-shaped grooves (3-2) of the pressure plate (3) are respectively used for pressing and clamping the same side end parts of the two adjusting rods (2), and the pressure plate (3) can press and clamp the end parts of the two adjusting rods (2) which are respectively inserted into the two first adjusting holes (1-1) of the bone plate (1); consequently, adopt a clamp plate (3) can realize compressing tightly the screens simultaneously to the tip of two regulation poles (2), can realize loosening simultaneously or compress tightly the regulation with the tip of two regulation poles (2) when through this first screw (4) knob, be different from current structural design, have simultaneously that the structure is ingenious, easy operation, advantages such as labour saving and time saving.
Fourthly, the pressing plate (3) is inserted into the pressing plate clamping groove (1-2) of the bone plate (1), so that the problem of increasing the overall dimension of the bone nail plate in the thickness direction is avoided, and the bone nail plate is arranged in the flesh of the fracture part of a patient when in use, so that the influence on the comfort level caused by the increase of the thickness and the overall shape of the bone nail plate can be avoided;
fifthly, when the pressing plate (3) can be loosened or taken down after the first screw (4) is turned, the ends of two adjusting rods (2) respectively inserted into two first adjusting holes (1-1) of the corresponding bone plate (1) can slide left and right due to the loss of the constraint of the pressing plate (3); the ends of the two adjusting rods (2) can slide in the two first adjusting holes (1-1) of the bone plate (1) respectively by operating, so that the distance between the two bone plates (1) can be enlarged or reduced. When the distance required by work is adjusted, the pressure plate (3) is fixed in the pressure plate clamping groove (1-2) of the bone plate (1), and the ends of the two adjusting rods (2) are pressed and clamped, so that the distance between the two bone plates (1) can be adjusted or adjusted.
Preferably, the bone plate (1) is provided with a plurality of bone screw mounting holes (1-3). The bone plate (1) can be provided with a plurality of bone screws, and holes can be selected and arranged as required.
Furthermore, the device also comprises a direction adjusting ball head (6), a second screw (7) and a pressure lever (8); the bone plate (1) is provided with a second adjusting hole (1-4), and the second adjusting hole (1-4) comprises a spherical opening part (1-41) and a horn opening part (1-42); the direction-adjusting ball head (6) is assembled in the ball opening part (1-41), and a bone nail hole (6-1) for assembling the head part (9-1) of the bone nail (9) is arranged in the direction-adjusting ball head (6); a second threaded hole (1-5) is arranged on the bone plate (1) and is close to the second adjusting hole (1-4); the inner wall of the ball opening part (1-41) is provided with a middle hole (1-6) communicated with the inner wall of the second threaded hole (1-5); the compression bar (8) is arranged in the middle holes (1-6) and is in clearance fit with the middle holes; the screw part of the second screw (7) is in threaded fit with the second threaded hole (1-5), and the bottom end of the second screw (7) is provided with a conical part (7-1); an inclined surface (8-1) used for being in contact fit with the conical part (7-1) is arranged at one end, facing the second threaded hole (1-5), of the pressure lever (8), and a concave surface (8-2) used for being in contact fit with the direction-adjusting ball head (6) is arranged at the other end, facing the second adjusting hole (1-4), of the pressure lever (8).
By adopting the scheme, when the second screw (7) rotates and the screw rod of the second screw moves inwards in the second threaded hole (1-5), the conical part (7-1) of the second screw (7) can press the inclined plane (8-1) of the compression rod (8), the compression rod (8) can move towards the direction of the second adjusting hole (1-4), finally, the concave surface (8-2) of the compression rod (8) can be in contact fit with the outer wall surface of the direction-adjusting ball head (6) in the spherical opening part (1-41) and tightly press the direction-adjusting ball head (6), at the moment, the direction-adjusting ball head (6) is fixed in the spherical opening part (1-41) and cannot rotate, and when a bone nail (9) is installed in the bone nail hole (6-1) of the direction-adjusting ball head (6), the direction of the bone nail (9) is fixed.
And when the second screw (7) rotates and the screw rod of the second screw moves outwards in the second threaded hole (1-5), the conical part (7-1) of the second screw (7) can be separated from the inclined plane (8-1) which presses the pressure lever (8), at the moment, as the pressure lever (8) loses the pressing force on the direction-adjusting ball head (6) in the ball mouth part (1-41), the direction-adjusting ball head (6) can be shifted, and the direction-adjusting ball head (6) can rotate freely in the ball mouth part (1-41) to realize angle or direction change and adjustment. When the direction-adjusting ball head (6) is adjusted to an angle or direction required by work, the second screw (7) is rotated, and the screw rod of the second screw moves inwards in the second threaded hole (1-5), the conical part (7-1) of the second screw (7) can press the inclined plane (8-1) of the pressing rod (8), the pressing rod (8) can move towards the direction of the second adjusting hole (1-4), finally, the concave surface (8-2) of the pressing rod (8) can be in contact fit with the outer wall surface of the direction-adjusting ball head (6) and tightly press the direction-adjusting ball head (6), the angle or direction of the direction-adjusting ball head (6) is fixed, and meanwhile, when the bone nail (9) is installed in the bone nail hole (6-1) of the direction-adjusting ball head (6), the direction of the bone nail (9) is fixed and is the angle or direction required by work. In addition, the angle or direction of each bone screw can be independently adjusted according to the actual characteristics of the bone screws at different positions on the bone plate.
Furthermore, the outer wall surface of the concave surface (8-2) or/and the direction-adjusting ball head (6) is a rough surface. Therefore, the concave surface (8-2) and the direction-adjusting ball head (6) are in contact with each other, the friction coefficient is large, the resistance is large, and the problem of rotation and looseness is difficult to occur due to larger friction resistance when the direction-adjusting ball head (6) is tightly pushed by the concave surface (8-2).
Preferably, the bone nail hole (6-1) is a conical threaded hole. The conical threaded hole is matched with the head of the bone nail through conical external threads.
The invention has the beneficial effects that:
firstly, the pressure plate is inserted into the pressure plate clamping groove of the bone plate for positioning and limiting and then fixed in the pressure plate clamping groove of the bone plate by the first screw, so that after the pressure plate is fixed in the pressure plate clamping groove of the bone plate, the position accuracy of the pressure plate is ensured, and meanwhile, the pressure plate is limited in the bone plate and cannot be loosened and displaced;
secondly, according to the invention, the end part of the adjusting rod is inserted into the first adjusting hole of the bone plate, the outer side wall of the end part of the adjusting rod is provided with annular grooves which are distributed at equal intervals, when the pressing plate is fixed in the clamping groove of the pressing plate of the bone plate, the arc-shaped groove on the inner surface of the pressing plate can be contacted and matched with the outer side wall of the end part of the adjusting rod to be mutually compressed, and meanwhile, the arc-shaped clamping table on the inner wall of the arc-shaped groove is inserted into the annular groove and clamped, so that the adjusting rod is compressed and clamped by the arc-shaped clamping table to be limited to move or loosen along the axial direction, and the pressing plate is fixed and limited in the clamping groove of the pressing plate of the bone plate, so that after the pressing plate is positioned and fixed in the clamping;
thirdly, the inner surface of the pressure plate is provided with two arc-shaped grooves, the two arc-shaped grooves of the pressure plate are respectively used for pressing and clamping the end parts of the two adjusting rods at the same side, and the pressure plate can press and clamp the end parts of the two adjusting rods respectively inserted into the two first adjusting holes of the bone plate; consequently, adopt a clamp plate to realize compressing tightly the screens simultaneously to the tip of two regulation poles, can realize loosening simultaneously or compressing tightly the regulation with the tip of two regulation poles through this first screw knob, be different from current structural design, have simultaneously that the structure is ingenious, easy operation, advantages such as labour saving and time saving.
Fourthly, the pressure plate is inserted into the pressure plate clamping groove of the bone plate, so that the problem of increasing the overall dimension of the bone screw plate in the thickness direction is avoided, and the bone screw plate is arranged in the flesh of the fracture part of a patient when in use, so that the comfort degree is prevented from being influenced by the increase of the thickness and the overall dimension of the bone screw plate, and meanwhile, the bone plate is convenient to load and take out.
Fifthly, the pressing plate can be loosened or taken down after the first screw knob, and the ends of the two adjusting rods respectively inserted into the two first adjusting holes of the corresponding bone plate can slide left and right due to the loss of the restriction of the pressing plate; the ends of the two adjusting rods respectively slide in the two first adjusting holes of the bone plate, so that the distance between the two bone plates can be enlarged or reduced. When the distance required by the work is adjusted, the pressure plate is fixed in the pressure plate clamping groove of the bone plate, and the end parts of the two adjusting rods are pressed and clamped, so that the length of the distance between the two bone plates can be adjusted or adjusted.
Sixth, the invention can realize the adjustment of the working angle or direction of the bone screw installed on the bone plate after the angle or direction of the direction-adjusting ball head is adjusted and fixed, so as to realize the independent adjustment of the angle or direction of each bone screw according to the actual characteristics of the bone screws at different positions on the bone plate.
Drawings
FIG. 1 is a perspective view of a first embodiment of an adjustable modular bone screw plate of the present invention.
FIG. 2 is a fragmentary exploded view of a first embodiment of an adjustable modular bone screw plate of the present invention.
Fig. 3 is a perspective view of the platen.
Fig. 4 is a perspective view of the platen (when viewed in the other direction).
Fig. 5 is an enlarged view at a in fig. 4.
Fig. 6 is a schematic view of a bone plate according to a second embodiment of the present invention in a first operative configuration.
Fig. 7 is an enlarged view at B in fig. 6.
Fig. 8 is a schematic view of a bone plate according to a second embodiment of the present invention in a second operative configuration.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
the first embodiment is as follows: referring to fig. 1 to 5, an adjustable combined bone screw plate includes two bone plates 1, two adjustment rods 2, two compression plates 3, and two first screws 4.
In the present embodiment, the two bone plates 1 are strip-shaped plates, and the two bone plates 1 are oppositely arranged and symmetrically distributed.
In particular, in the present embodiment, the two bone plates 1 are arranged collinearly.
Two first adjusting holes 1-1 are respectively arranged on the opposite surfaces of the two bone plates 1, and the two first adjusting holes 1-1 are distributed in parallel at intervals.
Preferably, the direction of the center line of the first adjustment hole 1-2 and the length direction of the two bone plates 1 are parallel to each other.
The outer side walls of the two end parts of the two adjusting rods 2 are respectively provided with annular grooves 2-1 which are distributed at equal intervals.
Preferably, the annular groove 2-1 is greater than 2mm and greater than 5mm deep.
Preferably, the distance between two adjacent annular grooves 2-1 is less than 2 mm.
In addition, two pressure plate clamping grooves 1-2 are respectively arranged on the front surfaces of the two bone plates 1, the pressure plate clamping grooves 1-2 are communicated with the two first adjusting holes 1-1, and two first threaded holes 1-21 are respectively arranged on the bottom surfaces of the two pressure plate clamping grooves 1-2.
In this embodiment, the slot length direction of the pressing plate slot 1-2 is perpendicular to the central line direction of the first adjusting hole 1-1.
The two pressing plates 3 are respectively provided with two through holes 3-1.
Preferably, the first screw 4 is a socket head cap screw.
Preferably, the outer end of the through hole 3-1 is provided with a hexagon socket head cap screw countersunk hole. So that the head of the first screw 4 is sunk into the socket head cap screw countersunk hole. The first screw 4 can not protrude outwards to solve the problem of the external dimension of the thickness direction of the bone plate, and the bone screw plate is arranged in the flesh of the fracture part of a patient when in use, so that the situation that the comfort degree is influenced by the increase of the thickness of the bone screw plate can be avoided, and meanwhile, the bone plate can be conveniently put into and taken out.
Wherein the two adjusting rods 2 are distributed in parallel at intervals.
When in fixed assembly, one end parts of the two adjusting rods 2 are respectively inserted into the two first adjusting holes 1-1 of one bone plate 1; the other ends of the two adjusting rods 2 are respectively inserted into two first adjusting holes 1-1 of the other bone plate 1 and are in clearance fit; the two pressing plates 3 are respectively inserted into the pressing plate clamping grooves 1-2 of the two bone plates 1, and the screw rod parts of the two first screws 4 respectively penetrate through the two through holes 3-1 and then are respectively in threaded fit with the two first threaded holes 1-21.
The inner surfaces of the two pressing plates 3 are provided with two arc-shaped grooves 3-2.
Specifically, two arc-shaped grooves 3-2 on the inner surface of the pressure plate 3 correspond to the end positions of two adjusting rods 2 inserted into two first adjusting holes 1-1 of the bone plate 1 respectively and are matched in shape. When the pressing plate 3 is fixed in the pressing plate clamping groove 1-2 of the bone plate 1, the two arc-shaped grooves 3-2 of the pressing plate 3 can respectively contact with the end surfaces of the two adjusting rods 2 and are respectively pressed tightly.
The inner wall of the arc-shaped groove 3-2 is provided with an arc-shaped clamping table 3-21 which is inserted into the annular groove 2-1.
Referring to fig. 6, it is preferable that the arc-shaped lands 3-21 have a triangular or V-shaped or isosceles trapezoid cross section and the annular groove 2-1 has a cross section matching therewith.
Preferably, the arc-shaped clamping platforms 3-21 are distributed at equal intervals along the length direction of the arc-shaped groove 3-2, and the intervals are completely the same as the intervals distributed at equal intervals of the annular groove 2-1.
By adopting the scheme, the invention has the following characteristics and analysis:
firstly, since the pressing plate 3 is inserted into the pressing plate slot 1-2 of the bone plate 1 for positioning and limiting and then fixed in the pressing plate slot 1-2 of the bone plate 1 by the first screw 4, after the pressing plate 3 is fixed in the pressing plate slot 1-2 of the bone plate 1, since the position accuracy of the pressing plate 3 is ensured, and meanwhile, the pressing plate 3 is limited in the bone plate 1 and can not be loosely displaced with each other;
secondly, as the end of the adjusting rod 2 is inserted into the first adjusting hole 1-1 of the bone plate 1, the outer side wall of the end of the adjusting rod 2 is provided with the annular grooves 2-1 which are distributed at equal intervals, when the pressing plate 3 is fixed in the pressing plate clamping groove 1-2 of the bone plate 1, the arc-shaped groove 3-2 of the inner surface of the pressing plate 3 contacts and matches with the outer side wall of the end of the adjusting rod 2 to be pressed tightly, and the arc-shaped clamping table 3-21 on the inner wall of the arc-shaped groove 3-2 is inserted into the annular groove 2-1 and clamped tightly, the adjusting rod 2 is pressed tightly and clamped by the arc-shaped clamping table 3-21 to be limited to move or loosen along the axial direction, and the pressing plate 3 is fixed and limited in the pressing plate clamping groove 1-2 of the bone plate 1, therefore, after the pressing plate 3 is positioned and fixed in the pressing plate, the bone plate 1 and the adjusting rod 2 are pressed and clamped by the pressure plate 3 without relative looseness or displacement;
thirdly, because the inner surface of the pressure plate 3 is provided with two arc-shaped grooves 3-2, the two arc-shaped grooves 3-2 of the pressure plate 3 are respectively used for pressing and clamping the same side end parts of the two adjusting rods 2, and the pressure plate 3 can press and clamp the end parts of the two adjusting rods 2 respectively inserted into the two first adjusting holes 1-1 of the bone plate 1; consequently, adopt a clamp plate 3 can realize compressing tightly the screens simultaneously to two tip of adjusting pole 2, can realize loosening simultaneously or compress tightly the regulation with two tip of adjusting pole 2 through this 4 knobs of screw, be different from current structural design, have simultaneously that the structure is ingenious, easy operation, advantages such as labour saving and time saving.
Fourthly, the pressing plate 3 is inserted into the pressing plate clamping groove 1-2 of the bone plate 1, so that the problem of increasing the overall dimension of the bone screw plate in the thickness direction can be avoided, and the bone screw plate is arranged in the flesh of the fracture part of a patient during use, so that the comfort degree of the bone screw plate can be prevented from being influenced by the increase of the thickness of the bone screw plate, and meanwhile, the bone plate can be conveniently assembled and taken out.
Fifthly, when the first screw 4 is turned, the pressing plate 3 can be loosened or removed, and at the moment, the ends of the two adjusting rods 2 respectively inserted into the two first adjusting holes 1-1 of the corresponding bone plate 1 can slide left and right due to the loss of the constraint of the pressing plate 3; however, the ends of the two adjusting rods 2 can slide in the two first adjusting holes 1-1 of the bone plate 1 respectively by operating, so that the distance between the two bone plates 1 can be adjusted to be larger or smaller. When the distance required by the work is adjusted, the pressure plate 3 is fixed in the pressure plate clamping groove 1-2 of the bone plate 1, and the end parts of the two adjusting rods 2 are pressed and clamped, so that the length adjustment or adjustment of the distance between the two bone plates 1 can be realized.
Preferably, the bone plate 1 is provided with a plurality of bone screw mounting holes 1-3. The bone plate 1 can be provided with a plurality of bone screws, and holes can be selected as required for installation.
Example two: referring to fig. 6-8, the present embodiment is substantially the same as the first embodiment, except that: the first embodiment described above employs a bone plate 1 having a plurality of bone screw receiving holes 1-3. While the present embodiment employs a bone plate 1 having second adjustment holes 1-4.
Referring to fig. 6-8, in addition, the present embodiment further includes a direction-adjusting ball 6, a second screw 7 and a pressing rod 8.
Wherein the second adjusting hole 1-4 comprises a ball mouth part 1-41 and a bell mouth part 1-42.
Specifically, the outer shape of the ball mouth part 1-41 is small at two ends and large in the middle, and the large end of the horn mouth part 1-42 faces outwards and faces away from the ball mouth part 1-41.
The direction-adjusting ball head 6 is assembled in the ball opening part 1-41, and a bone nail hole 6-1 for assembling the head part 9-1 of the bone nail 9 is arranged in the direction-adjusting ball head 6.
In this embodiment, the bone screw hole 6-1 is a tapered threaded hole. So that the head of the bone screw 9 can be screwed into said bone screw hole 6-1.
The bone plate 1 is provided with second threaded holes 1-5 at positions close to the second adjusting holes 1-4; the inner wall of the ball mouth part 1-41 is provided with a middle hole 1-6 communicated with the inner wall of the second threaded hole 1-5; the compression bar 8 is arranged in the middle holes 1-6 and is in clearance fit with the middle holes; the screw part of the second screw 7 is in threaded fit with the second threaded hole 1-5, and the bottom end of the second screw 7 is provided with a conical part 7-1; the end of the pressure lever 8 facing the second threaded hole 1-5 is provided with an inclined surface 8-1 for contacting and matching with the conical part 7-1, and the other end of the pressure lever 8 facing the second adjusting hole 1-4 is provided with a concave surface 8-2 for contacting and matching with the direction adjusting ball head 6.
Preferably, the outer end of the second threaded hole 1-5 is provided with a countersunk hole, and the head of the second screw 7 can be sunk into the countersunk hole.
By adopting the scheme, when the second screw 7 rotates and the screw rod of the second screw moves inwards in the second threaded hole 1-5, the conical part 7-1 of the second screw 7 can press against the inclined surface 8-1 of the compression rod 8, the compression rod 8 can move towards the direction of the second adjusting hole 1-4, finally the concave surface 8-2 of the compression rod 8 can be contacted and matched with the outer wall surface of the direction-adjusting ball 6 in the ball opening part 1-41 and tightly press against the direction-adjusting ball 6, at the moment, the direction-adjusting ball 6 is fixed in the ball opening part 1-41 without rotating, and when the bone nail 9 is installed in the bone nail hole 6-1 of the direction-adjusting ball 6, the direction of the bone nail 9 is fixed.
When the second screw 7 rotates and the screw rod of the second screw moves outwards in the second threaded hole 1-5, the conical part 7-1 of the second screw 7 is separated from the inclined surface 8-1 which presses against the pressure lever 8, at this time, as the pressure lever 8 loses the pressing force on the direction-adjusting ball head 6 in the spherical opening part 1-41, the direction-adjusting ball head 6 can be shifted, and the direction-adjusting ball head 6 can rotate freely in the spherical opening part 1-41 to realize angle or direction change and adjustment. When the direction-adjusting ball head 6 is adjusted to an angle or direction required by work, the second screw 7 is rotated and the screw rod of the second screw 7 moves inwards in the second threaded hole 1-5, the conical part 7-1 of the second screw 7 presses against the inclined surface 8-1 of the compression bar 8, the compression bar 8 moves towards the direction of the second adjusting hole 1-4, finally the concave surface 8-2 of the compression bar 8 contacts and matches with the outer wall surface of the direction-adjusting ball head 6 and presses against the direction-adjusting ball head 6, the angle or direction of the direction-adjusting ball head 6 is fixed, and meanwhile, when the bone nail 9 is installed in the bone nail hole 6-1 of the direction-adjusting ball head 6, the direction of the bone nail 9 is fixed and is the angle or direction required by work. In addition, the angle or direction of each bone screw can be independently adjusted according to the actual characteristics of the bone screws at different positions on the bone plate.
As a first mounting or operating state of the bone screw 9, see fig. 6-7, the bone screw 9 is mounted on the bone plate 1 perpendicular thereto. As a second mounting or operating state of the bone screw 9, see fig. 8, the bone screw 9 is mounted on the bone plate 1 such that it is non-perpendicular to the bone screw.
Furthermore, the outer wall surface of the concave surface 8-2 or/and the direction-adjusting ball head 6 is a rough surface. Therefore, the concave surface 8-2 and the direction-adjusting ball head 6 are in contact with each other, the friction coefficient is large, the resistance is large, and the problem of rotation and looseness is difficult to occur due to larger friction resistance when the direction-adjusting ball head 6 is tightly propped by the concave surface 8-2.
Preferably, a plurality of concave-convex structures which are uniformly distributed and matched with each other are arranged on the outer wall surfaces of the concave surface 8-2 and the direction-adjusting ball head 6. Preferably, the bone screw hole 6-1 is a tapered threaded hole. The conical threaded hole is matched with the head of the bone nail through conical external threads.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (5)
1. The utility model provides a combination formula bone nail board with adjustable which characterized in that: comprises two bone plates (1), two adjusting rods (2), two pressing plates (3) and two first screws (4);
the two bone plates (1) are oppositely arranged, two first adjusting holes (1-1) are respectively arranged on the opposite surfaces of the two bone plates (1), and the two first adjusting holes (1-1) are distributed in parallel at intervals;
the outer side walls of the two end parts of the two adjusting rods (2) are respectively provided with an annular groove (2-1) which is distributed at equal intervals;
the front surfaces of the two bone plates (1) are respectively provided with a pressure plate clamping groove (1-2), the pressure plate clamping grooves (1-2) are communicated with the two first adjusting holes (1-1), and the groove bottom surfaces of the two pressure plate clamping grooves (1-2) are respectively provided with a first threaded hole (1-21);
the two pressing plates (3) are respectively inserted into the pressing plate clamping grooves (1-2) of the two bone plates (1), and the two pressing plates (3) are respectively provided with a through hole (3-1);
the screw rod parts of the two first screws (4) respectively penetrate through the two through holes (3-1) and then are respectively in threaded fit with the two first threaded holes (1-21);
the two adjusting rods (2) are distributed in parallel at intervals;
one end parts of the two adjusting rods (2) are respectively inserted into two first adjusting holes (1-1) of one bone plate (1); the other ends of the two adjusting rods (2) are respectively inserted into two first adjusting holes (1-1) of the other bone plate (1);
the inner surfaces of the two pressure plates (3) are provided with two arc-shaped grooves (3-2);
the arc-shaped groove (3-2) is matched with the end part of the adjusting rod (2) in shape, and an arc-shaped clamping table (3-21) which is inserted into the annular groove (2-1) is arranged on the inner wall of the arc-shaped groove (3-2);
the middle parts of the two adjusting rods (2) are fixed into a whole through a connecting plate (5).
2. The adjustable modular bone screw plate of claim 1, wherein: the bone plate (1) is provided with a plurality of bone nail mounting holes (1-3).
3. The adjustable modular bone screw plate of claim 1, wherein: the device also comprises a direction adjusting ball head (6), a second screw (7) and a pressure lever (8);
the bone plate (1) is provided with a second adjusting hole (1-4), and the second adjusting hole (1-4) comprises a spherical opening part (1-41) and a horn opening part (1-42);
the direction-adjusting ball head (6) is assembled in the ball opening part (1-41), and a bone nail hole (6-1) for assembling the head part (9-1) of the bone nail (9) is arranged in the direction-adjusting ball head (6);
a second threaded hole (1-5) is arranged on the bone plate (1) and is close to the second adjusting hole (1-4);
the inner wall of the ball opening part (1-41) is provided with a middle hole (1-6) communicated with the inner wall of the second threaded hole (1-5);
the compression bar (8) is arranged in the middle holes (1-6) and is in clearance fit with the middle holes;
the screw part of the second screw (7) is in threaded fit with the second threaded hole (1-5), and the bottom end of the second screw (7) is provided with a conical part (7-1);
an inclined surface (8-1) used for being in contact fit with the conical part (7-1) is arranged at one end, facing the second threaded hole (1-5), of the pressure lever (8), and a concave surface (8-2) used for being in contact fit with the direction-adjusting ball head (6) is arranged at the other end, facing the second adjusting hole (1-4), of the pressure lever (8).
4. An adjustable modular bone screw plate as claimed in claim 3, wherein: the outer wall surface of the concave surface (8-2) or/and the direction-adjusting ball head (6) is a rough surface.
5. An adjustable modular bone screw plate as claimed in claim 3, wherein: the bone nail hole (6-1) is a conical threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910601858.6A CN110279460B (en) | 2019-07-05 | 2019-07-05 | Adjustable combined bone nail plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910601858.6A CN110279460B (en) | 2019-07-05 | 2019-07-05 | Adjustable combined bone nail plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110279460A CN110279460A (en) | 2019-09-27 |
| CN110279460B true CN110279460B (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910601858.6A Expired - Fee Related CN110279460B (en) | 2019-07-05 | 2019-07-05 | Adjustable combined bone nail plate |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112547858B (en) * | 2020-12-23 | 2022-03-25 | 安徽力源数控刃模具制造有限公司 | Deflection compensation device convenient for fixing workbench |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022767B (en) * | 2004-07-07 | 2011-03-30 | 德普伊产品公司 | Bone plate system with bone screws fixed by secondary compression |
| US7621914B2 (en) * | 2004-10-28 | 2009-11-24 | Biodynamics, Llc | Adjustable bone plate |
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| CN110279460A (en) | 2019-09-27 |
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