CN211658308U

CN211658308U - Combined pressurizing locking screw and matched screwdriver

Info

Publication number: CN211658308U
Application number: CN201921509858.5U
Authority: CN
Inventors: 杨惠林; 徐达强
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-10-13
Anticipated expiration: 2029-09-11

Abstract

The utility model discloses a combination pressurization locking screw, its characterized in that: the assembly comprises an assembly A, an assembly B, an assembly C and an assembly D, wherein the assembly A comprises a first external thread 1 and a second external thread 2, and a first clamping structure 3 is arranged at one end, close to the second external thread 2, of the assembly A; the component B is a hollow cylindrical structure, a first internal thread 4 and a second internal thread 5 are arranged in the component B, and a pressurizing structure is arranged at the end part, close to the second internal thread 5, of the component B; the component C comprises a second clamping structure 6 arranged at one end part and a hollow structure provided with a third internal thread 7 at the other end part; the assembly D comprises a third external thread 8 and a fourth external thread 9. Compared with the prior art, the utility model provides a combination forcing screw that can lock to reduce the incidence that internal fixation became invalid, the fracture deformity postpones healing and bone nonunion.

Description

Combined pressurizing locking screw and matched screwdriver

Technical Field

The utility model relates to a medical fracture fixing device especially relates to be applied to the internal fixation system that pressurizes between the fracture piece and fix.

Background

The lag screw is the simplest and most effective endophyte for treating fractures needing operations, such as intra-articular fractures, dentate process fractures and the like; the combined compression screw involved in the prior art is an unlocked two-component lag screw, and the working principle is as follows: in the process of pressurizing the combined pressurizing screw, one component of the screw rotates around the other component, so that the length of the screw is shortened, the fracture seam is closed, pressurizing force is generated among fracture blocks, and the structural stability of the fracture part is reconstructed. However, if the external force applied to the fracture block is greater than the frictional force for maintaining the fracture site stable, and the fracture block is rotated, the two components of the screw may be rotated, so that the length of the combined screw is increased, the pressurizing action of the screw is reduced, the internal fixation is failed, the fracture deformity is delayed to heal, and even the bone is not healed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: overcomes the defects in the prior art, solves the problems in the prior art, and provides a combined compression screw capable of being locked, thereby reducing the incidence of internal fixation failure, delayed union of fracture deformity and bone nonunion.

In order to solve the technical problem, realize its practical novel purpose, the utility model provides a following technical scheme: a combined compression locking screw comprises a compression structure, a component A, a component B, a locking structure, a component C and a component D;

the assembly A is provided with a first external thread 1 and a second external thread 2, and one end of the assembly A, which is close to the second external thread 2, is provided with a first clamping structure 3;

the component B is a hollow cylindrical structure, a first internal thread 4 and a second internal thread 5 are arranged in the hollow structure of the component B, and the first internal thread 4 is matched with the second external thread 2 of the component A so as to realize the connection of the component A and the component B; the end part of the component B close to the second internal thread 5 is provided with a pressurizing structure;

the component C comprises a second clamping structure 6 arranged at one end and a hollow cylindrical structure arranged at the other end, a third internal thread 7 is arranged in the hollow cylindrical structure, and the second clamping structure 6 is matched with the first clamping structure 3 of the component A so as to realize the connection of the component A and the component C;

the subassembly D includes third external screw thread 8 and fourth external screw thread 9, third external screw thread 8 with the third internal thread 7 of subassembly C matches each other to realize being connected of subassembly C and subassembly D, fourth external screw thread 9 with the second internal thread 5 of subassembly B matches each other, in order to realize being connected of subassembly B and subassembly D.

As a preferred solution for the combination compression locking screw: the pitch and thread rotation direction of the third external thread 8 and the fourth external thread 9 of the component D are the same.

As a preferred option for a combination compression locking screw; the second external thread 2 of the component A and the first internal thread 4 of the component B are a first pair of threads, the third internal thread 7 of the component C and the third external thread 8 of the component D are a second pair of threads, and the second internal thread 5 of the component B and the fourth external thread 9 of the component D are a third pair of threads; the first pair of threads and the second and third pairs of threads have different thread pitch and/or thread rotation direction, and the second and third pairs of threads have the same thread pitch and thread rotation direction.

As a preferred solution for the combination compression locking screw: the pressurizing structure of the component B is an expanded hemispherical structure arranged at the end part, close to the second internal thread 5, of the component B, the cross section area of the pressurizing structure of the component B is the largest part of the component B, a fifth external thread 10 is arranged on the surface of the pressurizing structure of the component B, and the fifth external thread 10 can be screwed into a bone or a matched bone fracture plate.

As a preferred solution for the combination compression locking screw: the first clamping structure 3 of the component A is a hollow structure, and the first clamping structure 3 is a hollow prismatic structure, a hollow cross structure, a hollow straight structure or a hollow polygonal star structure; the second clamping structure 6 of the component C is a prismatic structure, a cross structure, a straight structure or a polygonal star structure matched with the first clamping structure 3 of the component A.

As a preferred solution for the combination compression locking screw: be provided with first scale mark 11 between subassembly A's first external screw thread 1 and the second external screw thread 2, first scale mark 11 is used for instructing subassembly B assembles the degree of depth on the subassembly A, promptly when subassembly B first internal screw thread 4 matches each other with subassembly A's second external screw thread 2, subassembly B is close to subassembly A's end with first scale mark 11 flushes.

As a preferred solution for the combination compression locking screw: the outer surface of the component B is provided with a second graduation line 12, and the second graduation line 12 is used for indicating the depth of the component B implanted into the bone, namely when the assembled component A and the assembled component B are implanted into the bone, the second graduation line 12 on the component B is flush with the surface of the bone.

As a preferred solution for the combination compression locking screw: a first hollow cross structure 14 is arranged in the pressurizing structure of the component B, and a screwdriver matched with the component B can operate and control the component B through the first hollow cross structure 14.

As a preferred solution for the combination compression locking screw: one end of the component D, which is close to the fourth external thread 9, is provided with a first cross structure 17, and a screwdriver matched with the component D can operate and control the component D through the first cross structure 17.

As a preferred solution for the combination compression locking screw: the surface of the component A and/or the component B is formed with an uneven structure which can be filled with a medicament beneficial to bone healing.

As a preferred solution for the combination compression locking screw: the surface of the component A and/or the component B is subjected to sand blasting or porous and hydroxyapatite protruding treatment to form micropores, and the sand blasting or the micropores on the surface of the component A and/or the component B are beneficial to bone ingrowth and improve the stability of a bone-internal fixation structure.

As a preferred solution for the combination compression locking screw: the component A, the component C and the component D can be hollow, and the hollow part can be inserted with a guide pin, so that the operation accuracy is improved.

A screwdriver matched with a combined pressure locking screw is provided with a screwdriver E, a screwdriver F, a screwdriver G and a screwdriver H;

one end of the screwdriver E comprises a third clamping structure 13 matched with the first clamping structure 3 of the component A, and the first clamping structure 3 is matched with the third clamping structure 13, so that the screwdriver E can operate and control the component A;

one end of the screw driver F is a second hollow cross structure 15, a first hollow cross structure 14 is arranged in the pressurizing structure of the component B, and the second hollow cross structure 15 is matched with the first hollow cross structure 14, so that the screw driver F can operate and control the component;

one end of the screwdriver G comprises a sixth external thread 16 matched with the third internal thread 7 of the component C, and the third internal thread 7 and the sixth external thread 16 are matched with each other, so that the screwdriver G can operate the component C;

one end of the screwdriver H is a second cross-shaped structure 18, one end of the component D close to the fourth external thread 9 is provided with a first cross-shaped structure 17, and the second cross-shaped structure 18 is matched with the first cross-shaped structure 17, so that the screwdriver H can operate the component D;

the screwdriver F is a hollow structure, and after the screwdriver F is connected with the component B through the second hollow cross structure 15 and the first hollow cross structure 14, the screwdriver E, the screwdriver G and the screwdriver H can respectively penetrate through the screwdriver F to realize the operation and control of the component A, the component C and the component D.

As a preferable mode of the driver: the screwdriver E and the screwdriver F are respectively provided with a first locking structure 19 and a second locking structure 20 which are matched with each other, the second locking structure 20 on the screwdriver F is pushed, and the locking between the screwdriver E and the screwdriver F is completed; the second locking structure 20 on the driver F is pushed reversely to release the locking between the driver E and the driver F.

The utility model discloses a beneficial technological effect includes at least as follows:

1. combination pressurization locking screw, the simple structure of screw pressurization and locking is reliable, convenient operation, the learning curve is mild, the doctor of being convenient for accumulates experience and promotes the degree of accuracy of operation: the second external thread 2 of the component A and the first internal thread 4 of the component B are a first pair of threads, the component B rotates by taking the component A as a shaft, the length of a screw is shortened, a fracture seam is closed, the first thread 1 of the component A is pulled, cancellous bones around the first thread 1 are compressed, a pressurizing structure of the component B is combined to act on a bone/gasket/bone fracture plate, pressurizing force is generated, and fracture is pressurized and fixed; the component C and the component D form a structure for locking the component A and the component B, firstly, the second clamping structure 6 of the component C is matched with the first clamping structure 3 of the component A, and the component C controls the component A; the third external thread 8 of the component D and the third internal thread 7 of the component C are a second pair of threads to realize the connection of the component D and the component C, the fourth external thread 9 of the component D and the second internal thread 5 of the component B are a third pair of threads to realize the connection of the component D and the component C, and the thread pitches and the thread rotating directions of the second pair of threads and the third pair of threads are the same, so that the mutual connection process of the component D, the component B and the component C is smoothly and synchronously carried out; screwing the component D to realize the locking of the component D with the component B and the component C; the essential condition that the component A and the component B rotate relatively is that the first pair of threads and the second and third pairs of threads rotate synchronously, the innovative arrangement of the patent enables the three pairs of threads to not realize synchronous and same-speed rotation, namely, the thread pitches and/or thread rotating directions of the first pair of threads and the second and third pairs of threads are different, the essential condition that the component A and the component B rotate relatively does not exist, and the component A and the component B are in a locking state after the component C and the component D are connected with the component A and the component B.

There is an embodiment according to the present invention, namely: the first pair of threads and the second and third pairs of threads have the same pitch and thread direction of rotation, and locking between the assemblies is achieved by tightening the second and third pairs of threads, which is not as effective as locking with different pitches and/or thread directions of rotation.

2. After the combination pressurization locking screw implant is internal, be in the locking state between each subassembly of screw, can improve combination pressurization locking screw structural stability itself, act on one of them fracture piece when external force, make it will be relative when another fracture piece takes place to rotate, the fracture piece synchronous revolution of another fracture piece of combination pressurization screw control and external force action that is in the locking state to reduce fracture internal fixation inefficacy, the incidence that the fracture deformity postpones healing and bone nonunion.

3. The surface of the component A and/or the component B of the combined compression locking screw is provided with the uneven structure, and the uneven structure can be filled with medicines which are beneficial to bone healing, so that the speed of bone healing is further accelerated; the surface of the component A and/or the component B is subjected to sand blasting or porous and hydroxyapatite protruding treatment to form micropores, so that bone ingrowth is facilitated, the stability of a bone-internal fixation structure is improved, and the incidence rate of internal fixation failure is reduced.

4. Combination pressurization locking screw's structural design make the doctor can carry out standardized operation more when the operation, be favorable to accumulating experience rapidly, promote the degree of accuracy of doctor's operation, optimize doctor's learning efficiency, more be favorable to young doctor to promote level and experience.

Drawings

FIG. 1 is a schematic structural view of a component A of a combination compression locking screw of the present invention;

figure 2 is an end view of the assembly a provided with a first snap-in structure 3;

FIG. 3 is a schematic structural view of a component B of a combination compression locking screw of the present invention;

fig. 4 is a schematic end view of the module B provided with a first hollow cross 14;

FIG. 5 is a schematic view of the combination of component A and component B;

FIG. 6 is a schematic structural view of a component C of a combination compression locking screw of the present invention;

FIG. 7 is a schematic view of the combination of component A and component C;

FIG. 8 is a schematic structural view of a component D of a combination compression locking screw of the present invention;

FIG. 9 is a schematic end view of assembly D near one end of the fourth external thread 9;

FIG. 10 is a schematic structural view of a combination of module C and module D;

FIG. 11 is a schematic structural view of a combination of module B and module D;

FIG. 12 is a schematic structural view of a combination of component A, component B, component C and component D;

fig. 13 is a schematic structural view of a screwdriver E for assembling a compression locking screw according to the present invention;

fig. 14 is a schematic structural view of a screwdriver F for assembling a compression locking screw according to the present invention;

fig. 15 is a schematic structural view of a combination of a driver E and a driver F;

fig. 16 is a schematic structural view of the combined screwdriver E and screwdriver F of the present invention matching with the combination a and assembly B;

fig. 17 is a schematic structural view of a screwdriver G associated with a combination compression locking screw of the present invention;

fig. 18 is a structural schematic view of a combination of a driver G and a driver F;

FIG. 19 is a schematic view of the connection structure between the screwdriver G and the component C of the present invention

Fig. 20 is a schematic structural view of a driver H associated with a combination compression locking screw of the present invention;

fig. 21 is a structural schematic view of a combination of a driver H and a driver F;

fig. 22 is a schematic structural view of the connection of the driver H and the component D;

fig. 23 is a structural view of an implanted bone of a combination compression locking screw of the present invention.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings 1-23 and the embodiments, wherein: 1. a first external thread; 2. a second external thread; 3. a first clamping structure; 4. a first internal thread; 5. a second internal thread; 6. a second clamping structure; 7. a third internal thread; 8. a third external thread; 9. a fourth external thread; 10. a fifth external thread; 11. a first scale mark; 12. a second scale mark; 13. a third clamping structure; 14. a first hollow cross structure; 15. a second hollow cross structure; 16. a sixth external thread; 17. a first cross structure; 18. a second cross-shaped structure; 19. a first locking structure; 20. a second locking structure.

As shown in fig. 1 to 12, the utility model discloses a combined compression locking screw, which comprises a component a, a component B, a component C and a component D.

Referring to fig. 1 and 2, the component a is a cylindrical structure, a first external thread 1 and a second external thread 2 are disposed on the surface of the component a, and a first clamping structure 3 is disposed at one end of the component a close to the second external thread 2.

Referring to fig. 3 and 4, the component B is a hollow cylindrical structure with a first internal thread 4 and a second internal thread 5 inside; a pressurizing structure is arranged at the end part, close to the second internal thread 5, of the component B, the pressurizing structure of the component B is an expanded hemispherical structure, and the cross section area of the expanded hemispherical structure is the largest part of the component B; the surface of the compression structure of the component B is provided with a fifth external thread 10 which can be screwed into a bone or a mating bone plate, although the compression structure can be other structures known in the art.

In one embodiment, the outer surface of the component B is provided with a second graduation mark 12 (see fig. 3), and the second graduation mark 12 is used for guiding the depth of the component B implanted into the bone, namely, when the assembled component a and the assembled component B are implanted into the bone, the second graduation mark 12 on the component B is flush with the bone surface. The most suitable depth of implantation of component B into the bone can now also be recorded based on clinical experience

Fig. 5 is a structural schematic diagram of the combination of the component a and the component B, and the second external thread 2 of the component a and the first internal thread 4 of the component B are matched with each other to realize the connection of the component a and the component B. In a preferred embodiment, a first scale mark 1 (see fig. 1) is arranged between the first external thread 1 and the second external thread 2 of the component a, and the first scale mark 1 is used for guiding the depth of the component B assembled on the component a, namely, when the component B is rotated on the second external thread 2 of the component a through the first internal thread 4, the end of the component B close to the component a is flush with the first scale mark 11.

In order to accelerate the speed of bone healing, in one embodiment, the surface of component a and/or component B is made rugged (which does not affect the function of components a and B), and then the rugged structure is filled with a medicament for facilitating bone healing.

In order to reduce the incidence of loosening of the screw in the bone and to improve the stability of the screw-bone structure, in a preferred embodiment the surface of said component a and/or component B is sandblasted or otherwise porous and hydroxyapatite-protruding to form pores to facilitate bone ingrowth.

Referring to fig. 6, the assembly C is a cylindrical structure, and includes a second clamping structure 6 disposed at one end and a hollow structure disposed at the other end, where the hollow structure is provided with a third internal thread 7; the second clamping structure 6 of the component C is matched with the first clamping structure 3 of the component A and is meshed with the first clamping structure to realize the connection of the component A and the component C; it should be noted that the first latch structure 3 of the assembly a and the second latch structure 6 of the assembly C are a latch structure having a protrusion and a recess, so as to achieve mutual engagement.

Fig. 7 is a schematic structural diagram of an embodiment of a combination of a component C and a component a, where the first clamping structure 3 of the component a has a recess, i.e. a hollow structure, and specifically, the first clamping structure 3 may be a hollow prism-shaped structure (refer to fig. 2), a hollow cross-shaped structure, a hollow straight-line structure, a hollow polygonal star-shaped structure, or the like. Correspondingly, the second clamping structure 6 of the component C is a convex portion matching the first clamping structure 3 of the component a, such as a convex prism structure, a cross structure, a straight structure or a polygonal star structure.

In another embodiment, the first clamping structure 3 of the component a has a convex portion, such as a convex prism-like structure, a cross-like structure, a straight structure, or a polygonal star-like structure, and the second clamping structure 6 of the component C has a concave portion, i.e. a hollow structure, such as a hollow prism-like structure, a hollow cross-like structure, a hollow straight structure, or a hollow polygonal star-like structure, which matches the convex portion of the component a.

Of course, the first clamping structure 3 and the second clamping structure 6 may also be other clamping structures as long as the function of connecting and fixing the assembly a and the assembly C can be realized.

Referring to fig. 8 and 9, the assembly D is formed by connecting two cylinders with different diameters, and the axes of the two cylinders are on a straight line; the surface of the cylinder with small diameter is provided with a third external thread 8, and the surface of the cylinder with large diameter is provided with a fourth external thread 9. The third external thread 8 is matched with the third internal thread 7 of the component C to realize the connection between the component C and the component D, and the structure schematic diagram after the connection please refer to fig. 10. The fourth external thread 9 matches with the second internal thread 5 of the component B to realize the connection between the component B and the component D, and the schematic diagram after the connection refers to fig. 11.

Fig. 12 is a schematic structural diagram of a combination of the component a, the component B, the component C, and the component D, and the combination process may be: be connected with first internal thread 4 through second external thread 2 at subassembly A and subassembly B, then, first joint structure 3 matches with second joint structure 6 in order to realize being connected of subassembly A and subassembly C after subassembly C inserts subassembly B hollow structure, and next, it is rotatory after subassembly D inserts subassembly B hollow structure subassembly D, makes it pass through third external thread 8 and third internal thread 7 with subassembly C links to each other, simultaneously, subassembly D pass through fourth external thread 9 and second internal thread 5 with subassembly B links to each other.

As shown in fig. 13 to 22, the present invention also discloses a set of drivers for the above-mentioned combination compression locking screw, including a driver E, a driver F, a driver G and a driver H.

Referring to fig. 13, the screw driver E is a cylindrical structure, and one end of the screw driver E includes a third clamping structure 13 matching with the first clamping structure 3 of the component a, and when the first clamping structure 3 and the third clamping structure 13 are engaged, the screw driver E can operate the component a.

Referring to fig. 14, the screw driver F is a hollow cylindrical structure, a second hollow cross structure 15 is disposed on an end surface of one end of the screw driver F, a first hollow cross structure 14 is disposed in the pressurizing structure of the component B, and the second hollow cross structure 15 is embedded with the first hollow cross structure 14, so that the screw driver F can operate the component B.

Referring to fig. 17, the screw driver G is a cylindrical structure, one end of the screw driver G includes a sixth external thread 16 matching with the third internal thread 7 of the component C, and the other end of the screw driver G is provided with a rough surface to facilitate the operation of the screw driver G; after the third internal thread 7 and the sixth external thread 16 are matched, the driver G can operate the assembly C, as shown in fig. 19.

Referring to fig. 20, the screw driver H has a cylindrical structure with a second cross-shaped structure 18 at one end, the first cross-shaped structure 17 is disposed at one end of the component D close to the fourth external thread 9, and after the protruding second cross-shaped structure 18 and the first cross-shaped structure 17 are engaged, the screw driver H can operate the component D, as shown in fig. 22.

Referring to fig. 15, 18 and 21, the outer diameter of the columnar structure of the drivers E, G and H is smaller than or equal to the inner diameter of the hollow structure of the driver F, and after the driver F is connected to the component B through the second hollow cross structure 15 and the first hollow cross structure 14, the drivers E, G and H can respectively pass through the driver F to realize the operation of the component a, the component C and the component D.

In a preferred embodiment, the driver E and the driver F are respectively provided with a first locking structure 19 and a second locking structure 20 which are matched with each other, the second locking structure 20 on the driver F is pushed to lock the second locking structure 20 and the first locking structure 19, and the locking between the driver E and the driver F is completed; the second locking structure 20 on the driver F is pushed reversely to release the locking state between the second locking structure 20 and the first locking structure 19, thereby releasing the locking between the driver E and the driver F.

In a specific embodiment, the surfaces of the driver E and the driver F are respectively provided with scales for recording the rotation angle of the driver F relative to the driver E.

Please refer to fig. 23, which is a schematic structural diagram of the combined compression locking screw implanted into bone, and the combination process may be: firstly, the combined compression locking screw component A and the component B are assembled according to the first graduation line 11 of the component A and then implanted into the bone, and the screw is stopped from being implanted when the second graduation line 12 of the component B is flush with the surface of the bone; then, the screw driver E controls the control component A not to rotate, the screw driver F rotates the first internal thread 4 of the component B to rotate (a first pair of threads) on the second external thread 2 of the component A, so that the overall length of the screw is shortened, the fracture seam is closed, the first external thread 1 of the component A is pulled up and compressed, a pressurizing structure of the component B is combined to act on the surface of the bone/gasket/bone fracture plate, pressurizing force is generated, and the structural stability of the fracture part is reconstructed; next, inserting the component C into the hollow structure of the component B by the screwdriver G through the hollow structure of the screwdriver F, so that the second clamping structure 6 of the component C and the first clamping structure 3 of the component A are embedded with each other, and connecting the component C and the component A; next step, bottle opener H inserts subassembly D in the hollow structure of subassembly B through bottle opener F hollow structure, and rotating assembly D realizes the synchronous matching of subassembly D third external screw thread 8 and subassembly C third internal thread 7 (the second is to the screw thread) and subassembly D fourth external screw thread 9 and subassembly B second internal thread 5 (the third is to the screw thread), the utility model discloses a unique design, promptly: the pitches and the rotation directions of the second pair of threads and the third pair of threads are the same, so that the connection of the component D with the component B and the component C is smoothly carried out; finally, tighten component D so that component D locks with component B and component C, at this point the prerequisite for component a and component B to rotate is that the pitch of the three pairs of threads and the direction of rotation of the threads are the same, but the utility model discloses a unique design, promptly: the first pair of threads and the second and third pairs of threads differ in pitch and/or direction of thread rotation such that the prerequisite for rotation of component a and component B is absent, component a and component B thus being in a locked state; the locked state of assembly a and assembly B has unique advantages: when external force acts on one of the fracture blocks to enable the fracture block to rotate relative to the other fracture block, the combined compression screw in the locking state controls the other fracture block to rotate synchronously with the fracture block acted by the external force, so that the two fracture blocks keep linkage, and the incidence of fracture internal fixation failure, delayed union of fracture deformity and bone nonunion is reduced.

The ipsilateral intra-articular fracture referred to in the present invention means the side that contacts the compression structure of the component B, and the contralateral intra-articular fracture means the fracture corresponding to the ipsilateral intra-articular fracture.

The technical proposal of the utility model is suitable for the treatment of various fractures, in particular to intra-articular fracture, femoral neck fracture, dentate process fracture and the like. The following description is specifically made in connection with the use of the device of the present invention in the tibial plateau fracture surgery:

the first step is as follows: according to the standard operation flow, disinfecting and laying a sheet, exposing the fracture according to the standard operation approach, resetting, temporarily fixing the fracture by using a Kirschner wire or a resetting clamp, and confirming good resetting through fluoroscopy; and (3) punching a proper part of the fracture block in the ipsilateral joint to the fracture block in the contralateral joint by using the special rotating head for operation, and measuring the depth of the nail hole.

The second step is that: based on the depth of the nail hole being measured, the appropriate length of assembly a and assembly B is selected and assembled so that the end of assembly B is flush with the first graduation marks 11 on assembly a. According to the requirement, the groove structures on the surfaces of the component A and the component B are filled with substances for promoting bone healing, such as bone morphogenetic proteins and the like.

The third step: combining the screw driver E and the screw driver F, so that a third clamping structure 13 at the tail end of the screw driver E is embedded with the first clamping structure 3 at the tail part of the component A, and a second hollow cross structure 15 at the tail end of the screw driver F is embedded with the first hollow cross structure 14 of the component B; next, the second locking structure 20 of the external driver F is pushed to act on the first locking structure 19 of the internal driver E, and the locking between the driver E and the driver F is completed, in which state the component a, the component B, the driver E and the driver F are integrated as shown in fig. 16. Next, the assembled component a and component B is implanted into the bone by the locked driver E and driver F until the second graduation marks 12 on component B are flush with the bone surface. Then the second locking structure 20 on the external screw driver F is pushed reversely, so that the screw driver E and the screw driver F are unlocked, the screw driver E controls the component A not to rotate, the screw driver F rotates clockwise, the component B rotates by taking the component A as an axis, the screw length is shortened, the fracture seam is closed, the first external thread 1 of the component A is lifted, the first external thread 1 is compressed, the pressurizing structure of the component B is combined to act on the bone surface, the pressurizing force is generated, and the structural stability of the fracture part is rebuilt. The doctor carefully inspects the change of the pressure in the process, and determines the rotation angle when the screw is properly screwed according to the scales arranged on the screwdriver E and the screwdriver F; recording the angle to accumulate clinical experience for the next operation;

the fourth step: locking the screw: (1) selecting an assembly C with a proper length according to the selected assembly A and the selected assembly B, and matching a sixth external thread 16 of the screwdriver G with a third internal thread 7 of the assembly C to realize the operation and control of the assembly C by the screwdriver G; (2) taking out the screwdriver E from the screwdriver F, inserting the component C into the hollow structure of the component B through the hollow structure of the screwdriver G so that the second clamping structure 6 of the component C and the first clamping structure 3 of the component A are embedded and connected with each other, and connecting the component C and the component A; (3) reversely rotating the driver G to separate the driver G from the component C and taking the driver G out of the driver F; (4) the second cross structure 18 of the screwdriver H and the first cross structure 17 of the component D are matched with each other, so that the screwdriver H can control the component D; (5) the screw driver H inserts the component D into the hollow structure of the component B through the hollow structure of the screw driver F, the screw driver F controls the component B not to rotate, and the screw driver H is rotated, the unique design of the utility model, namely, the two pairs of thread pitches and the thread directions of the third external thread 8 of the component D, the third internal thread 7 of the component C, the fourth external thread 9 of the component D and the second internal thread 5 of the component B are the same, so that the component D is synchronously matched with the component A and the component B; (6) and tightening the component D, wherein the component A and the component B are in a locking state.

The fifth step: implanting a plurality of combined pressurizing and locking screws according to the same flow according to the requirement, performing fluoroscopy again to confirm that the fracture reduction and the internal fixation position are good, flushing the wound surface, stopping bleeding exactly, and then suturing to the skin in sequence;

and a sixth step: the relevant size in the operation can be continuously adjusted according to different disease conditions;

the above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A combination compression locking screw comprising a component a and a component B, characterized in that: a component C and a component D are also provided,

the assembly A is provided with a first external thread 1 and a second external thread 2, and a first clamping structure 3 is arranged in one end, close to the second external thread 2, of the assembly A;

the component B is a hollow cylindrical structure internally provided with a first internal thread 4 and a second internal thread 5, and the first internal thread 4 is matched with the second external thread 2 of the component A so as to realize the connection of the component A and the component B; the end part of the component B close to the second internal thread 5 is provided with a pressurizing structure;

the component C comprises a second clamping structure 6 arranged at one end and a hollow structure provided with a third internal thread 7 at the other end, and the second clamping structure 6 is matched with the first clamping structure 3 of the component A so as to realize the connection of the component A and the component C;

the subassembly D includes third external screw thread 8 and fourth external screw thread 9, third external screw thread 8 with the third internal thread 7 phase-match of subassembly C to realize being connected of subassembly C and subassembly D, fourth external screw thread 9 with the second internal thread 5 phase-match of subassembly B, in order to realize being connected of subassembly B and subassembly D.

2. The combination compression lock screw of claim 1, wherein: the second external thread 2 of the component A and the first internal thread 4 of the component B are a first pair of threads, the third internal thread 7 of the component C and the third external thread 8 of the component D are a second pair of threads, and the second internal thread 5 of the component B and the fourth external thread 9 of the component D are a third pair of threads; the first pair of threads and the second and third pairs of threads have different thread pitch and/or thread rotation direction, and the second and third pairs of threads have the same thread pitch and thread rotation direction.

3. The combination compression lock screw of claim 1, wherein: the pressurizing structure of the component B is an expanded hemispherical structure arranged at the end part, close to the second internal thread 5, of the component B, the cross section area of the pressurizing structure of the component B is larger than that of the main body part of the component B, a fifth external thread 10 is arranged on the surface of the pressurizing structure of the component B, and the fifth external thread 10 can be screwed into a bone or a matched bone fracture plate.

4. The combination compression lock screw of claim 1, wherein: the first clamping structure 3 of the component A is a hollow structure, and the first clamping structure 3 is a hollow prismatic structure, a hollow cross structure, a hollow straight structure or a hollow polygonal star structure; the second clamping structure 6 of the component C is a prismatic structure, a cross structure, a straight structure or a polygonal star structure matched with the first clamping structure 3 of the component A.

5. The combination compression lock screw of claim 1, wherein: be provided with first scale mark 11 between subassembly A's first external screw thread 1 and the second external screw thread 2, first scale mark 11 is used for instructing subassembly B assembles the degree of depth on the subassembly A, promptly when subassembly B first internal screw thread 4 matches each other with subassembly A second external screw thread 2, subassembly B is close to the terminal of subassembly A one side with first scale mark 11 flushes.

6. The combination compression lock screw of claim 1, wherein: the outer surface of the component B is provided with a second graduation line 12, and the second graduation line 12 is used for indicating the depth of the component B implanted into the bone, namely when the assembled component A and the assembled component B are implanted into the bone, the second graduation line 12 on the component B is flush with the surface of the bone.

7. The combination compression lock screw of claim 1, wherein: the surface of the component A and/or the component B is formed with an uneven structure which can be filled with a medicament beneficial to bone healing.

8. The combination compression lock screw of claim 1, wherein: the surface of the component A and/or the component B is subjected to sand blasting or porous and hydroxyapatite protruding treatment to form micropores.

9. A driver for use with the combination compression lock screw of any one of claims 1 to 8, wherein: a driver E, a driver F, a driver G and a driver H are arranged;

one end of the screwdriver E comprises a third clamping structure 13 matched with the first clamping structure 3 of the component A, so that the screwdriver E can operate and control the component A;

one end of the screwdriver F is a second hollow cross structure 15, and the second hollow cross structure 15 is matched with a first hollow cross structure 14 arranged in a pressurizing structure of the component B, so that the screwdriver F can operate and control the component B;

one end of the driver G comprises a sixth external thread 16 matched with the third internal thread 7 of the component C, so that the driver G can operate the component C;

one end of the screwdriver H is provided with a second cross-shaped structure 18, the second cross-shaped structure 18 is matched with a first cross-shaped structure 17 arranged at one end of the component D close to the fourth external thread 9, and therefore the screwdriver H can operate the component D;

10. A driver as defined in claim 9 wherein: the screwdriver E and the screwdriver F are respectively provided with a first locking structure 19 and a second locking structure 20 which are matched with each other, the second locking structure 20 on the screwdriver F is pushed, and the locking between the screwdriver E and the screwdriver F is completed; the second locking structure 20 on the driver F is pushed reversely to release the locking between the driver E and the driver F.