CN115517752A

CN115517752A - Implanted bone screw and knotting-free bone screw system

Info

Publication number: CN115517752A
Application number: CN202211157639.1A
Authority: CN
Inventors: 董文兴
Original assignee: Beijing Tianxing Bomaidi Medical Equipment Co ltd
Current assignee: Beijing Tianxing Medical Co ltd
Priority date: 2022-07-09
Filing date: 2022-07-09
Publication date: 2022-12-27
Anticipated expiration: 2042-07-09
Also published as: CN114848123A; CN114848123B; CN115517752B; CN115607251A

Abstract

The application discloses an implanted bone screw and knotting-free bone screw system, aiming at solving the problems that the guiding precision is poor, the fracture part is often damaged by soft tissues, and the existing bone screw cannot be fixed and repaired; the implanted bone screw comprises a hollow main body and a core rod arranged in the hollow main body; the hollow body comprises a first chamber and a second chamber which are communicated; the core rod comprises a first acting section matched with the first cavity and a second acting section matched with the second cavity; the hollow main body is arranged, implantation can be carried out along the positioning needle, the damaged part can be accurately fixed, the guiding precision is high, and damage to the fracture area is effectively reduced; the application can provide pressure between different areas of the bone, so that the areas are easy to heal; the hollow main body has good plastic performance and semi-transmission performance, does not need to be detached during clinical examination and diagnosis, and obviously improves the visualization of bones and joint spaces.

Description

Implanted bone screw and knotting-free bone-knitting system

Technical Field

The application relates to the technical field of medical equipment, in particular to an implanted bone screw and knotting-free bone screw system.

Background

In a medical department of traumatology, patients with common fracture, cartilage avulsion of fracture and soft tissue avulsion of fracture have open operation or operation by means of an X-ray instrument, and the common techniques for treating the bone injury comprise an implanted bone screw (made of titanium alloy) and a bone fracture plate (made of titanium alloy). Common techniques for treating soft tissue injuries include suture anchors and interface screws.

The following problems mainly exist at present: the open operation has large injury to the wound of the lesion, the infection and inflammation probability is increased, the later recovery period is prolonged, and the body surface scar is not easy to remove after recovery, thereby affecting the beautiful appearance. The implanted bone screw (made of titanium alloy) and bone plate (made of titanium alloy) are used for treating fracture patients, the implanted bone screw and the implanted bone plate are arranged between the bone surface and soft tissue, and the implanted bone screw and the implanted bone plate are rubbed with the soft tissue to cause inflammation or pathological changes. The implanted bone screw and the implanted bone plate are taken out after the injury is recovered, if the implanted bone screw and the implanted bone plate are not taken out, the bone rod area is protected from bearing the gravity or external force of the human body and the bone plate can lose the function. Most of patients with bone and cartilage, bone and soft tissue injuries in the fracture process need to be treated by the implanted bone screws, the bone fracture plate, the threaded anchors and the interface screws, and the cost of a plurality of types of implanted products is high. When the X-ray assisted surgery is used, firstly, a tiny positioning needle is used for roughly positioning according to the experience of a doctor, when the positioning can be implanted by means of X-ray assistance, the positioning needle is withdrawn, and then the implanted bone screw is implanted.

In conclusion, the bone-knitting device disclosed at present is easy to cause secondary damage to patients due to poor guidance quality in the using process; when fixing and modifying, a plurality of products are implanted to meet the fixing requirement, the cost is high, and the pain of a patient is also aggravated.

Disclosure of Invention

Poor, the fracture department often can have soft tissue injury in order to solve the direction precision when knitting the bone, and present bone setting nail can't fix and prosthetic problem, this application provides an implanted bone screw, exempts from to tie a knot bone-knitting system.

The implantable bone screw provided by the first aspect of the application adopts the following technical scheme:

an implantable bone screw comprises a hollow main body and a core rod arranged in the hollow main body;

the hollow body comprises a first chamber and a second chamber which are communicated;

the core rod comprises a first acting section matched with the first cavity and a second acting section matched with the second cavity;

the first action section is arranged in a manner of overhanging out of the first cavity;

the second action section is arranged on one side, away from the head part of the hollow main body, of the first action section.

By adopting the technical scheme, in the using process, the hollow main body can be accurately guided and implanted in a bone marrow channel along the positioning needle, so that the peripheral injury part can be accurately fixed; after the hollow main body reaches the preset position, implanting the core rod, and providing pressure between different areas of the bone through matching the corresponding areas of the hollow main body in the core rod implanting process so as to enable the areas to be easy to heal; the hollow main body in the application does not need to be dismantled in clinical examination and diagnosis, and the visualization of bones and joint spaces is obviously improved.

Preferably, the radial dimension of the first chamber is smaller than the radial dimension of the second chamber; the longitudinal length of the first chamber is less than the longitudinal length of the second chamber;

the first action section is provided with a plurality of coaxially arranged first circular truncated cone structures, and the bottom surfaces of the first circular truncated cone structures are all arranged towards the second action section;

the second action section is a polish rod;

the outer wall of the hollow main body is provided with a first thread section and a second thread section, the length of the first thread section is greater than that of the second thread section, and the thread pitch of the first thread section is greater than that of the second thread section;

a through hole and a longitudinal groove communicated with the through hole are formed in the side wall of the second thread section; the longitudinal axis of the longitudinal groove is arranged in parallel with the longitudinal axis of the hollow body, and the depth of the longitudinal groove is smaller than the length of the through hole.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the thread section can realize the stabilization with the surrounding bone and form a gap with the surrounding bone, thereby being beneficial to the micro movement of bone healing and improving the fracture healing effect; the through hole and the longitudinal groove are arranged to form a threading structure, so that the sewing is facilitated.

the second acting section is a polish rod;

the plane of the tail end of the hollow main body is provided with a wire ring for the penetration of a suture.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the first thread section and the second thread section can realize the stabilization with surrounding bones and form a gap with the surrounding bones, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of the thread ring forms a threading structure, which is convenient for sewing.

the second acting section is a polish rod;

the outer wall of the hollow main body is provided with a double-thread section and a columnar polished rod section, and the length of the double-thread section is greater than that of the columnar polished rod section; the tail end of the columnar polished rod section is sleeved with a pressure pad, and a plurality of threading holes are formed in the pressure pad; an interface pressing cap is arranged at the end part, far away from the double-thread section, of the columnar polished rod section.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the double-thread section and the columnar polished rod section are arranged, so that not only can the stabilization with surrounding bones be realized, but also a gap can be formed with the surrounding bones, the micro movement of bone healing is facilitated, and the fracture healing effect is improved; the arrangement of a plurality of threading holes forms a threading structure, and is convenient for sewing.

Preferably, the radial dimension of the first chamber is smaller than the radial dimension of the second chamber; the longitudinal length of the first chamber is greater than the longitudinal length of the second chamber; the first chamber is a conical chamber; the interior of the second chamber has internal threads;

the first action section is of a conical polished rod structure; the second action section is a threaded rod;

the end part of the second action section, which is far away from the first action section, is provided with a driving structure, and the driving structure is provided with a plurality of wire holes;

the outer wall of the hollow main body is provided with a plurality of coaxially arranged second circular truncated cone structures, and the bottom surfaces of the second circular truncated cone structures are all arranged towards the tail of the hollow main body;

the head of the hollow main body is provided with a plurality of side wall penetrating grooves;

the head of the hollow main body is conical.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the plurality of second circular truncated cone structures can realize the stabilization with surrounding bones and form gaps with the surrounding bones, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of a plurality of threading holes forms a threading structure, and is convenient for sewing.

the second acting section is a polish rod;

the second action section is provided with a middle threading hole, and a conical wire clamping groove is formed between the middle threading hole and the tail part of the second action section;

the outer wall of the hollow main body is provided with a double-thread threaded section, a blank section and a single-thread tapered threaded section, and the length of the double-thread threaded section is greater than that of the single-thread tapered threaded section; the blank section is arranged between the double-thread threaded section and the single-thread tapered threaded section; the end part of the double-thread section far away from the blank section is a conical screw head.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the double-line thread section, the blank section and the single-line conical thread section can realize the stabilization with the surrounding bone and form a gap with the surrounding bone, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the setting of middle section through wires hole realizes fixing the suture in the core bar installation, and the steadiness is high, is convenient for sew up.

the first action section and the second action section are both hexagonal polished rods;

the end part of the first action section is provided with a U-shaped groove;

the second action section is provided with a suture hole;

the outer wall of the hollow main body is provided with a double-thread section, a blank section and a single-thread conical thread section, and the length of the double-thread section is greater than that of the single-thread conical thread section; the blank section is arranged between the double-thread threaded section and the single-thread tapered threaded section; the end part of the double-thread section far away from the blank section is a conical screw head;

the side wall of the single-thread conical thread section is provided with a thread hole;

a wire releasing groove is formed between the side wall of the single-wire conical thread section and the inner cavity, and the wire releasing groove is communicated with the wire threading hole.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the double-line thread section, the blank section and the single-line conical thread section can realize the stabilization with the surrounding bone and form a gap with the surrounding bone, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the setting of U type groove, suture hole and through wires hole realizes fixing the suture in the core bar installation, and the steadiness is high, is convenient for sew up.

the second action section is a polish rod;

the second action section is provided with a middle threading hole;

the side wall of the single-thread conical threaded section is provided with a threading hole;

a wire placing groove is formed between the side wall of the single-wire conical thread section and the inner cavity, and the wire placing groove is communicated with the wire passing hole.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the double-line thread section, the blank section and the single-line conical thread section can realize the stabilization with the surrounding bone and form a gap with the surrounding bone, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of the plurality of first circular truncated cone structures realizes the stable connection of the hollow main body; the setting of U type groove, suture hole and through wires hole realizes the fixed to the suture in the installation of core bar, and the steadiness is high, is convenient for sew up.

Preferably, the hollow body comprises a first structure and a second structure, the end of the first structure having an annular projection; the end part of the second structure is provided with an annular groove clamped with the annular protrusion so as to be connected with the first structure; the first structure has a degree of freedom to rotate along its longitudinal axis or the second structure has a degree of freedom to rotate along its longitudinal axis;

the outer wall of the first structure is provided with external threads, and the end part of the first structure far away from the second structure is arranged in a conical shape;

the second structure comprises a polished rod section and a threaded section, and the threaded section is arranged on one side, far away from the first structure, of the polished rod section; the thread pitch of the thread section is smaller than that of the external thread; a threading through hole is formed in the thread section;

the first structure is internally provided with a first channel section and a second channel section; the second structure has a third channel segment inside; the first channel section is the first cavity, and the second channel section and the third channel section form the second cavity;

the radial dimension of the first channel segment is less than the radial dimension of the second channel segment;

the radial size of the second channel section is consistent with that of the third channel section;

the second action section is a polish rod.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the external thread, the polished rod section and the thread section on the outer side of the first structure can realize the stabilization with surrounding bones and form a gap with the surrounding bones, thus being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of the plurality of first circular truncated cone structures and the polished rod realizes the stable connection of the hollow main body; the through holes are arranged, so that threading is facilitated, and the sewing effect is improved.

The knotting-free bone-knitting system provided by the second aspect of the application adopts the following technical scheme:

the knotting-free bone-knitting system comprises a plurality of implanted bone-knitting screws, wherein the implanted bone-knitting screws are connected with one another through sutures to form a knotting-free traction anchoring surface.

By adopting the technical scheme, knotting-free bone setting is realized, and anchoring pulling force is formed between the bone setting plates to ensure that the bone setting plates are more firmly fixed.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in the application, the implanted bone screw is not taken out after being implanted into a body, so that the friction with soft tissues is reduced, and the occurrence probability of inflammation or pathological changes is greatly reduced.

2. In the implantable bone screw disclosed by the application, the hollow main body can be implanted along the positioning needle, so that the damaged part can be accurately fixed, the guiding precision is high, and meanwhile, the damage to soft tissues on the peripheral side is greatly reduced; the core rod is matched with the hollow main body to provide pressure between different areas of the bone, so that the areas are easy to heal; the adopted polyetheretherketone or absorbable material has good plastic capability and radiopacity, does not need to be dismantled in clinical examination and diagnosis, and obviously improves the visualization of bones and joint spaces.

3. The scheme disclosed in the application can solve trauma orthopedics and sports injury integrated patients.

4. The present application is made from PEEK and titanium alloy materials, and the radio-translucent nature of the hollow body provides significant clinical advantages over traditional metal implants by significantly improving visualization of bone and joint space. The surgeon can better assess post-operative healing by "looking through" the implant and looking down on the bone structure on an X-ray film.

5. Simple structure, low cost and convenient popularization.

6. The scheme disclosed in the application is a structure with a thread, so that the thread can be conveniently threaded and the fracture area can be sutured.

7. The knotting-free bone-knitting system can realize tensioning and pressurizing of two fracture surfaces of a fractured bone, forms anchoring traction force between the two fracture surfaces to enable the fractured bone to be more firm to fix, is beneficial to healing of the bone, and effectively reduces pain of patients.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of an implantable bone screw according to the present application.

Fig. 2 is a schematic cross-sectional view of the hollow body of fig. 1.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 4 is a schematic structural view of a second embodiment of the hollow body in the implantable bone screw of fig. 1.

Fig. 5 is a schematic structural view of a third embodiment of the hollow body in the implantable bone screw of fig. 1.

Fig. 6 is a schematic structural view of a fourth embodiment of a hollow body in the implantable bone screw of fig. 1.

Fig. 7 is a schematic cross-sectional view of fig. 6.

Fig. 8 is a schematic structural view of a fifth embodiment of a hollow body in the implantable bone screw of fig. 1.

Fig. 9 is a schematic structural view of a sixth embodiment of an implantable bone screw according to the present application.

Fig. 10 is a schematic cross-sectional view of the hollow body of fig. 9.

Fig. 11 is a schematic structural view of a seventh embodiment of an implantable bone screw according to the present application.

Fig. 12 is a schematic structural view of an eighth embodiment of an implantable bone screw according to the present application.

Fig. 13 is a schematic structural view of a ninth embodiment of an implantable bone screw according to the present application.

Fig. 14 is a schematic structural view of a tenth embodiment of an implantable bone screw according to the present application.

Fig. 15 is a schematic structural view of an eleventh embodiment of an implantable bone screw according to the present application.

Fig. 16 is a schematic structural view of a twelfth embodiment of an implantable bone screw according to the present application.

Fig. 17 is a schematic structural view of a thirteenth embodiment of the hollow body in the implantable bone screw of fig. 1.

Fig. 18 is a schematic sectional view of fig. 17.

Description of the reference numerals: 100. a hollow body; 101. a first structure; 1011. an annular projection; 1012. a first channel segment; 1013. a second channel segment; 102. a second structure; 1021. an annular groove; 1022. a third channel segment; 110. a first chamber; 120. a second chamber; 131. a first thread segment; 132. a second thread segment; 1321. a through hole; 1322. a longitudinal groove; 1323. a counter bore; 140. a wire loop; 151. a double-threaded section; 152. a cylindrical polished rod section; 153. a pressure pad; 154. an interface pressure cap; 161. a double-threaded segment; 162. a blank section; 163. a single tapered threaded section; 200. a core bar; 210. a first action segment; 211. a U-shaped groove; 212. a boss structure; 220. a second action segment; 221. a middle section threading hole; 222. a conical wire clamping groove; 230. a drive structure; 300. a first truncated cone structure; 400. a second truncated cone structure; 500. a hexagonal connector.

Detailed Description

The present application is described in further detail below with reference to fig. 1-18.

The application discloses an implanted bone screw, exempt from to tie a knot bone system.

Example one

Referring to fig. 1 and 2, a first aspect of the present application discloses an implantable bone screw including a hollow body 100, the hollow body 100 having a first chamber 110 and a second chamber 120 communicating with each other inside; wherein, the hollow main body 100 is made of polymer material, preferably polyetheretherketone or absorbable material, which will not harm human body and can significantly improve the visualization of bone and joint space. The hollow body 100 provides a significant clinical advantage over conventional metal implants, and the surgeon can better assess post-operative healing by "looking through" the implant and looking down on the bone structure on an X-ray film. The adopted polyetheretherketone or absorbable material has good plastic capability and radiopacity, does not need to be dismantled in clinical examination and diagnosis, and obviously improves the visualization of bones and joint spaces.

The implanted bone screw further comprises a core rod 200 arranged inside the hollow main body 100, wherein the core rod 200 comprises a first acting section 210 matched with the first cavity 110 and a second acting section 220 matched with the second cavity 120; the first active segment 210 is disposed in overhanging relation to the first chamber 110; the second active segment 220 is disposed on a side of the first active segment 210 away from the head of the hollow body 100.

The implanted bone screw does not need to be arranged in an implanted way, namely, the bone screw is not taken out after being implanted into the body; through the implanted arrangement, the friction with soft tissues is effectively reduced, and the occurrence probability of inflammation or pathological changes is greatly reduced; particularly, the probability of infection and inflammation caused by great injury of open surgery to the wound of a lesion is effectively reduced, the later recovery period is shortened, the body surface scars after recovery are easy to remove, and the attractive appearance is not affected. Through the implantable bone screw disclosed by the application, treatment expectations such as fixation can be met, the types of implanted products are effectively reduced, the pain of patients can be reduced, and the economic burden of the patients can be relieved.

In the using process, the hollow main body can be accurately guided and implanted in a bone marrow channel along the positioning needle, so that the peripheral injury part can be accurately fixed; after the hollow main body reaches the preset position, the core rod is implanted, specifically, the first action section 210 is arranged in a matching way with the first cavity 110, and the second action section 220 is arranged in a matching way with the second cavity 120, so that the whole implanted bone screw can be accurately implanted, the core rod 200 can be accurately positioned in the hollow main body 100 through the arrangement of the corresponding cavities, pressure is provided for different areas on the peripheral side through the hollow main body 100, and a plurality of areas are easy to heal. The hollow body of the present application has good plastic capability and semi-transmission of rays, does not need to be removed in clinical examination and diagnosis, and significantly improves visualization of bone and joint space, wherein the radial dimension of the first chamber 110 is smaller than the radial dimension of the second chamber 120; the longitudinal length of the first chamber 110 is less than the longitudinal length of the second chamber 120, facilitating installation of the core pin 200 while improving stability.

The outer wall of the hollow main body 100 is provided with a first thread section 131 and a second thread section 132, the length of the first thread section 131 is greater than that of the second thread section 132, and the thread pitch of the first thread section 131 is greater than that of the second thread section 132, namely, the stroke of the far side part of the tail part is greater than that of the near side part of the head part, and the near side part is driven by the integrated far side part which provides force and pressure, so that the compression effect is improved; specifically, after the hollow body is implanted into the interior of the bone tunnel, the first threaded section may be threadedly coupled to the shaft and the second threaded section may be threadedly coupled to the damaged bone. Because the stroke of the first thread section is larger than that of the second thread section, the first thread section can apply tension to the second thread section, and under the action of the tension, the second thread section can apply pressure to the damaged bone, so that the damaged bone is tightly attached to the bone stem, and the healing of the damaged bone and the bone stem is promoted.

A through hole 1321 and a longitudinal groove 1322 communicated with the through hole 1321 are formed in the side wall of the second thread section 132; the longitudinal groove 1322 has a longitudinal axis disposed in parallel with the longitudinal axis of the hollow body 100, and the depth of the longitudinal groove 1322 is smaller than the length of the through hole 1321, facilitating the penetration of a suture.

It should be noted that the longitudinal axis of the longitudinal slot 1322 and the longitudinal axis of the hollow main body 100 may be disposed at a predetermined included angle, as long as the requirement of threading the suture thread is satisfied.

Wherein the second active segment 220 is a smooth rod in the shape of a hexagonal prism for facilitating connection with an external structure for providing a driving force.

Further referring to fig. 3, the first acting section 210 has a plurality of first circular truncated cone structures 300 coaxially disposed, bottom surfaces of the plurality of first circular truncated cone structures 300 are all disposed toward the second acting section 220, so as to be convenient for installation with the hollow main body 100, and the hollow main body is firmly fixed and is not easy to pull out.

The implementation principle of an implanted bone screw in the embodiment of the application is as follows: the embodiment can be implanted along the positioning needle, so that accurate bone-knitting guiding is realized; the arrangement of the first thread section 131 and the second thread section 132 can not only realize the stabilization with the surrounding bone, but also form a gap with the surrounding bone, thus being beneficial to the micro movement of bone healing and improving the fracture healing effect; the through hole 1321 and the longitudinal groove 1322 form a threading structure, thereby facilitating the sewing.

In a preferred embodiment of the present application, the through holes 1321 are provided in two, and the two through holes 1321 are symmetrically provided; the longitudinal slots 1322 are adapted to receive sutures extending through the through holes 1321, which not only secure the sutures, but also prevent damage to the bone surrounding the bone within the established bone tunnel.

Example two

Referring to fig. 4, the core bar 200 provided inside the hollow body 100 in this embodiment is structurally identical to the core bar 200 provided in the first embodiment, and thus only the hollow body 100 in this embodiment will be described in detail.

The outer wall of the hollow main body 100 is provided with a first threaded section 131 and a second threaded section 132, the length of the first threaded section 131 is greater than that of the second threaded section 132, and the thread pitch of the first threaded section 131 is greater than that of the second threaded section 132; the plane of the tail end of the hollow main body 100 is provided with a wire ring 140 for the penetration of a suture, and the embodiment can realize accurate bone-knitting guiding; the arrangement of the first thread section 131 and the second thread section 132 can not only realize the stabilization with the surrounding bone, but also form a gap with the surrounding bone, thereby being beneficial to the micro movement of bone healing and improving the fracture healing effect; the thread loop 140 is provided to form a threading structure for facilitating suturing.

Preferably, the wire loop 140 is provided integrally, i.e. injection molded, with the hollow body 100.

Preferably, one wire loop 140 is provided, and the wire loop 140 is a semicircular loop.

EXAMPLE III

Referring to fig. 5, in the second embodiment, different from the second embodiment, two wire loops 140 are provided, and the two wire loops 140 are symmetrically provided; it should be noted that the number of the thread loops 140 can be flexibly set according to the requirement to meet the requirement of the suture.

Example four

Referring to fig. 6 and 7, the core bar 200 provided inside the hollow body 100 in this embodiment is structurally identical to the core bar 200 provided in the first embodiment, and thus only the hollow body 100 in this embodiment will be described in detail.

The outer wall of the hollow main body 100 is provided with a first threaded section 131 and a second threaded section 132, the length of the first threaded section 131 is greater than that of the second threaded section 132, and the thread pitch of the first threaded section 131 is greater than that of the second threaded section 132; a through hole 1321 is formed in the side wall of the second thread section 132; a counter bore 1323 is formed between the side wall of the second thread section 132 and the inner cavity, the counter bore 1323 is communicated with the through hole 1321, and the through hole 1321 and the counter bore 1323 are arranged; in the use process, the suture can pass through the arrangement of the through hole 1321 and the counter bore 1323, the connection with the hollow main body 100 is ensured, and the fixing strength of the suture is improved; further, with the threading structure disclosed in the present embodiment, the suture does not generate friction against the surrounding bone when the hollow body 100 is installed, preventing secondary damage to the surrounding bone, and at the same time facilitating suturing.

EXAMPLE five

Referring to fig. 8, the core bar 200 provided inside the hollow body 100 in this embodiment is provided in conformity with the structure of the core bar 200 provided in the first embodiment, and thus only the hollow body 100 in this embodiment will be described in detail.

The outer wall of the hollow main body 100 is provided with a double-thread section 151 and a columnar polished rod section 152, and the length of the double-thread section 151 is larger than that of the columnar polished rod section 152; the tail end of the columnar polished rod section 152 is sleeved with a pressure pad 153, and a plurality of threading holes are formed in the pressure pad 153; the end of the cylindrical polished rod segment 152 remote from the double-threaded segment 151 is provided with an interface pressure cap 154; the implementation can realize accurate bone-knitting guiding; the dual-thread section 151 and the columnar polished rod section 152 are arranged, so that the gasket acts on the surface of a cortical bone and the surface of a soft tissue, the fracture is pressed and fixed, the surface of the soft tissue is pressed and fixed, the micro-movement of bone healing is facilitated, and the fracture healing effect is improved; the arrangement of a plurality of threading holes forms a threading structure, so that the soft tissue can be sutured conveniently for fixing and resetting.

EXAMPLE six

Referring to fig. 9 and 10, in particular, the radial dimension of the first chamber 110 is smaller than the radial dimension of the second chamber 120; the longitudinal length of the first chamber 110 is greater than the longitudinal length of the second chamber 120; the first chamber 110 is a conical chamber; the interior of the second chamber 120 is internally threaded, specifically, with a threaded section that mates with the second reaction section 220.

Wherein, the first action section 210 is a tapered polish rod structure, which is convenient for installation; the second active segment 220 is a threaded rod, ensuring fixation with the hollow body 100.

The end of the second action section 220 away from the first action section 210 is provided with a driving structure 230, and the driving structure 230 is provided with a plurality of thread holes to perform secondary fixing and guiding functions on the threaded thread.

The outer wall of hollow main part 100 has a plurality of coaxial second round platform structures 400 that set up, and the bottom surface of a plurality of second round platform structures 400 all sets up towards the afterbody of hollow main part 100, not only is convenient for wear to establish in the bone tunnel, can form reverse conflict with surrounding bone again, prevents reverse pine from taking off.

The head of the hollow main body 100 is provided with a plurality of side wall through grooves for facilitating the threading of the suture.

The head of the hollow main body 100 is conical, so that the introduction and the guide penetration are convenient, and the accurate guidance of the bone fracture can be realized; the arrangement of the plurality of second circular truncated cone structures 400 can not only realize the stabilization with the surrounding bone, but also form a gap with the surrounding bone, thereby facilitating the micro-movement of bone healing and improving the fracture healing effect; the arrangement of a plurality of threading holes forms a threading structure, and is convenient for sewing.

Preferably, a plurality of side walls are arranged in an array relative to the longitudinal axis of the hollow body 100 through the slots.

EXAMPLE seven

Referring to fig. 11, in particular, the radial dimension of the first chamber 110 is smaller than the radial dimension of the second chamber 120; the longitudinal length of the first chamber 110 is less than the longitudinal length of the second chamber 120.

The head of the first active segment 210 is tapered; the outer side of the first acting section 210 is provided with a plurality of first circular truncated cone structures 300 which are coaxially arranged, the bottom surfaces of the first circular truncated cone structures 300 are all arranged towards the second acting section 220, so that the hollow main body 100 can be conveniently installed, the fixing is firm, the pulling-out is not easy, and the reverse looseness is prevented.

The second active segment 220 is a polish rod; the second acting section 220 is provided with a middle threading hole 221, and a conical wire clamping groove 222 is formed between the middle threading hole 221 and the tail of the second acting section 220, so that a suture can be conveniently threaded.

The end of the second acting section 220 away from the first acting section 210 is provided with a countersunk threaded hole for connecting with the hexagonal connector 500, so as to control the connection of the core rod 200 and the hollow main body 100.

Further, the tail of the second acting section 220 is a conical structure, and a chamfered structure is further arranged outside the second acting section, so that the compression effect on the hollow main body 100 is improved.

The outer wall of the hollow main body 100 is provided with a double-thread threaded section 161, a blank section 162 and a single-thread tapered threaded section 163, and the length of the double-thread threaded section 161 is greater than that of the single-thread tapered threaded section 163; the blank segment 162 is disposed between the double-threaded segment 161 and the single-threaded tapered threaded segment 163; the end part of the double-thread section 161 far away from the blank section 162 is a conical screw head, so that accurate bone setting guiding can be realized; the double-line thread section 161, the blank section 162 and the single-line conical thread section 163 are arranged, so that not only can the stabilization of the bone around be realized, but also a gap can be formed between the bone and the surrounding bone, the micro-movement of bone healing is facilitated, and the fracture healing effect is improved; the arrangement of middle section threading hole 221 realizes fixing of suture in the installation of core bar 200, and the steadiness is high, is convenient for sew up.

Preferably, the core rod 200 is made of titanium alloy material, so as to improve the bearing strength.

Example eight

Referring to fig. 12, this embodiment is configured in the same manner as the hollow body 100 of the seventh embodiment, and only the core bar 200 will be described in detail below.

The second active segment 220 is a polish rod; the second action section 220 is provided with a middle threading hole 221, and a conical wire clamping groove 222 is formed between the middle threading hole 221 and the tail of the second action section 220, so that a suture can be conveniently threaded; the tail of the second active segment 220 is in a hexagonal prism shape.

Example nine

Referring to fig. 13, the outer wall of the hollow main body 100 is provided with a threaded section and a blank section 162, and the blank section 162 is provided at the tail of the threaded section; the head of the thread section is arranged in a conical shape.

The second active segment 220 is a polish rod; the second action section 220 is provided with a middle threading hole 221, and a conical wire clamping groove 222 is formed between the middle threading hole 221 and the tail of the second action section 220, so that a suture can be conveniently threaded; the tail of the second acting section 220 is a hexagonal prism, and the outer side of the hexagonal prism is provided with a chamfering structure.

Example ten

Referring to fig. 14, in particular, the outer wall of the hollow body 100 is provided with a double-thread threaded section 161, a blank section 162, and a single-thread tapered threaded section 163, the length of the double-thread threaded section 161 being greater than the length of the single-thread tapered threaded section 163; the blank segment 162 is disposed between the double-threaded segment 161 and the single-threaded tapered threaded segment 163; the end of the double thread segment 161 away from the blank segment 162 is a conical screw head; the side wall of the single-thread tapered thread section 163 is provided with a thread hole.

The radial dimension of the first chamber 110 is smaller than the radial dimension of the second chamber 120; the longitudinal length of the first chamber 110 is less than the longitudinal length of the second chamber 120.

The first action section 210 and the second action section 220 are both hexagonal polish rods; wherein, the end of the first action section 210 is provided with a U-shaped groove 211; the second action section 220 is provided with a suture hole; the front end of the first active segment 210 is conically configured.

The embodiment can realize accurate bone-knitting guiding; the arrangement of the double-thread threaded section 161, the blank section 162 and the single-thread tapered threaded section 163 can realize the stabilization with surrounding bones, can form a gap with the surrounding bones, is beneficial to the micro movement of bone healing and improves the fracture healing effect; the U-shaped groove 211, the suture holes and the threading holes are arranged, so that the suture can be fixed in the installation of the core rod 200, the stability is high, and the sewing is facilitated.

Further, a thread releasing groove can be further formed between the side wall of the single-thread conical thread section 163 and the inner cavity, the thread releasing groove is communicated with the thread releasing hole, the thread is hidden inside the hollow main body 100 and is not exposed to the outside, and secondary damage to surrounding bones is prevented.

Further, the core bar 200 is made of titanium alloy material, so as to ensure the bearing strength.

EXAMPLE eleven

Referring to fig. 15, in particular, the outer wall of the hollow body 100 is provided with a double-thread threaded section 161, a blank section 162, and a single-thread tapered threaded section 163, the length of the double-thread threaded section 161 being greater than the length of the single-thread tapered threaded section 163; the blank segment 162 is disposed between the double-threaded segment 161 and the single-threaded tapered threaded segment 163; the end part of the double-thread section 161 far away from the blank section 162 is a conical screw head; the side wall of the single-thread conical thread section 163 is provided with a thread hole; a wire arrangement groove is formed between the side wall of the single-wire conical thread section 163 and the inner cavity, and the wire arrangement groove is communicated with the wire through hole.

The first action section 210 is provided with a plurality of coaxially arranged first circular truncated cone structures 300, and the bottom surfaces of the plurality of first circular truncated cone structures 300 are all arranged towards the second action section 220; the second active segment 220 is a tapered polish rod; the second action section 220 is provided with a middle threading hole 221 and is penetrated with the suture.

The embodiment can realize accurate bone-knitting guiding; the arrangement of the double-thread threaded section 161, the blank section 162 and the single-thread tapered threaded section 163 can realize the stabilization with surrounding bones, can form a gap with the surrounding bones, is beneficial to the micro movement of bone healing and improves the fracture healing effect; the arrangement of the plurality of first truncated cone structures 300 realizes the stable connection to the hollow main body 100; the U-shaped groove 211, the suture holes and the threading holes are arranged, so that the suture can be fixed in the installation of the core bar 200, the stability is high, and the suture is convenient.

EXAMPLE twelve

Referring to fig. 16, in particular, the radial dimension of the first chamber 110 is smaller than the radial dimension of the second chamber 120; the longitudinal length of the first chamber 110 is less than the longitudinal length of the second chamber 120.

The first active segment 210 has a plurality of coaxially disposed boss structures 212.

The second action section 220 is a hexagonal polish rod; the second action section 220 is provided with a middle threading hole 221, and a conical wire clamping groove 222 is formed between the middle threading hole 221 and the tail end of the second action section 220.

The outer wall of the hollow main body 100 is provided with a double-thread threaded section 161, a blank section 162 and a single-thread tapered threaded section 163, and the length of the double-thread threaded section 161 is greater than that of the single-thread tapered threaded section 163; the blank segment 162 is disposed between the double-threaded segment 161 and the single-threaded tapered threaded segment 163; the end of the double thread segment 161 remote from the blank segment 162 is a conical thread head.

Furthermore, the side wall of the single-thread conical thread section 163 can be provided with a threading hole; a wire laying groove is formed between the side wall of the single-wire conical thread section 163 and the inner cavity and communicated with the wire threading hole.

The embodiment can realize accurate bone setting guiding; the double-line thread section 161, the blank section 162 and the single-line conical thread section 163 are arranged, so that not only can the stabilization of the bone around be realized, but also a gap can be formed between the bone and the surrounding bone, the micro-movement of bone healing is facilitated, and the fracture healing effect is improved; the boss structure 212 and the hexagonal polished rod are arranged to realize stable connection to the hollow main body 100; the U-shaped groove 211, the suture holes and the threading holes are arranged, so that the suture can be fixed in the installation of the core bar 200, the stability is high, and the suture is convenient.

EXAMPLE thirteen

Referring to fig. 17 and 18, in particular, the hollow body 100 comprises a first structure 101 and a second structure 102, the end of the first structure 101 having an annular projection 1011; the end of the second structure 102 has an annular groove 1021 engaged with the annular protrusion 1011 to connect with the first structure 101; the first structure 101 has the freedom to rotate along its longitudinal axis or the second structure 102 has the freedom to rotate along its longitudinal axis, i.e. the first structure 101 and the second structure 102 can be turned but not separated.

The outer wall of the first structure 101 has an external thread and the end of the first structure 101 remote from the second structure 102 is conically arranged.

The second structure 102 comprises a polished rod section and a threaded section, and the threaded section is arranged on one side, far away from the first structure 101, of the polished rod section; the thread pitch of the thread section is smaller than that of the external thread. The interior of the first structure 101 has a first channel section 1012 and a second channel section 1013; the interior of the second structure 102 has a third channel segment 1022; the first channel section 1012 is the first chamber 110, and the second channel section 1013 and the third channel section 1022 form the second chamber 120.

Preferably, the radial dimension of the first channel section 1012 is smaller than the radial dimension of the second channel section 1013;

preferably, the radial dimension of the second channel segment 1013 is arranged in correspondence with the radial dimension of the third channel segment 1022;

preferably, the first acting section 210 has a plurality of coaxially arranged circular truncated cone structures, and bottom surfaces of the plurality of circular truncated cone structures are all arranged toward the second acting section 220.

The second active segment 220 is a polished rod.

The embodiment can realize accurate bone setting guiding; the arrangement of the external thread, the polished rod section and the thread section on the outer side of the first structure 101 can realize the stabilization with surrounding bones and form a gap with the surrounding bones, thus being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of the plurality of circular truncated cone structures and the polish rod realizes the stable connection to the hollow main body 100; the through holes are arranged, so that threading is facilitated, and the sewing effect is improved.

Preferably, the length of the polished rod segment is greater than the length of the threaded segment.

Preferably, the length of the thread segments is less than the length of the external threads.

When the bone fracture setting operation is performed, a driving tool is inserted into the front end part of the screw to implant, the driving tool needs to be implanted into a position 3mm to 6mm below bone cortex when the bone fracture setting operation is performed, then the driving tool is pulled out of the rear end part of the screw to reversely rotate 3mm to 6mm, and the rear end of the screw is withdrawn to drive the front end of the screw to move backwards so as to pressurize a fracture part.

In the application, the implanted bone screw is not taken out after being implanted into a body, so that the friction with soft tissues is reduced, and the occurrence probability of inflammation or pathological changes is greatly reduced.

According to the scheme disclosed by the application, the hollow main body 100 can be implanted along the positioning needle, the guiding precision is high, and the stabilizing effect is high.

Further, in the present application, the material of the core rod 200 may be any one of polyetheretherketone, HA, carbon fiber, or titanium alloy.

Further, the hollow body 100 in the present application is a see-through interface screw.

Specifically, the hollow body 100 may be based on an inner core of titanium alloy, with an outer layer of PEEK over which the lower titanium loading is enhanced, while maintaining strength and providing clear visibility of the bone due to the radiolucency of PEEK. Self-tapping, self-drilling, the cannulated screw system accepts a larger diameter kirschner wire and has enhanced self-tapping, self-drilling cutting screw shearing, which effectively limits the kirschner wire from bending and reduces the displacement of fracture fragments, thereby allowing the surgeon to implant with ease.

When in use, firstly, the fracture type of the injury is determined, and a corresponding bone-knitting interface screw is selected to fix the injury; the bone is seen through by an X-ray machine to find out the position of the injury, a thinner metal positioning needle is used for drilling into the backbone, and then the X-ray machine is used for confirming whether the positioning needle is properly fixed; after the positioning needle is confirmed to be in a proper position, a tunnel is established on the bone rod along the positioning needle by utilizing a hollow open-circuit tool; after the tunnel is established, a special tool implantation tool is used for implanting the bone-knitting hollow interface screw along the positioning pin, namely the hollow main body 100 of the corresponding type in the application; after implantation, the tail end carries a suture and soft tissue suturing or re-anchoring with an anchor at the distal end of the shaft.

The scheme disclosed in the application can solve trauma orthopedics and sports injury integrated patients.

The radiolucent nature of the hollow body 100, made of PEEK and titanium alloy materials, provides significant clinical advantages over conventional metal implants by significantly improving visualization of the bone and joint space. The surgeon can better assess post-operative healing by "looking through" the implant and looking down on the bone structure on an X-ray film.

Furthermore, the design of the head tip of the implanted bone screw is simple and easy to implant, and the pre-drilling requirement is avoided.

Or, the head of implanted bone screw in this application is circular arc design to reduce the sharp thorn of edge of implanted bone screw head, reduce the irritation and the damage to the soft tissue.

Further, the sutures in the present application are preformed high strength sutures.

It should be noted that, the hollow main body 100 in the present application is used as a bone interface screw, has a certain load-bearing strength, and is convenient to screw in, and the screw has a stronger fixing effect in the bone tunnel due to the back-off effect generated by the thread of the thread section.

The second aspect of this application discloses a bone-knitting system exempts from to tie a knot, and this system includes a plurality of implanted bone-knitting screw, it is a plurality of through suture interconnect between the implanted bone-knitting screw, form and exempt from to tie a knot tractive anchor face, realize exempting from to tie a knot the coaptation, form the anchor tractive force each other and make it fixed more firm.

The scheme disclosed by the application can realize tensioning and pressurizing of two fracture surfaces of the fractured bone, promote the healing of the bone, effectively relieve the pain of a patient and solve the problem of trauma orthopedics and sports injury integrated patients.

Further, a third aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than the longitudinal length of the second chamber, so that internal guidance is facilitated, and stability is improved. The outer wall of the hollow bone-knitting interface screw is provided with a first thread section and a second thread section, the length of the first thread section is larger than that of the second thread section, the thread pitch of the first thread section is larger than that of the second thread section, namely, the stroke of the far side part is larger than that of the near side part, and the near side part is driven by the integrated far side part which provides pressure, so that the compression effect is improved.

The side wall of the second thread section is provided with a through hole and a longitudinal groove communicated with the through hole; the longitudinal axis of the longitudinal groove is parallel to the longitudinal axis of the hollow bone-knitting interface screw, and the depth of the longitudinal groove is smaller than the length of the through hole, so that the suture line can be conveniently threaded.

Further, a fourth aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than that of the second chamber, so that the internal guidance is facilitated, and the stability is improved; the outer wall of the screw is provided with a first thread section and a second thread section, the length of the first thread section is greater than that of the second thread section, and the thread pitch of the first thread section is greater than that of the second thread section; the plane of the tail end of the bone fracture plate is provided with a wire ring for the penetration of a suture line so as to realize accurate bone fracture guiding; the arrangement of the first thread section and the second thread section can realize the stabilization with surrounding bones and form a gap with the surrounding bones, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of the thread ring forms a threading structure, which is convenient for sewing.

Further, a fifth aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than that of the second chamber, so that internal guidance is facilitated, and stability is improved; the outer wall of the screw is provided with a first thread section and a second thread section, the length of the first thread section is greater than that of the second thread section, and the thread pitch of the first thread section is greater than that of the second thread section; a through hole is formed in the side wall of the second thread section; a counter bore is formed between the side wall of the second thread section and the inner cavity and is communicated with the through hole, and a threading structure is formed by the through hole and the counter bore, so that the fixing strength of a thread is improved; in addition, through the threading structure disclosed by the embodiment, when the hollow bone-knitting interface screw is installed, the suture does not generate friction on the surrounding bone, so that the secondary damage to the surrounding bone is prevented, and meanwhile, the suture is convenient.

Further, a sixth aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than that of the second chamber, so that internal guidance is facilitated, and stability is improved; the outer wall of the device is provided with a double-thread section and a columnar polished rod section, and the length of the double-thread section is greater than that of the columnar polished rod section; the tail end of the columnar polished rod section is sleeved with a pressure pad, and a plurality of threading holes are formed in the pressure pad; an interface pressing cap is arranged at the end part of the columnar polished rod section, which is far away from the double-thread section, and is used for being fixed with the second action section; the arrangement of the double-thread section and the columnar polished rod section realizes that the gasket acts on the surface of a cortical bone and the surface of a soft tissue, applies pressure to fix a fracture part and fixes the surface of the soft tissue, is beneficial to micro movement of bone healing and improves the healing effect of the fracture; the arrangement of a plurality of threading holes forms a threading structure, so that the soft tissue can be sutured conveniently for fixing and resetting.

Further, a seventh aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than that of the second chamber, so that internal guidance is facilitated, and stability is improved; its outer wall has the second round platform structure of a plurality of coaxial settings, and the bottom surface of a plurality of second round platform structures all sets up towards the afterbody of hollow main part, not only is convenient for wear to establish in the bone tunnel, can form reverse conflict with surrounding bone again, prevents reverse pine from taking off. The head part is provided with a plurality of side wall penetrating grooves for facilitating the penetration of the suture.

Particularly, the head part is conical, so that the introduction and the guide penetration are convenient, and the accurate guidance of the fracture setting can be realized; the arrangement of the plurality of second circular truncated cone structures can realize the stabilization with surrounding bones and form gaps with the surrounding bones, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of a plurality of threading holes forms a threading structure, and is convenient for sewing.

Further, an eighth aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than that of the second chamber, so that internal guidance is facilitated, and stability is improved; the outer wall of the double-thread tapered thread section is provided with a double-thread threaded section, a blank section and a single-thread tapered thread section, and the length of the double-thread threaded section is greater than that of the single-thread tapered thread section; the blank section is arranged between the double-thread section and the single-thread tapered thread section; the end part of the double-thread section far away from the blank section is a conical screw head; the arrangement of the double-thread section, the blank section and the single-thread conical thread section can realize the stabilization of the bone around, and can form a gap with the bone around, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An implantable bone screw, comprising: comprises a hollow main body (100) and a core rod (200) arranged in the hollow main body (100); the hollow body (100) comprises a first chamber (110) and a second chamber (120) in communication;

the core rod (200) comprises a first acting section (210) matched with the first cavity (110) and a second acting section (220) matched with the second cavity (120);

the first active segment (210) is arranged to overhang the first chamber (110); the first action section (210) is provided with a plurality of coaxially arranged first circular truncated cone structures (300), and the bottom surfaces of the first circular truncated cone structures (300) are all arranged towards the second action section (220);

the second acting section (220) is arranged on one side of the first acting section (210) far away from the head part of the hollow main body (100);

the hollow main body (100) comprises a first structure (101) and a second structure (102) which are detachably arranged; the first structure (101) has internally a first channel section (1012) and a second channel section (1013); -the second structure (102) has a third channel segment (1022) inside; the first channel segment (1012) being the first chamber (110), the second channel segment (1013) and the third channel segment (1022) constituting the second chamber (120);

under the working state, the implanted bone screw is arranged in an embedded mode and is not taken out after being implanted into the body.

2. The implantable bone screw of claim 1, wherein: the end of the first structure (101) is provided with an annular bulge (1011); the end part of the second structure (102) is provided with an annular groove (1021) which is clamped with the annular protrusion (1011) so as to be connected with the first structure (101); the first structure (101) or the second structure (102) has a degree of freedom of rotation along its own longitudinal axis;

the outer wall of the first structure (101) is provided with external threads, and the end part of the first structure (101) far away from the second structure (102) is arranged in a conical shape;

the second structure (102) comprises a polished rod section and a threaded section, and the threaded section is arranged on one side, far away from the first structure (101), of the polished rod section; the thread pitch of the thread section is smaller than that of the external thread; and a threading through hole is formed in the thread section.

3. The implantable bone screw of claim 2, wherein: the length of the polished rod section is greater than that of the threaded section.

4. The implantable bone screw according to claim 2, wherein: the length of the threaded section is less than the length of the external thread.

5. The implantable bone screw of claim 1, wherein: a radial dimension of the first channel section (1012) is smaller than a radial dimension of the second channel section (1013);

the radial dimension of the second channel segment (1013) is arranged in correspondence with the radial dimension of the third channel segment (1022).

6. The implantable bone screw of claim 1, wherein: the second active segment (220) is a polish rod.

7. The implantable bone screw of claim 1, wherein: the core rod (200) is made of any one of polyether ether ketone, HA, carbon fiber or titanium alloy.

8. The implantable bone screw of claim 1, wherein: the hollow body (100) is a see-through interface screw.

9. A knotting-free bone-knitting system is characterized in that: the system comprises a plurality of implanted bone screws as claimed in any one of claims 1 to 8, wherein the implanted bone screws are connected with each other by suture to form a knotting-free traction anchoring surface.