CN219895890U - Internal fixation combined hollow screw device for orthopaedics - Google Patents

Abstract

The utility model relates to the technical field of orthopaedics medical equipment, in particular to an internal fixation combined hollow screw device for orthopaedics, wherein a first hollow screw comprises: a first screw and a first stopper; the outer wall of the first screw is provided with external threads; the first blocking piece is arranged at the end part of the first screw rod; the first hollow screw is provided with a first cavity structure; an internal thread structure, a guide hole structure I and a polygonal square hole structure I are sequentially distributed in the cavity structure I; the second cannulated screw comprises: a second screw and a second stopper; the outer wall of the second screw is provided with external threads; the second screw rod can be arranged in the first cavity structure of the first screw rod; the second blocking piece is arranged at the other end of the second screw rod; the second hollow screw is provided with a second cavity structure; and a second guide hole structure and a second polygonal square hole structure are sequentially distributed in the second cavity structure. The utility model can increase the extrusion force of the hollow screw to the bone and reduce the damage to the soft tissue of the fracture part and the operation risk.

Description

Internal fixation combined hollow screw device for orthopaedics

Technical Field

The utility model relates to the technical field of orthopaedics medical appliances, in particular to an internal fixation combined hollow screw device for orthopaedics.

Background

Fracture refers to a complete or partial fracture of the continuity of a bone structure. In fractures of limbs, ligament or tendon injuries around the fracture are often combined; in most cases the torn pieces of the fracture shift together with the ligaments or tendons to which they are attached. After the fracture block is required to be reduced through operation, the fracture block is fixed by using a hollow screw, and ligaments or tendons attached to the fracture block are also stabilized along with the fixation of the fracture block. The hollow screw in the prior art is fixed by combining the screw thread and the bone, so that the phenomenon of sliding wire or insufficient pressurizing force is easy to occur, and particularly, patients with osteoporosis are more likely to occur; not only affects the extrusion force to the bone, but also causes difficult removal of the screw and increases the operation wound; and, simultaneous pressurization of both sides of the bone cannot be achieved. In the prior art, the thickness of the screw head at the end part of the screw is thicker and has edges and corners, so that soft tissues around bones are easy to be stimulated, further the soft tissues outside the bones are damaged, the bones cannot obtain good blood supply, and the recovery of the injury is not facilitated.

Disclosure of Invention

In view of the above, the present utility model provides an orthopedic internal fixation combined cannulated screw device, which is mainly aimed at increasing the extrusion force of the cannulated screw to the bone, reducing the damage to the soft tissue of the fracture part and the risk of operation, and increasing the fixation strength, and is convenient to take out when taking out. Can be used separately or in combination according to the needs, and is simple and convenient for doctors to operate.

In order to achieve the above purpose, the present utility model mainly provides the following technical solutions:

the embodiment of the utility model provides an orthopedic internal fixation combined hollow screw device, which comprises a first hollow screw and a second hollow screw;

the first cannulated screw comprises: a first screw and a first stopper;

an external thread is arranged on the outer wall of the first screw rod;

the first baffle piece is fixedly arranged at the end part of the first screw rod;

the first hollow screw is provided with a first cavity structure; an internal thread structure, a guide hole structure I and a polygonal square hole structure I are sequentially distributed in the cavity structure I from one end of the first screw rod to the first baffle part in an extending manner; the internal thread structure, the first guide hole structure and the polygonal square hole structure are coaxially arranged;

the second cannulated screw comprises: a second screw and a second stopper;

an external thread is arranged on the outer wall of the second screw rod; the second screw rod can be arranged in a first cavity structure of the first screw rod and matched with the internal thread structure of the first cavity structure;

the second baffle piece is fixedly arranged at the other end of the second screw rod;

the second hollow screw is provided with a second cavity structure; the second cavity structure extends from one end of the second screw rod to the second blocking piece, and a second guide hole structure and a second polygonal square hole structure are sequentially distributed in the second cavity structure; the second guide hole structure and the second polygonal square hole structure are coaxially arranged.

Further, the minor diameter of the internal thread structure is larger than the diameter of the first guide hole structure;

the diameter of the inscribed circle of the polygonal square hole structure I is larger than that of the guide hole structure I.

Further, the internal thread structure and the first guide hole structure are in transition through a chamfer.

Further, the diameter of the inscribed circle of the polygonal square hole structure II is larger than that of the guide hole structure II.

Further, the outer end face of the first blocking piece is of a spherical structure;

the outer end face of the second blocking piece is of a spherical structure.

Further, the thickness of the first baffle member gradually becomes thinner when expanding from the center to the outside;

the thickness of the second baffle piece gradually thins from the center to the outside.

Further, the first hollow screw is made of an absorbable material;

the second hollow screw is made of absorbable materials.

Further, the first hollow screw is made of non-absorbable materials;

the second hollow screw is made of non-absorbable materials.

Further, the first polygonal square hole structure is an internal hexagonal structure;

and the second polygonal square hole structure is an internal hexagonal structure.

Further, the first polygonal square hole structure is a non-internal hexagonal structure;

the second polygonal square hole structure is a non-internal hexagonal structure.

By means of the technical scheme, the orthopedic internal fixation combined hollow screw device has at least the following advantages:

1. the extrusion force of the hollow screw to the bone can be increased;

2. reducing the damage to soft tissues of the fracture part and the operation risk;

3. the fixing strength is increased, so that the early weight-bearing activity of the patient is facilitated;

4. the combined hollow screw device is convenient to take out when the combined hollow screw device is required to be taken out;

5. can be used independently or in combination according to the needs, and is simple and convenient for doctors to operate;

6. reducing the perspective times in operation.

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.

Drawings

FIG. 1 is a schematic view of an orthopedic internal fixation combination cannulated screw device according to an embodiment of the present utility model;

fig. 2 is a schematic view of a first cannulated screw in an orthopedic internal fixation combined cannulated screw device according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a second cannulated screw in an orthopedic internal fixation combination cannulated screw device according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of cooperation between an orthopedic internal fixation combined hollow screw device and a guide pin according to an embodiment of the present utility model.

The figure shows:

1 is a first hollow screw, 1-1 is a first screw rod, 1-2 is a first blocking piece, 1-3 is a first hollow structure, 1-31 is an internal thread structure, 1-32 is a first guide hole structure, 1-33 is a polygonal square hole structure, 2 is a second hollow screw rod, 2-1 is a second screw rod, 2-2 is a second blocking piece, 2-3 is a second hollow structure, 2-31 is a second guide hole structure, 2-32 is a second polygonal square hole structure, and 3 is a guide pin.

Detailed Description

In order to further describe the technical means and effects adopted for achieving the preset aim of the utility model, the following detailed description refers to the specific implementation, structure, characteristics and effects according to the application of the utility model with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

As shown in fig. 1 to 4, an orthopedic internal fixation combined cannulated screw device according to an embodiment of the present utility model includes a first cannulated screw 1 and a second cannulated screw 2; the first cannulated screw 1 comprises: a first screw 1-1 and a first stopper 1-2; the outer wall of the first screw 1-1 is provided with external threads for connection with bone. The first stopper 1-2 is fixedly provided at an end of the first screw 1-1 for pressing and fixing one side of the fracture block. In this embodiment, the outer end surface of the first blocking member 1-2 is preferably spherical to reduce damage to surrounding soft tissues. It is further preferred that the thickness of the first barrier 1-2 gradually thins out from the center to expand outwards to reduce damage to surrounding soft tissue. The first hollow screw 1 is provided with a cavity structure 1-3; an internal thread structure 1-31, a guide hole structure 1-32 and a polygonal square hole structure 1-33 are sequentially distributed in the cavity structure 1-3 from one end of the first screw rod 1-1 to the first baffle piece 1-2; the internal thread structure 1-31, the guide hole structure 1-32 and the polygonal square hole structure 1-33 are coaxially arranged; the internal thread structures 1-31 are used for matching the second hollow screw 2; the guide hole structures 1-32 are used for the guide pin 3 to pass through; the polygonal square hole structures 1-33 are used for rotating the first hollow screw 1. In this embodiment, the polygonal square hole structures 1-33 are preferably in an internal hexagonal structure, so that an operator can perform a rotation operation through an internal hexagonal tool. Of course, the polygonal square hole structures 1-33 can also be non-internal hexagonal structures; the polygonal square hole structure 1-33 is positioned in the cavity structure 1-3, which is beneficial to reducing the thickness of the first baffle piece 1-2 and reducing the influence of the first baffle piece 1-2 on soft tissues.

The second cannulated screw 2 comprises: a second screw 2-1 and a second stopper 2-2; the outer wall of the second screw rod 2-1 is provided with external threads for connection with bone. The second screw rod 2-1 can be arranged in the cavity structure 1-3 of the first screw rod 1-1 and is matched with the internal thread structure 1-31 of the cavity structure 1-3; the second screw 2-1 is rotated, and the relative position with the first screw 1-1 can be adjusted. The second stopper 2-2 is fixedly provided at the other end of the second screw 2-1 for pressing and fixing the other side of the bone. In this embodiment, the outer end surface of the second blocking member 2-2 is preferably spherical to reduce damage to surrounding soft tissues. It is further preferred that the thickness of the second stop 2-2 gradually thins out from the center to expand outwards to reduce the risk of injury and surgery to surrounding soft tissue.

The second hollow screw 2 is provided with a cavity structure II 2-3; one end of a second screw rod 2-1 extends to a second baffle piece 2-2 in the cavity structure II 2-3, and a guide hole structure II 2-31 and a polygonal square hole structure II 2-32 are sequentially distributed in the cavity structure II; the second guide hole structure 2-31 and the second polygonal square hole structure 2-32 are coaxially arranged. The second guide hole structure 2-31 is used for the guide pin 3 to pass through; 2-32 of polygonal square hole structure for rotating the second hollow screw 2; in this embodiment, the polygonal square hole structures 2-32 are preferably of an internal hexagonal structure, so that an operator can perform a rotation operation through an internal hexagonal tool. Of course, the polygonal square hole structures II 2-32 can also be non-internal hexagonal structures.

The second polygonal square hole structure 2-32 is positioned in the second hollow cavity structure 2-3, so that the thickness of the second blocking piece 2-2 is reduced, and the influence of the second blocking piece 2-2 on soft tissues is reduced. When the second hollow screw 2 is matched with the first hollow screw 1, the second guide hole structures 2-31 and the first guide hole structures 1-32 are coaxially arranged.

According to the internal fixation combined hollow screw device for orthopaedics, disclosed by the embodiment of the utility model, the extrusion force of the hollow screw on bones can be increased, and the damage to soft tissues of fracture parts can be reduced.

As a preference of the above embodiment, the minor diameter of the internal thread structure 1-31 is larger than the diameter of the guide hole structure 1-32; the diameter of the inscribed circle of the polygonal square hole structures 1-33 is larger than that of the guide hole structures 1-32 so as to facilitate the guide pin 3 to pass through.

As the preference of the embodiment, the internal thread structures 1-31 and the guide hole structures 1-32 are in chamfer transition, so that the guide pin 3 is smoothly transited from the internal thread structures 1-31 to the guide hole structures 1-32, and the rapid operation is facilitated.

As a preferable example of the above embodiment, the inscribed circle diameter of the polygonal square hole structure two 2-32 is larger than the diameter of the guide hole structure two 2-31, so that the guide pin 3 can pass through, and the operation tool can conveniently rotate the second hollow screw 2 through the polygonal square hole structure two 2-32.

In this embodiment, the first cannulated screw 1 is preferably made of an absorbable material, and can be directly absorbed without re-surgical extraction, thereby reducing surgical damage. In this embodiment, the second cannulated screw 2 is preferably made of an absorbable material, and can be directly absorbed without re-surgical extraction, thereby reducing surgical damage. The absorbable material has lower strength, and when the fracture part needs larger extrusion force, the phenomenon of sliding wire easily occurs, and the operation is likely to fail; according to the internal fixation combined hollow screw device for orthopaedics, which is provided by the embodiment of the utility model, the first hollow screw 1 and the second hollow screw 2 are connected through the threads, so that the connection is reliable, the extrusion force is increased, the fixation strength is increased, and the early weight bearing activity of a patient is facilitated. The absorbable material may be an absorbable material such as polylactic acid.

The first cannulated screw 1 may also be of a non-absorbable material that may be easily removed when desired. The second cannulated screw 2 may also be of a non-absorbable material that may be easily removed when desired.

The internal fixation combined hollow screw device for orthopaedics provided by one embodiment of the utility model can be made of absorbable materials or non-absorbable materials according to requirements.

The internal fixation combined hollow screw device for orthopaedics provided by one embodiment of the utility model can be used for manufacturing screw combinations with different thicknesses and lengths according to requirements; of course, the first cannulated screw 1 or the second cannulated screw 2 may be used alone, as desired, at the fracture site.

The utility model provides an internal fixation combined hollow screw device for orthopaedics, which solves the problems of unstable screw fixation and poor pressurizing effect when cancellous bone fracture is fixed.

According to the internal fixation combined hollow screw device for orthopaedics, when the fracture with difficult fixation and exposure and great risk of surrounding important tissue injury is formed, an effective pressurizing effect can be obtained, and the strength of an internal fixation object can be increased; is beneficial to the healing of fracture as soon as possible and the exercise of the patient in the early loading activity.

According to the orthopedic internal fixation combined hollow screw device provided by the embodiment of the utility model, when the orthopedic internal fixation combined hollow screw device is required to be taken out, the guide needle 3 can guide and position the orthopedic internal fixation combined hollow screw device, so that the first hollow screw 1 and the second hollow screw 2 can be conveniently taken out, the incision of a secondary operation is reduced, the risk of damaging surrounding important tissues during the secondary operation is reduced, the operation time is shortened, bleeding is reduced, and the infection risk is reduced.

Further, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with these terms only being used to distinguish one element from another. Without departing from the scope of the exemplary embodiments. Similarly, neither element nor element two is a sequence of elements only intended to distinguish one element from another element. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Standard parts used in the utility model can be purchased from the market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of all parts adopt conventional means such as mature bolts, rivets and welding in the prior art, the machinery, the parts and the equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection modes in the prior art, so that the details are not described.

The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the present utility model in any way, but any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims (10)

1. An orthopedic internal fixation combined hollow screw device is characterized by comprising a first hollow screw and a second hollow screw;

the first cannulated screw comprises: a first screw and a first stopper;

an external thread is arranged on the outer wall of the first screw rod;

the first baffle piece is fixedly arranged at the end part of the first screw rod;

the first hollow screw is provided with a first cavity structure; an internal thread structure, a guide hole structure I and a polygonal square hole structure I are sequentially distributed in the cavity structure I from one end of the first screw rod to the first baffle part in an extending manner; the internal thread structure, the first guide hole structure and the polygonal square hole structure are coaxially arranged;

the second cannulated screw comprises: a second screw and a second stopper;

an external thread is arranged on the outer wall of the second screw rod; the second screw rod can be arranged in a first cavity structure of the first screw rod and matched with the internal thread structure of the first cavity structure;

the second baffle piece is fixedly arranged at the other end of the second screw rod;

the second hollow screw is provided with a second cavity structure; the second cavity structure extends from one end of the second screw rod to the second blocking piece, and a second guide hole structure and a second polygonal square hole structure are sequentially distributed in the second cavity structure; the second guide hole structure and the second polygonal square hole structure are coaxially arranged.

2. The orthopedic internal fixation combination cannulated screw device of claim 1, wherein,

the minor diameter of the internal thread structure is larger than the diameter of the first guide hole structure;

the diameter of the inscribed circle of the polygonal square hole structure I is larger than that of the guide hole structure I.

3. The orthopedic internal fixation combination cannulated screw device of claim 2, wherein,

the internal thread structure and the first guide hole structure are in transition through a chamfer.

4. The orthopedic internal fixation combination cannulated screw device of claim 1, wherein,

and the diameter of the inscribed circle of the polygonal square hole structure II is larger than that of the guide hole structure II.

5. The orthopedic internal fixation combination cannulated screw device of claim 1, wherein,

the outer end face of the first blocking piece is of a spherical structure;

the outer end face of the second blocking piece is of a spherical structure.

6. The orthopedic internal fixation combination cannulated screw device of claim 5, wherein the thickness of the first stop tapers from a center to an outer expansion;

the thickness of the second baffle piece gradually thins from the center to the outside.

7. The orthopedic internal fixation combination cannulated screw device of claim 1, wherein the first cannulated screw is made of an absorbable material;

the second hollow screw is made of absorbable materials.

8. The orthopedic internal fixation combination cannulated screw device of claim 1, wherein the first cannulated screw is made of a non-absorbable material;

the second hollow screw is made of non-absorbable materials.

9. The orthopedic internal fixation combination cannulated screw device of claim 1, wherein the polygonal square hole structure one is an internal hexagonal structure;

and the second polygonal square hole structure is an internal hexagonal structure.

10. The orthopedic internal fixation combination cannulated screw device of claim 1, wherein the polygonal square hole structure one is a non-internal hexagonal structure;

the second polygonal square hole structure is a non-internal hexagonal structure.