CN108578022B

CN108578022B - Ankle joint fuses subassembly

Info

Publication number: CN108578022B
Application number: CN201810732574.6A
Authority: CN
Inventors: 马骏
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2018-07-05
Filing date: 2018-07-05
Publication date: 2023-08-01
Anticipated expiration: 2038-07-05
Also published as: CN108578022A

Abstract

The invention provides an ankle joint fusion assembly, comprising: the fusion body is provided with an implantation end and a fixed end, and the implantation end is used for being implanted between two adjacent joints; and the fixing part is rotatably arranged at the fixed end of the fusion body and used for respectively fixing the fusion body on two adjacent joints. By adopting the technical scheme provided by the invention, the technical problem that the ankle joint fusion component in the prior art cannot effectively fix the joints with serious comminuted fracture, serious bone defect, osteoporosis and poor soft tissue condition is solved.

Description

Ankle joint fuses subassembly

Technical Field

The invention relates to the technical field of medical instruments, in particular to an ankle joint fusion component.

Background

Currently, ankle joint fusion is one of the effective methods for treating ankle and foot joint fractures, relieving severe pain caused by arthritis and the like, stopping lesions, correcting ankle and foot deformities and maintaining stability thereof. Through years of development, ankle and foot joint fusion surgery has a plurality of styles, and the ankle and foot fusion fixing mode in the prior art comprises screw fixing, steel plate fixing, intramedullary nail fixing, external fixing frame fixing and the like.

For good bone fusion, satisfactory stability can be obtained by screw fixation. However, screw fixation is difficult to provide for firm fixation in osteoporotic patients, and steel plate fixation is preferred for such patients. However, because the ankle soft tissue is thin and the traction resistance is poor, the soft tissue injury is aggravated by the implantation of the steel plate, so the ankle soft tissue is not suitable for patients with poor soft tissue conditions. In addition, in patients with severe osteoporosis, if the long-term bone fusion effect is not good enough, fatigue fracture may occur in the steel plate. The intramedullary nail is used for fixation, which has advantages in rigidity, anti-rotation, dynamic pressurization and stress conduction, but is not suitable for patients with active infection, serious malformation and serious osteoporosis because the risk of infection and embolism is increased by marrow expansion.

For patients with severe comminuted fracture, severe bone defect, osteoporosis and poor soft tissue conditions, a large amount of autologous bone needs to be taken for fusion, firm initial fixation is difficult to realize, and the screws and the steel plates bear excessive load in the body for a long time, so that fatigue fracture is easy to cause. Accordingly, there is no effective fixation method for severe comminuted fracture, severe bone defect, osteoporosis, and poor soft tissue conditions.

Disclosure of Invention

The invention provides an ankle joint fusion component, which aims to solve the problem that the ankle joint fusion component in the prior art cannot effectively fix joints with serious fracture, serious bone defect, osteoporosis and poor soft tissue conditions.

The invention provides an ankle joint fusion assembly, comprising: the fusion body is provided with an implantation end and a fixed end, and the implantation end is used for being implanted between two adjacent joints; and the fixing part is rotatably arranged at the fixed end of the fusion body and used for respectively fixing the fusion body on two adjacent joints.

Further, through holes are formed in the fusion body and are used for being matched with two adjacent joints so that the fusion body can be fused with the two adjacent joints respectively.

Further, the fusion body is provided with a first fusion surface and a second fusion surface, the first fusion surface and the second fusion surface are both arranged between the implantation end and the fixed end, the first fusion surface is used for being in contact with one of two adjacent joints, the second fusion surface is used for being in contact with the other of the two adjacent joints, and the through hole extends along the direction from the first fusion surface to the second fusion surface.

Further, the fusion body is in a cylindrical structure or a wedge-shaped structure.

Further, the fixing portion includes: the first fixing piece is rotatably arranged at the fixed end of the fusion body and is used for being fixed with one of the two joints; the second fixing piece is rotatably arranged at the fixed end of the fusion body, and is arranged opposite to the first fixing piece and used for fixing the other joint of the two joints.

Further, the ankle fusion assembly further comprises: the first locking piece is arranged on the fixing part and is used for fixing the fixing part on the joint.

Further, the first locking piece comprises a locking nut, a threaded hole is formed in the fixing portion, and the locking nut is matched with the threaded hole to fix the fixing portion on two adjacent joints.

Further, the ankle fusion assembly further comprises: the connecting piece is arranged between the fixing part and the fusion body, and the fixing part is rotatably arranged on the fusion body through the connecting piece.

Further, ankle joint fuses subassembly still includes the second retaining member, the connecting piece is the spliced pole, the spliced pole has the toper end and the locking end of relative setting, the junction interval that fuses and fixed part are connected is provided with first bell mouth and second bell mouth, first bell mouth is used for with the cooperation of toper end, the second retaining member cooperates and locks the spliced pole through the second bell mouth with the locking end, the junction that fixed part is connected with the fuse body is provided with the connecting hole, the spliced pole wears to establish in proper order on first bell mouth, connecting hole and second bell mouth.

Further, the fusion body is made of an alloy material and polyether-ether-ketone.

By applying the technical scheme of the invention, the fusion body is arranged between two adjacent joints, and is fixed on the two adjacent joints through the fixing part, so that effective initial fixation can be ensured, and the fusion body does not need to be fixed again in a fixing mode such as a steel plate in the initial stage after operation. Meanwhile, after long-term bone fusion, bones on the joint are integrated with the fusion body, so that fatigue fracture of parts possibly occurring in long term is avoided. After the fixing part and the fusion body are fused with bones on the joint as a whole, a stable fusion system is formed, and the risk of long-term collapse which occurs in the traditional fusion device is avoided. Therefore, the ankle joint fusion component provided by the invention can solve the problem that the ankle joint fusion component in the prior art cannot effectively fix joints with serious comminuted fracture, serious bone defect, osteoporosis and poor soft tissue condition.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 illustrates a schematic structural view of an ankle fusion component coupled to an ankle and a foot in accordance with an embodiment of the present invention;

FIG. 2 illustrates a schematic structural view of an ankle fusion assembly provided in accordance with an embodiment of the present invention;

FIG. 3 shows a schematic structural view of a fusion body without a first tapered hole and a second tapered hole provided according to an embodiment of the present invention;

FIG. 4 illustrates a front view of a first fastener and fusion provided in accordance with an embodiment of the present invention;

FIG. 5 illustrates a right side view of a first fastener and fusion provided in accordance with an embodiment of the present invention;

FIG. 6 illustrates a right side view of a first mount provided in accordance with an embodiment of the present invention;

FIG. 7 illustrates a right side view of a fusion provided in accordance with an embodiment of the present invention;

FIG. 8 shows a schematic structural view of a connector provided according to an embodiment of the present invention;

fig. 9 shows a schematic structural view of a second locking member according to an embodiment of the present invention.

Wherein the above figures include the following reference numerals:

10. a fusion; 21. a first fixing member; 22. a second fixing member; 30. a first locking member; 40. a connecting piece; 50. and the second locking piece.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 and 2, an embodiment of the present invention provides an ankle fusion assembly, comprising: fusion 10 and a fixation portion. The fusion 10 has an implant end and a fixed end, wherein the implant end is used for being implanted between two adjacent joints. The fixing part is rotatably arranged at the fixing end of the fusion body 10, and the fixing part is used for respectively fixing the fusion body 10 on two adjacent joints.

By adopting the ankle joint fusion component provided by the embodiment, the fusion body 10 is arranged between two adjacent joints, and the fusion body 10 is fixed on the two adjacent joints through the fixing part, so that the effective initial fixation can be ensured, and the fixation is not needed to be carried out through fixing modes such as a steel plate in addition at the initial stage of operation. Meanwhile, after long-term bone fusion, bones on the joint are unified with the fusion body 10, so that fatigue fracture of parts possibly occurring in long term is avoided. After the fixing part and the fusion body 10 are fused with bones on joints as a whole, a stable fusion body 10 system is formed, and the risk of long-term collapse which occurs in the traditional fusion device is avoided. Therefore, the ankle joint fusion component provided by the invention can solve the problem that the ankle joint fusion component in the prior art cannot effectively fix joints with serious comminuted fracture, serious bone defect, osteoporosis and poor soft tissue condition.

Because of more ankle joints and foot joints, including ankle joints, heel dice, talus joints, tarsometatarsal joints, inter-metatarsal joints and the like, bone structures on two sides of different types of joints are different, and anatomical structures of different individuals of the same joint are different. And adopt ankle joint fusion subassembly in this embodiment, because the fixed part can rotate relative fusion 10, when carrying out ankle joint fusion, can be according to the angle of joint both ends *** anatomical structure's difference adjustment fixed part like this to with bone anatomical structure fine match thereby guarantee to form stable fixed. Meanwhile, when the patient has serious bone defect, the ankle joint fusion component provided by the embodiment can correspondingly reduce bone grafting quantity, even does not need bone grafting, and reduces the damage of autologous bone at other parts of the patient.

As shown in fig. 3, in order to improve the effect of primordial qi fusion, in this embodiment, a through hole is provided on the fusion body 10, and the through hole is used for matching with two adjacent joints so that the fusion body 10 is respectively fused with the two adjacent joints. Specifically, bone can be planted in the through hole; or fusion is realized by bone ingrowth at two sides of the joint instead of adopting a bone grafting mode. A plurality of through holes may be disposed at intervals on the fusion body 10, and specifically, two through holes are disposed at intervals on the fusion body 10 in this embodiment.

Specifically, the fusion body 10 in the present embodiment has a first fusion surface and a second fusion surface. The first fusion surface and the second fusion surface are both arranged between the implantation end and the fixed end, the first fusion surface is used for being contacted with one of the two adjacent joints, and the second fusion surface is used for being contacted with the other of the two adjacent joints. The through holes extend along the direction from the first fusion surface to the second fusion surface so that two adjacent joints can be fused better.

Specifically, the fusion body 10 is in a cylindrical structure or a wedge-shaped structure, and the structure of the fusion body 10 adapting to the cylindrical structure or the wedge-shaped structure can be designed according to different joint structures. The fusion body 10 in this embodiment is a wedge-shaped structure, and the area of the end face of the implanted end of the wedge-shaped structure is smaller than the area of the end face of the fixed end.

For better fixation, the fixation section includes: a first fixing member 21 and a second fixing member 22. The first fixing piece 21 is rotatably arranged at the fixed end of the fusion body 10, and the first fixing piece 21 is used for fixing with one of two joints. The second fixing member 22 is rotatably disposed at the fixed end of the fusion body 10, and the second fixing member 22 is disposed opposite to the first fixing member 21, and the second fixing member 22 is used for fixing with the other joint of the two joints. Specifically, the first fixing piece 21 and the second fixing piece 22 can be set to be of the same structure, the first fixing piece 21 and the second fixing piece 22 can be set to be fixing plates, and materials and specifications of the fixing plates can be designed according to actual use requirements so as to meet the matching of bones of different joint parts and different anatomical structures, and fixing and fusing effects are improved.

To better secure the anchor to the joint, the ankle fusion assembly of this embodiment also includes a first retaining member 30. The first locking member 30 is disposed on the fixing portion, and the first locking member 30 is used for fixing the fixing portion on the joint.

Specifically, the first locking member 30 includes a locking nut, and a threaded hole is provided in the fixing portion, and the locking nut cooperates with the threaded hole to fix the fixing portion to two adjacent joints. In order to further improve the fixing effect, in this embodiment, a plurality of threaded holes are provided in the fixing portion, and the threaded holes may be locking holes or non-locking holes.

As shown in fig. 4 to 8, the ankle joint fusion assembly further includes a connection member 40, the connection member 40 being disposed between the fixing portion and the fusion body 10, the fixing portion being rotatably disposed on the fusion body 10 through the connection member 40. In this embodiment, the first fixing element 21 and the second fixing element 22 are each rotatably arranged on the fusion body 10 via the connecting element 40.

As shown in FIG. 9, the ankle fusion assembly also includes a second retaining member 50. The connector 40 is a connecting post having oppositely disposed tapered and locking ends. The junction interval that the fusion 10 is connected with fixed part is provided with first bell mouth and second bell mouth, and first bell mouth is used for with the toper end cooperation, and second retaining member 50 cooperates and locks the spliced pole through the second bell mouth with the locking end, and the junction that the fixed part is connected with the fusion 10 is provided with the spliced hole, and the spliced pole wears to establish in proper order on first bell mouth, spliced hole and second bell mouth. The connecting column can be connected with the fixing part through a flat key. The fusion 10 and the fixing portion may be connected by other connection means as long as the fixing portion is rotatably provided on the fusion 10.

In this embodiment, the fusion body 10 is made of an alloy material and polyetheretherketone. The alloy material can be titanium alloy or tantalum alloy.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ankle fusion assembly, comprising:

a fusion body (10), the fusion body (10) having an implantation end and a fixation end, the implantation end being for implantation between two adjacent joints;

the fixing part is rotatably arranged at the fixed end of the fusion body (10) and is used for respectively fixing the fusion body (10) on two adjacent joints;

the ankle fusion assembly further includes:

a connecting member (40) provided between the fixing portion and the fusion body (10), the fixing portion being rotatably provided on the fusion body (10) through the connecting member (40);

the ankle joint fusion assembly further comprises a second locking piece (50), the connecting piece (40) is a connecting column, the connecting column is provided with a conical end and a locking end which are oppositely arranged, a first conical hole and a second conical hole are formed in the joint of the fusion body (10) and connected with the fixing part at intervals, the first conical hole is used for being matched with the conical end, the second locking piece (50) is matched with the locking end and locks the connecting column through the second conical hole, a connecting hole is formed in the joint of the fixing part and connected with the fusion body (10), and the connecting column sequentially penetrates through the first conical hole, the connecting hole and the second conical hole;

the connecting column is connected with the fixing part through a flat key.

2. Ankle joint fusion assembly according to claim 1, characterized in that the fusion body (10) is provided with through holes for cooperation with two adjacent joints for fusion of the fusion body (10) with two adjacent joints, respectively.

3. Ankle joint fusion assembly according to claim 2, characterized in that the fusion body (10) has a first fusion surface and a second fusion surface, both of which are arranged between the implant end and the fixed end, the first fusion surface being intended to be in contact with one of the two adjacent joints, the second fusion surface being intended to be in contact with the other of the two adjacent joints, the through-hole extending in the direction of the first fusion surface to the second fusion surface.

4. Ankle fusion assembly according to claim 1, characterized in that the fusion body (10) is of cylindrical or wedge-shaped configuration.

5. The ankle fusion assembly according to claim 1, wherein the securing portion comprises:

a first fixing member (21), wherein the first fixing member (21) is rotatably arranged at the fixed end of the fusion body (10), and the first fixing member (21) is used for fixing one of the two joints;

the second fixing piece (22), the second fixing piece (22) is rotatably arranged at the fixed end of the fusion body (10), the second fixing piece (22) is opposite to the first fixing piece (21), and the second fixing piece (22) is used for fixing the other joint of the two joints.

6. The ankle fusion assembly according to claim 1, wherein the ankle fusion assembly further comprises:

and the first locking piece (30) is arranged on the fixing part, and the first locking piece (30) is used for fixing the fixing part on the joint.

7. The ankle fusion assembly according to claim 6, wherein the first locking member (30) includes a locking nut having a threaded hole disposed therein, the locking nut cooperating with the threaded hole to secure the securing portion to two adjacent joints.

8. Ankle fusion assembly according to claim 1, characterized in that the fusion body (10) is made of an alloy material and polyetheretherketone.