CN213910406U - Knee joint cuts bone lockplate and cuts bone system - Google Patents

Abstract

The utility model provides a knee joint cuts bone lockplate and cuts bone system, include: the head part is provided with a hole A, a hole B, a hole C and a hole D; the upper end of the backbone part is fixedly connected with the lower end of the head part, and the backbone part is provided with a first hole, a second hole and a third hole which are vertically spaced; the tail part is fixedly connected with the lower end of the backbone part, a fourth hole is also formed in the tail part, the tail part is of a gradually-thinned structure, and the tail end is smooth; the osteotomy locking plate is made of carbon fiber reinforced PEEK nonmetal material. The carbon fiber reinforced PEEK material is a non-metal material, cold welding can be stopped from the source when the locking plate is manufactured, and the carbon fiber reinforced PEEK material is an ideal insulator, cannot generate electrolytic reaction with other ions in human tissue fluid, and is not easy to corrode. The operation difficulty is reduced, the operation time is shortened, and the occurrence of operation accidents is reduced. And the carbon fiber reinforced PEEK material has the characteristics of completely comparable strength to titanium alloy, is easy to process, saves the processing cost and is beneficial to the implementation of environment-friendly work.

Description

Knee joint cuts bone lockplate and cuts bone system

Technical Field

The utility model relates to a medical device technical field, in particular to knee joint cuts bone lockplate and cuts bone system.

Background

The ToMoFix knee joint osteotomy system is a set of osteotomy fixing system designed based on a locking compression steel plate system (LCP), and the steel plate has strong angle stability, so that stable internal fixation can be obtained, and the rapid bone healing of osteotomy is accelerated.

Because the conical double-line thread at the head of the locking screw is required to be connected with the locking hole of the bone plate when the locking screw is used, the pure titanium and titanium alloy materials used at present have the possibility of cold welding with the bone plate (metal is adhered at normal temperature and welded together). Because most of the existing bone fracture plates are not permanently implanted into a human body, the human body needs to be taken out after the bone is healed, the bone fracture plates can be repaired when the bone fracture plates are subjected to nail breakage and plate breakage, the difficulty in operation is increased if cold welding is generated, the bone fracture plates are not easy to take out, the operation time is prolonged, the pain is brought to a patient, and even the contradiction between doctors and patients can be caused.

For the metal implant, after the metal implant is implanted into a human body, under the corrosion action of human body fluid, metal ions are easily released to enter the human body, and have certain toxic action on the human body.

The ToMoFix knee joint osteotomy system is developed according to the physiological structure of European and American patients, the physiological structures of the Chinese and European and American patients are different to a certain extent, and the head size of the ToMoFix knee joint osteotomy system is large, foreign body sensation is generated after the operation of the Chinese, and two wings of the head cannot be well attached to bones, so that the knee joint of the patient is continuously painful due to the fact that the Chinese has a small body size and the knee joint pain continues to occur after the operation.

SUMMERY OF THE UTILITY MODEL

The utility model provides a knee joint cuts bone lockplate and cuts bone system for at least one among the solution above-mentioned technical problem.

A knee osteotomy locking plate comprising:

the head part is provided with a hole A, a hole B, a hole C and a hole D;

the upper end of the backbone part is fixedly connected with the lower end of the head part, and the backbone part is provided with a first hole, a second hole and a third hole which are spaced up and down;

the top end of the tail part is fixedly connected with the lower end of the backbone part, a fourth hole is also formed in the tail part, the tail part is of a gradually-thinned structure, and the tail end is smooth;

the osteotomy locking plate is made of PEEK nonmetal materials.

Preferably, the head is T-shaped, the hole A, the hole B and the hole C are all arranged on a transverse T-shaped structure, the hole A, the hole B and the hole C are sequentially arranged horizontally at intervals, the hole D is arranged on a vertical T-shaped structure, the hole A, the hole B and the hole C are all round holes, and the hole D is an 8-shaped hole;

the bone trunk part is of a strip structure with the same width as the T-shaped vertical structure, and the width of the tail part is gradually reduced from the upper end to the lower end.

Preferably, the first hole and the second hole are both 8-shaped holes;

the first hole is a power hole, can be pressurized by using a lag screw and is used for enabling the osteotomy locking plate to generate elastic prestress, and is positioned in the middle of the osteotomy locking plate;

and the third hole and the fourth hole are both round holes.

Preferably, the round hole and the 8-shaped hole are threaded holes and are used for connecting a locking screw, and the thread of each threaded hole is a double-line conical thread;

the central lines of two adjacent holes and three adjacent holes in the first hole, the second hole, the third hole and the fourth hole are not positioned on the same straight line.

Preferably, the maximum width of the head is 28mm, and the distance between every two of the holes A, B and C is 8 mm.

The utility model discloses still pass through a knee joint osteotomy system, include: a locking plate for knee osteotomy as defined in any one of the preceding claims.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

The accompanying drawings 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 and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of the present invention used for osteotomy after the locking screw is connected.

FIG. 2 is a schematic structural view of the osteotomy locking plate of the present invention without the locking screw attached thereto;

fig. 3 is a schematic structural view of the drainage device of the present invention with a first buffer device and a second buffer device.

In the figure: 1. an osteotomy locking plate; 11. a head portion; 111. a hole A; 112. b hole; 113. c hole; 114. d, holes; 115. a T-shaped transverse structure; 116. a T-shaped vertical structure; 12. a backbone portion; 121. a first hole; 122. a second hole; 123. a third aperture; 13. a tail portion; 131. a fourth aperture; 2. a drainage device; 3. A fixed seat; 4. a mobile support; 5. a second buffer device; 51. a guide bar; 52. a limiting plate; 53. a second spring; 6. a first buffer device; 61. a hollow sphere; 611. an upper hemisphere; 612. a lower hemisphere; 62. a buffer ball; 63. a T-shaped connecting block; 64. a fixed shaft; 65. a first spring; 7. and locking the screw.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for description purposes, not specifically referring to the order or sequence, and are not intended to limit the present invention, but only to distinguish the components or operations described in the same technical terms, and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions and technical features between various embodiments can be combined with each other, but must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should be considered to be absent, and is not within the protection scope of the present invention.

Example 1

An embodiment of the utility model provides a knee joint cuts bone lockplate, as shown in fig. 1-2, include:

the head part 11 is provided with a hole A, a hole B, a hole C and a hole D;

a stem part 12, the upper end of which is fixedly connected with the lower end of the head part 11, the stem part 12 being provided with a first hole 121, a second hole 122 and a third hole 123 which are spaced up and down;

the top end of the tail part 13 is fixedly connected with the lower end of the backbone part 12, a fourth hole 131 is also formed in the tail part 13, the tail part 13 is of a gradually-thinned structure, and the tail end is smooth;

the osteotomy locking plate 1 is made of a PEEK (polyetheretherketone) nonmetal material, and preferably, the osteotomy locking plate can be made of a carbon fiber reinforced PEEK nonmetal material.

PEEK: the polyether-ether-ketone is a special engineering material with excellent properties of high temperature resistance, self-lubrication, easy processing, high mechanical strength and the like. PEEK is a plastic with both toughness and rigidity and a balance, and carbon fiber reinforced PEEK plastic is a non-metallic material and is a prior art.

The working principle and the beneficial effects of the technical scheme are as follows: the utility model discloses a raw and other materials are different from traditional metal material (titanium, titanium alloy), and the use is the non-metallic material of carbon fiber reinforcement PEEK. The PEEK is the material closest to human skeleton because of its advantages of no toxicity, light weight, abrasion resistance, etc., and can be organically combined with human body, and the carbon fiber reinforced PEEK has further improved mechanical property, chemical corrosion resistance, radiation resistance, high temperature resistance, etc.

The carbon fiber reinforced PEEK material is a non-metal material, cold welding can be stopped from the source when the osteotomy locking plate is manufactured, and the carbon fiber reinforced PEEK material is an ideal insulator, cannot generate electrolytic reaction with other ions in human tissue fluid, and is not easy to corrode. The operation difficulty is reduced, the operation time is shortened, and the occurrence of operation accidents is reduced. And according to the characteristics of the carbon fiber reinforced PEEK material, the strength of the carbon fiber reinforced PEEK material is completely comparable to that of titanium alloy, the carbon fiber reinforced PEEK material is easy to process, the processing cost of enterprises is saved, and the carbon fiber reinforced PEEK material is beneficial to the implementation of the environment-friendly work of the enterprises.

The tail part is the tail end which is gradually thinned and smooth, so that the bone fracture plate can be better inserted in the operation.

Example 2

On the basis of example 1, as shown in FIGS. 1-2;

the head 11 is T-shaped, holes A, B and C are all arranged on a T-shaped transverse structure 115 and are sequentially arranged horizontally at intervals, a hole D114 is arranged on a T-shaped vertical structure 116, the holes A111, B112 and C113 are all round holes, and the hole D114 is an 8-shaped hole;

the backbone part 12 is a strip-shaped structure with the same width as the T-shaped vertical structure, and the width of the tail part 13 is gradually reduced from the upper end to the lower end.

The working principle and the beneficial effects of the technical scheme are as follows: the head 11 is T-shaped, the hole A, the hole B and the hole C are all arranged on a transverse T-shaped structure, the hole A, the hole B and the hole C are sequentially arranged horizontally at intervals, and the hole D114 is arranged on a vertical T-shaped structure; the arrangement is T-shaped, and the arrangement of the four holes can ensure better stability.

The backbone part 12 is a strip-shaped structure with the same width as the T-shaped vertical structure, has a longer backbone part, and can uniformly disperse the occurring stress to the tibial backbone.

Example 3

On the basis of example 1 or 2, as shown in FIGS. 1-2;

the first hole 121 and the second hole 122 are both 8-shaped holes;

the first hole 121 is a power hole which can be pressurized by a lag screw and is used for generating elastic prestress on the osteotomy locking plate 1, and the first hole 121 is positioned in the middle of the locking plate 1;

the third hole 123 and the fourth hole 131 are both circular holes.

The working principle and the beneficial effects of the technical scheme are as follows: the first hole 121 is a power hole and can be pressurized using a lag screw to slightly bend the osteotomy locking plate, thereby creating a resilient pre-stress. The tail part is a tapered and smooth tail end, so that the bone fracture plate can be better inserted in the operation process, and the first hole 121 is positioned in the middle of the locking plate 1 to ensure the stability.

Example 4

On the basis of any one of embodiments 1 to 3;

the round hole and the 8-shaped hole are threaded holes and are used for connecting a locking screw, and threads of the threaded holes are double-line conical threads;

the central lines of two adjacent holes and three adjacent holes in the first hole 121, the second hole 122, the third hole 123 and the fourth hole are not located on the same straight line.

The working principle and the beneficial effects of the technical scheme are as follows: the round hole and the 8-shaped hole are threaded holes and are used for being connected with a locking screw, and threads of the threaded holes are double-line conical threads, so that better angular stability can be provided. The central lines of two adjacent holes of the first hole 121, the second hole 122, the third hole 123 and the fourth hole and between the two adjacent holes are not located on the same straight line, so that the structural stability of the whole locking plate is improved.

Example 5

On the basis of any one of embodiments 1 to 4;

the maximum width of the head part 11 is 28mm, and the distance between every two of the hole A, the hole B and the hole C is 8 mm.

The working principle and the beneficial effects of the technical scheme are as follows: by optimizing the size of the head, the appearance and the size of the head are reduced, so that the head can be more suitable for the bone parameters of Chinese people.

Example 6

On the basis of any one of embodiments 1 to 5;

the use method of the osteotomy locking plate 1 comprises the following steps:

step 1: planning a force line before an operation, and determining an orthopedic angle;

when in operation, the osteotomy is firstly performed, the osteotomy area is expanded until the planned orthopedic angle is reached, and then the osteotomy locking plate 1 is inserted in a minimally invasive way; before insertion, drill guides are screwed into the hole A, the hole B and the hole C of the osteotomy locking plate 1, locking gaskets are respectively arranged in the hole D114 and the fourth hole 131 of the tail part 13, and after the osteotomy locking plate 1 is inserted, a kirschner wire is inserted into the hole B112 in the middle hole of the head part 11 for temporary fixation;

using a 4.3mm lcp drill to drill a thread in hole A, C, hole 113, and sequentially implanting screws in hole A, C and locking using a 4.0N · m torque limit wrench; then taking out the kirschner wire in the hole B112, implanting a self-tapping locking screw 7 and fixing;

step 2: implanting a temporary lag screw in a neutral position in a power hole in the first hole 121, drilling threads in the lower half hole, the second hole, the third hole and the fourth hole of the first hole 121 by using a universal drill guide, straightening the leg of the patient with the thread angle of the lower half hole slightly towards the far end (tail end), and implanting a self-tapping cortical bone screw in the lower half hole of the first hole;

and step 3: implanting and tightening locking screws once in the second and third holes 122 and 123, removing the locking washer in the fourth hole 131, and implanting and tightening the locking screw 7 in the fourth hole 131;

taking out the lag screw in the first hole 121, implanting the locking screw 7 and screwing;

taking out the locking washer in the D hole 114, implanting a locking screw 7 in the D hole 114 and screwing;

and detecting the position of the implant, closing the incision and finishing the operation.

Example 7

On the basis of any of examples 1 to 5, as shown in FIG. 3,

the utility model also provides a knee joint cuts bone system.

Example 8

On the basis of the embodiment 7, as shown in fig. 3, the device further comprises a drainage device 2, a plurality of first buffer devices 6, a fixed seat 3 and a plurality of second buffer devices 5, wherein the fixed seat 3 is fixedly connected to the periphery of the lower end of the drainage device 2;

the movable support 4 is arranged below the drainage device 2;

the plurality of second buffer devices 5 are arranged along the peripheral side of the drainage device 2, and the second buffer devices 5 include: the lower end of the guide rod 51 is fixedly connected to the upper end of the movable support 4; a vertical through hole is formed in the fixed seat 3, the upper part of the guide rod 51 is positioned in the vertical through hole, and a limiting plate 52 is arranged at the upper end of the guide rod 51; the second spring 53 is sleeved on the guide rod 51, one end of the second spring 53 is fixedly connected with the lower end of the fixed seat 3, and the other end of the second spring 53 is fixedly connected with the upper end of the movable support 4; the first buffer devices 6 are fixedly connected to the lower end of the drainage device 2;

the first buffer 6 includes:

the hollow sphere 61 is composed of an upper hemisphere 611 and a lower hemisphere 612, the upper hemisphere 611 is fixedly connected in a first spherical groove at the lower end of the drainage device, and the lower end of the lower hemisphere 612 is fixedly connected in a second spherical groove at the upper end of the movable support;

a fixed shaft 64 located between the upper hemisphere 611 or the lower hemisphere 612;

a plurality of buffer assemblies uniformly arranged along the circumferential direction of the fixed shaft 64;

the buffer assembly includes: one end of each buffer ball 62 is fixedly connected with one end of the first spring 65, and the other end of each buffer ball 62 is fixedly connected with the upper hemisphere 611 or the lower hemisphere 612;

and the vertical end of the T-shaped connecting block 63 is fixedly connected with the outer side wall of the fixed shaft 64, and the horizontal end of the T-shaped connecting block 63 is fixedly connected with the other end of the first spring 65.

The mobile support 4 is shown as being moved by wheels; the drainage device 2 is prior art and will not be described in detail herein.

The working principle and the beneficial effects of the technical scheme are as follows: in the first buffer device 6, when vibration is generated on the movable support 4 (for example, due to uneven road when the wheels move), the vibration is transmitted to the first spring 65 through the lower end of the lower hemisphere 612, and is buffered by the first spring 65, so that the vibration is prevented from being directly transmitted to the drainage device 2, and the work of the drainage device 2 is prevented from being influenced; when the drainage device 2 generates vibration, the vibration is transmitted to the first spring 65 through the upper hemisphere 611, and is buffered through the first spring 65, so that the vibration is prevented from being directly transmitted to the movable support 4 to influence wheels on the movable support 4, and the service life of the wheels is shortened; in addition, set up second buffer 5, cushion the shock attenuation to drainage device 2 outside all around, through first buffer 6 and second buffer 5 better to drainage device 2's cushioning effect to prolong the life of whole device.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (6)

1. A knee osteotomy locking plate, comprising:

the head part (11), the head part (11) is provided with a hole A (111), a hole B (112), a hole C (113) and a hole D (114);

the upper end of the backbone part (12) is fixedly connected with the lower end of the head part (11), and the backbone part (12) is provided with a first hole (121), a second hole (122) and a third hole (123) which are spaced up and down;

the top end of the tail part (13) is fixedly connected with the lower end of the backbone part (12), a fourth hole (131) is also formed in the tail part (13), the tail part (13) is of a gradually-thinned structure, and the tail end is smooth;

the osteotomy locking plate (1) is processed by PEEK nonmetal materials.

2. The knee osteotomy locking plate of claim 1,

the head (11) is T-shaped, the hole A (111), the hole B (112) and the hole C (113) are all formed in a T-shaped transverse structure (115), the hole A (111), the hole B (112) and the hole C (113) are sequentially arranged horizontally at intervals, the hole D (114) is formed in a T-shaped vertical structure (115), the hole A (111), the hole B (112) and the hole C (113) are all round holes, and the hole D (114) is an 8-shaped hole;

the backbone part (12) is of a strip structure with the same width as the T-shaped vertical structure (115), and the width of the tail part (13) is gradually reduced from the upper end to the lower end.

3. The knee osteotomy locking plate of claim 2,

the first hole (121) and the second hole (122) are both 8-shaped holes;

the first hole (121) is a power hole, can be pressurized by using a lag screw and is used for enabling the osteotomy locking plate (1) to generate elastic prestress, and the first hole (121) is positioned in the middle of the osteotomy locking plate (1);

the third hole (123) and the fourth hole (131) are both round holes.

4. The knee osteotomy locking plate according to claim 3, wherein said round hole and said 8-shaped hole are threaded holes for connecting locking screws (2), and the thread of said threaded holes is double-line conical thread;

the central lines of two adjacent holes in the first hole (121), the second hole (122), the third hole (123) and the fourth hole (131) and the central lines of three adjacent holes are not located on the same straight line.

5. A locking plate for knee osteotomy according to claim 1, wherein said head (11) has a maximum width of 28mm and the distance between each of said a (111), B (112) and C (113) holes is 8 mm.

6. A knee osteotomy system, comprising: a knee osteotomy locking plate of any one of claims 1-5.

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