CN213217418U

CN213217418U - Accurate Scarf cuts bone director

Info

Publication number: CN213217418U
Application number: CN202020949395.0U
Authority: CN
Inventors: 魏宝富; 伏传升
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-05-18
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses an accurate Scarf cuts bone director, include: the bone cutting device comprises a fixing plate and a plurality of baffles, wherein a main bone cutting groove and two auxiliary bone cutting groove combinations are arranged on the fixing plate, one auxiliary bone cutting groove combination is arranged on the upper side of the left half part of the main bone cutting groove, the other auxiliary bone cutting groove combination is arranged on the lower side of the right half part of the main bone cutting groove, each auxiliary bone cutting groove combination comprises a plurality of auxiliary bone cutting grooves, and any one auxiliary bone cutting groove in one auxiliary bone cutting groove combination, any one auxiliary bone cutting groove in the other auxiliary bone cutting groove combination and the main bone cutting groove can be freely combined into different Z shapes. The angle and the length of the osteotomy can be selected on the fixing plate according to actual conditions, various zigzag options are available, the rapid osteotomy can be accurately realized, the baffle plate is arranged, errors can be prevented during the osteotomy, and operation errors are avoided; the operation is simple and convenient, the wound is small, the osteotomy is accurate, the reduction and the fixation are convenient, the time and the labor are saved, and the postoperative osteotomy is fast to heal.

Description

Accurate Scarf cuts bone director

Technical Field

The utility model relates to the technical field of medical equipment, more specifically say, the utility model relates to an accurate Scarf cuts bone director.

Background

Hallux valgus is the most common foot deformity of middle-aged and elderly women, particularly severe hallux valgus deformity, and is very inconvenient to wear shoes and daily life. Patients with severe hallux valgus deformity and unstable first metatarsophalangeal joints have difficulty in correcting deformity by loosening simple distal soft tissues or combining Chevron osteotomy and minimally invasive osteotomy. Although Lapidus surgery and proximal basal osteotomy correction are also used for correcting moderate and severe hallux valgus deformity, the surgical trauma and the technical difficulty are large, the recovery time is long, and the learning curve is long. Scarf osteotomy has strong capability of correcting hallux valgus deformity, but because of the long Z-shaped osteotomy related to the metatarsal shaft, the technical difficulty is high, the learning curve is longer, if the osteotomy is inaccurate, the complications such as insufficient orthopedic capability, non-healing of postoperative osteotomy, malformation recurrence and the like easily occur. For moderate and severe hallux valgus deformity, especially rigid hallux valgus deformity, if rapid and accurate Scarf osteotomy is realized, the traditional instruments and methods are difficult to realize the requirement, so that a precise Scarf osteotomy guider needs to be provided to at least partially solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.

For at least partly solving the above-mentioned problem, the utility model provides a bone director is cut to accurate Scarf includes: the bone cutting device comprises a fixing plate and a plurality of baffles, wherein a main bone cutting groove and two auxiliary bone cutting groove combinations are arranged on the fixing plate, one auxiliary bone cutting groove combination is arranged on the upper side of the left half part of the main bone cutting groove, the other auxiliary bone cutting groove combination is arranged on the lower side of the right half part of the main bone cutting groove, each auxiliary bone cutting groove combination comprises a plurality of auxiliary bone cutting grooves, any one auxiliary bone cutting groove in one auxiliary bone cutting groove combination, any one auxiliary bone cutting groove in the other auxiliary bone cutting groove combination and the main bone cutting groove can be freely combined into different Z shapes, and the baffles are respectively used for blocking the auxiliary bone cutting grooves left in one auxiliary bone cutting groove combination and the auxiliary bone cutting grooves left in the other auxiliary bone cutting groove combination.

Preferably, it is a plurality of vice osteotomy groove includes two first vice osteotomy grooves, the vice osteotomy groove of two seconds, first vice osteotomy groove with the contained angle in main osteotomy groove is 60 degrees, the vice osteotomy groove of second with the contained angle in main osteotomy groove is 45 degrees, first vice osteotomy groove with the vice osteotomy groove of second distributes mutually.

Preferably, the first minor osteotomy groove and the second minor osteotomy groove are provided with first grooves on two long sides thereof.

Preferably, the baffle includes spacing ring, two stoppers, round bar, the lower surface of spacing ring with the upper surface of round bar is connected, two the stopper symmetry sets up the side of round bar just the upper surface of stopper with the spacing ring is connected, the stopper with first recess looks adaptation.

Preferably, the limiting ring is cylindrical, the diameter of the limiting ring is larger than the width of the first secondary osteotomy groove and the width of the second secondary osteotomy groove, and two symmetrical second grooves are formed in the side face of the limiting ring.

Preferably, the fixed plate is a cuboid, the main osteotomy groove is located at the center of the fixed plate, the horizontal center line and the vertical center line of the fixed plate coincide with each other, two positioning holes are formed in the fixed plate, and the circle centers of the two positioning holes are located on the horizontal center line of the main osteotomy groove and distributed at the left end and the right end of the main osteotomy groove.

Preferably, the fixing plate is provided with six fixing holes, two fixing holes symmetrically distributed about a horizontal center line of the main osteotomy groove are arranged on a vertical center line of the main osteotomy groove, and two fixing holes symmetrically distributed about a horizontal center line of the positioning hole are respectively arranged on vertical center lines of the two positioning holes.

Preferably, the device further comprises a connecting rod and a handle, wherein one end of the connecting rod is connected with the fixing plate, and the other end of the connecting rod is connected with the handle.

Preferably, the upper and lower sides of the main osteotomy groove are provided with scale marks.

Preferably, the fixing plate is made of a stainless steel material or a polyethylene plastic.

Compared with the prior art, the utility model discloses at least, including following beneficial effect:

1. the accurate Scarf osteotomy guider can select the angle and the length of osteotomy on the fixed plate according to actual conditions, has multiple optional zigzag shapes, accurately realizes quick osteotomy, and is provided with a baffle plate which can prevent errors during osteotomy and avoid operation errors; the operation is simple and convenient, the wound is small, the osteotomy is accurate, the reduction and the fixation are convenient, the time and the labor are saved, and the postoperative osteotomy is fast to heal.

An accurate Scarf osteotomy guide, other advantages, objects, and features of the invention will be in part apparent from the following description, and in part will be understood by those skilled in the art through a study and practice of the invention.

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 view of the overall structure of the precise Scarf osteotomy guide of the present invention.

Fig. 2 is the assembly structure diagram of the fixing plate and the baffle of the precise Scarf osteotomy guide of the present invention.

Fig. 3 is a schematic diagram of the zigzag selection on the fixing plate of the precise Scarf osteotomy guide of the present invention.

Fig. 4 is a schematic structural view of a fixing plate of the precise Scarf osteotomy guide of the present invention.

Fig. 5 is a schematic diagram of the position relationship between the fixing plate and the baffle of the precise Scarf osteotomy guide of the present invention.

Fig. 6 is a schematic diagram of a baffle structure of the precise Scarf osteotomy guide of the present invention.

Fig. 7 is a schematic side view of the overall structure of the accurate Scarf osteotomy guide of the present invention.

Fig. 8 is a schematic diagram of a precise Scarf osteotomy guide of the present invention for performing a zigzag osteotomy on a metatarsal bone.

1 is a fixing plate, 1-1 is a main osteotomy groove, 1-2 is an auxiliary osteotomy groove combination, 1-2-1 is a first auxiliary osteotomy groove, 1-2-2 is a second auxiliary osteotomy groove, 1-3 is a positioning hole, 1-4 is a fixing hole, 2 is a baffle, 2-1 is a limiting ring, 2-2 is a limiting block, 2-3 is a round rod, 3 is a connecting rod, 4 is a handle, a is a first groove, b is a second groove, and c is a scale mark.

Detailed Description

The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can implement the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1-8, the present invention provides a precise Scarf osteotomy guide, comprising: the method comprises the following steps: the bone fracture plate comprises a fixing plate 1 and a plurality of baffles 2, wherein a main osteotomy groove 1-1 and two auxiliary osteotomy groove combinations 1-2 are arranged on the fixing plate 1, one auxiliary osteotomy groove combination 1-2 is arranged on the upper side of the left half part of the main osteotomy groove 1-1, the other auxiliary osteotomy groove combination 1-2 is arranged on the lower side of the right half part of the main osteotomy groove 1-1, each auxiliary osteotomy groove combination 1-2 comprises a plurality of auxiliary osteotomy grooves, any one auxiliary osteotomy groove in one auxiliary osteotomy groove combination 1-2, any one auxiliary osteotomy groove in the other auxiliary osteotomy groove combination 1-2 and the main osteotomy groove 1-1 can be freely combined into different Z shapes, and the baffles 2 are respectively used for blocking the residual auxiliary osteotomy grooves in one auxiliary osteotomy groove combination 1-2, And another secondary osteotomy groove remaining in said secondary osteotomy groove combination 1-2.

The working principle of the technical scheme is as follows: each auxiliary osteotomy groove combination 1-2 on the fixing plate 1 comprises a plurality of auxiliary osteotomy grooves, one auxiliary osteotomy groove is respectively selected from the left half part and the right half part of the main osteotomy groove 1-1 according to the length of metatarsal bones of a patient during an operation, the two auxiliary osteotomy grooves are communicated with the main osteotomy groove 1-1 to form a Z shape, the auxiliary osteotomy grooves which are not selected are blocked by the baffle plate 2 and are not communicated with the main osteotomy groove 1-1, and then the miniature oscillating saw cuts bones along the selected osteotomy grooves.

The beneficial effects of the above technical scheme are that: the angle and the length of the osteotomy can be selected on the fixing plate 1 according to actual conditions, various zigzag shapes can be selected, the quick osteotomy can be accurately realized, the baffle 2 can prevent errors during osteotomy, and operation errors are avoided; the operation is simple and convenient, the wound is small, the osteotomy is accurate, the reduction and the fixation are convenient, the time and the labor are saved, and the postoperative osteotomy is fast to heal.

In one embodiment, the plurality of the auxiliary osteotomy grooves comprise two first auxiliary osteotomy grooves 1-2-1 and two second auxiliary osteotomy grooves 1-2-2, the included angle between the first auxiliary osteotomy groove 1-2-1 and the main osteotomy groove 1-1 is 60 degrees, the included angle between the second auxiliary osteotomy groove 1-2-2 and the main osteotomy groove 1-1 is 45 degrees, and the first auxiliary osteotomy grooves 1-2-1 and the second auxiliary osteotomy grooves 1-2-2 are distributed at intervals.

The working principle of the technical scheme is as follows: during operation, according to the length of metatarsal bones of a patient and actual needs, the left half part and the right half part of the main osteotomy groove 1-1 are respectively provided with one auxiliary osteotomy groove with the same angle, for example, the left half part and the right half part are respectively provided with a first auxiliary osteotomy groove 1-2-1 with an included angle of 60 degrees, the first auxiliary osteotomy groove and the main osteotomy groove 1-1 form a Z shape, the micro oscillating saw forms a Z-shaped osteotomy along the selected osteotomy groove, and the number of the first auxiliary osteotomy groove 1-2-1 and the second auxiliary osteotomy groove 1-2-2 can be increased according to the actual needs.

The beneficial effects of the above technical scheme are that: the first auxiliary osteotomy groove 1-2-1 and the second auxiliary osteotomy groove 1-2-2 can be selected according to the actual requirement of the operation, and the first auxiliary osteotomy groove and the second auxiliary osteotomy groove can be arranged and combined to form a Z shape with different lengths with the main osteotomy groove 1-1 for selection during the operation, thereby realizing accurate and rapid osteotomy and being convenient for resetting and fixing.

In one embodiment, the first sub osteotomy groove 1-2-1 and the second sub osteotomy groove 1-2-2 are provided with a first groove a on both long sides.

The working principle of the technical scheme is as follows: as only two auxiliary osteotomy grooves are needed during operation, the rest auxiliary osteotomy grooves can be blocked by the baffle 2, and the baffle 2 is inserted into the first groove a to prevent the unused auxiliary osteotomy groove from communicating with the main osteotomy groove 1-1.

The beneficial effects of the above technical scheme are that: through the design of the structure, the baffle 2 can be inserted into the first groove a, and the baffle 2 can also be pulled out from the first groove a through external force.

In one embodiment, the baffle 2 comprises a limiting ring 2-1, two limiting blocks 2-2 and a round rod 2-3, the lower surface of the limiting ring 2-1 is connected with the upper surface of the round rod 2-3, the two limiting blocks 2-2 are symmetrically arranged on the side surface of the round rod 2-3, the upper surfaces of the limiting blocks 2-2 are connected with the limiting ring 2-1, and the limiting blocks 2-2 are matched with the first groove a.

The working principle of the technical scheme is as follows: the eight auxiliary osteotomy grooves are formed in the fixing plate 1, only two auxiliary osteotomy grooves are needed in practical use, all the other six auxiliary osteotomy grooves are blocked by the baffle 2, the baffle 2 is used for preventing the unused auxiliary osteotomy grooves from being communicated with the main osteotomy groove 1-1, when the baffle 2 is used, the baffle 2 is inserted into the fixing plate 1 from top to bottom, the round rod 2-3 is firstly inserted into the auxiliary osteotomy grooves, then the limiting blocks 2-2 are inserted by aligning to the positions of the first grooves a, the first grooves a limit the horizontal movement of the limiting blocks 2-2 and further limit the horizontal movement of the baffle 2, at the moment, the lower surface of the limiting ring 2-1 is in contact with the upper surface of the fixing plate 1, and the axial movement of the baffle 2 can be limited.

The beneficial effects of the above technical scheme are that: baffle 2 can be accurate insert in the first recess a of fixed plate 1, also can relax extract with external force, through very simple structural design, baffle 2 can effectually avoid the doctor to make a mistake when the operation.

In one embodiment, the stop collar 2-1 is cylindrical and has a diameter greater than the widths of the first and second secondary osteotomy grooves 1-2-1 and 1-2-2, and two symmetrical second grooves b are formed on the side surface of the stop collar 2-1.

The working principle of the technical scheme is as follows: the diameter of the limiting ring 2-1 is larger than the width of the auxiliary osteotomy groove so as to limit the axial movement of the baffle 2, the baffle 2 can be clamped on the fixing plate 1, and the second groove b arranged on the side surface of the limiting ring 2-1 is convenient for clamping the baffle 2 by forceps or other tools which can be clamped during surgery, so that the baffle 2 can be conveniently inserted and pulled out.

The beneficial effects of the above technical scheme are that: just can realize blocking 2 on fixed plate 1 through simple structural design to the doctor uses tweezers just can easily to carry baffle 2 through second recess b, conveniently inserts and extracts, avoids producing the bacterium with the manual operation.

In one embodiment, the fixing plate 1 is a cuboid, the main osteotomy groove 1-1 is located at the center of the fixing plate 1, the horizontal center line and the vertical center line of the main osteotomy groove 1-1 are coincident, two positioning holes 1-3 are arranged on the fixing plate 1, and the circle centers of the two positioning holes 1-3 are located on the horizontal center line of the main osteotomy groove 1-1 and are distributed at the left end and the right end of the main osteotomy groove 1-1.

The working principle of the technical scheme is as follows: the patient lies on the back on an operating bed, a hallux side incision is made, skin soft tissues are cut, an periosteum stripper is separated along the surface of a metatarsal trunk periosteum and completely exposes the side of a metatarsal shaft, a distal end positioning hole 1-3 is positioned at the junction of 1/3 in the upper side of the neck of the metatarsal head and is 5mm away from the distal end joint surface of the metatarsal head, a proximal end positioning hole 1-3 is positioned at the junction of 1/3 in the lower side of the metatarsal base and is 5mm away from the metatarsal base, two Kirschner pins are placed in the positioning holes 1-3, and the positions of the positioning holes 1-3 are accurately seen through a C.

The beneficial effects of the above technical scheme are that: the positioning holes 1-3 are used for positioning the position of the fixing plate 1, and the positioning is accurate, so that the accuracy of the osteotomy is improved.

In one embodiment, six fixing holes 1-4 are formed in the fixing plate 1, two fixing holes 1-4 are formed in the vertical center line of the main osteotomy groove 1-1 and symmetrically distributed about the horizontal center line of the main osteotomy groove 1-1, and two fixing holes 1-4 are formed in the vertical center line of the two positioning holes 1-3 and symmetrically distributed about the horizontal center line of the positioning holes 1-3.

The working principle of the technical scheme is as follows: after the accurate positioning of the positioning holes 1-3 is confirmed, the osteotomy guider is tightly attached to the metatarsal trunk, and one Kirschner wire is respectively arranged in the six fixing holes 1-4 on the fixing plate 1 to ensure the stability of the osteotomy guider.

The beneficial effects of the above technical scheme are that: the fixing holes 1-4 can ensure the accurate insertion of the kirschner wire, further ensure the stability of the osteotomy guider and prevent the position deviation of the miniature oscillating saw when the miniature oscillating saw cuts bones along the selected osteotomy groove.

In one embodiment, the device further comprises a connecting rod 3 and a handle 4, wherein one end of the connecting rod 3 is connected with the fixing plate 1, and the other end of the connecting rod 3 is connected with the handle 4.

The working principle of the technical scheme is as follows: the lower end of the connecting rod 3 is connected with a long edge of the fixing plate 1, and forms a 60-degree included angle with the plane where the fixing plate is located, and the handle 4 can be designed into a ring shape to be conveniently held by hands when in use.

The beneficial effects of the above technical scheme are that: the connecting rod 3 and the handle 4 are convenient for a doctor to hold the osteotomy guider by hands during an operation, and the stability is improved.

In one embodiment, the upper and lower sides of the main osteotomy groove 1-1 are provided with graduation lines c.

The working principle of the technical scheme is as follows: when the osteotomy guide is used, the Z-shaped length can be selected according to the length of the metatarsus of a patient, the scale marks c on the upper side and the lower side of the main osteotomy groove 1-1 can display the length of the osteotomy line, and then the required auxiliary osteotomy groove is selected, so that the rapid and accurate osteotomy is realized.

The beneficial effects of the above technical scheme are that: the doctor can conveniently measure the length of the Z shape and select the required auxiliary osteotomy groove.

In one embodiment, the fixing plate 1 is made of stainless steel material or polyethylene plastic.

The working principle of the technical scheme is as follows: the stainless steel material is not easy to damage and can be repeatedly used after disinfection, but the perspective is inconvenient; the fixing plate 1 can be made of polyethylene plastic which is convenient to see through, but is disposable.

The beneficial effects of the above technical scheme are that: the fixing plate 1 is made of stainless steel materials, so that the fixing plate is environment-friendly and can be repeatedly used through cleaning and high-pressure disinfection, and resources and cost are saved; the polyethylene plastic is convenient for fluoroscopy and operation.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application suitable for this invention, and further modifications may be readily made by those skilled in the art, and the invention is therefore not limited to the specific details shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

1. A precision Scarf osteotomy guide, comprising: the bone cutting plate comprises a fixing plate (1) and a plurality of baffles (2), wherein a main osteotomy groove (1-1) and two auxiliary osteotomy groove combinations (1-2) are arranged on the fixing plate (1), one auxiliary osteotomy groove combination (1-2) is arranged on the upper side of the left half part of the main osteotomy groove (1-1), the other auxiliary osteotomy groove combination (1-2) is arranged on the lower side of the right half part of the main osteotomy groove (1-1), each auxiliary osteotomy groove combination (1-2) comprises a plurality of auxiliary osteotomy grooves, any one auxiliary osteotomy groove in one auxiliary osteotomy groove combination (1-2), any one auxiliary osteotomy groove in the other auxiliary osteotomy groove combination (1-2) and the main osteotomy groove (1-1) can be freely combined into different Z shapes, and the baffles (2) are respectively used for blocking the residual auxiliary osteotomy grooves in one of the auxiliary osteotomy groove combinations (1-2), And the other secondary osteotomy groove remaining in the secondary osteotomy groove combination (1-2).

2. The accurate Scarf osteotomy guide of claim 1, wherein said plurality of said secondary osteotomy slots comprises two first secondary osteotomy slots (1-2-1) and two second secondary osteotomy slots (1-2-2), said first secondary osteotomy slots (1-2-1) having an angle of 60 degrees with said main osteotomy slot (1-1), said second secondary osteotomy slots (1-2-2) having an angle of 45 degrees with said main osteotomy slot (1-1), said first secondary osteotomy slots (1-2-1) and said second secondary osteotomy slots (1-2-2) being spaced apart.

3. A precision Scarf osteotomy guide according to claim 2, wherein said first (1-2-1) and second (1-2-2) secondary osteotomy grooves are provided with a first groove (a) on both long sides.

4. The accurate Scarf osteotomy guide of claim 3, wherein the baffle (2) comprises a limiting ring (2-1), two limiting blocks (2-2) and a round rod (2-3), the lower surface of the limiting ring (2-1) is connected with the upper surface of the round rod (2-3), the two limiting blocks (2-2) are symmetrically arranged at the side of the round rod (2-3), the upper surface of the limiting block (2-2) is connected with the limiting ring (2-1), and the limiting blocks (2-2) are matched with the first groove (a).

5. A precision Scarf osteotomy guide according to claim 4, wherein said stop collar (2-1) is cylindrical with a diameter greater than the width of said first (1-2-1) and second (1-2-2) secondary osteotomy grooves, said stop collar (2-1) being flanked by two symmetrical second grooves (b).

6. The accurate Scarf osteotomy guide of claim 1, wherein the fixing plate (1) is a cuboid, the main osteotomy groove (1-1) is located at the center of the fixing plate (1) and the horizontal center line and the vertical center line of the fixing plate (1) are coincident, two positioning holes (1-3) are arranged on the fixing plate (1), and the centers of the two positioning holes (1-3) are located on the horizontal center line of the main osteotomy groove (1-1) and are distributed at the left end and the right end of the main osteotomy groove (1-1).

7. The accurate Scarf osteotomy guide of claim 6, wherein said fixation plate (1) is provided with six fixation holes (1-4), said main osteotomy groove (1-1) is provided with two said fixation holes (1-4) on a vertical centerline thereof, said two said fixation holes (1-4) being symmetrically distributed about a horizontal centerline of said main osteotomy groove (1-1), and said two said fixation holes (1-4) are symmetrically distributed about a horizontal centerline of said positioning holes (1-3) respectively on a vertical centerline of said two said positioning holes (1-3).

8. The accurate Scarf osteotomy guide of claim 1, further comprising a connecting rod (3), a handle (4), one end of said connecting rod (3) being connected to said fixation plate (1) and the other end being connected to said handle (4).

9. The precision Scarf osteotomy guide of claim 1, wherein said main osteotomy groove (1-1) is provided with graduation marks (c) on both upper and lower sides thereof.

10. A precision Scarf osteotomy guide according to claim 1, wherein said fixation plate (1) is made of stainless steel material or polyethylene plastic.