Intercondylar osteotomy tool

Abstract

The utility model discloses an intercondylar osteotomy tool. The intercondylar osteotomy tool comprises a tailstock, a guide part, a front blade and a side blade, the tailstock is provided with a limiting plane; the guide part is arranged at one end of the tailstock, and the guide part is provided with a guide inclined surface and is used for discharging cut bones; a first cutting edge is arranged at one end of the front blade, and the other end of the front blade is connected with the guide part and forms a certain angle with the guide inclined plane; the side blades are arranged on the two sides of the front blade, a second cutting edge is arranged at one end of each side blade, and the other end of each side blade is connected with the tailstock. Wherein the front edge, the side edge and the guide inclined surface define a guide space with an opening, the first cutting edge and the second cutting edge are arranged on the same side and are used for cutting bones of the femoral intercondylar part, and the cut bones are discharged through the guide space and the guide part. According to the intercondylar osteotomy tool, the bone can be rapidly cut off, the cut bone can be discharged in time, and osteotomy is more accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to an intercondylar osteotomy tool. Background Art

[0002] Artificial femoral condyle prosthesis is divided into two types of prosthesis design according to different design theories: posterior cruciate ligament replacement type and posterior cruciate ligament retention type. The posterior cruciate ligament replacement type artificial femoral condyle prosthesis needs osteotomy to remove the bone between the patient's femoral condyle during installation in the operating room, to create a rectangular space to facilitate the implantation of the artificial femoral condyle prosthesis and avoid interference. This requires a suitable surgical instrument to accurately, quickly and labor-savingly remove the bone in this area through osteotomy, saving operation time and reducing the possibility of bleeding and complications.

[0003] One type of existing osteotomy tool is a sheet-like blade structure. This osteotomy tool can quickly remove bones, but its accuracy is greatly affected by the doctor's operating level. In addition, this osteotomy tool usually removes more bones to facilitate the implantation of artificial femoral condyle prosthesis, resulting in unnecessary bone loss. Another type of osteotomy tool is a rectangular instrument that is consistent with the shape of the bone to be removed. This instrument has extremely high accuracy, but because there are blades on all four sides, the bone removed by osteotomy cannot be quickly discharged, so the operation resistance is extremely large and the efficiency of osteotomy to remove bones is also low.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide an intercondylar osteotomy tool, which can quickly remove bones and discharge the removed bones in time, and the osteotomy is more accurate.

[0006] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides an intercondylar osteotomy tool, which includes: a tailstock, a guide portion, a front blade and a side blade. The tailstock has a limiting plane; the guide portion is arranged at one end of the tailstock, and the guide portion has a guide bevel for discharging the cut bone; a first cutting edge is arranged at one end of the front blade, and the other end is connected to the guide portion and arranged at a certain angle to the guide bevel; the side blade is arranged on both sides of the front blade, and a second cutting edge is arranged at one end of the side blade, and the other end is connected to the tailstock; wherein the front blade, the side blade and the guide bevel form a guide space with an opening, and the first cutting edge and the second cutting edge are arranged on the same side, which are used to cut the bone in the intercondylar part of the femur, and the cut bone is discharged through the guide space and the guide portion.

[0007] In one or more embodiments of the present invention, the thickness of the first cutting edge and the second cutting edge is less than or equal to 1.5 mm.

[0008] In one or more embodiments of the present invention, the first cutting edge and the second cutting edge have a plurality of saw teeth, and the plurality of saw teeth are arranged along an extension direction of the first cutting edge and the second cutting edge.

[0009] In one or more embodiments of the present invention, the angle between the guide bevel and the front edge is between 120° and 170°; and / or the angle between the side edge and the front edge is between 90° and 150°.

[0010] In one or more embodiments of the present invention, the second cutting edge at least partially protrudes from a plane where the first cutting edge is perpendicular to the front cutting edge.

[0011] In one or more embodiments of the present invention, the second cutting edge is inclined relative to the vertical direction of the front cutting edge, and the second cutting edge extends from a side of the side cutting edge close to the front cutting edge toward a direction close to the tail stock.

[0012] In one or more embodiments of the present invention, the second cutting edge is inclined relative to the vertical direction of the front cutting edge, and the second cutting edge extends from a side of the side cutting edge close to the front cutting edge toward a direction away from the tail stock.

[0013] In one or more embodiments of the present invention, the second cutting edge includes a first cutting segment and a second cutting segment, and the first cutting segment and the second cutting segment are arranged to be inclined with respect to each other.

[0014] In one or more embodiments of the present invention, a connecting portion is provided on a side of the tailstock away from the limiting plane, for connecting the intercondylar osteotomy tool to the osteotomy tool holding piece.

[0015] In one or more embodiments of the present invention, guide grooves are provided on both sides of the connecting portion, and the osteotomy tool holding piece is clamped on the connecting portion along the guide grooves.

[0016] Compared with the prior art, the intercondylar osteotomy tool of the utility model is provided with a front blade and a side blade, and a guide space is formed between the side blade, the front blade and the guide bevel to facilitate the discharge of the cut bone. Secondly, the inclined setting of the guide bevel and the front blade further facilitates the discharge of the cut bone, avoids the accumulation of bones and increases the resistance to osteotomy, thereby reducing the operating resistance, saving operation time, and reducing the possibility of bleeding and complications. In addition, the tailstock has a limiting plane that can abut against the bone to prevent excessive cutting and make the osteotomy more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of an intercondylar osteotomy tool in one embodiment of the utility model;

[0019] Figure 2 A schematic diagram of an intercondylar osteotomy tool in another embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of an intercondylar osteotomy tool in another embodiment of the utility model;

[0021] Figure 4 A schematic diagram of an intercondylar osteotomy tool in yet another embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of an intercondylar osteotomy tool having a second cutting edge with a V-shaped structure in one embodiment of the utility model;

[0023] Figure 6 It is a schematic diagram of an intercondylar osteotomy tool provided with saw teeth in one embodiment of the utility model;

[0024] Figure 7 for Figure 6 Enlarged view of area A in the middle;

[0025] Figure 8 It is a schematic diagram of an embodiment of the utility model in which the side edge is inclined relative to the front edge.

[0026] Description of main reference numerals:

[0027] 1-tail stock, 11-limiting plane, 2-guide portion, 21-guide slope, 3-front edge, 31-first cutting edge, 4-side edge, 41-second cutting edge, 411-first cutting section, 412-second cutting section, 5-saw teeth, 6-connecting portion, 61-guide groove, 7-guide space. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] like Figure 1-7 As shown, an intercondylar osteotomy tool in one embodiment of the utility model comprises: a tailstock 1, a guide portion 2, a front blade 3 and a side blade 4. The tailstock 1 has a limiting plane 11. The guide portion 2 is arranged at one end of the tailstock 1, and the guide portion 2 has a guide bevel 21, which is used to discharge the cut bone. A first cutting edge 31 is arranged at one end of the front blade 3, and the other end is connected to the guide portion 2 and is arranged at a certain angle to the guide portion 2. The side blade 4 is arranged on both sides of the front blade 3, and a second cutting edge 41 is arranged at one end of the side blade 4, and the other end is connected to the tailstock 1. Among them, the front blade 3, the side blade 4 and the guide bevel 21 surround a guide space 7 with an opening, and the first cutting edge 31 and the second cutting edge 41 are arranged on the same side, which are used to cut the bone in the intercondylar part of the femur, and the cut bone is discharged through the guide space 7 and the guide portion 2.

[0030] In the above embodiment, the front blade 3, the side blade 4 and the guide bevel 21 form a guide space 7 with an opening. The opening of the guide space 7 is located at the top, and the cut bone can be discharged along the guide space 7. Further, the guide bevel 21 is inclined relative to the front blade 3. For example, the angle between the guide bevel 21 and the front blade 3 can be between 120° and 170°, which is convenient for discharging the cut bone. The guide space 7 and the guide part 2 with an opening can prevent the cut bone from piling up and increasing the bone cutting resistance, thereby reducing the operation resistance, saving the operation time, and reducing the possibility of bleeding and complications.

[0031] In one embodiment, if Figure 8 As shown, the front edge 3 and the side edge 4 can be arranged vertically or inclined to meet different bone cutting requirements. For example, the angle between the front edge 3 and the front edge 4 can be between 90° and 150°. Preferably, the angle between the front edge 3 and the side edge 4 is 90°.

[0032] In one embodiment, the thickness of the first cutting edge 31 and the second cutting edge 41 is less than or equal to 1.5 mm, so as to ensure the sharpness of the first cutting edge 31 and the second cutting edge 41 and reduce the cutting resistance. Figure 6 and Figure 7As shown, the first cutting edge 31 and the second cutting edge 41 may have a plurality of saw teeth 5, and the plurality of saw teeth 5 are arranged along the extension direction of the first cutting edge 31 and the second cutting edge 41 until the first cutting edge 31 and the second cutting edge 41 are fully covered. When the front cutting edge 3 and the side cutting edge 4 are against the bone to be cut, the plurality of saw teeth 5 can prevent the osteotomy tool from sliding away from the predetermined cutting position, thereby ensuring the accuracy of the cutting.

[0033] In one embodiment, if Figure 1 As shown, the ends of the front edge 3 and the side edge 4 provided with the cutting edges can be flush, so that the first cutting edge 31 and the second cutting edge 41 are located on the same vertical plane.

[0034] In another embodiment, Figure 2 As shown, the second cutting edge 41 may at least partially protrude from the plane where the first cutting edge 31 is perpendicular to the front cutting edge 3. The partially protruding arrangement of the second cutting edge 41 may allow it to contact the bone to be cut earlier than the first cutting edge 31 for cutting.

[0035] Further, such as Figure 3 As shown, the second cutting edge 41 is inclined relative to the vertical direction of the front cutting edge 3, and the second cutting edge 41 extends from the side of the side cutting edge 4 close to the front cutting edge 3 to the direction close to the tailstock 1. Figure 4 As shown, the second cutting edge 41 can also be arranged in another manner. For example, the second cutting edge 41 is arranged obliquely relative to the vertical direction of the front cutting edge 3, and the second cutting edge 41 extends from the side of the side cutting edge 4 close to the front cutting edge 3 to the direction away from the tailstock 1. In another embodiment, as Figure 5 As shown, the second cutting edge 41 includes a first cutting segment 411 and a second cutting segment 412, and the first cutting segment 411 and the second cutting segment 412 are arranged to be inclined with respect to each other, so that a "V"-shaped structure is formed between the first cutting segment 411 and the second cutting segment 412. In the above-mentioned various arrangements of the first cutting edge 31 and the second cutting edge 41, the second cutting edge 41 is arranged to protrude relative to the first cutting edge 31, so that the second cutting edge 41 can cut into the bone earlier than the first cutting edge 31. Compared with the first cutting edge 31 and the second cutting edge 41 cutting into the bone at the same time, the second cutting edge 41 cuts into the bone first, which can reduce the resistance of cutting. In addition, since the second cutting edge 41 is arranged on both sides of the first cutting edge 31, the second cutting edge 41 cuts into the bone first, and can also play a positioning role to improve the accuracy of cutting.

[0036] In one embodiment, a connecting portion 6 is provided on one side of the tailstock 1 away from the limiting plane 11, for connecting the intercondylar osteotomy tool to the osteotomy tool holder. Further, guide grooves 61 are provided on both sides of the connecting portion 6, and the osteotomy tool holder is clamped on the connecting portion 6 along the guide grooves 61.

[0037] In summary, the intercondylar osteotomy tool is provided with a front blade 3 and a side blade 4, and the side blade 4, the front blade 3 and the guide bevel 21 enclose a guide space 7 for facilitating the discharge of the bone removed from the intercondylar part of the femur. Secondly, the guide bevel 21 and the front blade 3 are arranged obliquely to facilitate the discharge of the cut bone, avoid the accumulation of the cut bone to increase the resistance to osteotomy, thereby reducing the operating resistance, saving the operation time, and reducing the possibility of bleeding and complications. In addition, the tailstock 1 has a limiting plane 11, which can abut against the bone to prevent excessive cutting and make the osteotomy more accurate.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An intercondylar osteotomy tool, characterized in that: include: Tailstock, with limiting plane; A guide portion is arranged at one end of the tailstock, and the guide portion has a guide slope for discharging the cut bone; A front blade, one end of which is provided with a first cutting edge, and the other end of which is connected to the guide portion and is arranged at a certain angle to the guide slope; and Side blades are arranged on both sides of the front blade, one end of the side blade is provided with a second cutting edge, and the other end is connected to the tail stock; The front blade, side blade and guide bevel form a guide space with an opening, and the first blade edge and the second blade edge are arranged on the same side for cutting bones in the intercondylar area of ​​the femur, and the cut bones are discharged through the guide space and the guide part.

2. The intercondylar osteotomy tool according to claim 1, characterized in that: The thickness of the first cutting edge and the second cutting edge is less than or equal to 1.5 mm.

3. The intercondylar osteotomy tool according to claim 1, characterized in that: The first cutting edge and the second cutting edge have a plurality of saw teeth, and the plurality of saw teeth are arranged along the extending direction of the first cutting edge and the second cutting edge.

4. The intercondylar osteotomy tool according to claim 1, characterized in that: The included angle between the guide slope and the front edge is between 120° and 170°; and / or the included angle between the side edge and the front edge is between 90° and 150°.

5. The intercondylar osteotomy tool according to claim 1, characterized in that: The second cutting edge at least partially protrudes from a plane where the first cutting edge is perpendicular to the front cutting edge.

6. The intercondylar osteotomy tool according to claim 5, characterized in that: The second cutting edge is arranged obliquely relative to the vertical direction of the front cutting edge, and the second cutting edge extends from a side of the side cutting edge close to the front cutting edge toward a direction close to the tail stock.

7. The intercondylar osteotomy tool according to claim 5, characterized in that: The second cutting edge is arranged obliquely relative to the vertical direction of the front cutting edge, and the second cutting edge extends from a side of the side cutting edge close to the front cutting edge toward a direction away from the tail stock.

8. The intercondylar osteotomy tool according to claim 1, characterized in that: The second cutting edge includes a first cutting segment and a second cutting segment, and the first cutting segment and the second cutting segment are arranged to be inclined relative to each other.

9. The intercondylar osteotomy tool according to claim 1, characterized in that: A connecting portion is provided on one side of the tailstock away from the limiting plane, for connecting the intercondylar osteotomy tool to the osteotomy tool holding piece.

10. The intercondylar osteotomy tool according to claim 9, characterized in that: Guide grooves are provided on both sides of the connection part, and the osteotomy tool holding piece is clamped on the connection part along the guide grooves.

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