Osteotomy positioning instrument

Abstract

The embodiment of the utility model provides an osteotomy positioning instrument, which comprises a back plate, an angle block and a positioning device, the connecting assembly is arranged on the back plate and is used for detachably arranging the angle block on the mounting position; the cartilage gasket assembly comprises a plurality of different cartilage gaskets; the fixing assembly is arranged on the back plate in the direction perpendicular to the back plate, and the cartilage gasket is detachably fixed to the back plate through the fixing assembly. The osteotomy positioning instrument is simple in structure, convenient to use and capable of providing accurate guidance for osteotomy positioning.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to the orthopedic medical instrument technical field, especially relates to a bone cutting positioning instrument. BACKGROUND

[0002] In knee joint replacement surgery, the existing bone cutting measurement positioning appliances generally have the following problems:

[0003] 1. The control problem of cartilage wear and bone cutting amount: due to the wear of femoral condyle cartilage, the change of cartilage thickness can be ignored by using the traditional measurement method, thereby causing unnecessary excessive bone cutting.

[0004] 2. The positioning error problem of asymmetric cartilage wear: when the wear degree of the medial and lateral condyle cartilage is different, the standard external rotation positioning method can cause positioning error, affect the accuracy of the operation, and further can cause postoperative knee instability or function limitation.

[0005] 3. The limitation problem of fixed external rotation positioning angle: the commonly used external rotation positioning measurement system adopts a fixed reference angle (such as 3°, 5°, 7°), and this design cannot adapt to the anatomical differences of different patients, and limits the individualized adjustment of the operation.

[0006] 4. The frequent infection complication problem: although some adjustable external rotation positioners solve the problem of fixed angle, the angle module is repeatedly disassembled, cleaned and disinfected, which can cause infection or increase the operation error caused by damage. UTILITY MODEL CONTENT

[0007] The utility model provides a bone cutting positioning instrument which is simple in structure, convenient to use and can provide accurate guidance for bone cutting positioning.

[0008] In order to solve the above technical problems, the embodiment of the utility model provides a bone cutting positioning instrument, which comprises:

[0009] A back plate, which is provided with a mounting position for mounting an angle block;

[0010] A connecting assembly arranged on the back plate and used for detachably mounting the angle block on the mounting position;

[0011] A cartilage gasket assembly comprising a plurality of different cartilage gaskets;

[0012] A fixing assembly arranged on the back plate in a direction perpendicular to the back plate, and the cartilage gasket is detachably fixed on the back plate through the fixing assembly.

[0013] In an embodiment, the backboard comprises vertical and horizontal parts which match a "king" character shape, the vertical part is arranged along the center line of the backboard, the horizontal part comprises a first part, a second part and a third part, the first part and the third part are located on both sides of the second part, the connecting assembly and the mounting position are arranged on the second part, and the fixing assembly is arranged on the third part.

[0014] In an embodiment, the angle block is two, and the opposite sides of the angle block are application sides and represent left and right femoral sections respectively. The two angle blocks are arranged side by side, and the same side of the two angle blocks represents different meanings.

[0015] In an embodiment, the angle block is provided with a positioning hole penetrating through the angle block. The positioning hole on the angle block is used as a reference for the positioning hole on the angle block on the medial side of the femur. The positioning holes on the two angle blocks have an angle difference. The angle difference is used to indicate the internal and external rotation angle of the femur. The angle difference ranges from 0° to 10°, and the minimum unit includes 0.2°.

[0016] In an embodiment, the angle block is a disposable angle block.

[0017] In an embodiment, the second part is provided with a mounting hole on both sides of the center line of the backboard for forming the mounting position. The two mounting holes are positionally symmetrical. The two mounting holes are matched with the shapes of the corresponding angle blocks, so that at least part of the angle blocks can be embedded in the holes.

[0018] In an embodiment, the angle block and the second part are connected by a connecting piece. The connecting assembly is limitingly connected with the connecting piece, so that the angle block can be detachably arranged on the mounting position.

[0019] In an embodiment, the connecting assembly comprises a first connecting block and a second connecting block arranged on one side of the backboard provided with the angle block and located on both sides respectively. The first connecting block and the second connecting block are both provided with a positioning rod. The two positioning rods can be rotated close to each other to clamp and fix the angle block, or rotated away from each other to release the angle block.

[0020] In an embodiment, the two ends of the third part are respectively provided with an extension. The extension and the fixing assembly are located on the first side of the backboard, and the connecting assembly is arranged on the second side of the backboard. The fixing assembly comprises two supporting plates which are vertically connected with the two ends of the third part respectively. The supporting plates are connected with the corresponding extensions at the same time. The side of the two extensions which are away from each other is provided with a mounting groove penetrating through the second side of the backboard. One end of the cartilage gasket is embedded in the mounting groove, and the other end is arranged on the corresponding supporting plate.

[0021] In an embodiment, the cartilage spacer comprises a spacer body on the supporting plate and a connecting end connected to one end of the spacer body, the connecting end is matched with the mounting groove, and the spacer bodies of different cartilage spacers are different in size.

[0022] Based on the disclosure of the above embodiments, it can be known that the cartilage spacer has the beneficial effects of the bone cutting positioning device for guiding bone cutting in knee joint surgery, which has a simple structure and is not easy to be damaged, and the use convenience during operation can be significantly improved through the improvement of the angle block and its assembly mode, the cartilage spacer and its assembly mode, the operation process can be optimized to improve the operation efficiency, and the operation error is not easy to be caused. In addition, since the angle block is a disposable device and supports personalized configuration, the medical inventory cost can be saved, the storage demand for the angle block is reduced, the utilization efficiency of medical resources is improved, and more efficient and economical medical services are provided for patients. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic view of the bone cutting positioning device in the embodiment of the present application.

[0024] Figure 2 FIG. 2 is a partial structural schematic view of the bone cutting positioning device in the embodiment of the present application.

[0025] Figure 3 FIG. 3 is another partial structural schematic view of the bone cutting positioning device in the embodiment of the present application.

[0026] Reference signs:

[0027] 1-back plate; 2-mounting position; 3-cartilage spacer; 4-angle block; 5-positioning hole; 6-connecting piece; 7-first connecting block; 8-second connecting block; 9-supporting plate; 10-mounting groove. DETAILED DESCRIPTION

[0028] In the following, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, but not as a limitation of the present application.

[0029] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the following description should not be regarded as limiting, but only as an example of the embodiments. Those skilled in the art will think of other modifications within the scope of the present disclosure.

[0030] The accompanying drawings included in the specification and forming a part thereof illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0031] These and other characteristics of the present application will become apparent from the following description of the preferred forms of the application given, by way of non-limiting example, with reference to the annexed drawings.

[0032] It should also be understood that, although the present application has been described above with reference to certain specific examples, the application is not limited to these, but rather can be practiced with modification and alteration within the scope of the appended claims along with their equivalents.

[0033] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, when properly considered together.

[0034] Specific embodiments of the present disclosure will be described hereinafter with reference to the accompanying drawings; however, it will be understood that the disclosed embodiments are merely examples of the present disclosure, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that can obscure the present disclosure. Therefore, specific structural and functional details disclosed herein are not intended to be limiting, but are merely as a basis for the claims and representative basis for teaching one skilled in the art to employ the present disclosure in substantially any appropriate detailed structure.

[0035] The specification can use phrases such as "in one embodiment", "in another embodiment", "in yet another embodiment", or "in other embodiments", which can refer to one or more of the same or different embodiments under the present disclosure.

[0036] Hereinafter, the embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0037] As shown in Figure 1 , Figure 2 and Figure 3 , the embodiments of the present application provide an osteotomy positioning apparatus, comprising:

[0038] a back plate 1, which is provided with a mounting position 2 for mounting an angle block 4;

[0039] a connecting assembly provided on the back plate 1, for detachably mounting the angle block 4 on the mounting position 2;

[0040] a cartilage gasket assembly comprising a plurality of different cartilage gaskets 3;

[0041] a fixing assembly provided at the bottom of the back plate 1 in a direction perpendicular to the back plate 1, and the cartilage gasket 3 is detachably fixed to the bottom of the back plate 1 through the fixing assembly.

[0042] The bone cutting positioning device provided in the embodiment is mainly used for guiding bone cutting in knee joint surgery, and the bone cutting precision is improved to ensure the recovery of the medial condyle shape of the femur and the function of the medial collateral ligament. The bone cutting positioning device in the embodiment only includes a back plate 1, a connecting assembly, an angle block 4, a cartilage gasket 3 and a fixing assembly, has a simple overall structure, each structural part is easy to manufacture and can be repeatedly used without being easily damaged.

[0043] Further, in the embodiment, the angle block 4 and the assembly mode thereof and the cartilage gasket 3 and the assembly mode thereof are improved to significantly improve the use convenience of the bone cutting positioning device when it is operated, so that the medical personnel can optimize the surgical procedure, thereby improving the surgical efficiency, reducing the surgical operation error and improving the precision.

[0044] Continue to combine Figure 1 , Figure 2 and Figure 3 , the back plate 1 includes a vertical part and a horizontal part matched to form a “king” shape, the vertical part is arranged along the center line of the back plate 1, the horizontal part includes a first part, a second part and a third part, the first part and the third part are located on both sides of the second part, and the vertical part and the horizontal part are integrally formed. In the embodiment, the back plate 1 is arranged in the shape of a king, which is consistent with the anatomical shape of the distal end of the femur in the flexion position after the first bone cutting of the distal end of the femur in the TKA surgery is completed, and facilitates the assembly of the angle block 4. The connecting assembly and the mounting position 2 are located on the second part, and the fixing assembly is located on the third part.

[0045] Specifically, in the embodiment, opposite sides of the angle block 4 are both application sides, that is, both opposite sides of the angle block 4 can be applied. The meanings represented by opposite sides of the angle block 4 are different, which are used to distinguish the bone cutting positioning of the left / right femur.

[0046] In the embodiment, the angle block 4 is a disposable angle block 4, that is, the angle block 4 is a disposable device and supports personalized configuration, so that the medical inventory cost can be saved, the storage demand for the angle block 4 is reduced, the utilization efficiency of medical resources is improved, and more efficient and economical medical services are provided for patients. In addition, the angle block 4 in the embodiment can be made of ABS or medical nylon, but is not limited to this, such as angle positioning of a four-in-one bone cutting plate, so that the bone cutting operation is more accurate and stable. When applied, the two sides of the angle block 4 can be marked, such as L (left) and R (right), which are used to distinguish the medial posterior condyle bone cutting position of the left / right femur, and the angle block 4 can be prepared by 3D printing or injection molding.

[0047] Further, the angle block 4 is provided with a positioning hole 5 penetrating through the angle block 4, and the positioning hole 5 on the medial side of the angle block 4 is used as a reference, and the positioning holes 5 on the two angle blocks 4 have an angle difference, which is used to indicate the internal-external rotation angle of the femur, and the angle difference ranges from 0° to 10°, and the minimum unit includes 0.2°, and the specific angle can be customized before the operation. Different specifications of the angle block 4 are also based on the medial positioning hole 5, and the corresponding angle is determined based on the lateral positioning hole 5, and then the actual required angle (internal-external rotation angle) is matched. In the embodiment, the femoral medial side is used as the shaft center to realize the angle change, which can ensure the accurate value of the posterior medial condyle osteotomy of the femur.

[0048] During the operation, the medical staff can replace the front and back surfaces of the angle block 4 as needed, and the form of replacing the front and back surfaces can be realized on the same positioning device, thereby realizing the positioning and adjustment of the left and right sides of the femur. Thus, it is not only convenient to operate, but also can effectively reduce the medical cost.

[0049] Continue to combine Figure 1 , Figure 2 and Figure 3 As shown, the second part is provided with a mounting hole for forming the mounting position 2 on both sides of the center line of the back plate 1, and the two mounting holes are positionally symmetrical, and the two mounting holes are matched with the outer shape of the corresponding angle block 4, so that at least part of the angle block 4 can be embedded in the hole. In the embodiment, the two angle blocks 4 are connected by a connecting piece 6, and the connecting assembly is limitingly connected with the connecting piece 6, thereby detachably mounting the angle block 4 on the mounting position 2.

[0050] Specifically, the connecting assembly includes a first connecting block 7 and a second connecting block 8 arranged on one side of the back plate 1 provided with the angle block 4 and located inside the connecting piece 6. The first connecting block 7 and the second connecting block 8 are both provided with a positioning rod, and the two positioning rods can be rotated close to each other to extend the corresponding connecting block, and clamp and fix the angle block 4. At this time, the angle block 4 is firmly mounted on the back plate 1, and when the medical staff rotates the positioning rods to move away from each other, the connecting piece 6 can be released, and at this time the medical staff can take the angle block 4 from the back plate 1.

[0051] The two ends of the third part extend outward along a direction perpendicular to the back plate 1 to form an extension. The extension and the fixing assembly are located on the first side of the back plate 1, and the connecting assembly is arranged on the second side of the back plate 1. The fixing assembly comprises two supporting plates 9 which are vertically connected to the two ends of the third part, and the supporting plates 9 are connected to the corresponding extensions. The two extensions are provided with mounting grooves 10 which penetrate through the second side of the back plate 1, and the soft cartilage pad 3 can be connected to the fixing assembly from the medial and lateral sides of the femur. When the soft cartilage pad 3 is assembled, one end of the soft cartilage pad 3 is embedded in the mounting groove 10, and the other end is arranged on the corresponding supporting plate 9.

[0052] Continuously combining Figure 2 and Figure 3 As shown in the drawings, the soft cartilage pad 3 comprises a pad body arranged on the supporting plate 9 and a connecting end connected to one end of the pad body, and the connecting end is matched with the mounting groove 10. The pad bodies of different soft cartilage pads 3 are different in size. Specifically, the pad bodies of different soft cartilage pads 3 in the embodiment are different in thickness. During the operation, medical personnel can select the soft cartilage pad 3 with a suitable thickness according to the actual situation to achieve cartilage compensation, thereby solving the problem of inaccurate osteotomy caused by cartilage wear. That is, the size of the soft cartilage pad 3 can be adjusted to compensate for the wear of the posterior condyle cartilage of the femur, thereby significantly improving the accuracy of the posterior condyle osteotomy of the femur and accurately restoring the original state of the posterior medial condyle joint surface of the femur.

[0053] In actual operation, the appropriate osteotomy angle is determined through preoperative planning, and the matching assembly of the femur positioning adjusting device is completed. After the distal end of the femur is cut, the knee joint is in a flexion position. At this time, the back plate 1 of the osteotomy positioning device is tightly attached to the femur osteotomy surface, and the fixing assembly is tightly attached to the posterior condyle of the femur. According to the degree of cartilage defect of the posterior condyle of the femur, the soft cartilage pad 3 with a suitable thickness is selected and arranged on the fixing assembly. If the selected soft cartilage pad 3 does not completely compensate for the cartilage, it can be taken out of the mounting groove 10, and other soft cartilage pads 3 with appropriate specifications are selected and assembled. After the cartilage compensation is completed, the internal and external rotation angles matched by the angle block 4 are determined again according to the actual situation, and the positioning nail is guided and positioned by passing through the positioning hole 5. The positioning nail is driven into the correct position of the femoral condyle joint surface. Finally, the four-in-one osteotomy plate is placed according to the position of the positioning nail, the osteotomy thickness is confirmed, and the osteotomy operation is performed.

[0054] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements should also be considered to fall within the protection scope of the present application.

Claims

1. An osteotomy positioning instrument, comprising: The application relates to a kind of angle block and soft cartilage pad assembly for femur, which comprises: a back plate, which is provided with mounting positions for mounting angle blocks; a connecting assembly, which is arranged on the back plate and used for detachably mounting the angle blocks on the mounting positions; a soft cartilage pad assembly, which comprises a plurality of different soft cartilage pads; a fixing assembly, which is arranged on the back plate in a direction perpendicular to the back plate, and the soft cartilage pads are detachably fixed on the back plate through the fixing assembly.

2. The osteotomy positioning instrument of claim 1, wherein, The back plate comprises vertical and horizontal parts which form a "king" shape, the vertical part is arranged along the center line of the back plate, the horizontal part comprises a first part, a second part and a third part, the first part and the third part are located on both sides of the second part, the connecting assembly and the mounting positions are located on the second part, and the fixing assembly is located on the third part.

3. The osteotomy positioning instrument of claim 2, wherein, The angle block is provided with a positioning hole penetrating through the angle block, the positioning holes on the two angle blocks have an angle difference based on the positioning hole on the angle block of the femur medial side, the angle difference is used for indicating the internal and external rotation angle of the femur, and the angle difference ranges from 0° to 10°, and the minimum unit comprises 0.2°.

4. The osteotomy positioning instrument of claim 1, wherein, The angle block is a disposable angle block.

5. The osteotomy positioning instrument of claim 2, wherein, The second part is provided with a mounting hole for forming the mounting position on both sides of the center line of the back plate, the two mounting holes are positionally symmetrical, the two mounting holes are matched with the shapes of the corresponding angle blocks, so that at least part of the angle blocks can be embedded in the holes.

6. The osteotomy positioning instrument of claim 5, wherein, The connecting assembly and the connecting piece are limitingly connected, so that the angle blocks are detachably mounted on the mounting positions.

7. The osteotomy positioning instrument of claim 6, wherein, The connecting assembly comprises a first connecting block and a second connecting block which are arranged on one side of the back plate where the angle blocks are arranged and located on both sides of the connecting piece, the first connecting block and the second connecting block are both screw-connected with positioning rods, the two positioning rods can be rotated to approach each other to clamp and fix the angle blocks, or be rotated to move away from each other to release the angle blocks.

8. The osteotomy positioning instrument of claim 2, wherein, The third part is provided with an extension at both ends, the extension and the fixing assembly are located on the first side of the back plate, the connecting assembly is arranged on the second side of the back plate, the fixing assembly comprises two supporting plates which are vertically connected with both ends of the third part, the supporting plates are connected with the corresponding extensions, one side of the two extensions which are away from each other is provided with a mounting groove penetrating through the second side of the back plate, one end of the soft cartilage pad is embedded in the mounting groove, and the other end is arranged on the corresponding supporting plate.

9. The osteotomy positioning instrument of claim 8, wherein, The soft cartilage pad comprises a pad body on the supporting plate and a connecting end connected with one end of the pad body, the connecting end is matched with the mounting groove, and the pad bodies of different soft cartilage pads are different in size.

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