Total knee replacement digital osteotomy guide plate

Abstract

The utility model discloses a total knee replacement digital osteotomy guide plate which comprises a connecting rod, a fixing plate is welded to one side of the connecting rod, a positioning plate matched with a knee joint is welded to one end of the fixing plate, receding grooves are formed in the middle of the fixing plate and the middle of the positioning plate, guide plates are arranged at the two ends of the connecting rod, and the connecting rod is connected with the connecting rod. According to the utility model, through the arrangement of the two guide plates, the saw blade penetrates through the guide grooves of the two guide plates, so that the saw blade is guided, the saw blade can be prevented from inclining in the cutting process, the success rate of an operation is further improved, and through the arrangement of the locking assembly, the saw blade can be prevented from inclining in the cutting process. The guide plate can be repeatedly used and replaced, the repeated utilization rate of the device is improved, and the fixing effect of guide plate installation can be improved through rotation of the limiting assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of medical supplies, in particular to a digital bone cutting guide plate for total knee replacement. Background Art

[0002] The knee joint is an important weight-bearing joint of the lower limbs. Its structure and function are the most complex among the joints in the human body. In knee replacement surgery, a bone cutting guide is used.

[0003] After searching, it was found that a proximal tibial bone cutting guide device for total knee replacement is disclosed with announcement number CN213606664U. The saw blade of the oscillating saw can move from the medial condyle to the lateral condyle under the guidance of the second guide groove of the second guide plate to completely cut the bone, thereby avoiding the saw blade from being obstructed by the positioning plate. However, it is a one-way guide, and during the cutting process, the saw blade is prone to tilt, resulting in a tilted cut surface, making the customized knee joint unusable. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a digital bone cutting guide for total knee replacement.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A digital bone cutting guide for total knee replacement includes a connecting rod, a fixing plate is welded on one side of the connecting rod, a positioning plate matching the knee joint is welded on one end of the fixing plate, avoidance grooves are provided in the middle parts of the fixing plate and the positioning plate, guide plates are provided at both ends of the connecting rod, and the guide plates and the connecting rod are fixed by a locking assembly, guide grooves penetrating the guide plates are provided on one side of the two guide plates, and the height of the guide grooves is not higher than the height of the avoidance grooves.

[0007] As a further solution of the utility model, the locking assembly includes an internal threaded tube, which is welded to one end of the guide plate, a through hole is opened on one side of the connecting rod, and the internal threaded tube is inserted into the through hole, the internal thread of the internal threaded tube is connected to a fixing part, and a limit assembly for limiting the position of the guide plate is provided between the guide plate and the connecting rod.

[0008] As a further solution of the utility model, the limit assembly includes two limit plates and two limit grooves. The two limit plates are respectively welded to one end of the two guide plates, and the two limit grooves are respectively opened at both ends of the connecting rod, and the limit plates are inserted into the limit grooves.

[0009] As a further solution of the utility model, two rubber pads are bonded to one side of the connecting rod, and the fixing piece passes through the rubber pads and contacts the rubber pads.

[0010] As a further solution of the utility model, a plurality of positioning holes are opened on one side of the positioning plate, a plurality of support plates are welded to one side of the positioning plate, and the support plates are fixed to the fixing plates.

[0011] As a further solution of the utility model, two inclined grooves are provided on one side of the two guide plates, and the two inclined grooves are communicated with the guide groove.

[0012] As a further solution of the utility model, the fixing piece is a hexagon socket head screw.

[0013] As a further solution of the utility model, the fixing piece is a hexagon socket countersunk screw.

[0014] As a further solution of the utility model, at least one ash passing hole is provided on both the upper and lower sides of the fixing plate.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model provides two guide plates, and the saw blade passes through the guide grooves of the two guide plates, thereby guiding the saw blade, which can prevent the saw blade from tilting during the cutting process, thereby improving the success rate of the operation.

[0017] 2. The utility model inserts the internal threaded tube into the through hole through the setting of the locking assembly, and then uses the fixing piece to fix the internal threaded tube and the connecting rod, thereby completing the fixation of the guide plate, so that the guide plate can be reused and replaced, thereby improving the reuse rate of the device.

[0018] 3. The utility model sets a limit assembly, and the limit plate is inserted into the limit groove, so that the guide plate is limited by the limit plate, the limit groove, the internal threaded tube and the through hole, so that the guide plate cannot rotate, thereby improving the fixing effect of the guide plate installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the upper three-dimensional structure of a digital bone cutting guide for total knee replacement proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the lower three-dimensional structure of a digital bone cutting guide for total knee replacement proposed by the utility model;

[0021] Figure 3 The utility model is a partial cross-sectional structural schematic diagram of a digital bone cutting guide for total knee replacement.

[0022] In the figure: 1. guide plate; 2. guide groove; 3. inclined groove; 4. connecting rod; 5. fixing plate; 6. supporting plate; 7. positioning plate; 8. avoidance groove; 9. ash passing hole; 10. positioning hole; 11. limiting plate; 12. limiting groove; 13. through hole; 14. fixing piece; 15. rubber pad; 16. internal threaded pipe. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0024] Reference Figure 1-Figure 3 A digital bone cutting guide for total knee replacement includes a connecting rod 4, a fixing plate 5 is welded on one side of the connecting rod 4, at least one ash hole 9 is opened on the upper and lower sides of the fixing plate 5, so that the debris generated during the cutting process can flow out from the ash hole 9, thereby clearing the debris generated during the cutting process to prevent the debris from interfering with the cutting, a positioning plate 7 matching the knee joint is welded on one end of the fixing plate 5, and a avoiding groove 8 is opened in the middle part of the fixing plate 5 and the positioning plate 7, and a plurality of positioning holes 10 are opened on one side of the positioning plate 7, which can fix the positioning plate 7 to the knee joint, a plurality of supporting plates 6 are welded on one side of the positioning plate 7, and the supporting plate 6 is fixed to the fixing plate 5, so as to strengthen the connection between the positioning plate 7 and the fixing plate 5, so that the connection between the fixing plate 5 and the positioning plate 7 is more stable, and the two ends of the connecting rod 4 A guide plate 1 is provided on each of the two guide plates 1, and the guide plate 1 is fixed to the connecting rod 4 by a locking assembly. A guide groove 2 penetrating the guide plate 1 is provided on one side of the two guide plates 1, and the height of the guide groove 2 is not higher than the height of the avoidance groove 8. Two oblique grooves 3 are provided on one side of the two guide plates 1, and the two oblique grooves 3 are connected with the guide groove 2 to guide the saw blade so that the saw blade can easily enter the guide groove 2. When in use, the positioning plate 7 is fixed to the knee joint that needs surgery, and then the saw blade is passed through the guide groove 2 of the two guide plates 1, and then cutting is performed. During the cutting process, the saw blade will enter the avoidance groove 8, thereby completely cutting the knee joint. In addition, since there are two guide grooves 2 to guide the saw blade, the saw blade can be prevented from tilting during the cutting process, thereby improving the success rate of the operation.

[0025] In the utility model, the locking assembly includes an internal threaded tube 16, which is welded to one end of the guide plate 1, a through hole 13 is opened on one side of the connecting rod 4, and the internal threaded tube 16 is inserted into the through hole 13, and the internal threaded tube 16 is connected with a fixing member 14 through the internal thread, and the fixing member 14 is preferably a hexagon socket head screw and a hexagon socket countersunk screw, and two rubber pads 15 are bonded to one side of the connecting rod 4, and the fixing member 14 passes through the rubber pad 15 and contacts the rubber pad 15 to prevent the fixing member 14 from rotating with the internal threaded tube 16 during the cutting process, thereby loosening the fixation of the guide plate 1, and a limiting assembly for limiting the position of the guide plate 1 is provided between the guide plate 1 and the connecting rod 4. Before use, the internal threaded tube 16 is inserted into the through hole 13, and then the fixing member 14 is used to fix the internal threaded tube 16 and the connecting rod 4, thereby completing the fixation of the guide plate 1, so that the guide plate 1 can be reused and replaced, thereby improving the reuse rate of the device.

[0026] Among them, the limiting assembly includes two limiting plates 11 and two limiting grooves 12. The two limiting plates 11 are respectively welded at one end of the two guide plates 1. The two limiting grooves 12 are respectively opened at the two ends of the connecting rod 4, and the limiting plates 11 are inserted into the limiting grooves 12. During the assembly process of the guide plate 1, the limiting plate 11 is inserted into the limiting groove 12, so that the guide plate 1 is restricted by the limiting plate 11 and the limiting groove 12 and the internal threaded tube 16 and the through hole 13, so that the guide plate 1 cannot rotate, thereby improving the fixing effect of the installation of the guide plate 1.

[0027] Working principle: When in use, fix the positioning plate 7 to the knee joint that needs surgery, then pass the saw blade through the guide groove 2 of the two guide plates 1, and then cut. During the cutting process, the saw blade will enter the avoidance groove 8, thereby completely cutting the knee joint, and because there are two guide grooves 2 to guide the saw blade, it can prevent the saw blade from tilting during the cutting process, thereby improving the success rate of the operation.

[0028] Finally, it should be noted that: for those skilled in the art, they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this utility model shall be included in the protection scope of this utility model.

Claims

1. A digital bone cutting guide for total knee replacement, comprising a connecting rod (4), characterized in that: A fixing plate (5) is fixedly connected to one side of the connecting rod (4), and a positioning plate (7) matching the knee joint is fixedly connected to one end of the fixing plate (5). Avoidance grooves (8) are provided in the middle of the fixing plate (5) and the positioning plate (7). Guide plates (1) are provided at both ends of the connecting rod (4), and the guide plates (1) and the connecting rod (4) are fixed to each other via a locking assembly. A guide groove (2) penetrating the guide plates (1) is provided on one side of the two guide plates (1), and the height of the guide groove (2) is not higher than the height of the avoidance groove (8).

2. A digital bone cutting guide for total knee replacement according to claim 1, characterized in that: The locking assembly comprises an internal threaded tube (16), the internal threaded tube (16) being fixedly connected to one end of the guide plate (1), a through hole (13) being provided on one side of the connecting rod (4), and the internal threaded tube (16) being inserted into the through hole (13), the internal thread of the internal threaded tube (16) being connected to a fixing member (14), and a limit assembly for limiting the position of the guide plate (1) being provided between the guide plate (1) and the connecting rod (4).

3. A digital bone cutting guide for total knee replacement according to claim 2, characterized in that: The limiting assembly comprises two limiting plates (11) and two limiting grooves (12); the two limiting plates (11) are respectively fixedly connected to one end of the two guide plates (1); the two limiting grooves (12) are respectively arranged at the two ends of the connecting rod (4); and the limiting plates (11) are inserted into the limiting grooves (12).

4. A digital bone cutting guide for total knee replacement according to claim 2, characterized in that: Two rubber pads (15) are fixedly connected to one side of the connecting rod (4), and the fixing piece (14) passes through the rubber pad (15) and contacts the rubber pad (15).

5. The digital bone cutting guide for total knee replacement according to claim 1, characterized in that: A plurality of positioning holes (10) are provided on one side of the positioning plate (7), a plurality of support plates (6) are fixedly connected to one side of the positioning plate (7), and the support plates (6) are fixed to the fixing plate (5).

6. A digital bone cutting guide for total knee replacement according to claim 1, characterized in that: Two inclined grooves (3) are provided on one side of the two guide plates (1), and the two inclined grooves (3) are connected to the guide groove (2).

7. A digital bone cutting guide for total knee replacement according to claim 2, characterized in that: The fixing member (14) is a hexagon socket head screw.

8. The digital bone cutting guide for total knee replacement according to claim 2, characterized in that: The fixing member (14) is a hexagon socket countersunk screw.

9. The digital bone cutting guide for total knee replacement according to claim 5, characterized in that: At least one ash passage hole (9) is provided on both the upper and lower sides of the fixing plate (5).

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