Bone bending knife and bone knife kit for tibial prosthesis revision

Abstract

The utility model provides an osteotome and osteotome suite for tibial prosthesis revision, and the osteotome comprises a first operating rod, a handle and an osteotome head. The first operating rod is provided with a near end and a far end; the bent tool bit is connected to the far end of the first operating rod, the bent tool bit is in a smooth bent shape, the end, in the length direction, of the bent tool bit is connected with the far end of the first operating rod, and first cutting edges are arranged on the end portion of the other end of the bent tool bit and the edge of the inner concave side of the side portion; the handle is movably arranged on the first operating rod in a sleeving mode. According to the bone bending knife disclosed by the embodiment of the utility model, the bending knife head is arranged to be in the smooth bending shape, so that the bone bending knife can better adapt to the shape of the peripheral surface of the side part of the tibial prosthesis, and an operator can conveniently separate the side part of the tibial prosthesis. The first cutting edge located at the front end of the bent tool bit can play a role in vertical guide separation, the movable handle can prevent the handle from entering an incision, and accidental injury to cartilage tissue and sclerotin in the operation process is avoided.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a curved bone scalpel and bone scalpel kit for tibial prosthesis revision. Background Technology

[0002] With the continued increase in the number of joint replacement surgeries, many require tibial prosthesis revision surgery due to problems with the initial replacement components. One of the most challenging steps in revision surgery is the removal of the old tibial prosthesis. Traditional tibial prosthesis removal techniques, especially for cemented or strongly fused tibial prostheses, present difficulties in removal.

[0003] In knee revision surgery, especially when dealing with the tibia, osteotomy is often required to separate the tibial prosthesis from the bone. While a flat, shovel-shaped tip can effectively separate the anterior aspect of the tibial prosthesis, the presence of a central pillar in the prosthesis limits the insertion space and range of the osteotomy. Using a flat, shovel-shaped tip to separate the posterior and lateral aspects of the tibial prosthesis often increases bone and soft tissue damage, affecting patient outcomes and recovery time. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a curved osteotome for tibial prosthesis revision. This curved osteotome has the advantages of improving operational efficiency and reducing bone and soft tissue damage in patients.

[0005] An embodiment of this utility model also proposes a bone scalpel kit for tibial prosthesis revision.

[0006] The tibial prosthesis revision scalpel of this utility model includes a first operating rod, a handle, and a curved blade head. The first operating rod has a proximal end and a distal end, the curved blade head is connected to the distal end of the first operating rod, the curved blade head is smoothly curved, one end of the curved blade head along its length is connected to the distal end of the first operating rod, the other end of the curved blade head has a first cutting edge, and the handle is movably sleeved on the first operating rod.

[0007] The tibial prosthesis revision scalpel of this utility model, by setting the scalpel head to a smooth curved shape, can better adapt to the shape of the lateral circumferential surface of the tibial prosthesis, making it easier for operators to perform separation operations on the side of the tibial prosthesis.

[0008] This device efficiently separates the adhesions between the tibial prosthesis and the lateral aspect of the tibia. The other end of the curved blade has a first cutting edge, located on the front side, which provides vertical guidance during separation, preventing accidental damage to cartilage and bone during surgery. This improves the convenience of the surgical procedure.

[0009] The tibial prosthesis revision curved bone scalpel of this utility model increases the ease of operation by movably mounting the handle on the first operating rod. When striking, the handle remains stationary, and the first operating rod moves toward the inside of the body under the strike, preventing the handle from entering the incision and causing ligament damage.

[0010] Therefore, the tibial prosthesis revision curved bone cutter of this utility model has the advantages of improving operation efficiency and reducing bone and soft tissue damage to patients.

[0011] In some embodiments, the scimitar head includes a rod section and a cutting edge section connected together, the rod section being connected to the distal end of the first operating lever, and the first cutting edge being disposed at the front end of the cutting edge section and the side edge of the cutting edge section.

[0012] In some embodiments, the blade segment is provided with a protective platform that protrudes outward along its thickness direction, and the protective platform is disposed opposite to the first cutting edge on the side of the blade segment in the transverse direction.

[0013] In some embodiments, the outer contour of the side portion of the blade segment is arc-shaped.

[0014] In some embodiments, the arc length of the curved head is 50mm-90mm.

[0015] In some embodiments, the arc length of the blade segment is 10mm-30mm.

[0016] In some embodiments, the arc length of the cutting edge segment is 20%-40% of the arc length of the curved blade head.

[0017] In some embodiments, the proximal end of the first operating lever has a striking point.

[0018] In some embodiments, the handle has a gripping groove.

[0019] In some embodiments, the tibial prosthesis revision scalpel further includes a limiting rod, the first operating rod has a groove extending along the length of the first operating rod, the handle is sleeved on the area of ​​the first operating rod having the groove, the limiting rod passes through the handle and protrudes out of the handle relative to the handle, and the limiting rod slides within the groove.

[0020] The tibial prosthesis revision bone scalpel kit of this utility model includes a hook bone scalpel, a folding bone scalpel, and a curved bone scalpel according to any one of the above. The hook bone scalpel is used to separate the tibial prosthesis and the posterior side of the tibia, the folding bone scalpel is used to separate the tibial prosthesis and the anterior side of the tibia, and the curved bone scalpel is used to separate the tibial prosthesis and the lateral side of the tibia.

[0021] In some embodiments, the hook knife includes a second operating lever and a curved blade head, the cutting edge of which is disposed at the free end of the curved blade head, and the distance between the curved blade head and the second operating lever is 7mm-15mm.

[0022] In some embodiments, the folding bone scalpel includes a third operating lever and a folding blade head. The folding blade head includes a main body segment, a connecting segment, and a blade body segment that are bent in sequence. The main body segment is connected to the third operating lever, and the front end of the blade body segment has a second cutting edge, which is a single-edged blade.

[0023] In some embodiments, the number of the scalpels is two, and the curved blades of the two scalpels are arranged opposite each other along the side of the tibial prosthesis.

[0024] In some embodiments, the main body rod segment and the third operating rod are arranged collinearly, and the blade segment is arranged parallel to the main body rod segment to form an observation line area, and the distance between the blade segment and the main body rod segment is 20mm-40mm. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the combination of the curved bone cutter, tibia, and tibia prosthesis in an embodiment of this utility model.

[0026] Figure 2 This is a side view of the curved bone knife according to an embodiment of the present invention.

[0027] Figure 3 yes Figure 2 A sectional view along line AA.

[0028] Figure 4 This is a front view of the curved bone knife according to an embodiment of this utility model.

[0029] Figure 5 This is a schematic diagram of the combination of the hook knife, tibia, and tibia prosthesis in an embodiment of this utility model.

[0030] Figure 6 This is a front view of the hook bone knife according to an embodiment of this utility model.

[0031] Figure 7 This is a schematic diagram of the combination of the folding bone cutter, tibia, and tibia prosthesis in an embodiment of this utility model.

[0032] Figure 8 This is a front view of the folding bone knife according to an embodiment of this utility model.

[0033] Figure 9 This is a top view of the folding bone knife according to an embodiment of this utility model.

[0034] Figure label:

[0035] Curved bone scalpel 100; Hook bone scalpel 200; Folding bone scalpel 300; Tibia 400; Tibia prosthesis 500;

[0036] First operating lever 1; Proximal end 11; Distal end 12; Slide groove 13;

[0037] 2. Curved head; 21. Rod body; 22. Cutting edge; 221. First cutting edge; 222. Protective platform;

[0038] Handle 3; Grip groove 31;

[0039] Limit rod 4;

[0040] Second operating lever 5;

[0041] 6-point hook cutter head;

[0042] Third operating lever 7;

[0043] Folded cutter head 8; main body rod segment 81; connecting segment 82; cutter body segment 83. Detailed Implementation

[0044] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0045] The following is for reference. Figures 1-9 This invention describes a curved bone cutter 100 and a bone cutter kit for tibial prosthesis revision according to an embodiment of the present invention.

[0046] The tibial prosthesis revision curved scalpel 100 of this utility model includes a first operating lever 1, a curved scalpel head 2, and a handle 3.

[0047] The first operating lever 1 has a proximal end 11 and a distal end 12. A curved head 2 is connected to the distal end 12 of the first operating lever 1. The curved head 2 is smoothly curved. One end of the curved head 2 along its length direction is connected to the distal end 12 of the first operating lever 1. The other end of the curved head 2 has a first cutting blade 221. The handle 3 is movably sleeved on the first operating lever 1.

[0048] The tibial prosthesis revision scalpel 100 of this embodiment features a smoothly curved scalpel head 2 with a first cutting edge 221 at the other end. This design better adapts to the shape of the circumferential surface of the tibial prosthesis 500, preventing accidental damage to cartilage and bone during surgery. The first cutting edge 221, located on the anterior side, provides vertical guidance for separation. This enhances the convenience of the surgical procedure.

[0049] In addition, the smooth, curved blade head 2 is designed to adapt to the curvature of the side of the tibial prosthesis 500, making it easier for operators to perform separation operations on the side of the tibial prosthesis 500. This efficiently separates the adhesions between the tibial prosthesis 500 and the tibia 400, facilitating the separation process, saving surgical time and improving work efficiency.

[0050] The tibial prosthesis revision curved bone scalpel 100 of this utility model increases the convenience of operation by movably mounting the handle 3 onto the first operating rod 1. When striking, the handle remains stationary, and the first operating rod 1 will move towards the inside of the body under the strike, preventing the handle 3 from entering the incision and causing ligament damage.

[0051] Therefore, the tibial prosthesis revision curved bone cutter 100 of this utility model has the advantages of improving operation efficiency and reducing bone and soft tissue damage to patients.

[0052] Optionally, the first operating lever 1 and the curved head 2 can be integrally formed.

[0053] like Figures 1 to 4 As shown, the curved head 2 includes a rod section 21 and a cutting edge section 22 connected together. The rod section 21 is connected to the distal end 12 of the first operating lever 1. The first cutting edge 221 is disposed at the front end of the cutting edge section 22 and at the side edge of the cutting edge section 22. It can be understood that the first cutting edge 221 at the side edge is also smoothly curved.

[0054] The tibial prosthesis revision scalpel 100 of this utility model can effectively separate the original bone and the tibial prosthesis 500 through the first cutting edge 221 on the side. The first cutting edge 221 on the side and the first cutting edge 221 at the end can cooperate with each other. After the first cutting edge 221 at the end cuts, there may still be some adhesion. The first cutting edge 221 on the side can then cut it. Therefore, the disassembly effect can be further improved.

[0055] Furthermore, the tibial prosthesis revision scalpel 100 of this embodiment, by dividing the scalpel head 2 into a connected shaft section 21 and a blade section 22, avoids distributing the first cutting edge 221 on the entire side of the scalpel head 2, which could easily injure surrounding tissues during operation. Therefore, placing the first cutting edge 221 on a portion of the scalpel head 2 has the advantage of further reducing bone and soft tissue damage to the patient.

[0056] like Figures 1 to 4 As shown, the blade section 22 is provided with a protective platform 222 that protrudes outward along its thickness direction. The protective platform 222 is positioned opposite to the first cutting edge 221 on the side in the transverse direction of the blade section 22.

[0057] The tibial prosthesis revision scalpel 100 of this embodiment features a protective platform 222 on one side of the blade section 22 in the thickness direction. This platform forms a protective surface on at least one side of the blade section 22 in the thickness direction. This structural design allows the protective platform 222 to better separate the first cutting edge 221 from other tissues, preventing the first cutting edge 221 from being closely connected to bone tissue or coming into contact with other tissues, thereby reducing damage to tissues closely connected to or adjacent to bone tissue. Therefore, the tibial prosthesis revision scalpel 100 of this embodiment further reduces patient pain.

[0058] Specifically, the protective platform 222 and the first cutting blade 221 on the side are arranged opposite each other in the width direction of the curved head 2.

[0059] Optionally, the shape of the outer periphery of the protective platform 222 is approximately consistent with the curvature of the first cutting edge 221 on the side. This ensures good fit between the protective platform and the side of the tibia 400, further preventing damage to surrounding tissues by the protective platform 222.

[0060] Furthermore, the protective platform 222 and the cutting edge 22 are integrally formed. This integrally formed structure avoids gaps between the first cutting edge 221 and the protective platform 222, thereby preventing bone tissue or other adjacent tissues from entering the gaps during surgery and reducing surgical risks during the separation process. In addition, the integrally formed curved blade head 2 is easy to clean and disinfect, ensuring the safety of reusing the curved bone scalpel 100.

[0061] Furthermore, the front end of the protective table 222 is blunt. This allows for the safe separation and protection of other tissues that are closely connected to or near the bone, preventing damage to other tissues during the procedure.

[0062] like Figures 1 to 4 As shown, the outer contour of the side of the blade section 22 is set in an arc shape.

[0063] The tibial prosthesis revision scalpel 100 of this utility model has an arc-shaped outer contour of the side of the scalpel head 2, which can adapt to the arc shape of the side of the tibial prosthesis 500 and avoid the generation of sharp corners. This not only helps the protective platform 222 to protect other tissues that are closely connected to or very close to the bone tissue, but also makes it easier for the operator to operate.

[0064] The arc length of the curved head 2 is 50mm-90mm; the arc length of the blade section 22 is 10mm-30mm; the arc length of the blade section 22 is 20%-40% of the arc length of the curved head 2. This avoids the problem of interference with surrounding tissues caused by excessive length, and also avoids the problem of insufficient insertion depth for tibial prosthesis removal due to insufficient length, leading to high removal difficulty.

[0065] Optionally, the arc length of the scimitar head 2 is 50mm, 52mm, 54mm, 56mm, 58mm, 60mm, 62mm, 64mm, 66mm, 68mm, 70mm, 72mm, 74mm, 76mm, 78mm, 80mm, 82mm, 84mm, 86mm, 88mm, or 90mm.

[0066] Optionally, the arc length of the blade segment 22 is 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm or 30mm.

[0067] like Figures 1 to 4 As shown, the proximal end 11 of the first operating lever 1 has a tapping point. Understandably, the tapping point is positioned towards the surgical operator.

[0068] The tibial prosthesis revision scalpel 100 of this utility model has a striking point (rear) located near the proximal end of the first operating lever 1, i.e., the striking point is positioned facing the surgeon, which facilitates separation operations. Therefore, the scalpel 100 has the advantage of ease of operation.

[0069] The handle 3 has a grip groove 31. The handle 3 is ergonomically designed, non-slip, and suitable for long-term operation without causing hand fatigue.

[0070] like Figures 1 to 4 As shown, the tibial prosthesis revision scalpel 100 of this embodiment further includes a limiting rod 4. A groove 13 is provided on the first operating rod 1 along its length. A handle 3 is sleeved on the area of ​​the first operating rod 1 with the groove 13. The limiting rod 4 passes through the handle 3 and protrudes beyond it, and slides within the groove 13. Therefore, the tibial prosthesis revision scalpel 100 of this embodiment has the advantage of simple structure.

[0071] The tibial prosthesis revision bone scalpel kit of this utility model includes a hook bone scalpel 200, a folding bone scalpel 300, and a curved bone scalpel 100 for tibial prosthesis revision according to any one of the above. The hook bone scalpel 200 is used to separate the posterior side of the tibial prosthesis 500 and the tibia 400, the folding bone scalpel 300 is used to separate the anterior side of the tibial prosthesis 500 and the tibia 400, and the curved bone scalpel 100 is used to separate the lateral side of the tibial prosthesis 500 and the tibia 400.

[0072] The tibial prosthesis revision bone scalpel kit of this utility model, by dividing the tibial prosthesis revision bone scalpel kit into a hook bone scalpel 200, a folding bone scalpel 300, and a curved bone scalpel 100 according to any one of the above, can disassemble different parts of the tibial prosthesis 500. Therefore, this revision bone scalpel kit greatly improves the disassembly efficiency of the tibial prosthesis 500.

[0073] There are two curved bone cutters 100, and the curved blades 2 of the two curved bone cutters 100 are arranged opposite each other along the side of the tibial prosthesis.

[0074] Specifically, the first cutting edges 221 of the two curved bone cutters 100 are positioned opposite each other along the sides of the tibial prosthesis 500.

[0075] Optionally, the two curved blades 2 are mirrored along the sides of the tibial prosthesis 500.

[0076] like Figures 5 to 6 As shown, the hook knife 200 includes a second operating lever 5 and a curved hook head 6. The cutting edge of the curved hook head 6 is located at the end of the curved hook head 6, and the distance between the curved hook head 6 and the second operating lever 5 is 7mm-15mm.

[0077] The tibial prosthesis revision bone scalpel kit of this utility model divides the hook bone scalpel 200 into a second operating rod 5 and a curved hook scalpel head 6, which are used to separate the posterior side of the tibia 400 and the tibial prosthesis 500. The hook bone scalpel 200 facilitates the fixation and precise separation of the posterior side of the tibial prosthesis 500.

[0078] Optionally, the distance between the hook cutter head 6 and the second operating lever 5 is 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm or 17mm.

[0079] During the procedure, the curved blade 6 is tapped by the rear extractor until the tibia 400 and the tibial prosthesis 500 are separated. This device is easy to use, avoids damage to the tibial bone and the ligaments on both sides, reduces the operation time, and avoids damage to the tibial bone and the ligaments on both sides.

[0080] like Figure 7 and Figure 9 As shown, the folding bone scalpel 300 includes a third operating lever 7 and a folding blade head 8. The folding blade head 8 includes a main body rod segment 81, a connecting segment 82, and a blade body segment 83, which are bent in sequence. The main body rod segment 81 is connected to the third operating lever 7. The front end of the blade body segment 83 has a second cutting edge, which is a single blade.

[0081] The tibial prosthesis revision bone scalpel kit of this utility model divides the folded bone scalpel 300 into a third operating rod 7 and a folded blade head 8. The folded blade head 8 is further divided into a main rod segment 81, a connecting segment 82, and a blade body segment 83, which are bent in sequence. The folded blade head 8 is designed to be easy to separate, ensuring the surgical field of vision.

[0082] like Figure 7 and Figure 9 As shown, the main body segment 81 of the folding blade head 8 is collinear with the third operating lever 7, and the blade body segment 83 is parallel to the main body segment 81 to form an observation field of view, which can ensure the surgical field of view as large as possible.

[0083] Optionally, the distance between the cutter body section 83 and the main body rod section 81 is 20mm-40mm.

[0084] Optionally, the distance between the cutter body section 83 and the main body rod section 81 is 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm or 40mm.

[0085] The steps involved in revision surgery include:

[0086] (1) The surgical area was routinely disinfected and covered with sterile surgical drapes;

[0087] (2) Using a folding osteotome 300, start along the anterior side of the tibial prosthesis 500 and gently separate the tibial prosthesis 500 from the flexible interface.

[0088] (3) Based on the surgery and the tibial prosthesis 500, select the curved bone knife 100 to make a deeper or more angular cut on the side of the tibial prosthesis 500.

[0089] (4) For the tightly adhered parts on the back, use the hook knife 200 to tap the rear striking surface of the second operating lever 5 to help separate them.

[0090] (5) Adjust the blade type or surgical strategy as needed to ensure efficient operation.

[0091] (6) After all separations are completed, inspect the surgical area to ensure there are no remaining fragments or excessive damage. Thoroughly clean and suture the surgical area.

[0092] Therefore, the combined use of different types of cutting tools can not only improve surgical efficiency but also greatly reduce surgical risks and optimize postoperative recovery.

[0093] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0094] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0095] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0096] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0097] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0098] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A curved osteotome for tibial prosthesis revision, characterized in that, include: A first operating lever, the first operating lever having a proximal end and a distal end; A curved cutter head, connected to the distal end of the first operating lever, the curved cutter head being smoothly curved, one end of the curved cutter head along its length direction being connected to the distal end of the first operating lever, and the other end of the curved cutter head having a first cutting edge; and A handle, which is movably fitted onto the first operating lever.

2. The tibial resurfacing scalpel according to claim 1, characterized in that, The curved head includes a rod section and a cutting edge section connected together. The rod section is connected to the distal end of the first operating lever, and the first cutting edge is disposed at the front end of the cutting edge section and the side edge of the cutting edge section.

3. The tibial prosthesis revision scalpel according to claim 2, characterized in that, The blade section is provided with a protective platform that protrudes outward along its thickness direction, and the protective platform is arranged opposite to the first cutting edge on the side in the transverse direction of the blade section.

4. The tibial prosthesis revision scalpel according to claim 2, characterized in that, The outer contour of the side of the blade section is arc-shaped.

5. The curved bone knife according to claim 4, characterized in that, The arc length of the curved head is 50mm-90mm; and / or, the arc length of the cutting edge is 10mm-30mm; and / or, the arc length of the cutting edge is 20%-40% of the arc length of the curved head.

6. The tibial resurfacing scalpel according to claim 1, characterized in that, The proximal end of the first operating lever has a striking point.

7. The tibial resurfacing scalpel according to claim 1, characterized in that, The handle has gripping grooves; And / or, it also includes a limiting rod, the first operating rod having a groove extending along the length of the first operating rod, the handle being sleeved on the area of ​​the first operating rod having the groove, the limiting rod passing through the handle and protruding out of the handle relative to the handle, and the limiting rod slidingly engaging within the groove.

8. A set of bone scalpels for tibial prosthesis revision, characterized in that, The invention includes a hooked bone scalpel, a folding bone scalpel, and a curved bone scalpel according to any one of claims 1-7, wherein the hooked bone scalpel is used to separate the tibial prosthesis and the posterior side of the tibia, the folding bone scalpel is used to separate the tibial prosthesis and the anterior side of the tibia, and the curved bone scalpel is used to separate the tibial prosthesis and the lateral side of the tibia.

9. The tibial prosthesis revision bone scalpel kit according to claim 8, characterized in that, The hook knife includes a second operating lever and a curved hook head. The cutting edge of the curved hook head is located at the front end of the curved hook head, and the distance between the curved hook head and the second operating lever is 7mm-15mm. And / or, the folding bone scalpel includes a third operating lever and a folding blade head. The folding blade head includes a main body rod segment, a connecting segment, and a blade body segment that are bent in sequence. The main body rod segment is connected to the third operating lever. The front end of the blade body segment has a second cutting edge, which is a single-edged blade. And / or, the number of the scalpels is two, and the scalpel heads of the two scalpels are arranged opposite each other along the side of the tibial prosthesis.

10. The tibial prosthesis revision bone scalpel kit according to claim 9, characterized in that, The main body rod segment and the third operating rod are arranged colinearly, and the blade segment is arranged parallel to the main body rod segment to form an observation line of sight area. The distance between the blade segment and the main body rod segment is 20mm-40mm.

Images