Tibia marrow expanding guide device and tibia marrow expanding method

Abstract

The invention discloses a tibia reaming guiding device and a tibia reaming method, the tibia reaming guiding device is configured to be connected with a tibia, the tibia is provided with a proximal femur end and a medullary cavity fitting anatomical shaft, the tibia reaming guiding device comprises a connecting body and a guiding body, the connecting body is connected to the proximal femur end, the guiding body is connected to the connecting body, the guiding body is provided with a guiding channel, and the guiding channel is communicated with the connecting body. The central axis of the guide channel is always overlapped with the central axis of a medullary cavity fitting anatomical shaft of the tibia, and the guide channel is arranged to be a drill bit for guiding an external drilling tool. The problem that in the prior art, due to the fact that a standardized positioning device cannot be fully suitable for different patients, it is needed to depend on multiple times of intraoperative fluoroscopy to verify and adjust to ensure that the position of the tibia marrow cavity in the center direction is relatively accurate can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of knee replacement surgery technology, specifically to a tibial reaming guide device and a tibial reaming method. Background Technology

[0002] Distal femoral bone tumor knee replacement surgery is a limb-sparing procedure used to treat malignant or invasive benign bone tumors in the distal femur (the end of the thigh bone near the knee joint). Its core idea is to completely remove the tumor tissue and then replace the removed distal femur portion with a specially designed artificial prosthesis, thus reconstructing knee joint function and avoiding amputation.

[0003] For example, Chinese invention patent CN110811936B, entitled "A Rotating Platform Ball-Hinge Type Artificial Knee Joint Prosthesis and Its Use Method," describes the following steps: First, a tumor in the distal femur and the proximal tibia are removed, and the medullary canal is reamed. The femoral medullary needle and the femoral condyle patch are connected together. After injecting bone cement into the femoral medullary canal, the femoral medullary needle is inserted into the femoral medullary canal. Then, the tibial component and the tibial medullary needle are connected together. After injecting bone cement into the tibial medullary canal, the tibial medullary needle is inserted into the tibial medullary canal. A rotating bushing is placed in the bushing hole of the connecting part, and a tibial pad is placed on the tibial component. The hinge rotating ball is placed in the spherical groove of the rotating bushing through the insertion assembly hole. The femoral component is placed on the tibial pad, and the bushing lock is inserted into the bushing hole of the connecting part. Finally, the femoral condyle patch is fixed to the femoral component with screws. This prosthesis can minimize the amount of bone removed, significantly reduce the rate of aseptic loosening of the prosthesis, prolong the life of the prosthesis, and retain a certain bone reserve for possible revision.

[0004] During the tibial prosthesis fitting procedure, it is necessary to accurately locate the center point of the tibial medullary cavity and ream the medullary cavity from the tibial plateau towards the center to ensure successful implantation of the tibial prosthesis. However, due to the differences in the angle between the tibial plateau surface and the central axis of the tibial medullary cavity among different patients, standardized positioning devices cannot be fully applied to different individuals. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a tibial reaming guide device and a tibial reaming method. This solves the technical problem in the prior art that the standardized positioning device cannot be fully applied to different patients, thus requiring multiple intraoperative fluoroscopy to verify and adjust in order to ensure the relatively accurate positioning of the tibial medullary cavity center.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a tibial reaming guide device configured to connect to the tibia, the tibia having a near-femoral end and a fitting anatomical axis for the medullary canal, comprising: Connector, attached to the proximal femoral end; and A guide body is connected to the connector. The guide body has a guide channel, the central axis of which is always aligned with the central axis of the anatomical fitting axis of the medullary canal of the tibia. The guide channel is configured to guide the drill bit of an external drilling tool.

[0008] In some embodiments, the connector is plate-shaped and detachably connected to the proximal femoral end.

[0009] In some embodiments, the proximal femoral end has a first plateau articular surface, and the connector has a second plateau articular surface formed relative to the first plateau articular surface. The second plateau articular surface is closely fitted to the first plateau articular surface and can partially enclose the first plateau articular surface.

[0010] In some embodiments, the connector has a first through hole, the axis of which coincides with the central axis of the anatomical fitting axis of the medullary cavity of the tibia. The guide is cylindrical and connected to the connector. The guide has a second through hole along its axis to form the guide channel, and the axis of the second through hole coincides with the axis of the first through hole.

[0011] In some embodiments, the connector has at least one support end on the side opposite to the first platform joint surface, and the support end is configured to apply external pressure so that the second platform joint surface of the connector fits tightly against the first platform joint surface.

[0012] In some embodiments, the number of support ends is two, and the two support ends are respectively disposed on both sides of the guide body.

[0013] In some embodiments, the first platform joint surface is further provided with at least one first connecting hole, and the connecting body is provided with a second connecting hole opposite to the first connecting hole. The second connecting hole penetrates the connecting body, and the connecting body is detachably connected to the first connecting hole of the first platform joint surface via the second connecting hole.

[0014] In some embodiments, the number of the second connecting holes is multiple, and the multiple second connecting holes are spaced apart along the circumferential direction of the guide.

[0015] In some embodiments, the tibial reaming guide device further includes a first identifier and a second identifier, the first identifier and the second identifier being respectively connected to the two support ends.

[0016] Secondly, the present invention also provides a method for tibial reaming, using the tibial reaming guide device described in any of the above claims, the specific steps of which are as follows: The morphology of the medullary cavity was reconstructed by acquiring the patient's CT data and performing three-dimensional modeling based on the CT data to reconstruct the morphology of the tibial medullary cavity. Determine the central axis, and determine the central axis of the tibial medullary cavity; The guide device is designed based on the surface anatomical features of the patient's tibial plateau. A connector that fits into the articular surface of the first plateau is designed, and the outer diameter, inner diameter, and height of the guide are determined according to the central axis of the tibial medullary cavity. Install the guide device, and fit the second platform articular surface of the connector tightly with the first platform articular surface according to the first and second marks, and connect the connector to the proximal femoral end of the tibia; Tibial reaming involves using drilling equipment to ream the tibia along the guide channel of a guide body.

[0017] Compared with existing technologies, the beneficial effects of the tibial medullary reaming guide device and method provided by this invention include: a connector is connected to the proximal femoral end of the tibia, a guide is connected to the connector and has a guide channel, the central axis of which is always aligned with the central axis of the anatomical fitting axis of the tibial medullary cavity, used to guide the drill bit of an external drill bit to perform tibial medullary reaming. Compared with existing technologies, by setting a connector and a guide near the femoral end, the connector connects the guide to the proximal femoral end, and the guide has a guide channel, the central axis of which is always aligned with the central axis of the anatomical fitting axis of the tibial medullary cavity, used to guide the drill bit of an external drill bit to perform medullary reaming on the anatomical fitting axis of the tibial medullary cavity, thereby effectively ensuring the relatively accurate positioning of the tibial medullary cavity center direction. This method is applicable to different patients and solves the technical problem in existing technologies where standardized positioning devices cannot be fully applied to different patients, thus requiring multiple intraoperative fluoroscopy checks and adjustments to ensure the relatively accurate positioning of the tibial medullary cavity center direction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a tibial reamer guide device connected to the tibia, provided in an embodiment of the present invention; Figure 2 This is a schematic diagram from another perspective of a tibial reamer guide device connected to the tibia, provided in one embodiment of the present invention; Figure 3 This is a schematic diagram of the tibia provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of a tibial reamer guide device provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: Tibia 100; proximal femoral end 110; first plateau articular surface 120; connector 200; second plateau articular surface 210; support end 220; first marker 230; second marker 240; second connecting hole 250; guide 300; guide channel 310. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] To address the technical problem that standardized positioning devices are not fully applicable to different patients, necessitating multiple intraoperative fluoroscopy sessions for verification and adjustment to ensure relatively accurate positioning of the tibial medullary canal center, this invention provides a tibial reaming guide device and method. This device utilizes a connector 200 and a guide 300 near the femoral end 110. The connector 200 connects the guide 300 to the femoral end 110. The guide 300 has a guide channel 310, the central axis of which always coincides with the central axis of the tibial medullary canal fitting anatomical axis. This guides the drill bit of an external drill bit to ream the medullary canal along the fitting anatomical axis of the tibial medullary canal, effectively ensuring relatively accurate positioning of the tibial medullary canal center and making it suitable for various patients.

[0022] Please see Figure 1 , Figure 1 , Figure 2 This is a schematic diagram of a tibial reaming guide device and a tibial reaming method according to an embodiment of the present invention. The tibial reaming guide device is configured to connect to the tibia 100, which has a proximal femoral end 110 and a medullary canal fitting anatomical axis. It includes a connector 200 and a guide 300. The connector 200 is connected to the proximal femoral end 110, and the guide 300 is connected to the connector 200. The guide 300 has a guide channel 310, the central axis of which is always coincident with the central axis of the medullary canal fitting anatomical axis of the tibia 100. The guide channel 310 is configured to guide the drill bit of an external drilling tool.

[0023] Compared to existing technologies, this device features a connector 200 and a guide 300 near the femoral end 110. The connector 200 connects the guide 300 to the near femoral end 110. The guide 300 has a guide channel 310, whose central axis always coincides with the central axis of the anatomical fitting axis of the tibia 100 medullary cavity. This guides the external drill bit to ream the medullary cavity on the anatomical fitting axis of the tibia 100, effectively ensuring the relatively accurate positioning of the center of the tibia 100 medullary cavity. This device is suitable for different patients and solves the technical problem in existing technologies where standardized positioning devices are not suitable for different patients, requiring multiple intraoperative fluoroscopy scans for verification and adjustment to ensure the relatively accurate positioning of the center of the tibia 100 medullary cavity.

[0024] Furthermore, the tibia 100 has a fitting anatomical axis proximal to the femoral end 110, distal to the femoral end, and the medullary canal. The fitting anatomical axis of the medullary canal can be obtained by acquiring the patient's CT data in DICOM format. .dcm) continuous tomographic files, with the slice thickness preferably within 1mm; 3D modeling is performed using the patient's CT image data to reconstruct the medullary cavity morphology and determine the central axis of the 100° medullary cavity of the tibia, which will not be elaborated here.

[0025] In this embodiment, as Figure 1 , Figure 2 and Figure 4 As shown, the connector 200 is plate-shaped and detachably connected to the proximal femoral end 110.

[0026] To facilitate user operation and reduce the weight of the guide device, the connector 200 is plate-shaped.

[0027] Furthermore, the connector 200 is detachably connected to the proximal femoral end 110 of the tibia 100, allowing for easy assembly and disassembly.

[0028] In one embodiment, such as Figure 1 , Figure 2 and Figure 4 As shown, the proximal femoral end 110 has a first plateau articular surface 120, and the connector 200 has a second plateau articular surface 210 formed relative to the first plateau articular surface 120. The second plateau articular surface 210 is closely fitted with the first plateau articular surface 120 and can partially wrap around the first plateau articular surface 120.

[0029] The connector 200 has a second plateau articular surface 210 that closely fits the first plateau articular surface 120 near the femoral end 110, which can partially wrap the first plateau articular surface 120 near the femoral end 110, thereby improving the fit between the connector 200 and the near femoral end 110. This allows the connector 200, the guide 300, the near femoral end 110, and the tibia 100 to form an integral whole, effectively ensuring the relatively accurate positioning of the medullary canal center of the tibia 100.

[0030] Furthermore, the first plateau articular surface 120 near the femoral end 110 is designed to match the three-dimensional reconstruction features of the tibial plateau bone tissue 100 and is generated by stretching features such as the plateau articular surface and intercondylar ridge, which will not be elaborated here.

[0031] In some embodiments, the connector 200 can completely or partially cover the first platform articular surface 120 near the femoral end 110, thereby improving the connection stability between the connector 200 and the near femoral end 110.

[0032] In some embodiments, the area of ​​the connector 200 covers only half of the first platform articular surface 120, the guide 300 is connected to one side of the connector 200, and the central axis of the guide channel 310 is always aligned with the central axis of the medullary cavity of the tibia 100, which will not be described in detail here.

[0033] Furthermore, the dimensions of the connector 200 here can be reasonably adjusted according to the specific operational requirements on site, which will not be elaborated here.

[0034] In one embodiment, such as Figure 2 As shown, the connector 200 has a first through hole, the axis of which is aligned with the central axis of the anatomical fitting axis of the medullary cavity of the tibia 100. The guide 300 is cylindrical and connected to the connector 200. The guide 300 has a second through hole along its axis to form a guide channel 310, and the axis of the second through hole is aligned with the axis of the first through hole.

[0035] The guide body 300 is cylindrical, and its axis is set to coincide with the central axis of the anatomical axis of the medullary cavity fitting of the tibia 100. A guide channel 310 is formed by opening a second through hole on the axis of the guide body 300, and the guide body 300 is always set to coincide with the central axis of the anatomical axis of the medullary cavity fitting of the tibia 100.

[0036] Furthermore, the materials of the connector 200 and the guide 300 are common and readily available additive manufacturing materials on the market, which can be printed through additive manufacturing. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0037] In addition, in some embodiments, in order to facilitate the entry of the external drill bit into the tibia 100 along the guide of the second through hole, the inner diameter of the second through hole is 7mm. This can be reasonably adjusted according to the specific application scenario, and will not be elaborated here.

[0038] In one embodiment, such as Figure 1 , Figure 2 As shown, at least one support end 220 is formed on the side of the connector 200 away from the first platform joint surface 120. The support end 220 is configured to apply external pressure so that the second platform joint surface 210 of the connector 200 fits tightly against the first platform joint surface 120.

[0039] By providing at least one support end 220, users can easily fix the connector 200 and guide 300 to the patient's fastener by hand, thereby facilitating the operation of tibial reaming surgery.

[0040] Furthermore, the top plane of the support end 220 is recessed downward relative to the top plane of the connector 200, forming a support end 220 that fits in contact with the human hand or palm, which can improve the operability and convenience during the operation, which will not be elaborated here.

[0041] In one embodiment, such as Figure 1 , Figure 2 As shown, there are two support ends 220, which are respectively set on both sides of the guide body 300.

[0042] To improve stability when using hand support, the guide body 300 has support ends 220 of different sizes on both sides.

[0043] Furthermore, the area and size of the support end 220 can be reasonably adjusted according to the specific usage scenario, which will not be elaborated here.

[0044] In one embodiment, such as Figure 1 , Figure 2 As shown, the tibial reaming guide device also includes a first marker 230 and a second marker 240, which are respectively connected to two support ends 220.

[0045] By setting the first identifier 230 and the second identifier 240, users can make a preliminary judgment on the placement position or angle of the connector 200, replacing the reliance on the surgeon's experience and subjective judgment. This not only shortens the operation time but also reduces the radiation exposure of patients and medical staff.

[0046] Furthermore, the first identifier 230 is "outside" or "outside", and the second identifier 240 is "inside" or "inside", which makes it easier for the surgeon to locate and make a preliminary judgment.

[0047] In addition, in some embodiments, the first identifier 230 and the second identifier 240 may be distinguished by different colors, which will not be elaborated here.

[0048] In addition, in some embodiments, the first identifier 230 and the second identifier 240 may be distinguished by different shape symbols, which will not be elaborated here.

[0049] In one embodiment, such as Figure 1 , Figure 2 As shown, the first platform joint surface 120 is also provided with at least one first connecting hole, and the connecting body 200 is provided with a second connecting hole 250 opposite to the first connecting hole. The second connecting hole 250 passes through the connecting body 200, and the connecting body 200 is detachably connected to the first connecting hole of the first platform joint surface 120 through the second connecting hole 250.

[0050] To improve the connection stability between the connector 200 and the proximal femoral end 110, at least one first connection hole can be provided on the connector 200.

[0051] Furthermore, in order to prevent the connector 200 from shifting relative to the proximal femoral end 110 during the reaming process, a temporary fixation structure can be used to fix the connector 200 to the proximal femoral end 110.

[0052] In some embodiments, the connector 200 can be detachably connected using a commercially available and readily available intramedullary nail, which will not be elaborated here.

[0053] In one embodiment, such as Figure 1 , Figure 2 As shown, there are multiple second connecting holes 250, and the multiple second connecting holes 250 are spaced apart along the circumferential direction of the guide body 300.

[0054] To enhance the connection strength between the connector 200 and the guide 300 and the proximal femoral end 110, a plurality of second connection holes 250 are spaced apart along the circumferential direction of the guide 300, and a plurality of intramedullary nails cooperate with a plurality of second connection holes 250.

[0055] Furthermore, the multiple second connecting holes 250 are arranged in a circular or rectangular array, which will not be described in detail here.

[0056] This application also provides a method for tibial reaming, using a tibial reaming guide device, the specific steps of which are as follows: The morphology of the medullary canal was reconstructed by acquiring the patient's CT data and performing three-dimensional modeling based on the CT data to reconstruct the morphology of the 100mm medullary canal of the tibia. Determine the central axis, specifically the central axis of the 100° medullary canal of the tibia; The guide device is designed based on the surface anatomical features of the patient's tibial plateau. A connector 200 that fits into the articular surface 120 of the first plateau is designed, and the outer diameter, inner diameter and height of the guide 300 are determined according to the central axis of the medullary cavity of the tibial plateau. Install the guide device, and according to the first mark 230 and the second mark 240, tightly fit the second platform joint surface 210 of the connector 200 with the first platform joint surface 120, and connect the connector 200 to the proximal femoral end 110 of the tibia 100; Tibial reaming is performed on the tibia 100 using a drilling device along the guide channel 310 of the guide body 300.

[0057] Among them, the second platform articular surface 210 is designed to match the three-dimensional reconstruction features of the tibial 100 platform bone tissue and is stretched and generated with features such as the platform articular surface and intercondylar ridge; the guide body 300 is extended by fitting the anatomical axis of the tibial 100 medullary cavity to obtain the guide axis, thereby establishing a geometric cylinder; finally, they are combined to form a positioning device.

[0058] Furthermore, it is characterized by being customized to the bony features of each individual patient, making it a non-generic product.

[0059] In some embodiments, reconstructing the medullary canal morphology requires acquiring the patient's CT data and performing three-dimensional modeling based on the CT data to reconstruct the 100mm medullary canal morphology of the tibia; wherein the data format is DICOM (…). .dcm) continuous tomographic files, with a slice thickness preferably within 1mm; 3D modeling is performed using the patient's CT image data to reconstruct the medullary canal morphology and determine the central axis of the tibial 100 medullary canal; based on the surface anatomical features of the patient's tibial 100 platform, a connector 200 portion of a guide device that can be applied to the surface of the patient's tibial 100 platform during surgery is designed; the central axis of the tibial 100 medullary canal is extended out of the tibial 100 platform, and a guide body 300 is designed on the determined connector 200 portion of the guide device based on the central axis of the tibial 100 medullary canal.

[0060] Furthermore, a guide device is installed, and the second platform articular surface 210 of the connector 200 is tightly fitted with the first platform articular surface 120 according to the first mark 230 and the second mark 240, and the connector 200 is connected to the proximal femoral end 110 of the tibia 100; tibia reaming is performed by drilling along the guide channel 310 of the guide body 300.

[0061] To better understand this invention, the following is combined with... Figures 1 to 4 The technical solution of the present invention will be described in detail below: A connector 200 is connected to the proximal femoral end 110 of the tibia 100, and a guide 300 is connected to the connector 200 and has a guide channel 310. The central axis of the guide channel 310 is always aligned with the central axis of the anatomical fitting axis of the medullary canal of the tibia 100, used to guide the drill bit of an external drill bit for tibia medullary reaming. Compared with the prior art, by setting the connector 200 and the guide 300 near the proximal femoral end 110, the connector 200 connects the guide 300 to the proximal femoral end 110, and the guide 300 has a guide channel 310, the central axis of which is always aligned with the central axis of the anatomical fitting axis of the medullary canal of the tibia 100, used to guide the drill bit of an external drill bit to achieve medullary reaming on the anatomical fitting axis of the medullary canal of the tibia 100, thereby effectively ensuring the relatively accurate positioning of the center of the medullary canal of the tibia 100, and making it suitable for different patients.

[0062] The specific workflow of this invention involves reconstructing the medullary canal morphology, acquiring the patient's CT data, and performing three-dimensional modeling based on the CT data to reconstruct the morphology of the tibial 100 medullary canal; this includes continuous tomographic files, with the scan slice thickness preferably within 1 mm; performing three-dimensional modeling using the patient's CT image data to reconstruct the medullary canal morphology and determine the central axis of the tibial 100 medullary canal; designing a connector 200 portion of a guide device that can be applied to the surface of the patient's tibial 100 platform during surgery, based on the surface anatomical features of the patient's tibial 100 platform; extending the central axis of the tibial 100 medullary canal out of the tibial 100 platform, and designing a guide body 300 on the determined connector 200 portion of the guide device based on the central axis of the tibial 100 medullary canal.

[0063] Furthermore, a guide device is installed, and the second platform articular surface 210 of the connector 200 is tightly fitted with the first platform articular surface 120 according to the first mark 230 and the second mark 240, and the connector 200 is connected to the proximal femoral end 110 of the tibia 100; tibia reaming is performed by drilling along the guide channel 310 of the guide body 300.

[0064] This application, through the aforementioned structure, can solve the technical problem in the prior art where standardized positioning devices are not fully applicable to different patients, thus requiring multiple intraoperative fluoroscopy sessions to verify and adjust in order to ensure relatively accurate positioning of the tibial medullary canal center.

[0065] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A tibial reaming guide device, configured to connect to the tibia, the tibia having a near-femoral end and a fitting anatomical axis for the medullary canal, characterized in that, include: Connector body, connected to the proximal femoral end; as well as A guide body is connected to the connector. The guide body has a guide channel, the central axis of which is always aligned with the central axis of the anatomical fitting axis of the medullary canal of the tibia. The guide channel is configured to guide the drill bit of an external drilling tool.

2. The tibial reamer guide device according to claim 1, characterized in that, The connector is plate-shaped and detachably connected to the proximal femoral end.

3. The tibial reamer guide device according to claim 1, characterized in that, The proximal femoral end has a first plateau articular surface, and the connector has a second plateau articular surface formed relative to the first plateau articular surface. The second plateau articular surface fits tightly with the first plateau articular surface and can partially wrap around the first plateau articular surface.

4. The tibial reamer guide device according to claim 3, characterized in that, The connector has a first through hole, the axis of which coincides with the central axis of the anatomical fitting axis of the medullary cavity of the tibia. The guide is cylindrical and connected to the connector. The guide has a second through hole along its axis to form the guide channel, and the axis of the second through hole coincides with the axis of the first through hole.

5. The tibial reamer guide device according to claim 4, characterized in that, The connector has at least one support end on the side opposite to the first platform joint surface. The support end is configured to apply external pressure so that the second platform joint surface of the connector fits tightly against the first platform joint surface.

6. The tibial reamer guide device according to claim 5, characterized in that, The number of support ends is two, and the two support ends are respectively disposed on both sides of the guide body.

7. The tibial reamer guide device according to claim 4, characterized in that, The first platform joint surface is also provided with at least one first connecting hole, and the connecting body is provided with a second connecting hole opposite to the first connecting hole. The second connecting hole penetrates the connecting body, and the connecting body is detachably connected to the first connecting hole of the first platform joint surface through the second connecting hole.

8. The tibial reamer guide device according to claim 7, characterized in that, The number of the second connecting holes is multiple, and the multiple second connecting holes are spaced apart along the circumferential direction of the guide.

9. The tibial reamer guide device according to claim 6, characterized in that, The tibial reaming guide device also includes a first identifier and a second identifier, which are respectively connected to the two support ends.

10. A method for tibial reaming, using the tibial reaming guide device as described in any one of claims 1-9, characterized in that, The specific steps are as follows: The morphology of the medullary cavity was reconstructed by acquiring the patient's CT data and performing three-dimensional modeling based on the CT data to reconstruct the morphology of the tibial medullary cavity. Determine the central axis, and determine the central axis of the tibial medullary cavity; The guide device is designed based on the surface anatomical features of the patient's tibial plateau. A connector that fits into the articular surface of the first plateau is designed, and the outer diameter, inner diameter, and height of the guide are determined according to the central axis of the tibial medullary cavity. Install the guide device, and fit the second platform articular surface of the connector tightly with the first platform articular surface according to the first and second marks, and connect the connector to the proximal femoral end of the tibia; Tibial reaming involves using drilling equipment to ream the tibia along the guide channel of a guide body.

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