Adjustable osteotomy spacer

Abstract

The application provides an adjustable osteotomy pad block, and belongs to the technical field of medical devices.The adjustable osteotomy pad block comprises a first support plate, a second support plate, an adjusting assembly and a connecting piece.The second support plate is rotationally connected to the first support plate through a first rotating shaft.The adjusting assembly is arranged between the first support plate and the second support plate, and is used for adjusting the included angle of the first support plate and the second support plate.The connecting piece is connected between the first support plate and bone, and between the second support plate and bone.The second support plate in the adjustable osteotomy pad block forms a hinged structure that can be opened and closed with the first support plate through the first rotating shaft, and the included angle between the two support plates is flexibly adjusted by means of the intermediate adjusting assembly, so that the overall support thickness and the opening angle of the pad block are changed.The single pad block can cover the requirements of various opening heights and correction angles, and a large number of spare parts are not needed, so that the storage of orthopedic consumables is reduced.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to an adjustable osteotomy pad. Background Technology

[0002] Osteotomy pads are specialized implantable consumables used in orthopedic corrective surgeries, primarily for lower limb correction procedures such as high tibial osteotomy, femoral osteotomy, and ankle osteotomy. During the procedure, the corresponding bone is opened to create a gap, and the osteotomy pad is placed within and fixed in this gap. This stabilizes and maintains the corrected angle after osteotomy and prevents bone rebound that could cause loss of alignment. Simultaneously, it distributes weight-bearing on the limb, reduces stress on internal fixation plates and screws, and replaces traditional autologous or allogeneic bone grafts to fill bone defects, minimizing additional damage from bone harvesting. Some absorbable pads gradually degrade and are absorbed post-operatively, eliminating the need for a second surgery for removal.

[0003] Currently, the osteotomy pads used in clinical practice are all one-piece solid wedges with fixed thickness and height, selected in advance based on preoperative imaging calculations. However, there are significant individual differences in the degree of deformity and skeletal anatomy among different patients, and the estimated opening height often does not match the actual opening height after opening the osteotomy gap during surgery. If the pad height is too small, it cannot stably support the osteotomy gap, which can easily lead to bone rebound and loss of force line correction during surgery, increasing the risk of pad loosening; if the pad height is too large, it will over-open the bone, causing abnormal soft tissue tension in the knee joint, restricted joint movement, and seriously affecting postoperative rehabilitation.

[0004] The current approach is to repeatedly adjust the placement of different sized pads to match the osteotomy gap, which prolongs the operation time, increases the probability of intraoperative infection, and increases the hospital's inventory. Frequent placement of pads of different sizes during the operation can also easily wear down the bone at the osteotomy site, causing bone defects and further increasing the risk of postoperative collapse. Summary of the Invention

[0005] This invention provides an adjustable osteotomy pad, which aims to solve the technical problems of existing osteotomy pads having fixed size specifications, failing to meet the differences in anatomical morphology among different individuals, and frequently placing pads of different sizes, which would prolong the operation time and easily wear down the bone on the osteotomy section.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: to provide an adjustable osteotomy pad, comprising: First support plate; The second support plate is rotatably connected to the first support plate via the first rotating shaft; An adjustment component is disposed between the first support plate and the second support plate, and the adjustment component is used to adjust the included angle between the first support plate and the second support plate; A connector is used to connect the first support plate and the bone, and the second support plate and the bone.

[0007] In one possible implementation, the adjusting component is a wedge block that is slidably connected to the first support plate and / or the second support plate.

[0008] In one possible implementation, the regulating component includes: The first adjusting block is attached to the side of the first support plate facing the second support plate; The second adjusting block is rotatably connected to the first adjusting block via a second rotating shaft, and the second adjusting block is attached to the side of the second support plate facing the first support plate.

[0009] In one possible implementation, the adjustable osteotomy pad further includes a pushing mechanism for driving the adjustment component to reciprocate along a first straight path perpendicular to the axial direction of the first rotating shaft.

[0010] In one possible implementation, the jacking mechanism is an adjusting bolt, which is rotatably connected to the first support plate or the second support plate and threadedly engaged with the adjusting assembly.

[0011] In one possible implementation, a guide component is provided between the first support plate and the adjustment component, and / or between the second support plate and the adjustment component.

[0012] In one possible implementation, the guide assembly includes a chute and a rail adapted to the chute.

[0013] In one possible implementation, the slide rail has a trapezoidal cross-section, and the width of the trapezoid gradually decreases or increases in the direction close to the first support plate.

[0014] In one possible implementation, the side of the first support plate opposite to the second support plate and the side of the second support plate opposite to the first support plate are provided with anti-slip material.

[0015] In one possible implementation, the connector is a 3D-printed hollow screw.

[0016] The solution shown in this application embodiment, compared with the prior art, forms an openable and closable hinged structure between the second support plate and the first support plate via a first rotating shaft. The included angle between the two support plates is flexibly adjusted using an intermediate adjustment component, correspondingly changing the overall support thickness and opening angle of the pad. During surgery, there is no need to pre-stock multiple sizes of pads; after placement in the osteotomy gap, the support height can be directly adjusted on-site to adapt to different patient anatomical differences, solving the problem of mismatch between preoperative calculations and the actual opening gap during surgery. A single pad can cover the needs of various opening heights and correction angles, eliminating the need for large-scale inventory and reducing the storage and management costs of orthopedic consumables.

[0017] In this embodiment, the spacer does not need to be repeatedly replaced, replacing the operation process of placing multiple spacers. Angle adjustment can be completed with a single insertion, significantly reducing the frequency of repeated insertion of the spacer into the surgical area, shortening surgical exposure time, and reducing the probability of contamination of the osteotomy surface. After the first and second support plates are inserted, the overall height of the spacer can be changed by adjusting the opening angle through the adjustment component. This effectively avoids bone surface wear caused by repeated insertion, reduces complications such as loss of corrective force line of the bone interstitium after surgery, and improves surgical stability.

[0018] The first and second support plates fit against the upper and lower bone surfaces of the osteotomy, respectively, and together with the adjustment components, they form a complete support structure. This structure can stably distribute the weight of the limb, reduce the stress on the connecting parts, replace autologous or allogeneic bone grafts to fill bone defects, and avoid the additional trauma caused by bone harvesting surgery. Attached Figure Description

[0019] Figure 1 A three-dimensional structural schematic diagram of the adjustable osteotomy pad provided in an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the first support plate used in an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the second support plate used in an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the adjustment component used in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: 10 - First support plate; 20 - Second support plate; 30 - First pivot; 40 - Adjustment component; 41 - First adjustment block; 42 - Second adjustment block; 43 - Second rotating shaft; 50 - Adjusting bolt; 60 - Slide rail; 61 - Slide groove; 70-Anti-slip body; 71-Connector; 72-Bone graft groove; 73-Protrusion. Detailed Implementation

[0021] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present 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 of the present invention and are not intended to limit the present invention.

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0024] Please refer to the following: Figures 1 to 4 The adjustable osteotomy pad provided by the present invention will now be described.

[0025] The adjustable osteotomy pad includes a first support plate 10, a second support plate 20, an adjustment component 40, and a connector 71.

[0026] The second support plate 20 is rotatably connected to the first support plate 10 via the first rotating shaft 30; the adjustment component 40 is disposed between the first support plate 10 and the second support plate 20, and the adjustment component 40 is used to adjust the included angle between the first support plate 10 and the second support plate 20; the connector 71 is connected between the first support plate 10 and the bone, and between the second support plate 20 and the bone.

[0027] It should be noted that the first support plate 10 and the second support plate 20 are rotatably connected on one side, so that the adjustment component 40 can adjust the opening angle between the first support plate 10 and the second support plate 20 to adapt to osteotomy gaps of different heights. After the adjustment is completed, the connector 71 is installed between the first support plate 10 and the bone. Similarly, the connector 71 also needs to be installed between the second support plate 20 and the bone.

[0028] It is conceivable that, since the connector 71 needs to be implanted, holes can be pre-drilled in the first support plate 10 and the second support plate 20. Alternatively, the first support plate 10 and the second support plate 20 can be made of PEEK (polyetheretherketone), which is convenient for on-site drilling.

[0029] Correspondingly, connector 71 can also be made of PEEK material or metal material.

[0030] In actual installation, the connector 71 is usually inserted from the side of the first support plate 10 and the second support plate 20 away from the first rotating shaft 30. To prevent the head of the connector 71 from protruding from the outer surface of the first support plate 10 and the second support plate 20, a groove is usually provided on the side of the first support plate 10 and the second support plate 20 away from the first rotating shaft 30. After the connector 71 is inserted, it is located in the groove, avoiding frequent friction between the outer edge of the first support plate 10 and the second support plate 20 and the surrounding soft tissue. The grooves of the first support plate 10 and the second support plate 20 can be independent of each other, or the inner walls of the grooves of the first support plate 10 and the second support plate 20 can be continuous.

[0031] The adjustable osteotomy pad provided in this embodiment, compared with the prior art, forms an openable and closable hinge structure between the second support plate 20 and the first support plate 10 via the first rotating shaft 30. The included angle between the two support plates is flexibly adjusted by the intermediate adjustment component 40, correspondingly changing the overall support thickness and opening angle of the pad. During surgery, there is no need to pre-stock multiple sizes of pads; after placement in the osteotomy gap, the support height can be directly adjusted on-site to adapt to different patient anatomical differences, solving the problem of mismatch between preoperative calculations and the actual opening gap during surgery. A single pad can cover the needs of various opening heights and correction angles, eliminating the need for large-scale stockpiling and reducing orthopedic consumable storage and management costs.

[0032] In this embodiment, the pad does not need to be repeatedly replaced, replacing the operation process of using multiple pads. Angle adjustment can be completed with a single insertion, which greatly reduces the frequency of the pad repeatedly entering the surgical area, shortens the surgical exposure time, and reduces the probability of contamination of the osteotomy surface.

[0033] After the first support plate 10 and the second support plate 20 are inserted, the opening angle can be adjusted by adjusting the adjustment component 40 to change the overall height of the pad. This can effectively avoid bone surface wear caused by repeated insertion, reduce complications such as loss of corrective force line of bone space after surgery, and improve surgical stability.

[0034] The first support plate 10 and the second support plate 20 respectively fit the upper and lower bone surfaces of the osteotomy, and together with the adjustment component 40, they form a complete support structure. This structure can stably distribute the weight of the limb, reduce the stress on the matching connector 71, replace autologous or allogeneic bone grafts to fill bone defects, and avoid the additional trauma caused by bone harvesting surgery.

[0035] In some embodiments, one specific implementation of the adjustment component 40 may adopt the structure described below. (Not shown in the figures), the adjustment component 40 is a wedge block, which is slidably connected to the first support plate 10 and / or the second support plate 20.

[0036] The wedge block can be slidably connected only to the first support plate 10, only to the second support plate 20, or simultaneously to both the first support plate 10 and the second support plate 20. It is easy to imagine that the wedge block can be used even if it is simply placed between the first support plate 10 and the second support plate 20 and has no mating relationship with either of them.

[0037] By moving the wedge block along the direction of approaching or moving away from the first pivot 30, the angle between the first support plate 10 and the second support plate 20 can be adjusted within a certain angle range. A single wedge block can achieve continuous height adjustment, eliminating the need to replace multiple pads and shortening surgical time. The wedge block sliding adjustment structure is simple and easy to manufacture; the wedge block can also be made of the same PEEK material as the pads. The inclined surface support of the wedge block distributes the stress, making the first support plate 10 and the second support plate 20 less prone to stress concentration and fracture, suitable for weight-bearing corrective surgeries such as high tibial osteotomy.

[0038] As a further improvement to the wedge block, multiple wedge blocks can also be set between the first support plate 10 and the second support plate 20. The multiple wedge blocks are stacked together. In order to improve the connection stability between two adjacent wedge blocks, the connection between two adjacent wedge blocks can also be achieved through structures such as snap-fit.

[0039] It is not hard to imagine that, in addition to using multiple wedges to form the adjustment assembly 40, multiple shims can also be used to form the adjustment assembly 40.

[0040] In some embodiments, a modified implementation of the adjustment component 40 may employ, as follows: Figure 1 and Figure 4 The structure is shown. The adjustment assembly 40 includes a first adjustment block 41 and a second adjustment block 42. The first adjustment block 41 is attached to the side of the first support plate 10 facing the second support plate 20. The second adjustment block 42 is rotatably connected to the first adjustment block 41 through a second rotating shaft 43. The second adjustment block 42 is attached to the side of the second support plate 20 facing the first support plate 10.

[0041] The first adjusting block 41 and the second adjusting block 42 are hinged together by the second rotating shaft 43. This embodiment has two usage forms: (1) The angle between the first adjusting block 41 and the second adjusting block 42 cannot be fixed and can be freely adjusted. In use, the adjusting component 40 can be moved in the direction close to or away from the first rotating shaft 30. When the position of the adjusting component 40 changes, the first adjusting block 41 and the second adjusting block 42 will automatically rotate due to the squeezing force of the first support plate 10 and the second support plate 20, thereby ensuring that the first adjusting block 41 is completely in contact with the surface of the first support plate 10 and the second adjusting block 42 is completely in contact with the surface of the second support plate 20. Compared with setting a wedge block, the fit between the adjusting block and the support plate can be improved, the support force is uniform, and there is no stress concentration.

[0042] (2) The angle between the first adjusting block 41 and the second adjusting block 42 can be fixed. After the adjusting component 40 is fixed in a certain position, the angle between the first support plate 10 and the second support plate 20 can be changed simply by changing the included angle between the first adjusting block 41 and the second adjusting block 42. After the angle between the first adjusting block 41 and the second adjusting block 42 is adjusted, the adjusting component 40 can be moved closer to or further away from the first rotating shaft 30 to further change the included angle between the first support plate 10 and the second support plate 20. This method of use, by changing the included angle of the first adjusting block 41 and the second adjusting block 42 in combination with changing the position, can achieve a larger range of angle adjustment for the first support plate 10 and the second support plate 20, adapting to the bones of patients with greater deformity differences.

[0043] Specifically, when the angle between the first adjusting block 41 and the second adjusting block 42 can be fixed, it can be achieved by relying on the frictional force between the second rotating shaft 43 and the first adjusting block 41 and the second adjusting block 42, or by setting a support rod between the first adjusting block 41 and the second adjusting block 42. The support rod is rotatably connected to the first adjusting block 41, and the included angle between the first adjusting block 41 and the second adjusting block 42 is fixed by engaging with different slots on the second adjusting block 42. Alternatively, when the included angle between the first adjusting block 41 and the second adjusting block 42 is different, a support rod of different length can be used.

[0044] In some embodiments, an improved implementation of the above-described adjustable osteotomy pad can be as follows: Figure 1 and Figure 4 The structure shown is as follows. The adjustable osteotomy pad also includes a pushing mechanism, which drives the adjustment assembly 40 to reciprocate along a first linear path, the first linear path being perpendicular to the axial direction of the first rotating shaft 30.

[0045] The jacking mechanism is connected between the first support plate 10 and the adjusting component 40, or between the second support plate 20 and the adjusting component 40.

[0046] It is easy to see that, regardless of whether the adjusting component 40 is a wedge block or a combination of the first adjusting block 41 and the second adjusting block 42, the position of the adjusting component 40 can be changed by a push structure.

[0047] In this embodiment, a pushing mechanism is used to move the adjustment component 40 along the first straight path, thereby achieving precise guidance of the movement trajectory of the adjustment component 40 and ensuring a constant linear relationship between the distance it moves and the change in the included angle. This allows operators to quickly calculate the distance the adjustment component 40 needs to move based on the linear relationship, reducing the difficulty of adjustment and improving the efficiency of adjustment.

[0048] The intraoperative adjustment process is convenient and controllable, eliminating the need for manual insertion into the gap to adjust the adjustment component 40. Fine-tuning of the height can be achieved through an externally operated push mechanism, ensuring aseptic operation and minimizing instrument movement in and out of the surgical area. The adjustment stroke is continuously controllable, precisely matching individual patient differences in osteotomy gaps for higher correction accuracy.

[0049] In some embodiments, a specific implementation of the above-described pushing mechanism may employ, as follows: Figure 1 and Figure 4 The structure shown is as follows. The jacking mechanism is an adjusting bolt 50, which is rotatably connected to the first support plate 10 or the second support plate 20 and is threadedly engaged with the adjusting assembly 40.

[0050] In specific implementation, when the adjustment assembly 40 includes a first adjustment block 41 and a second adjustment block 42, if the adjustment bolt 50 is installed on the first support plate 10, its end is installed on the first adjustment block 41; if the adjustment bolt 50 is installed on the second support plate 20, its end is installed on the second adjustment block 42.

[0051] In this embodiment, the adjusting bolt 50 is used as the pushing mechanism. Relying on the helical transmission of the threaded pair, a small rotation of the adjusting bolt 50 can be converted into a small linear displacement of the adjusting component 40, which can finely change the included angle of the first and second support plates 20, accurately match the individualized osteotomy opening gap of the patient, and avoid inadequate or excessive adjustment.

[0052] The threaded fit has a natural self-locking property. After the bolt is stopped from turning, the adjusting component 40 will not slip under pressure, eliminating the need for additional locking parts such as clips and springs. It can also ensure that the current opening angle can be stably maintained before the connector 71 is installed, preventing angle rebound.

[0053] The head of the adjusting bolt 50 is located on the outside of the first support plate 10 or the second support plate 20 on the side opposite to the first rotating shaft 30. During the operation, a wrench or screwdriver is used to rotate it from the outside, eliminating the need to insert instruments into the osteotomy gap to adjust the adjusting component 40. This reduces the repeated entry and exit of instruments into the surgical area, lowers the risk of infection, and shortens the operation time.

[0054] Specifically, taking the installation of adjusting bolt 50 on the first support plate 10 as an example, the first support plate 10 has a through hole corresponding to the adjusting bolt 50, and a nut is fitted onto the adjusting bolt 50. The head of the adjusting bolt 50 and the nut are distributed at both ends of the through hole, thereby ensuring that the adjusting bolt 50 does not change its relative position with the first support plate 10 during rotation. The adjusting bolt 50 is threadedly connected to the adjusting assembly 40, thereby enabling the adjusting assembly 40 to reciprocate along the first linear path during forward and reverse rotation.

[0055] It should be noted that the connector 71 is also installed from the side of the first support plate 10 and the second support plate 20 away from the first rotating shaft 30. When both the connector 71 and the adjusting bolt 50 need to be installed on the side of the first support plate 10 and the second support plate 20 away from the first rotating shaft 30, the side of the first support plate 10 facing the second support plate 20 and the side of the second support plate 20 facing the first support plate 10 can be thickened to form a protrusion 73, thereby improving the structural strength of the side of the first support plate 10 and the second support plate 20 away from the first rotating shaft 30 and avoiding deformation or breakage due to stress after installation.

[0056] With the protrusion 73 provided, the adjustment component 40 can also be limited to prevent it from moving excessively and sliding out of the space between the first support plate 10 and the second support plate 20.

[0057] As a variation of the jacking mechanism, a snap-fit ​​push rod, rack and pinion, or other mechanisms can also be used instead.

[0058] In some embodiments, an improved implementation of the above-described adjustable osteotomy pad can be as follows: Figures 2 to 4 The structure is shown. A guide component is provided between the first support plate 10 and the adjusting component 40, and / or between the second support plate 20 and the adjusting component 40. The guide component may be provided only between the first support plate 10 and the adjusting component 40, or only between the second support plate 20 and the adjusting component 40; or guide components may be provided between both the first support plate 10 and the adjusting component 40 and between the second support plate 20 and the adjusting component 40.

[0059] When the adjusting component 40 is a wedge block, or is formed by a combination of the first adjusting block 41 and the second adjusting block 42, the guide component can be used.

[0060] The guide component constrains the adjustment component 40 to only move along the first straight path, avoiding the adjustment component 40 from shifting left or right under the drive of the push mechanism; during adjustment, the first support plate 10 and the second support plate 20 are opened synchronously and evenly on both sides, and there will be no tilting due to force on one side, ensuring that the two support plates are always evenly attached to the upper and lower bone surfaces of the osteotomy, and the correction force line will not be deviated.

[0061] The adjustment component 40 and the support plate are limited by the guide component. There is no misalignment or interference when they slide relative to each other. When the adjustment bolt 50 is rotated or the push mechanism is driven, the adjustment component 40 moves in and out smoothly without jamming or sticking. The process of repeatedly fine-tuning the opening height and verifying the lower limb force line during the operation is smooth and reduces the difficulty of the operation.

[0062] In some embodiments, a specific implementation of the above-described guiding component may employ, as follows: Figures 2 to 4 The structure is shown. The guide assembly includes a groove 61 and a rail 60 adapted to the groove 61.

[0063] The guide component between the first support plate 10 and the adjustment component 40 can be: a slide groove 61 is provided on the first support plate 10, and a slide rail 60 is provided on the adjustment component 40; or a slide groove 61 is provided on the adjustment component 40, and a slide rail 60 is provided on the first support plate 10.

[0064] The guide component between the second support plate 20 and the adjustment component 40 can be: a slide groove 61 is provided on the second support plate 20, and a slide rail 60 is provided on the adjustment component 40; or the slide groove 61 is provided on the adjustment component 40, and the slide rail 60 is provided on the second support plate 20.

[0065] The slide rail 60 is fully embedded in the slide groove 61, and the two form a large-area linear fit, resulting in uniform force distribution. When the rotating adjusting bolt 50 pushes the adjusting component 40 forward and backward, there is no local interference or jamming. The operation is smooth with multiple fine adjustments to the opening height and repeated checks of the lower limb force line during the operation, reducing the difficulty of the doctor's operation.

[0066] The groove 61 forms an upper and lower wrapping limit on the slide rail 60, which can prevent the adjustment component 40 from tilting upward or falling off the support plate when under force, ensuring that the adjustment component 40 is always clamped between the two support plates, and there will be no local suspension or single-point support. The support force is more balanced, and the overall structural rigidity of the pad block is improved.

[0067] During intraoperative assembly, the slide rail 60 can be directly aligned with the slide groove 61 to achieve rapid positioning without the need for repeated correction and adjustment of the position of the component 40, making assembly simple.

[0068] As a variation of the implementation, the guide assembly may also adopt structures such as guide posts and guide sleeves.

[0069] In some embodiments, an improved implementation of the slide rail 60 described above may employ, as follows: Figures 2 to 3 The structure shown is as follows. The cross-section of the slide rail 60 is an isosceles trapezoid, and the width of the isosceles trapezoid gradually decreases or increases in the direction close to the first support plate 10.

[0070] For example, the first support plate 10 is provided with a slide rail 60 on the side facing the adjustment component 40 and the second support plate 20 is provided with a slide groove 61 on the side facing the first support plate 10 and the side facing the second support plate 20.

[0071] Specific types include: (1) The width of the slide rail 60 on the second support plate 20 gradually increases along the direction close to the first support plate 10, and the width of the slide rail 60 on the first support plate 10 gradually decreases along the direction close to the second support plate 20.

[0072] (2) The width of the slide rail 60 on the second support plate 20 gradually decreases along the direction close to the first support plate 10, and the width of the slide rail 60 on the first support plate 10 gradually increases along the direction close to the second support plate 20.

[0073] (3) The width of the slide rail 60 on the second support plate 20 gradually decreases along the direction close to the first support plate 10, and the width of the slide rail 60 on the first support plate 10 gradually decreases along the direction close to the second support plate 20.

[0074] (4) The width of the slide rail 60 on the second support plate 20 gradually increases in the direction close to the first support plate 10, and the width of the slide rail 60 on the first support plate 10 gradually increases in the direction close to the second support plate 20.

[0075] When the width of the cross section of the slide rail 60 gradually decreases in the direction away from the support plate, it is easy to install; when the width of the cross section of the slide rail 60 gradually increases in the direction away from the support plate, it can prevent separation from the corresponding support plate during the movement of the adjustment component 40.

[0076] The trapezoidal slide rail 60 and the trapezoidal slide groove 61 engage with each other to form a hook-type limiting structure, which simultaneously restricts the displacement of the slide rail 60 in four directions: up, down, left, and right. The rectangular slide rail 60 is limited only by the side wall, and it is easy to lift up and detach from the slide groove 61 after being subjected to force. However, the trapezoidal section can be firmly fitted, and even under the weight of the skeleton and the action of adjustment thrust, the adjustment component 40 will not lift up and detach from the slide groove 61, thus greatly improving the structural stability.

[0077] The trapezoidal slope increases the contact bearing area between the slide rail 60 and the slide groove 61, and the pressure generated by the lower limb load is evenly distributed along the two slopes, avoiding stress concentration at the corners of the rectangular slide rail 60; the main body of the pad is mostly PEEK, and the trapezoidal fit structure can reduce the risk of local cracking and deformation, making it suitable for high-load surgeries such as high tibial osteotomy, and it is not easy to fail after long-term implantation.

[0078] In some embodiments, an improved implementation of the above-described adjustable osteotomy pad can be as follows: Figures 2 to 3The structure shown is as follows. The first support plate 10 is provided with an anti-slip body 70 on the side opposite to the second support plate 20, and the second support plate 20 is provided with an anti-slip body 70 on the side opposite to the first support plate 10.

[0079] When the rotating adjusting bolt 50 is used to adjust the angle between the two support plates and change the opening height during the operation, the anti-slip body 70 can greatly increase the friction between the support plate and the upper and lower bone. The pad will not slip laterally or back and forth on the bone surface, and the position of the pad is stable during the adjustment process.

[0080] After implantation, when the patient stands and walks, the weight of the limb is borne by the limb, and there is a tendency for shearing and slippage between the bone and the pad. The anti-slip body 70 increases the interface friction and forms a double constraint with the connector 71 to prevent the pad from sliding and shifting in the bone gap and to stably maintain the opening height.

[0081] Optionally, the anti-slip body 70 can be an array of conical structures, grid-like grooves, strip-shaped serrations, hemispherical particles, etc.

[0082] In some embodiments, an improved implementation of the connector 71 described above may employ, as follows: Figure 1 The structure is shown. Connector 71 is a 3D-printed hollow screw.

[0083] Prepared using 3D printing, the screw's shape, thread density, and length can be customized based on the patient's preoperative data to suit patients with different bone volume and bone morphology.

[0084] In some embodiments, an improved implementation of the above-described adjustable osteotomy pad can be as follows: Figures 2 to 3 The structure is shown. Both the first support plate 10 and the second support plate 20 are provided with bone graft grooves 72.

[0085] The bone graft grooves 72 opened on the surfaces of the first support plate 10 and the second support plate 20 can be filled with autologous bone, allogeneic bone, artificial bone particles or bone repair materials. The gaps formed by the osteotomy and expansion have sufficient bone graft carriers, which can accelerate the formation of bone bridges between the upper and lower osteotomy surfaces, achieve bone fusion, avoid the long-term existence of gaps and the formation of pseudoarthrosis, and improve the long-term healing quality of the surgery.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable osteotomy pad, characterized in that, include: First support plate; The second support plate is rotatably connected to the first support plate via the first rotating shaft; An adjustment component is disposed between the first support plate and the second support plate, and the adjustment component is used to adjust the included angle between the first support plate and the second support plate; A connector is used to connect the first support plate and the bone, and the second support plate and the bone.

2. The adjustable osteotomy pad as described in claim 1, characterized in that, The adjustment component is a wedge block, which is slidably connected to the first support plate and / or the second support plate.

3. The adjustable osteotomy pad as described in claim 1, characterized in that, The adjustment component includes: The first adjusting block is attached to the side of the first support plate facing the second support plate; The second adjusting block is rotatably connected to the first adjusting block via a second rotating shaft, and the second adjusting block is attached to the side of the second support plate facing the first support plate.

4. The adjustable osteotomy pad as described in claim 1, characterized in that, The adjustable osteotomy pad also includes a pushing mechanism, which drives the adjustment component to reciprocate along a first straight path, the first straight path being perpendicular to the axial direction of the first rotating shaft.

5. The adjustable osteotomy pad as described in claim 4, characterized in that, The jacking mechanism is an adjusting bolt, which is rotatably connected to the first support plate or the second support plate and threadedly engaged with the adjusting component.

6. The adjustable osteotomy pad as described in claim 1, characterized in that, A guide component is provided between the first support plate and the adjustment component, and / or between the second support plate and the adjustment component.

7. The adjustable osteotomy pad as described in claim 6, characterized in that, The guide assembly includes a chute and a slide rail adapted to the chute.

8. The adjustable osteotomy pad as described in claim 7, characterized in that, The slide rail has an isosceles trapezoidal cross section, and the width of the isosceles trapezoid gradually decreases or increases in the direction close to the first support plate.

9. The adjustable osteotomy pad as described in claim 1, characterized in that, The first support plate has an anti-slip body on the side opposite to the second support plate, and the second support plate has an anti-slip body on the side opposite to the first support plate.

10. The adjustable osteotomy pad as described in claim 1, characterized in that, The connector is a 3D-printed hollow screw.

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