Dual degree of freedom osteotome

Abstract

The application discloses a double-degree-of-freedom osteotomy device, which comprises an osteotomy guiding base, a sliding groove is formed in the osteotomy guiding base, osteotomy grooves are arranged on the two sides of the osteotomy guiding base, and a guiding groove is arranged at the bottom of the osteotomy guiding base; the device further comprises a needle foot base assembly which is slidably assembled in the guiding groove, the assembly is composed of a cover plate, a needle foot plate and a base which are sequentially connected; the device further comprises an inner-outer rotation adjusting mechanism which is composed of an inner-outer rotation adjusting rod and an inner-outer rotation cam which are connected, the inner-outer rotation cam is matched with the needle foot plate; the device further comprises a front-rear movement adjusting mechanism which is composed of a front-rear movement adjusting rod and a front-rear movement cam which are connected, the front-rear movement cam is matched with the cover plate; the device further comprises a scale indicating device which is composed of a sliding scale ring and a scale pressing plate, the sliding scale ring is assembled in the sliding groove, and the scale pressing plate is fixed on the base. The osteotomy device can realize independent and accurate control of translation of an osteotomy surface by ±3mm and rotation of the osteotomy surface by ±4°, the accuracy reaches sub-millimeter and sub-degree levels, and the surgical effect is effectively optimized.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology and relates to a two-degree-of-freedom osteotomy device. Background Technology

[0002] Total knee arthroplasty (TKA) is a key treatment for end-stage knee osteoarthritis. Its core objectives are to reconstruct lower limb alignment, relieve joint pain, restore knee function, and maintain the long-term survival of the prosthesis. Distal femoral osteotomy is a crucial step in this surgery, and its precise positioning is a significant factor in ensuring accurate prosthesis placement, flexion-extension balance, correct patellar trajectory, and good knee function recovery. A distal femoral osteotomy device is essential for ensuring precise distal femoral osteotomy. An ideal femoral osteotomy device must meet multiple requirements: First, the osteotomy surface should precisely conform to the prosthesis shape to avoid stress concentration or early prosthesis loosening; second, the osteotomy angle (such as valgus angle and kyphosis angle) needs to be dynamically adjusted according to the individual's physiological alignment; finally, the osteotomy operation must be three-dimensionally controllable, capable of independently adjusting the osteotomy position (including anteroposterior and medial / lateral directions) and rotation angle with millimeter-level precision to adapt to possible bone morphological variations encountered during surgery.

[0003] The core limitation of current clinical femoral osteotomy instruments lies in the separate design of the measuring device and the osteotomy device. Once the femoral osteotomy device is installed and fixed, the osteotomy position and angle cannot be readjusted. A few existing adjustable guides only support a single degree of freedom of adjustment (such as currently only anterior-posterior translation adjustment). When encountering bone morphology variations or abnormal soft tissue tension during surgery, they cannot correct the anterior-posterior position (anteroposterior direction) and rotation angle (rotational position) of the osteotomy face, forcing surgeons to repeatedly disassemble the guide or rely on experience-based estimations, resulting in cumbersome operation, accumulated errors, and prolonged surgical time. For cases of bone defects or deformities, existing instruments are even less able to meet personalized osteotomy needs, forcing the adoption of "compromise solutions."

[0004] Although existing technologies have proposed adjustable femoral osteotomy instruments (focusing on varus / valgus angle adjustment and distal osteotomy thickness control) such as application number CN202122363651.5, and femoral osteotomy instrument kits (achieving distal and anterior condyle positioning osteotomy through a split structure) in application number CN201710248971.1, the above solutions still cannot achieve dual-degree-of-freedom coordinated adjustment of anterior / posterior position and rotation angle under the fixed guide plate state. Existing technologies either only adjust the angle (such as varus / valgus), or only control the linear displacement (such as anterior / posterior osteotomy amount), or rely on split modules, all of which lack the ability to synchronously and independently fine-tune the position and rotation during surgery, resulting in poor prosthesis matching and edge load risks.

[0005] Therefore, the core defect of existing osteotomy instruments, which cannot simultaneously adjust position and angle during surgery, has become a key bottleneck restricting precise osteotomy in TKA. Summary of the Invention

[0006] To achieve the above objectives, this invention provides a dual-degree-of-freedom osteotomy device, which solves the problems of insufficient osteotomy precision caused by the inability of osteotomy instruments to simultaneously fine-tune their position and angle and the lack of dynamic adjustment during surgery. It enables independent control of the osteotomy surface for ±3mm anterior-posterior translation and ±4° rotation adjustment during surgery, improving the precision to the sub-millimeter / sub-degree level, optimizing prosthesis matching and shortening the operation time.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is a two-degree-of-freedom osteotomy device, comprising: The osteotomy guide base has a sliding groove, osteotomy grooves on the left and right sides, and a guide groove at the bottom. A pin base assembly, which is slidably assembled in the guide groove, and the pin base assembly includes a cover plate, a pin plate and a base connected in sequence; The inner and outer rotation adjustment mechanism includes an inner and outer rotation adjustment rod and an inner and outer rotation cam connected to each other, wherein the inner and outer rotation cam cooperates with the pin plate; The forward and backward movement adjustment mechanism includes a forward and backward movement adjustment rod and a forward and backward movement cam connected to each other, wherein the forward and backward movement cam cooperates with the cover plate; The scale indicator includes a sliding scale ring and a scale pressure plate. The sliding scale ring is assembled in the sliding groove, and the scale pressure plate is installed on the osteotomy guide base.

[0008] Furthermore, the osteotomy guide base is provided with a closed osteotomy groove and an open osteotomy groove on the left and right sides respectively; the osteotomy guide base is provided with an oblique fixing hole on each of the left and right sides of the front side, and the osteotomy guide base is provided with a square groove and a square opening groove on the front and rear sides respectively.

[0009] Furthermore, the osteotomy guide base is provided with three circular through holes, including circular through hole one, circular through hole two, and circular through hole three.

[0010] Furthermore, the pin plate is disposed in the fan-shaped groove of the base, and a radial positioning structure is provided between the pin plate and the base, with gaps left at both ends of the fan-shaped groove.

[0011] Furthermore, the cover plate and the base are connected by a plug-in structure.

[0012] Furthermore, the bottom end of the inner and outer rotation adjustment rod passes through the cover plate and is connected to the inner and outer rotation cam, which is installed in the cam groove of the pin plate; the top end of the inner and outer rotation adjustment rod passes through the sliding scale ring and the sliding groove in sequence, and the inner and outer rotation adjustment rod is rotatably engaged with the sliding scale ring and the osteotomy guide base.

[0013] Furthermore, the bottom end of the forward and backward moving adjustment rod is connected to the forward and backward moving cam, and the forward and backward moving cam is installed in the cam groove two of the cover plate; the top end of the forward and backward moving adjustment rod is fitted into the circular through hole one in a clearance fit manner.

[0014] Furthermore, the outer circumference of the sliding scale ring is provided with a rotation angle scale, and the top of the inner and outer rotation adjustment rod is provided with a mark for indicating the rotation angle; the surface of the scale pressure plate is provided with a length scale, and the top of the front and back movement adjustment rod is provided with a mark for indicating the length scale.

[0015] Furthermore, the graduated pressure plate is fixed to the osteotomy guide base by a clamping screw, which passes through the mounting hole of the graduated pressure plate and is screwed into the second and third circular through holes.

[0016] Furthermore, both the first cam groove and the second cam groove are waist-shaped grooves.

[0017] The beneficial effects of this invention are: 1. This invention employs a cam mechanism to precisely limit the range of motion (translation ±3mm, rotation ±4°), featuring a compact structure, simple manufacturing, and low cost. The cam transmission mechanism has no backlash, ensuring high precision and good repeatability during adjustment. A dual-scale indicator provides real-time feedback on translational distance and rotational angle, achieving sub-millimeter and sub-degree osteotomy precision. Combined with dual protection from mechanical hard limits and visual soft limits, it effectively prevents misoperation and improves surgical safety. The upward-facing adjustment panel conforms to ergonomic requirements, providing the surgeon with an unobstructed view and supporting synchronous adjustment using a hex wrench, significantly improving surgical efficiency and operational smoothness.

[0018] 2. This invention supports fine-tuning during surgery. Anterior-posterior translation of ±3mm can optimize prosthesis size matching and soft tissue tension; internal-external rotation adjustment of ±4° helps improve prosthesis rotation alignment, patellar trajectory, and joint stability, thereby significantly reducing the risk of complications caused by misalignment and soft tissue imbalance. Intuitive mechanical scale feedback reduces reliance on advanced intraoperative image-guided equipment, saving surgical costs while ensuring surgical outcomes.

[0019] 3. This invention supports universal operation on both left and right femurs through the inlay-type insertion design of the pin base assembly and the bilaterally symmetrical osteotomy groove structure on the osteotomy guide base. The modular design facilitates thorough cleaning and disinfection, simplifies maintenance, and ensures high reliability. This overall structure effectively solves the key technical problem of the inability to accurately correct the osteotomy position and angle in real time during surgery. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a bottom-view structural diagram of the present invention.

[0022] Figure 2 This is a top view of the structure of the present invention.

[0023] Figure 3 This is an exploded structural diagram of the present invention, wherein (a) is a top view and (b) is a bottom view.

[0024] Figure 4 This is a structural diagram of the pin base assembly.

[0025] Figure 5 This is a schematic diagram of the assembly structure of the pin plate and the base.

[0026] Figure 6 This is a structural diagram of the cover plate.

[0027] Figure 7 This is a schematic diagram of the guide groove of the osteotomy guide base. Figure 8 This is a schematic diagram of the assembly structure of the pin base assembly and the osteotomy guide base. Figure 9 This is a schematic diagram of the internal and external rotating adjustment rod, where (a) is an exploded view and (b) is an assembled view.

[0028] Figure 10 This is a schematic diagram of the installation of the internal and external rotation adjustment rod.

[0029] Figure 11 This is a schematic diagram of the front and rear moving adjustment rod, where (a) is an exploded view and (b) is an assembly view.

[0030] In the figure, 1. Osteotomy guide base, 1-1. Sliding groove, 1-2. Circular through hole one, 1-3. Circular through hole two, 1-4. Circular through hole three, 1-5. Guide groove, 2. Clamping screw, 3. Scale pressure plate, 4. Sliding scale ring, 5. Inner and outer rotation adjustment rod, 6. Front and back movement adjustment rod, 7. Front and back movement cam, 8. Inner and outer rotation cam, 9. Cover plate, 9-1. Through hole, 9-2. Cam groove two, 10. Pin plate, 10-1. Cam groove one, 11. Base, 11-1. Fan-shaped groove, 12. Pin base assembly, 13. Closed osteotomy groove, 14. Open osteotomy groove, 15. Angled fixing hole, 16. Square groove, 17. Square open groove. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] This invention provides a two-degree-of-freedom osteotomy device, hereinafter referred to as the osteotomy device, such as... Figure 1-8 As shown; where, Figure 3 This is an exploded structural diagram of the present invention. Figure 3 (a) is a top-down view. Figure 3 (b) View from below; includes osteotomy guide base 1; the middle of osteotomy guide base 1 is set with a sunken flat round groove structure, on which a sliding groove 1-1 is provided, and the left and right sides of osteotomy guide base 1 are provided with closed osteotomy grooves 13 and open osteotomy grooves 14, supporting universal operation for left and right femurs. By rotating the entire osteotomy device 180 degrees, the front and rear positions of closed osteotomy grooves 13 and open osteotomy grooves 14 can be exchanged, thereby quickly adapting to the different anatomical structures of the left and right femurs and achieving universality; osteotomy guide base The bottom of the base 1 is provided with a guide groove 1-5; the periphery of the sliding groove 1-1 is provided with three circular through holes, namely circular through hole one 1-2, circular through hole two 1-3, and circular through hole three 1-4, for the installation, adjustment and fixation of components; the front and left sides of the osteotomy guide base 1 are each provided with an oblique fixing hole 15, which serves as a guide pin hole for temporary fixation during surgery, and the front and rear sides of the front of the osteotomy guide base 1 are respectively provided with a square groove 16 and a square opening groove 17 for installing auxiliary instruments (such as a handle).

[0033] The pin base assembly 12 consists of a cover plate 9, a pin plate 10, and a base 11. The pin base assembly 12 is slidably assembled in the guide groove 1-5 at the bottom of the osteotomy guide base 1. The cover plate 9, the pin plate 10, and the base 11 are assembled through a plug-in structure. The pin plate 10 is set in the fan-shaped groove 11-1 of the base 11, and the central contour of the fan-shaped groove 11-1 is adapted to the pin plate 10 to achieve radial positioning. There is a gap at both ends of the fan-shaped groove 11-1 to provide rotational freedom for the pin plate 10. The cover plate 9 is plugged into the corresponding groove on the base 11 through the vertical protrusions on both sides.

[0034] Furthermore, such as Figure 9-11 As shown; where, Figure 9 This is a schematic diagram of the internal and external rotation adjustment rod. Figure 9 (a) is its decomposed state diagram. Figure 9 (b) is its assembly diagram. Figure 11 This is a schematic diagram of the structure of the forward and backward moving adjustment rod. Figure 11 (a) is its decomposed state diagram. Figure 11 (b) Its assembly diagram; the bottom end of the inner and outer rotation adjustment rod 5 passes through the through hole 9-1 of the cover plate 9 and is inserted into the inner and outer rotation cam 8 installed in the cam groove 10-1 of the pin plate 10, together forming a rotatable camshaft assembly, which constitutes the inner and outer rotation adjustment mechanism of the present invention; the cam groove 10-1 is a waist-shaped groove, the length and curvature of which limit the eccentric movement range of the inner and outer rotation cam 8, thereby converting the rotation of the cam into a linear thrust on the groove wall, driving the pin plate 10 to rotate; the top end of the inner and outer rotation adjustment rod 5 passes through the sliding scale ring 4 in sequence. The sliding groove 1-1 is rotatable relative to it; the bottom end of the forward and backward moving adjustment rod 6 is inserted into the forward and backward moving cam 7 installed in the cam groove 9-2 of the cover plate 9, together forming another rotatable camshaft assembly, which constitutes the forward and backward moving adjustment mechanism of the present invention; the cam groove 9-2 is also a waist-shaped groove, the structure of which limits the eccentric movement range of the forward and backward moving cam 7, thereby converting the rotation of the cam into a linear thrust on the groove wall; the top end of the forward and backward moving adjustment rod 6 is fitted into the circular through hole 1-2 of the base in a clearance fit manner.

[0035] Furthermore, the sliding scale ring 4 and the scale pressure plate 3 together constitute a scale indicating device for real-time display of the translation distance and rotation angle of the needle plate 10; the scale pressure plate 3 covers the top of the sliding scale ring 4 and the inner and outer rotation adjustment rod 5, is installed in the middle of the osteotomy guide base 1, and is screwed into the circular through hole 1-3 and circular through hole 1-4 of the osteotomy guide base 1 through the mounting holes on the scale pressure plate 3, thereby being pressed and fixed on the osteotomy guide base 1; the scale pressure plate 3 has a through hole at the center right position, which is assembled with the top of the front and rear movement adjustment rod 6 in a clearance fit; wherein, the rotation angle The indication is completed by the sliding scale ring 4 and the inner and outer rotation adjustment rod 5 working together: the sliding scale ring 4 is constrained by the sliding groove 1-1 of the osteotomy guide base 1 and can only be translated in the front and back direction, with a translation range of ±3mm, and the outer circumference of the sliding scale ring 4 is provided with a rotation angle scale; the top of the inner and outer rotation adjustment rod 5 is provided with an angle indicator mark, which is used to point to the scale on the sliding scale ring 4; the indication of the translation distance is completed by the scale pressure plate 3 and the front and back movement adjustment rod 6 working together: the surface of the scale pressure plate 3 is provided with a length scale corresponding to the translation distance; the top of the front and back movement adjustment rod 6 is provided with a displacement indicator mark, which is used to correspond to the length scale on the scale pressure plate 3.

[0036] During the adjustment process, when the inner and outer rotating adjustment rod 5 is rotated, its rotational motion is transmitted to the pin plate 10 through the inner and outer rotating cam 8 at the bottom. The inner and outer rotating cam 8 rotates eccentrically within the cam groove 10-1 of the pin plate 10. Due to the constraint of the cam groove 10-1, the rotational motion of the inner and outer rotating cam 8 is converted into a thrust on the groove wall, thereby driving the pin plate 10 to rotate around the center of the fan-shaped groove 11-1, with a rotation range of ±4°. The principle of this inner and outer rotating adjustment process is that the eccentric profile of the inner and outer rotating cam 8 continuously interacts with the cam groove 11-1 during the rotation process. Different sidewalls of 10-1 contact and apply pressure, thereby converting the rotational motion into the rotation of the pin plate 10 around its axis. At this time, the pin base assembly 12 does not translate, and the inner and outer rotation adjustment rod 5 rotates around its own axis. The angle indicator mark at the top of the inner and outer rotation adjustment rod 5 rotates accordingly. Since the sliding scale ring 4 is constrained by the sliding groove 1-1 and the upper scale pressure plate 3, it can only translate and cannot rotate. Therefore, the mark and the angle scale on the scale ring produce relative motion. By observing the scale value indicated by the mark, the real-time rotation angle of the pin plate 10 can be directly read.

[0037] When the forward and backward moving adjustment rod 6 is rotated, its rotational motion is transmitted to the pin base assembly 12 through the forward and backward moving cam 7 at the bottom. The forward and backward moving cam 7 rotates eccentrically in the cam groove 9-2 of the cover plate 9. Due to the constraint of the cam groove 9-2, the rotational motion of the forward and backward moving cam 7 is converted into a thrust on the groove wall, which in turn pushes the entire pin base assembly 12 to move forward and backward along the guide groove 1-5 of the osteotomy guide base 1. The translation range is ±3mm. The principle of this translation adjustment process is that the eccentric profile of the forward and backward moving cam 7 continuously contacts and applies pressure to different side walls of the cam groove 9-2 during the rotation, thereby converting the rotational motion into the linear motion of the pin base assembly 12. At this time, the inward and outward rotating adjustment rod 5 and the sliding scale ring 4 translate together with the pin base assembly 12, and the sliding scale ring 4 moves in the sliding groove 1-1. By observing the relative position of the displacement indicator mark fixed at the top of the forward and backward moving adjustment rod 6 and the length scale on the scale plate 3, the real-time translation distance of the pin base assembly 12 can be read.

[0038] The working principle of this invention: This invention combines a double cam mechanism with differentiated mechanical constraints to achieve independent and precise control of the osteotomy device in both translation and rotation degrees of freedom, as well as real-time linkage of the indicating device. Specifically, when rotating the inner and outer rotation adjustment rod 5, the inner and outer rotation cam 8 at its bottom end rotates eccentrically in the cam groove 10-1 of the pin plate 10, converting the rotational motion into a linear thrust on the groove wall, thereby driving the pin plate 10 to rotate around the center of the fan-shaped groove 11-1 within a range of ±4°. During this process, the angle indicator mark at the top of the inner and outer rotation adjustment rod 5 rotates relative to the fixed rotation angle scale on the sliding scale ring 4, thereby achieving intuitive and accurate reading of the rotation angle. When rotating the forward and backward movement adjustment rod 6, the forward and backward movement cam 7 at its bottom rotates eccentrically in the cam groove 9-2 of the cover plate 9, pushing the entire pin base assembly 12 to move linearly along the guide groove 1-5 of the osteotomy guide base 1 by ±3mm. The translational distance is indicated in real time by the relative position of the displacement indicator mark at the top of the adjustment rod with the length scale marked on the scale plate 3. This mechanism synchronously moves the rotation indicator during translation, ensuring accurate rotation angle readings at any translational position, truly achieving motion decoupling and display linkage. The invention features a compact structure and simple manufacturing; the upward-facing adjustment panel conforms to ergonomic requirements, allowing the surgeon to use a hexagonal wrench to perform bidirectional synchronous adjustment of translation and rotation from the same operating posture, significantly improving the efficiency and convenience of intraoperative operations. Combined with a bilaterally symmetrical and flip-up osteotomy groove design, it supports osteotomy operations on both left and right femurs, enhancing the overall applicability and integration of the instrument.

[0039] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A two-degree-of-freedom osteotomy device, characterized in that, include: Osteotomy guide base (1), the osteotomy guide base (1) is provided with a sliding groove (1-1), the left and right sides of the osteotomy guide base (1) are respectively provided with osteotomy grooves, and the bottom of the osteotomy guide base (1) is provided with a guide groove (1-5). The pin base assembly (12) is slidably mounted in the guide groove (1-5), and the pin base assembly (12) includes a cover plate (9), a pin plate (10) and a base (11) connected in sequence. The inner and outer rotation adjustment mechanism includes an inner and outer rotation adjustment rod (5) and an inner and outer rotation cam (8) connected to each other, wherein the inner and outer rotation cam (8) cooperates with the pin plate (10); The front-to-back movement adjustment mechanism includes a front-to-back movement adjustment rod (6) and a front-to-back movement cam (7) connected to each other, wherein the front-to-back movement cam (7) cooperates with the cover plate (9); The scale indicator device includes a sliding scale ring (4) and a scale pressure plate (3). The sliding scale ring (4) is assembled in the sliding groove (1-1), and the scale pressure plate (3) is installed on the osteotomy guide base (1).

2. The dual-degree-of-freedom osteotomy device according to claim 1, characterized in that, The osteotomy guide base (1) has a closed osteotomy groove (13) and an open osteotomy groove (14) on its left and right sides respectively; the osteotomy guide base (1) has an oblique fixing hole (15) on its left and right sides on its front side, and the osteotomy guide base (1) has a square groove (16) and a square opening groove (17) on its front and rear sides respectively.

3. The dual-degree-of-freedom osteotomy device according to claim 1, characterized in that, The osteotomy guide base (1) is provided with three circular through holes, including circular through hole one (1-2), circular through hole two (1-3) and circular through hole three (1-4).

4. The dual-degree-of-freedom osteotomy device according to claim 1, characterized in that, The pin plate (10) is disposed in the fan-shaped groove (11-1) of the base (11), and a radial positioning structure is provided between the pin plate (10) and the base (11), with gaps left at both ends of the fan-shaped groove (11-1).

5. The dual-degree-of-freedom osteotomy device according to claim 1, characterized in that, The cover plate (9) and the base (11) are connected by a plug-in structure.

6. The dual-degree-of-freedom osteotomy device according to claim 1, characterized in that, The bottom end of the inner and outer rotation adjustment rod (5) passes through the cover plate (9) and is connected to the inner and outer rotation cam (8). The inner and outer rotation cam (8) is installed in the cam groove (10-1) of the pin plate (10). The top end of the inner and outer rotation adjustment rod (5) passes through the sliding scale ring (4) and the sliding groove (1-1) in sequence, and the inner and outer rotation adjustment rod (5) rotates in cooperation with the sliding scale ring (4) and the osteotomy guide base (1).

7. The dual-degree-of-freedom osteotomy device according to claim 1, characterized in that, The bottom end of the front-to-back moving adjustment rod (6) is connected to the front-to-back moving cam (7), which is installed in the cam groove (9-2) of the cover plate (9); the top end of the front-to-back moving adjustment rod (6) is fitted into the circular through hole (1-2) with clearance fit.

8. The dual-degree-of-freedom osteotomy device according to claim 1, characterized in that, The outer circumference of the sliding scale ring (4) is provided with a rotation angle scale, and the top of the inner and outer rotation adjustment rod (5) is provided with a mark for indicating the rotation angle; the surface of the scale pressure plate (3) is provided with a length scale, and the top of the front and back movement adjustment rod (6) is provided with a mark for indicating the length scale.

9. The dual-degree-of-freedom osteotomy device according to claim 3, characterized in that, The scale plate (3) is fixed to the osteotomy guide base (1) by the clamping screw (2). The clamping screw (2) passes through the mounting hole of the scale plate (3) and is screwed into the circular through hole two (1-3) and the circular through hole three (1-4).

10. The dual-degree-of-freedom osteotomy device according to claim 6 or 7, characterized in that, Both the first cam groove (10-1) and the second cam groove (9-2) are waist-shaped grooves.

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