Tibia osteotomy template capable of achieving rotary center positioning and adjustable in angle

Abstract

The invention belongs to the technical field of instruments for knee arthroplasty, and particularly relates to a rotatable central positioning angle-adjustable tibia osteotomy template, which mainly comprises a fixed frame, an angle adjusting device, an angle adjusting device and an angle adjusting device, the guide frame is arranged in the mounting groove, an osteotomy groove is formed in the guide frame in a penetrating mode, the guide frame is provided with a first rotating track and a second rotating track relative to the fixed frame, and the axis of the first rotating track is perpendicular to the axis of the second rotating track; the first angle adjusting mechanism is connected with the fixed frame and the guide frame, and the first angle adjusting mechanism is constructed to be capable of driving the guide frame to rotate in the mounting groove along a first rotating track; the second angle adjusting mechanism is connected with the fixed frame and the guide frame, and the second angle adjusting mechanism is configured to drive the guide frame to rotate in the mounting groove along a second rotating track; and when the guide frame rotates along the first rotating track, the second angle adjusting mechanism synchronously moves along with the guide frame.

Description

Technical Field

[0001] The present invention belongs to the technical field of instruments for knee joint replacement surgery, and particularly relates to a tibial osteotomy template with rotatable center positioning and adjustable angle. Background Art

[0002] Osteotomy is the main step in knee joint replacement surgery. Obtaining a gap for accommodating the prosthesis, a neutral mechanical axis, balanced flexion and extension gaps, and balanced soft tissues during osteotomy requires not only a certain degree of accuracy but also possible adjustment according to the patient's condition. For example, when the osteotomy amount of the tibial fixation nail hole is insufficient or the osteotomy angle is incorrect, osteotomy needs to be adjusted. However, with the current traditional surgical tools, it is impossible to quantitatively increase the internal / external inclination and anterior / posterior inclination angles of the osteotomy template. In addition, it is impossible to locate the rotation center of the tibial plateau during osteotomy. Therefore, how to facilitate the doctor to locate the rotation center of the tibial plateau and accurately adjust the osteotomy angle during the operation is an urgent problem to be solved.

[0003] The present invention aims at the above problems and provides a tibial osteotomy template with rotatable center positioning and adjustable angle. Summary of the Invention

[0004] In order to overcome the problems raised in the background art, a tibial osteotomy template with rotatable center positioning and adjustable angle is provided. When in use, it can adjust the osteotomy angle according to individual differences of patients. The technical solution is as follows: It includes: a fixed frame having an installation groove; a guiding frame disposed in the installation groove, and the guiding frame is provided with an osteotomy groove therethrough. Among them, the guiding frame has a first rotation trajectory and a second rotation trajectory relative to the fixed frame, and the axis of the first rotation trajectory is perpendicular to the axis of the second rotation trajectory; a first angle adjusting mechanism connected to the fixed frame and the guiding frame, and the first angle adjusting mechanism is configured to be able to drive the guiding frame to rotate along the first rotation trajectory in the installation groove; a second angle adjusting mechanism connected to the fixed frame and the guiding frame, and the second angle adjusting mechanism is configured to drive the guiding frame to rotate along the second rotation trajectory in the installation groove; wherein, when the guiding frame rotates along the first rotation trajectory, the second angle adjusting mechanism moves synchronously with the guiding frame.

[0005] In some embodiments of the present application, the fixed frame further includes: a receiving cavity; the first angle adjustment mechanism includes: a connecting member, the connecting member is rotatably disposed in the receiving cavity, wherein when the guiding frame rotates along the first rotation trajectory, the guiding frame rotates circumferentially around the rotation axis of the connecting member; a rotating shaft, the rotating shaft is rotatably connected to the connecting member, wherein one end of the rotating shaft is connected to the guiding frame, and when the guiding frame rotates along the second rotation trajectory, the guiding frame rotates axially with the axis of the rotating shaft as a reference; a rotating member, the rotating member is connected to the connecting member and can rotate axially relative to the fixed frame, wherein when the rotating member rotates around its axis, the connecting member rotates synchronously with the rotating member, so that the guiding frame rotates along the first rotation trajectory with the axis of the rotating member as a reference.

[0006] Further, the connecting member includes: a bottom plate and a connecting section, the bottom plate and the connecting section are integrally connected, wherein the bottom plate has a first side wall and a second side wall, the first side wall is rotatably connected to the inner surface of the receiving cavity, and the rotating member is fixedly connected to the second side wall of the bottom plate.

[0007] In some embodiments of the present application, the fixed frame further includes: a chute, wherein the chute communicates with the receiving cavity; and a brake plate, the brake plate is disposed in the chute and can move in the chute towards the rotating member to abut against the rotating member, so that the rotating member cannot rotate relative to the fixed frame, and away from the rotating member in the chute, so that the rotating member can rotate relative to the fixed frame; and a first spring, disposed around the outer surface of the brake plate to always push the brake plate towards the rotating member.

[0008] Further, a plurality of card slots are provided on the outer surface of the rotating member, wherein one end of the brake plate extends into one of the card slots under the action of the first spring.

[0009] Further, the plurality of card slots are circumferentially distributed on the outer surface of the rotating member around the axis of the rotating member.

[0010] Further, the angle between adjacent card slots is 1°.

[0011] In some embodiments of the present application, the second angle adjustment mechanism includes: a fixed sleeve, one end of the fixed sleeve is connected to the guiding frame, and the fixed sleeve is coaxial with the rotating shaft; wherein, a rotatable limiting member is arranged at the other end of the fixed sleeve; an adjusting rod, the adjusting rod includes a first end and a second end, the first end is located inside the fixed sleeve, and the second end extends out of the fixed sleeve, wherein the adjusting rod can move closer to or away from the guiding frame in the length extension direction of the fixed sleeve, so that the second end can abut against the outer surface of the limiting member; a second spring, arranged inside the fixed sleeve and wound around the outer wall of the adjusting rod, wherein under the action of the second spring, the second end always abuts against the outer surface of the limiting member.

[0012] Further, the cross-section of the fixed sleeve is rectangular, wherein the cross-section of the adjusting rod is the same as that of the fixed sleeve.

[0013] In some embodiments of the present application, the fixed frame further has at least two positioning holes, wherein the positioning holes are located below the installation groove in the height direction of the fixed frame.

[0014] Further, the two positioning holes are mirror-symmetric to each other.

[0015] Advantages of the present invention:

[0016] 1. By providing the fixed frame, the guiding frame, the first angle adjustment mechanism and the second angle adjustment mechanism, during use, through the first angle adjustment mechanism and the second angle adjustment mechanism, the guiding frame can be rotated along the first rotation trajectory or the second rotation trajectory in the installation groove. Among them, through the first angle adjustment mechanism, the guiding frame rotates along the first rotation trajectory, and the guiding frame inclines inwards or outwards relative to the patient's tibia in the installation groove. Correspondingly, through the second angle adjustment mechanism, the guiding frame rotates along the second rotation trajectory, and the guiding frame inclines forwards or backwards relative to the patient's tibia in the installation groove. Thus, the osteotomy angle can be adjusted during the operation, so as to facilitate the surgeon to accurately adjust the osteotomy angle during the operation.

[0017] 2. By setting the brake plate to cooperate with the rotating member of the first angle adjustment mechanism, during use, the brake plate always extends into a card slot on the rotating member under the action of the spring, so that the guiding frame can maintain its own angle in the installation slot without change, facilitating the surgeon to perform osteotomy on the patient through the osteotomy groove. And after moving the brake plate away from the rotating member, by rotating the rotating member, the guiding frame inclines inwards or outwards in the installation slot, and then under the action of the spring, one end of the brake plate is inserted into a card slot again, thereby fixing the adjusted angle of the guiding frame on the first rotation trajectory; thus avoiding the rotation of the guiding frame on the first rotation trajectory during use.

[0018] 3. By setting the second angle adjustment mechanism of the fixed sleeve, the adjusting rod and the second spring, during use, first pull the adjusting rod to make the second end of the adjusting rod away from the limiting member on the fixed sleeve, and then rotate the adjusting rod to drive the guiding frame to rotate along the second rotation trajectory in the installation slot, so that the guiding frame inclines forwards or backwards relative to the patient's tibia in the installation slot, thereby adjusting the osteotomy angle. And after the adjustment is completed, by stopping applying force to the adjusting rod, the second end of the adjusting rod abuts against the outer surface of the limiting member again under the action of the second spring, thereby forming a fixed state after the angle adjustment of the guiding frame, thus avoiding the rotation of the guiding frame on the second rotation trajectory during use.

[0019] 4. By means of the brake plate, the first spring, the adjusting rod and the second spring, during use, it can fix the guiding frame on the first rotation trajectory and the second rotation trajectory respectively, thus avoiding the change of the forward / backward inclination angle during the osteotomy process after the guiding frame inclines inwards / outwards, and vice versa, avoiding the change of the inwards / outwards inclination angle during the osteotomy process after the guiding frame inclines forwards / backwards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the fixed frame structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the guiding frame structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the outward inclination state of the osteotomy groove of the present invention;

[0024] Figure 5 It is a schematic diagram of the outward inclination state of the osteotomy groove of the present invention;

[0025] Figure 6 It is a schematic diagram of the forward inclination state of the osteotomy groove of the present invention;

[0026] Figure 7 Schematic diagram of the posterior inclination state of the osteotomy groove for the name of the present invention;

[0027] Figure 8 Schematic diagram of the position of the rotating member for the name of the present invention;

[0028] Figure 9 Schematic diagram of the connection of the connecting member, the rotating shaft and the rotating member for the name of the present invention;

[0029] Figure 10 Schematic diagram of the structure of the connecting member for the name of the present invention;

[0030] Figure 11 Schematic diagram of the structure of the adjusting rod for the name of the present invention;

[0031] Figure 12 Schematic diagram of the structure of the fixed sleeve for the name of the present invention;

[0032] Figure 13 Schematic diagram of the structure of the positioning rod for the name of the present invention;

[0033] Figure 14 Schematic diagram of the structure of the positioning screw for the name of the present invention;

[0034] Figure 15 Schematic diagram of the structure of the positioning screw screwed into the tibia for the name of the present invention;

[0035] In the figure, 1, fixed frame; 11, installation groove; 12, positioning hole; 13, accommodation cavity; 14, sliding groove; 15, brake plate; 16, first duct; 2, guiding frame; 21, osteotomy groove; 22, first groove; 23, second groove; 3, connecting member; 31, rotating shaft; 32, rotating member; 4, fixed sleeve; 41, adjusting rod; 42, second spring; 5, positioning rod; 6, positioning screw. Specific embodiments

[0036] The following describes clearly and completely the technical solutions in the embodiments of the present invention through specific specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Without conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0037] Figure 1—2 shows the main technical content of this embodiment. This specific embodiment provides a rotatable center positioning and angle adjustable tibial osteotomy template, which includes: a fixed frame 1, the fixed frame 1 has a mounting groove 11; a guiding frame 2, disposed in the mounting groove 11, the guiding frame 2 is provided with an osteotomy groove 21 therethrough. Wherein, the guiding frame 2 has a first rotation trajectory and a second rotation trajectory relative to the fixed frame 1, and the axis of the first rotation trajectory is perpendicular to the axis of the second rotation trajectory; a first angle adjusting mechanism, connected to the fixed frame 1 and the guiding frame 2, wherein the first angle adjusting mechanism is configured to be able to drive the guiding frame 2 to rotate along the first rotation trajectory in the mounting groove 11; a second angle adjusting mechanism, connected to the fixed frame 1 and the guiding frame 2, wherein the second angle adjusting mechanism is configured to drive the guiding frame 2 to rotate along the second rotation trajectory in the mounting groove 11; wherein, when the guiding frame 2 rotates along the first rotation trajectory, the second angle adjusting mechanism moves synchronously with the guiding frame 2.

[0038] During use, the fixed frame 1 is assembled at a position close to the proximal end of the patient's tibia. According to the bone surface condition of the patient's tibial proximal end, when it is necessary to change the inner / outer inclination angle of the osteotomy groove 21 of the guiding frame 2, the guiding frame 2 is rotated along the first rotation direction by the first angle adjusting mechanism. At this time, in the height extension direction of the fixed frame 1, the horizontal heights of both ends of the osteotomy groove 21 change, thereby making the osteotomy groove 21 present an inner inclination or an outer inclination relative to the patient's tibia; similarly, when it is necessary to change the anterior / posterior inclination angle of the osteotomy groove 21 of the guiding frame 2, for example, when the posterior inclination angle changes, the guiding frame 2 is rotated along the second rotation direction by the second angle adjusting mechanism. At this time, the upper edge of the guiding frame 2 inclines towards the patient's tibia, and the lower edge of the guiding frame 2 inclines towards the direction away from the tibia, so as to realize that the osteotomy groove 21 corresponds to the target osteotomy area according to the individual differences between different patients.

[0039] As can be understood by those skilled in the art, referring to Figure 3 , the fixed frame 1 also has positioning holes 12. When in use, a Kirschner wire is passed through the positioning holes 12 to fix the fixed frame 1 to the proximal end of the patient's tibia; referring to the figure, the positioning holes 12 are set to two to avoid rotation of the fixed frame 1 relative to the patient's tibia during use. The positioning holes 12 are located below the mounting groove 11 in the height direction of the fixed frame 1. When in use, after passing through the positioning holes 12 with a Kirschner wire, it is nailed into the patient's tibia to fix the fixed frame 1 on the patient's tibia; as can be understood by those skilled in the art, the positioning holes 12 can also be set to multiple, and the multiple positioning holes 12 are arranged in a row in the length direction of the fixed frame 1 or are arranged in an up-and-down staggered manner below the mounting groove 11.

[0040] Reference Figure 3 —5 and Figure 8 —9, in this embodiment, the fixed frame 1 further includes: a receiving cavity; wherein, the receiving cavity is in communication with the mounting groove 11, and most of the first angle adjustment mechanism is assembled in the receiving cavity. Specifically, the first angle adjustment mechanism includes: a connecting member 3, a connecting member 3, and a rotating member 32. The connecting member 3 is rotatably disposed in the receiving cavity. When the guiding frame 2 rotates along the first rotation trajectory, the guiding frame 2 rotates circumferentially around the rotation axis of the connecting member 3; the rotating shaft 31 is rotatably connected to the connecting member 3, and one end of the rotating shaft 31 is connected to the guiding frame 2. When the guiding frame 2 rotates along the second rotation trajectory, the guiding frame 2 rotates axially with the axis of the rotating shaft 31 as a reference; the rotating member 32 is connected to the connecting member 3 and can rotate axially relative to the fixed frame 1. When the rotating member 32 rotates around its axis, the connecting member 3 rotates synchronously with the rotating member 32, so that the guiding frame 2 rotates along the first rotation trajectory with the axis of the rotating member 32 as a reference. In use, by rotating the rotating member 32, at this time, the connecting member 3 rotates driven by the rotating member 32, and then drives the guiding frame 2 to rotate in the mounting groove 11. Specifically, for example, when the fixed frame 1 is fixed to the left tibia of the patient, when the rotating member 32 is rotated clockwise, at this time, the end of the guiding frame 2 away from the rotating member 32 moves downward, so that the osteotomy groove 21 is in an inclined state inward relative to the patient's tibia; conversely, when the end of the guiding frame 2 away from the rotating member 32 moves upward, the osteotomy groove 21 is in an inclined state outward relative to the patient's tibia.

[0041] Reference Figure 10 , specifically, the connecting member 3 includes: a bottom plate and a connecting section, and the bottom plate and the connecting section are integrally connected. The bottom plate has a first side wall and a second side wall. The first side wall is hinged to the inner surface of the receiving cavity, and the rotating member 32 is fixedly connected or integrally connected to the second side wall of the bottom plate.

[0042] Reference Figure 8—10, in this embodiment, the fixed frame 1 further includes: a chute 14, wherein the chute 14 communicates with the accommodation cavity; further included is a brake plate 15 disposed within the chute 14 and capable of moving within the chute 14 towards the rotating member 32 to abut against the rotating member 32, such that the rotating member 32 cannot rotate relative to the fixed frame 1, and away from the rotating member 32 within the chute 14, such that the rotating member 32 can rotate relative to the fixed frame 1; during use, through the brake plate 15, the rotating member 32 can be restricted, thereby preventing the rotating member 32 from rotating relative to the fixed frame 1, so that when the guiding frame 2 is in use, its angle will not deflect; at the same time, a first spring is also provided, which is disposed around the outer surface of the brake plate 15 to push the brake plate 15 towards the rotating member 32 at all times, thereby maintaining an engagement relationship between the brake plate 15 and the rotating member 32 at all times. When the brake plate 15 is pushed away from the rotating member 32, the first spring is compressed. At this time, the brake plate 15 is separated from the rotating member 32, and thus the rotating member 32 can rotate to adjust the angle of the osteotomy groove 21; conversely, when the force applied to the brake plate 15 is stopped, the first spring expands, and the brake plate 15 forms an engagement relationship with the rotating member 32 again under the action of the first spring, thereby fixing the position and pose of the guiding frame 2 within the mounting groove 11.

[0043] Specifically, a plurality of card slots are provided on the outer surface of the rotating member 32. One end of the brake plate 15 extends into a card slot under the action of the spring. Each card slot is circumferentially distributed on the outer surface of the rotating member 32 around the axis of the rotating member 32. Preferably, the angle between adjacent card slots is 1°. During use, through the card slots, the rotation amount of the rotating member 32 can be 1° each time, thereby facilitating the operator to precisely control the osteotomy angle.

[0044] Preferably, a first scale groove with a unit of 1° is provided at one end of the rotating member 32 away from the connecting member 3. A first indication mark is provided on the outer surface of the fixed frame 1. During use, through the indication of the first indication mark, it is convenient for the operator to quantitatively rotate the rotating member 32, thereby precisely adjusting the inner / outer inclination angle of the osteotomy groove 21 to ensure that the proximal tibia after osteotomy is parallel to the ground, and further avoiding the osteotomy surface of the tibia affecting the extension gap and flexion gap of the knee joint prosthesis after total knee arthroplasty for the patient.

[0045] Reference Figure 6 —7 and Figure 11—13, in this embodiment, the second angle adjustment mechanism includes: a fixed sleeve 4, an adjustment rod 41, and a second spring 42. One end of the fixed sleeve 4 is connected to the guiding frame 2, and the fixed sleeve 4 is coaxial with the rotating shaft 31. Among them, the other end of the fixed sleeve 4 is provided with a rotatable limiting member. The adjustment rod 41 includes a first end and a second end. The first end is located inside the fixed sleeve 4, and the second end extends out of the fixed sleeve 4. Among them, the adjustment rod 41 can approach or move away from the guiding frame 2 in the length extension direction of the fixed sleeve 4, so that the second end can abut against the outer surface of the limiting member. The second spring 42 is arranged inside the fixed sleeve 4 and wound around the outer wall of the adjustment rod 41. Among them, under the action of the second spring 42, the second end always abuts against the outer surface of the limiting member. During use, by rotating the adjustment rod 41, the guiding frame 2 rotates synchronously with the adjustment rod 41, thereby changing the anterior / posterior tilt angle of the guiding frame 2 and the osteotomy groove 21. Furthermore, after osteotomy is performed on the patient, the osteotomy plane is parallel to the ground in the patient's standing state, avoiding the influence on the flexion gap of the knee joint prosthesis. Specifically, when the anterior / posterior tilt angle of the osteotomy groove 21 needs to be adjusted, a force is applied to the adjustment rod 41 to make the second end of the adjustment rod 41 move away from the limiting member. At this time, the second spring 42 is compressed, and then the adjustment rod 41 is rotated, so that the guiding frame 2 rotates synchronously with the adjustment rod 41, thereby changing the angle of the osteotomy groove 21 relative to the patient's tibia. Specifically, when the adjustment rod 41 is rotated clockwise, the upper edge of the guiding frame 2 approaches the patient's tibia, and the lower edge of the guiding frame 2 moves away from the patient's tibia. At this time, the osteotomy groove 21 presents a posterior tilt state; on the contrary, when the adjustment rod 41 is rotated counterclockwise, the upper edge of the guiding frame 2 moves away from the patient's tibia, and the lower edge of the guiding frame 2 approaches the patient's tibia. At this time, the osteotomy groove 21 presents an anterior tilt state. After the force applied to the adjustment rod 41 is stopped, the second end of the adjustment rod 41 fits against the outer surface of the limiting member again under the action of the second spring 42.

[0046] As Figure 10 —12 shows, at one end of the fixed frame 1 away from the rotating member 32, a limiting groove is provided. Among them, the limiting member is slidably arranged in the limiting groove, and the second end of the adjustment rod 41 extends out of the limiting groove.

[0047] Specifically, the fixed sleeve 4 has an inner cavity, and the cross-section of its inner cavity is rectangular. Among them, the cross-section of the adjustment rod 41 is the same as the cross-section of the inner cavity. In this setting method, it can be realized that when the adjustment rod 41 rotates, the guiding frame 2 can rotate with the adjustment rod 41.

[0048] Reference Figure 11—12. Preferably, a baffle is arranged at the first end of the adjusting rod 41, and a retaining ring is arranged in the inner cavity at the port far from the guiding frame 2. One end of the second spring 42 abuts against the baffle, and the other end of the second spring 42 abuts against the retaining ring, so that the second end of the adjusting rod 41 always abuts against the outer surface of the limiting member, and further, during the osteotomy operation, the guiding frame 2 changes the angle relative to the fixed frame 1 on the second rotation track.

[0049] Preferably, a second indication mark is arranged on the outer surface of the limiting member, and a second scale groove is arranged at the second end of the adjusting rod 41. Similarly, the unit of the first scale groove is 1°. During use, through the indication of the first indication mark, it is convenient for the surgeon to quantitatively rotate the adjusting rod 41 to accurately adjust the front / rear tilt angle of the osteotomy groove 21.

[0050] As can be understood by those skilled in the art, the guiding frame 2 can be tilted forward / backward or inward / outward relative to the patient's tibia through the first angle adjusting mechanism and the second adjusting mechanism at the same time.

[0051] Reference Figure 13—14, in this embodiment, a first channel 16 is provided penetrating from the top end face to the bottom end face of the fixed frame 1. A second channel is provided penetrating from the top end face to the bottom end face of the guiding frame 2. More specifically, the axis of the first channel 16 is perpendicular to the top end face of the fixed frame 1, and the first axis of the first channel 16 passes through the midpoint of the top end face of the fixed frame 1. When the guiding frame 2 does not rotate along the first rotation trajectory and the second rotation trajectory (i.e., the initial state), the second channel is coaxial with the first channel 16. Among them, a positioning rod 5 is inserted from the top end face to the bottom end face of the fixed frame 1 into the first channel 16 and the second channel, so that the guiding frame 2 cannot move relative to the fixed frame 1. In use, first insert the positioning rod 5 into the first channel 16 and the second channel. When the fixed frame 1 is fixed on the patient's tibia, at this time, the axis of the positioning rod 5 is parallel to the tibial anatomical axis, so that the positioning rod 5 is convenient for assisting medical staff to determine the rotation center of the tibial plateau; after determining the rotation center through the positioning rod 5, withdraw the positioning rod 5 from the first channel 16 and the second channel, which is convenient for the surgeon to perform subsequent surgical operations; more specifically, the positioning rod 5 has a blocking plate. Among them, the diameter of the blocking plate is larger than the diameter of the first channel 16. In use, the blocking plate fits with the top end face of the fixed frame 1, so as to prevent the positioning rod 5 from slipping out of the first channel 16 after the positioning rod 5 is inserted into the first channel 16 and the second channel; in addition, after the positioning rod 5 is separated from the fixed frame 1 and the guiding frame 2, when the guiding frame 2 changes the angle of forward / backward tilt or internal / external tilt, the corresponding relationship between the axes of the first channel 16 and the second channel can also be used to compare the states before and after the angle adjustment of the osteotomy groove 21.

[0052] Furthermore, referring to Figure 14—15, the osteotomy groove 21 has a first long-side side wall and a second long-side side wall that face each other. Among them, a first groove 22 is formed on the first long-side side wall, and a second groove 23 is formed on the second long-side side wall. Moreover, the first groove 22 and the second groove 23 are mirror-symmetrical to each other. More specifically, the inner surfaces of both the first groove 22 and the second groove 23 are arc-shaped surfaces, and the inner surfaces of the first groove 22 and the second groove 23 are concentric. When in use, after the positioning rod 5 is disassembled from the fixing frame 1 and the wire frame and before / after the anterior / posterior inclination and the internal / external inclination of the osteotomy groove 21 are adjusted, the positioning screw 6 is screwed into the patient's tibia along the depth direction of the osteotomy groove 21 after passing through the first groove 22 and the second groove 23. Referring to the figure, there is no connection relationship between the positioning screw 6 and the guiding frame 2. In this operation mode, the positioning screw 6 is equivalent to establishing a reference point on the bone surface of the patient's tibia. Furthermore, after the anterior / posterior inclination and the internal / external inclination angles of the osteotomy groove 21 change, the state before and after the angle adjustment of the osteotomy groove 21 is compared through the corresponding relationship between the positioning screw 6 and the first groove 22 and the second groove 23.

[0053] The usage method of the present invention:

[0054] 1. After inserting the positioning rod into the first channel and the second channel, then use a Kirschner wire to pass through the positioning holes of the fixing frame and nail it into the patient's tibia, thereby fixing the fixing frame on the patient's tibia and determining the rotation center of the patient's tibia through the positioning rod.

[0055] 2. After the positioning rod is disassembled from the fixing frame and the wire frame, use the positioning screw to screw into the patient's tibia along the depth direction of the osteotomy groove after passing through the first groove and the second groove. At this time, the positioning screw is equivalent to establishing a reference point on the bone surface of the patient's tibia. Furthermore, after the anterior / posterior inclination and the internal / external inclination angles of the osteotomy groove change, the state before and after the angle adjustment of the osteotomy groove is compared through the corresponding relationship between the positioning screw and the first groove and the second groove.

[0056] 3. When it is necessary to change the internal / external inclination angle of the osteotomy groove of the guiding frame, make the guiding frame rotate along the first rotation track through the first angle adjustment mechanism. At this time, in the height extension direction of the fixing frame, the horizontal heights of both ends of the osteotomy groove change, thereby making the osteotomy groove present an internal inclination or an external inclination relative to the patient's tibia.

[0057] 4. When the osteotomy groove requiring the guiding frame undergoes a change in the anterior / posterior tilt angle, for example, when the posterior tilt angle changes, the guiding frame is rotated along the second rotation trajectory by the second angle adjustment mechanism. At this time, the upper edge of the guiding frame tilts towards the patient's tibia, and the lower edge of the guiding frame tilts away from the tibia, so as to achieve individualized differences among different patients and make the osteotomy groove correspond to the target osteotomy area.

[0058] The description of the above embodiments is only for understanding the present invention. It should be noted that for those of ordinary skill in the art, several improvements can be made to the present invention without departing from the principle of the present invention, and these improvements will also fall within the protection scope of the claims of the present invention.

Claims

1. A tibial osteotomy template with rotatable center positioning and adjustable angle, characterized in that: It includes a fixed frame, wherein the fixed frame has a mounting groove; A guide frame is disposed in the installation groove, and an osteotomy groove is provided through the guide frame, wherein the guide frame has a first rotation track and a second rotation track relative to the fixed frame, and the axis of the first rotation track is perpendicular to the axis of the second rotation track; a first angle adjustment mechanism connected to the fixed frame and the guide frame, wherein the first angle adjustment mechanism is configured to drive the guide frame to rotate in the mounting groove along the first rotation trajectory; a second angle adjustment mechanism connected to the fixed frame and the guide frame, wherein the second angle adjustment mechanism is configured to drive the guide frame to rotate along the second rotation trajectory in the mounting groove; Wherein, when the guide frame rotates along the first rotation trajectory, the second angle adjustment mechanism moves synchronously with the guide frame.

2. The rotatable center-positioned, angle-adjustable tibial osteotomy template according to claim 1, characterized in that: The fixed frame further comprises: a receiving cavity; The first angle adjustment mechanism comprises: A connecting member, the connecting member being rotatably disposed in the accommodating cavity, wherein when the guide frame rotates along the first rotation trajectory, the guide frame rotates circumferentially around the rotation axis of the connecting member; a rotating shaft, the rotating shaft being rotatably connected to the connecting member, wherein one end of the rotating shaft is connected to the guide frame, and when the guide frame rotates along the second rotation trajectory, the guide frame performs axial rotation based on the axis of the rotating shaft; A rotating member, which is connected to the connecting member and can rotate axially relative to the fixed frame, wherein when the axis of the rotating member rotates, the connecting member rotates synchronously with the rotating member, so that the guide frame rotates along the first rotation trajectory with the axis of the rotating member as a reference.

3. The rotatable center-positioned, angle-adjustable tibial osteotomy template according to claim 2, characterized in that: The connecting member includes: a base plate and a connecting section, the base plate and the connecting section are integrally connected, wherein the base plate has a first side wall and a second side wall, the first side wall is rotatably connected to the inner surface of the accommodating cavity, and the rotating member is fixedly connected to the second side wall of the base plate.

4. The rotatable center-positioned, angle-adjustable tibial osteotomy template according to claim 2, characterized in that: The fixing frame further comprises: a slide groove, wherein the slide groove is communicated with the accommodating cavity; and a brake plate, the brake plate being disposed in the slide slot and being able to move in the slide slot toward the rotating member to abut against the rotating member so that the rotating member cannot rotate relative to the fixed frame, and being away from the rotating member in the slide slot so that the rotating member can rotate relative to the fixed frame; and The first spring is arranged around the outer surface of the brake plate to push the brake plate to always move toward the rotating member.

5. The rotatable center-positioned, angle-adjustable tibial osteotomy template according to claim 4, characterized in that: The outer surface of the rotating member is provided with a plurality of slots, wherein one end of the brake plate extends into one of the slots under the action of the first spring.

6. The rotatable center-positioned, angle-adjustable tibial osteotomy template according to claim 5, characterized in that: A plurality of the clamping grooves are distributed on the outer surface of the rotating member in a circumferential direction around the axis of the rotating member.

7. The rotatable center-positioned, angle-adjustable tibial osteotomy template according to claim 6, characterized in that: The angle between adjacent card slots is 1°.

8. The rotatable center-positioned, angle-adjustable tibial osteotomy template according to claim 2, characterized in that: The second angle adjustment mechanism comprises: A fixed sleeve, one end of which is connected to the guide frame, and the fixed sleeve is coaxial with the rotating shaft; wherein a limiting member is disposed at the other end of the fixed sleeve; an adjusting rod, the adjusting rod comprising a first end and a second end, the first end being located in the fixing sleeve, the second end extending from the fixing sleeve, wherein the adjusting rod can approach or move away from the guiding frame in the length extension direction of the fixing sleeve, so that the second end can abut against the outer surface of the limiting member; The second spring is disposed in the fixing sleeve and is wound around the outer wall of the adjusting rod, wherein, under the action of the second spring, the second end is always against the outer surface of the limiting member.

9. The rotatable center-positioned, angle-adjustable tibial osteotomy template according to claim 8, characterized in that: The cross section of the fixing sleeve is rectangular, wherein the cross section of the adjusting rod is the same as the cross section of the fixing sleeve.

10. The rotatable center-positioned, angle-adjustable tibial osteotomy template according to claim 1, characterized in that: The fixing frame further has at least two positioning holes, wherein the positioning holes are located below the mounting groove in the height direction of the fixing frame.

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