A bone cut guide in knee replacement surgery navigation and method of use thereof

Abstract

The application provides a bone-cutting guide for knee joint replacement surgery navigation and a use method thereof. The bone-cuting guide comprises: a navigation array for calibrating the position of a saw blade in a navigation system; a saw blade fixing seat for fixing a bone needle and mounting the saw blade; a first direction adjusting structure for adjusting the movement of the saw blade fixing seat; and a bone needle for being fixed in a bone needle hole of the saw blade fixing seat. Compared with the prior art, the application can realize accurate positioning of the angle and position of bone cutting by calibrating the position of the saw blade in the navigation system in time. Compared with the scheme in which a doctor uses a traditional surgical tool to perform bone cutting, the bone-cuting guide and the bone-cutting method have high position accuracy and depend less on the experience of the doctor, and compared with the scheme in which bone cutting is performed by cooperation of full intelligent navigation technology and a mechanical arm, the application does not need the participation of the mechanical arm, the operation steps are simple, and the surgical cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical technology, specifically to an osteotomy guide for knee replacement surgery navigation and its usage method. Background Technology

[0002] Knee replacement surgery, as a treatment for conditions such as osteoarthritis, has been performed clinically for many years. The market primarily focuses on surface knee replacement surgery, which involves osteotomizing the femur and tibia to remove the diseased portion before placing an artificial knee joint prosthesis. Osteotomy tools are crucial surgical instruments, and the following two methods are commonly used for osteotomy:

[0003] 1. Relying on the doctor's experience and using traditional surgical tools to determine various osteotomy parameters, the entire surgery is highly dependent on the doctor's experience when using traditional surgical tools, and problems such as osteotomy angle deviation and position deviation often occur.

[0004] 2. Navigation technology is used to locate the relevant positions of the femur and tibia in the knee joint, and the movement of the robotic arm is controlled by a program to drive the saw blade for osteotomy. However, when using fully intelligent navigation technology in conjunction with the robotic arm for osteotomy, the accuracy of the robotic arm's movement will affect the final osteotomy angle and thickness deviation. At the same time, the entire process is completed entirely by the robotic arm, and the position cannot be manually adjusted. In addition, the robotic arm needs to occupy a lot of space when it moves, and it needs to be matched with a specific ward, resulting in high surgical costs. Summary of the Invention

[0005] The purpose of this invention is to provide an osteotomy guide for knee replacement surgery navigation and its usage method, so as to overcome the shortcomings of the prior art described in the background section.

[0006] To achieve the above objectives, the present invention employs the following technical solution: In a first aspect, the present invention provides an osteotomy guide for knee replacement surgery navigation, comprising:

[0007] A navigation array, comprising an array body and an array fixing shell, wherein the array body has at least three reflectors for marking the position of the navigation array in the navigation system, and the array fixing shell has a U-shaped structure;

[0008] A saw blade holder, wherein the saw blade holder has a bone needle hole for fixing bone needles and a saw blade groove for saw blade operation;

[0009] The first direction adjustment structure, which consists of a left adjustment structure, a right adjustment structure, a middle adjustment structure and a positioning plate, is used to adjust the movement of the saw blade fixing seat along the first direction, which is the anteroposterior tilt direction relative to the femoral model or the tibia model.

[0010] Bone pin, the bone pin being used to fix the saw blade fixing seat in the bone pin hole;

[0011] The navigation array is connected and fixed to the saw blade mounting base and can be quickly disassembled. The first direction adjustment structure is connected and fixed to the saw blade mounting base and can be quickly disassembled.

[0012] Furthermore, the saw blade fixing seat has two bosses on its side, and the array fixing housing U-shaped structure has magnet fixing parts at both ends. The magnet fixing parts have boss grooves for cooperating with the bosses of the saw blade fixing seat.

[0013] Furthermore, the boss of the saw blade holder is made of a magnetic material, and a magnet is installed inside the magnet fixing component. When the boss groove on the magnet fixing component mates with the boss of the saw blade holder, the magnet inside the magnet fixing component simultaneously generates a magnetic attraction with the boss of the saw blade holder, thereby achieving a tight connection between the navigation array and the saw blade holder.

[0014] Furthermore, the left and right adjustment structures of the first direction adjustment structure are respectively fixed at both ends of the middle adjustment structure, and the positioning plate is fixed at the lower end of the middle adjustment structure.

[0015] Furthermore, the saw blade fixing seat is also provided with a positioning plate limiting groove. The positioning plate in the first direction adjustment structure is used to cooperate with the positioning plate limiting groove, which can restrict the relative movement between the first direction adjustment structure and the saw blade fixing seat, so that the first direction adjustment structure can only move along the direction of the slot of the positioning plate limiting groove.

[0016] Furthermore, spring beads are respectively provided on the inner sides of the left and right adjustment structures of the first direction adjustment structure, and arc-shaped grooves matching the spring beads are provided on both sides of the saw blade fixing seat. When the first adjustment mechanism moves along the direction of the slot of the positioning plate limiting groove, the spring beads move into the arc-shaped groove of the saw blade fixing seat. Under the action of elastic force, the spring beads on both sides clamp the saw blade fixing seat, thereby achieving complete fixation of the first direction adjustment structure and the saw blade fixing seat.

[0017] Furthermore, the saw blade holder is also provided with bone needle holes, which are divided into three types: first bone needle hole, second bone needle hole and third bone needle hole, and at least one of each of the first bone needle hole, second bone needle hole and third bone needle hole is provided.

[0018] Furthermore, the first and second bone needle holes are axially parallel to the slotting direction of the positioning plate limiting groove, and the third bone needle hole has a certain inclination angle, with its axial angle being 5-25° with the axial angle of the first and second bone needle holes.

[0019] Secondly, the present invention also provides a method for using an osteotomy guide in knee replacement surgery navigation, comprising the following steps:

[0020] Step 1: According to the osteotomy guide in the knee replacement surgery navigation described above, fix the navigation array, the saw blade fixing seat, and the first direction adjustment structure, and install the saw blade in the saw blade groove of the saw blade fixing seat;

[0021] Step 2: Rotate the first direction adjustment structure along the first direction. The navigation system provides real-time feedback on the position of the saw blade groove. When the first direction angle is rotated to the target position, stop rotating and insert the first bone needle along the first bone needle hole for fixation. At this time, the angle of the osteotomy guide in the first direction is fixed accordingly.

[0022] Step 3: Rotate the osteotomy guide along the second direction, which is the circumferential position of the first bone needle. The navigation system provides real-time feedback on the position of the saw blade groove. When the second direction angle is rotated to the target position, stop rotating and insert the second bone needle along the second bone needle hole for fixation. At this time, the angle of the osteotomy guide in the second direction is fixed accordingly.

[0023] Step 4: As the first and second bone pins are fixed in the first and second bone pin holes respectively, the osteotomy guide can only move up and down along the axial direction. When the bottom surface of the osteotomy guide is in contact with the femoral or tibial model, that is, when the osteotomy guide can no longer move downward along the axial direction, the third bone pin is inserted along the third bone pin hole. At this time, the axial movement direction of the osteotomy guide is fixed, thereby achieving complete fixation of the osteotomy guide and the femoral or tibial model.

[0024] Step 5: Perform osteotomy on the femoral or tibial model. During this process, the position of the reflector on the navigation array can be marked by the navigation system. Through physical space conversion, the position of the saw blade fixed seat can be marked, thereby achieving precise positioning of the osteotomy angle and position.

[0025] This invention provides an osteotomy guide for knee replacement surgery navigation and its usage method, which has the following technical advantages compared with the prior art:

[0026] 1. The first direction adjustment structure and the saw blade fixing seat, as well as the navigation array and the saw blade fixing seat, are simple to cooperate with, securely fixed and easy to disassemble, which is convenient for doctors to operate. In addition, by adjusting the position of the first direction adjustment structure and the saw blade fixing seat, the position and angle of osteotomy can be adjusted.

[0027] 2. By calibrating the position of the saw blade in a timely manner through the navigation system, the angle and position of the osteotomy can be accurately located. Compared with the method of doctors using traditional surgical tools to perform osteotomy, the osteotomy guide and osteotomy method described in this invention have high positional accuracy and rely less on the doctor's experience. Compared with the method of osteotomy performed with the cooperation of fully intelligent navigation technology and robotic arms, this invention does not require the participation of robotic arms, the operation steps are simple, and the surgical cost is reduced. Attached Figure Description

[0028] The features, advantages and technical effects of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0029] Figure 1 This is an assembly diagram of the osteotomy guide provided in the first embodiment of the present invention;

[0030] Figure 2 This is an exploded view of the osteotomy guide provided in the first embodiment of the present invention at one angle;

[0031] Figure 3 This is a cross-sectional view of the navigation array mounting housing provided in the first embodiment of the present invention;

[0032] Figure 4 This is an assembly diagram of the navigation array and saw blade mounting base provided in the first embodiment of the present invention;

[0033] Figure 5 This is an exploded view of the osteotomy guide provided in the second embodiment of the present invention at one angle;

[0034] Figure 6 This is an assembly diagram of the osteotomy guide provided in the second embodiment of the present invention;

[0035] Figure 7 This is an assembly diagram of the osteotomy guide provided in the third embodiment of the present invention;

[0036] Explanation of reference numerals in the attached drawings: 1. Navigation array; 2. Saw blade holder; 3. First direction adjustment structure; 4. Bone needle; 5. Screw; 11. Array body; 12. Array fixing shell; 13. Magnet fixing component; 14. Boss groove; 15. Magnet; 21. Bone needle hole; 22. Saw blade groove; 23. Boss; 24. Positioning plate limiting groove; 25. Arc-shaped groove; 26. Cylinder; 27. Magnet holder; 28. Second magnet; 31. Left adjustment structure; 32. Right adjustment structure; 33. Middle adjustment structure; 34. Positioning plate; 35. Spring bead; 36. Groove; 37. Contouring boss; 211. First bone needle hole; 212. Second bone needle hole; 213. Third bone needle hole. Detailed Implementation

[0037] The features and exemplary embodiments of various aspects of this disclosure will now be described in detail. To make the objectives, technical solutions, and advantages of this disclosure clearer, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended to explain this disclosure only and not to limit it. For those skilled in the art, this disclosure can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this disclosure by illustrating examples.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0039] In this document, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] To better understand the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] In a first aspect, the present invention provides an osteotomy guide for knee replacement surgery navigation, the specific structure of which is as follows: Example

[0042] Figure 1 This is an assembly diagram of the osteotomy guide provided in the first embodiment of the present invention. Figure 2 This is an exploded view of the osteotomy guide provided in the first embodiment of the present invention at one angle.

[0043] like Figure 1 and Figure 2 As shown, the present invention provides an osteotomy guide for knee replacement surgery navigation, comprising:

[0044] Navigation array 1, which is composed of array body 11 and array fixing shell 12. The array body 11 has at least 3 reflective elements, which can be reflective stickers, reflective balls, etc. In this embodiment, reflective stickers are used to mark the position of navigation array 1 in the navigation system. The array fixing shell 12 has a U-shaped structure.

[0045] The saw blade fixing seat 2 has a bone needle hole 21 for fixing bone needles and a saw blade groove 22 for the operation of the saw blade.

[0046] The first direction adjustment structure 3, which consists of a left adjustment structure 31, a right adjustment structure 32, a middle adjustment structure 33 and a positioning plate 34, is used to adjust the movement of the saw blade fixing seat 2 along the first direction, which is the anteroposterior tilt direction relative to the femoral model or the tibia model.

[0047] Bone needle 4, which is used to fix the saw blade fixing seat 2 in the bone needle hole 21.

[0048] Preferably, the navigation array 1 and the saw blade fixing seat 2 are quickly fixed and disassembled by magnetic adsorption, and the first direction adjustment structure 3 and the saw blade fixing seat 2 are quickly fixed and disassembled by spring and glass ball locking.

[0049] As an optional implementation, the first direction adjustment structure 3 and the saw blade fixing seat 2 can also be connected and fixed by integral molding.

[0050] As an optional implementation, the saw blade fixing seat 2 has two bosses 23 on its side, and the array fixing housing 12 has magnet fixing parts 13 at both ends of its U-shaped structure. The magnet fixing parts 13 have boss grooves 14 for cooperating with the bosses 23 of the saw blade fixing seat 2.

[0051] As an optional implementation, the boss 23 of the saw blade holder is made of magnetic 304 stainless steel.

[0052] As an optional implementation, the boss 23 of the saw blade holder can also be made of other magnetic materials, such as 15-5PH.

[0053] like Figure 3 As shown, a magnet 15 is installed inside the magnet fixing member 13.

[0054] like Figure 4 As shown, when the boss groove 14 on the magnet fixing member engages with the boss 23 of the saw blade fixing seat, the magnet 15 inside the magnet fixing member simultaneously generates a magnetic attraction with the boss 23 of the saw blade fixing seat, thereby achieving a tight connection between the navigation array 1 and the saw blade fixing seat 2.

[0055] As an alternative implementation, when it is necessary to disassemble the navigation array 1 and the saw blade mounting base 2, it is only necessary to manually separate the two parts.

[0056] As an optional implementation, the left adjustment structure 31 and the right adjustment structure 32 of the first direction adjustment structure 3 are respectively fixed to both ends of the middle adjustment structure 33 by screws, and the positioning plate 34 is fixed to the lower end of the middle adjustment structure 33.

[0057] As an optional implementation, the left adjustment structure 31, the right adjustment structure 32, and the middle adjustment structure 33 can also be integrally formed.

[0058] As an optional implementation, the saw blade fixing seat 2 is further provided with a positioning plate limiting groove 24. The positioning plate 34 in the first direction adjustment structure 3 is used to cooperate with the positioning plate limiting groove 24 to restrict the relative movement between the first direction adjustment structure 3 and the saw blade fixing seat 2, so that the first direction adjustment structure 3 can only move along the slotting direction of the positioning plate limiting groove 24.

[0059] As an optional implementation, spring beads 35 are respectively provided on the inner sides of the left adjustment structure 31 and the right adjustment structure 32 of the first direction adjustment structure 3. Arc-shaped grooves 25 matching the spring beads 35 are provided on both sides of the saw blade fixing seat 2. When the first adjustment mechanism 3 moves along the slotting direction of the positioning plate limiting groove 24, the spring beads 35 move into the arc-shaped grooves 25 of the saw blade fixing seat 2. Under the action of elastic force, the spring beads 35 on both sides clamp the saw blade fixing seat 2, thereby achieving complete fixation of the first direction adjustment structure 3 and the saw blade fixing seat 2.

[0060] As an optional implementation, the spring glass ball 35 can be fixed to the inside of the left adjustment structure 31 and the right adjustment structure 32 of the first direction adjustment structure 3 by means of riveting, dispensing, etc.

[0061] As an optional implementation, when it is necessary to disassemble the first direction adjustment structure 3 and the saw blade fixing seat 2, it is only necessary to pull the first direction adjustment mechanism 3 upward along the direction of the slot of the positioning plate limiting groove 24, so that the spring glass ball 35 separates from the arc-shaped groove 25 of the saw blade fixing seat 2, and continue to increase the pulling force to achieve the rapid separation of the first direction adjustment structure 3 and the saw blade fixing seat 2.

[0062] As an optional implementation, the saw blade fixing seat 2 is also provided with bone needle holes 21, which are divided into three types: first bone needle hole 211, second bone needle hole 212, and third bone needle hole 213.

[0063] As an optional implementation, the first bone needle hole 211 and the second bone needle hole 212 are axially parallel to the slotting direction of the positioning plate limiting groove 24, and the third bone needle hole 213 has a certain inclination angle, the angle between its axial direction and the axial direction of the first bone needle hole 211 and the second bone needle hole 212 can be 5-25°.

[0064] As an optional implementation, multiple first bone needle holes 211, second bone needle holes 212 and third bone needle holes 213 may be provided.

[0065] Example 2:

[0066] Figure 5 This is an assembly diagram of the osteotomy guide provided in the second embodiment of the present invention. Figure 6 This is an exploded view of the osteotomy guide provided in the second embodiment of the present invention at one angle.

[0067] like Figure 5 and Figure 6 As shown, the present invention provides an osteotomy guide for knee replacement surgery navigation, comprising:

[0068] Navigation array 1, which is composed of array body 11 and array fixing shell 12. The array body 11 has at least 3 reflective elements, which can be reflective stickers, reflective balls, etc. In this embodiment, reflective stickers are used to mark the position of navigation array 1 in the navigation system. The array fixing shell 12 has a U-shaped structure.

[0069] The saw blade fixing seat 2 has a bone needle hole 21 for fixing bone needles and a saw blade groove 22 for the operation of the saw blade.

[0070] The first direction adjustment structure 3, which consists of a left adjustment structure 31, a right adjustment structure 32, a middle adjustment structure 33 and a positioning plate 34, is used to adjust the movement of the saw blade fixing seat 2 along the first direction.

[0071] Bone needle 4, the bone needle 4 is used to fix in the bone needle hole 21 of the saw blade fixing seat 2;

[0072] Screw 5 is used to fix the navigation array 1 to the saw blade mounting base 2.

[0073] Preferably, the navigation array 1 and the saw blade fixing seat 2 are quickly fixed and disassembled by screw locking, and the first direction adjustment structure 3 and the saw blade fixing seat 2 are quickly fixed and disassembled by magnetic adsorption.

[0074] As an optional implementation, the top of the saw blade fixing seat 2 is provided with a cylinder 26, which can cooperate with the U-shaped structure of the array fixing housing 12, and the height of the U-shaped structure of the array fixing housing 12 is greater than the height of the cylinder 26.

[0075] As an optional implementation, the inner wall of the cylinder 26 is provided with threads, which can be engaged with the screw 5.

[0076] As an optional implementation, the diameter of the screw 5 is greater than the distance between the two ends of the U-shaped structure of the array fixing housing 12.

[0077] like Figure 6 As shown, when the U-shaped structure of the array fixing housing 12 is sleeved on the cylinder 26 of the saw blade fixing seat, the screw 5 is locked to the cylinder 26 by threads. Since the height of the U-shaped structure of the array fixing housing 12 is greater than the height of the cylinder 26 and the diameter of the screw 5 is greater than the inner diameter of the U-shaped structure of the array fixing housing 12, the navigation array 1 and the saw blade fixing seat 2 can be tightly connected by thread locking.

[0078] As an alternative implementation, when it is necessary to disassemble the navigation array 1 and the saw blade mounting base 2, it is only necessary to loosen the screw 5 by turning it in the opposite direction.

[0079] As an optional implementation, the left adjustment structure 31 and the right adjustment structure 32 of the first direction adjustment structure 3 are respectively fixed to both ends of the middle adjustment structure 33 by screws, and the positioning plate 34 is fixed to the lower end of the middle adjustment structure 33.

[0080] As an optional implementation, the left adjustment structure 31, the right adjustment structure 32, and the middle adjustment structure 33 can also be integrally formed.

[0081] As an optional implementation, the saw blade fixing seat 2 is further provided with a positioning plate limiting groove 24. The positioning plate 34 in the first direction adjustment structure 3 is used to cooperate with the positioning plate limiting groove 24 to restrict the relative movement between the first direction adjustment structure 3 and the saw blade fixing seat 2, so that the first direction adjustment structure 3 can only move along the slotting direction of the positioning plate limiting groove 24.

[0082] As an optional implementation, the saw blade fixing seat 2 is provided with magnet fixing seats 27 on both sides, and a second magnet 28 is installed on the magnet fixing seat 27.

[0083] As an optional implementation, both the left adjustment structure 31 and the right adjustment structure 32 have grooves 36 at their bottoms for engaging with the second magnet 28 of the magnet holder.

[0084] As an optional implementation, the left adjustment structure 31 and the right adjustment structure 32 are made of magnetic materials. When the first adjustment mechanism moves along the direction of the slot of the positioning plate, the grooves 36 of the left adjustment structure and the right adjustment structure respectively cooperate with the second magnet 28 on the magnet fixing seat, and at the same time generate magnetic attraction, so as to realize the complete fixation of the first direction adjustment structure 3 and the saw blade fixing seat 2.

[0085] As an optional implementation, when it is necessary to disassemble the first direction adjustment structure 3 and the saw blade fixing seat 2, it is only necessary to manually separate the two parts.

[0086] As an optional implementation, the saw blade fixing seat 2 is also provided with bone needle holes 21, which are divided into three types: first bone needle hole 211, second bone needle hole 212, and third bone needle hole 213.

[0087] As an optional implementation, the first bone needle hole 211 and the second bone needle hole 212 are axially parallel to the slotting direction of the positioning plate limiting groove 24, and the third bone needle hole 213 has a certain inclination angle, the angle between its axial direction and the axial direction of the first bone needle hole 211 and the second bone needle hole 212 can be 5-25°.

[0088] As an optional implementation, multiple first bone needle holes 211, second bone needle holes 212 and third bone needle holes 213 may be provided.

[0089] Example 3:

[0090] Figure 7 This is an assembly diagram of the osteotomy guide provided in the third embodiment of the present invention.

[0091] like Figure 7 As shown, the present invention provides an osteotomy guide for knee replacement surgery navigation, comprising:

[0092] Navigation array 1, which is composed of array body 11 and array fixing shell 12. The array body 11 has at least 3 reflective elements, which can be reflective stickers, reflective balls, etc. In this embodiment, reflective stickers are used to mark the position of navigation array 1 in the navigation system. The array fixing shell 12 has a U-shaped structure.

[0093] The saw blade fixing seat 2 has a bone needle hole 21 for fixing bone needles and a saw blade groove 22 for the operation of the saw blade.

[0094] The first direction adjustment structure 3 is composed of a left adjustment structure 31, a right adjustment structure 32, and a middle adjustment structure 33, and is integrally formed.

[0095] Bone needle 4, which is used to fix the saw blade fixing seat 2 in the bone needle hole 21.

[0096] Wherein, the left adjustment structure 31 of the first direction adjustment structure is a connection and fixing area for connecting and fixing with the saw blade fixing seat 2, and the right adjustment structure 32 is a hand-held part for adjusting the movement of the saw blade fixing seat 2.

[0097] Preferably, the navigation array 1 and the first direction adjustment structure 3 are quickly fixed and disassembled by magnetic adsorption, and the first direction adjustment structure 3 and the saw blade fixing seat 2 are quickly fixed and disassembled by screw locking.

[0098] As an optional implementation, the array fixing housing 12 in this embodiment has the same structure as that in Embodiment 1, such as... Figure 3 As shown.

[0099] As an optional implementation, the first direction adjustment structure 3 has two contoured bosses 37 on each of its two sides for engaging with the boss grooves 14 of the magnet fixing member.

[0100] As an optional implementation, the contoured boss 37 of the first direction adjustment structure is made of magnetic 304 stainless steel.

[0101] As an alternative implementation, the boss 37 of the first direction adjustment structure can also be made of other magnetic materials, such as 15-5PH.

[0102] As an optional implementation, when the boss groove 14 on the magnet fixing member engages with the boss 37 of the first direction adjustment structure, the magnet 15 inside the magnet fixing member simultaneously generates a magnetic attraction with the boss 37 of the first direction adjustment structure, thereby achieving a tight connection between the navigation array 1 and the first direction adjustment structure 3.

[0103] As an optional implementation, when it is necessary to disassemble the navigation array 1 and the first direction adjustment structure 3, it is only necessary to manually separate the two components.

[0104] As an optional implementation, the left adjustment structure 31 of the first direction adjustment structure is a connection and fixing area for connecting and fixing with the saw blade fixing seat 2. The saw blade fixing seat 2 and the first direction adjustment structure can be fixed by screw locking.

[0105] As an optional implementation, the saw blade fixing seat 2 and the first direction adjustment structure can also be fixed by welding or gluing.

[0106] As an optional implementation, the saw blade fixing seat 2 is also provided with bone needle holes 21, which are divided into three types: first bone needle hole 211, second bone needle hole 212, and third bone needle hole 213.

[0107] As an optional implementation, the first bone needle hole 211 and the second bone needle hole 212 are axially parallel to the vertical line of the upper end face of the saw blade fixing seat 2, and the third bone needle hole 213 has a certain inclination angle, the angle between its axis and the axis of the first bone needle hole 211 and the second bone needle hole 212 can be 5-25°.

[0108] As an optional implementation, multiple first bone needle holes 211, second bone needle holes 212 and third bone needle holes 213 may be provided.

[0109] Secondly, the present invention also provides a method for using an osteotomy guide in knee replacement surgery navigation, comprising the following steps:

[0110] Step 1: According to the osteotomy guide in the knee replacement surgery navigation described above, fix the navigation array, the saw blade fixing seat, and the first direction adjustment structure, and install the saw blade in the saw blade groove of the saw blade fixing seat;

[0111] Step 2: Rotate the first direction adjustment structure along the first direction. The navigation system provides real-time feedback on the position of the saw blade groove. When the first direction angle is rotated to the target position, stop rotating and insert the first bone needle along the first bone needle hole for fixation. At this time, the angle of the osteotomy guide in the first direction is fixed accordingly.

[0112] Step 3: Rotate the osteotomy guide along the second direction, which is the circumferential position of the first bone needle. The navigation system provides real-time feedback on the position of the saw blade groove. When the second direction angle is rotated to the target position, stop rotating and insert the second bone needle along the second bone needle hole for fixation. At this time, the angle of the osteotomy guide in the second direction is fixed accordingly.

[0113] Step 4: As the first and second bone pins are fixed in the first and second bone pin holes respectively, the osteotomy guide can only move up and down along the axial direction. When the bottom surface of the osteotomy guide is in contact with the femoral or tibial model, that is, when the osteotomy guide can no longer move downward along the axial direction, the third bone pin is inserted along the third bone pin hole. At this time, the axial movement direction of the osteotomy guide is fixed, thereby achieving complete fixation of the osteotomy guide and the femoral or tibial model.

[0114] Step 5: Perform osteotomy on the femoral or tibial model. During this process, the position of the reflector on the navigation array can be marked by the navigation system. Through physical space conversion, the position of the saw blade fixed seat can be marked, thereby achieving precise positioning of the osteotomy angle and position.

[0115] This invention provides an osteotomy guide for knee replacement surgery navigation and its usage method, which has the following technical advantages compared with the prior art:

[0116] 1. The first direction adjustment structure and the saw blade fixing seat, as well as the navigation array and the saw blade fixing seat, are simple to cooperate with, securely fixed and easy to disassemble, which is convenient for doctors to operate. In addition, by adjusting the position of the first direction adjustment structure and the saw blade fixing seat, the position and angle of osteotomy can be adjusted.

[0117] 2. By calibrating the position of the saw blade in a timely manner through the navigation system, the angle and position of the osteotomy can be accurately located. Compared with the method of doctors using traditional surgical tools to perform osteotomy, the osteotomy guide described in this invention has high positional accuracy during osteotomy and relies less on the doctor's experience. Compared with the method of osteotomy using fully intelligent navigation technology and robotic arms, this invention does not require the participation of robotic arms, the operation steps are simple, and the surgical cost is reduced.

[0118] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An osteotomy guide for knee replacement surgery navigation, characterized in that, include: A navigation array, comprising an array body and an array fixing shell, wherein the array body has at least three reflectors for marking the position of the navigation array in the navigation system, and the array fixing shell has a U-shaped structure; A saw blade holder, wherein the saw blade holder has a bone needle hole for fixing bone needles and a saw blade groove for saw blade operation; The first direction adjustment structure, which consists of a left adjustment structure, a right adjustment structure, a middle adjustment structure and a positioning plate, is used to adjust the movement of the saw blade fixing seat along the first direction, which is the anteroposterior tilt direction relative to the femoral model or the tibia model. Bone pin, the bone pin being used to fix the saw blade fixing seat in the bone pin hole; The navigation array is connected and fixed to the saw blade mounting base and can be quickly disassembled; the first direction adjustment structure is connected and fixed to the saw blade mounting base and can be quickly disassembled. The saw blade fixing seat is also provided with a positioning plate limiting groove. The positioning plate in the first direction adjustment structure is used to cooperate with the positioning plate limiting groove, which can limit the relative movement between the first direction adjustment structure and the saw blade fixing seat, so that the first direction adjustment structure can only move along the direction of the slot of the positioning plate limiting groove.

2. The osteotomy guide in knee replacement surgery navigation according to claim 1, characterized in that, The saw blade holder has two protrusions on its side, and the array fixing shell U-shaped structure has magnet fixing parts at both ends. The magnet fixing parts have protrusion grooves for cooperating with the protrusions of the saw blade holder.

3. The osteotomy guide in knee replacement surgery navigation according to claim 2, characterized in that, The boss of the saw blade holder is made of a magnetic material, and a magnet is installed inside the magnet fixing component. When the boss groove on the magnet fixing component mates with the boss of the saw blade holder, the magnet inside the magnet fixing component simultaneously generates a magnetic attraction with the boss of the saw blade holder, thereby achieving a tight connection between the navigation array and the saw blade holder.

4. The osteotomy guide in knee replacement surgery navigation according to claim 1, characterized in that, The left and right adjustment structures of the first direction adjustment structure are respectively fixed at both ends of the middle adjustment structure, and the positioning plate is fixed at the lower end of the middle adjustment structure.

5. The osteotomy guide in knee replacement surgery navigation according to claim 1, characterized in that, The left and right adjustment structures of the first directional adjustment structure are respectively provided with spring beads on their inner sides. The saw blade fixing seat is provided with arc-shaped grooves on both sides that match the spring beads. When the first directional adjustment structure moves along the direction of the positioning plate limiting groove, the spring beads move into the arc-shaped groove of the saw blade fixing seat. Under the action of elastic force, the spring beads on both sides clamp the saw blade fixing seat, thereby achieving complete fixation between the first directional adjustment structure and the saw blade fixing seat.

6. The osteotomy guide in knee replacement surgery navigation according to claim 1, characterized in that, The saw blade holder is also provided with bone needle holes, which are divided into three types: first bone needle hole, second bone needle hole and third bone needle hole, and at least one of each of the first bone needle hole, second bone needle hole and third bone needle hole is provided.

7. The osteotomy guide in knee replacement surgery navigation according to claim 6, characterized in that, The first and second bone needle holes are axially parallel to the slotting direction of the positioning plate limiting groove, and the third bone needle hole has a certain inclination angle, the angle between its axis and the axes of the first and second bone needle holes being 5-25°.

8. A method of using an osteotomy guide in knee replacement surgery navigation, based on the osteotomy guide according to any one of claims 6-7, characterized in that, Includes the following steps: Step 1: According to the osteotomy guide in the knee replacement surgery navigation, fix the navigation array, the saw blade fixing seat, and the first direction adjustment structure, and install the saw blade in the saw blade groove of the saw blade fixing seat; Step 2: Rotate the first direction adjustment structure along the first direction. The navigation system provides real-time feedback on the position of the saw blade groove. When the first direction angle is rotated to the target position, stop rotating and insert the first bone needle along the first bone needle hole for fixation. At this time, the angle of the osteotomy guide in the first direction is fixed accordingly. Step 3: Rotate the osteotomy guide along the second direction, which is the circumferential position of the first bone needle. The navigation system provides real-time feedback on the position of the saw blade groove. When the second direction angle is rotated to the target position, stop rotating and insert the second bone needle along the second bone needle hole for fixation. At this time, the angle of the osteotomy guide in the second direction is fixed accordingly. Step 4: As the first and second bone pins are fixed in the first and second bone pin holes respectively, the osteotomy guide can only move up and down along the axial direction. When the bottom surface of the osteotomy guide is in contact with the femoral or tibial model, that is, when the osteotomy guide can no longer move downward along the axial direction, the third bone pin is inserted along the third bone pin hole. At this time, the axial movement direction of the osteotomy guide is fixed, thereby achieving complete fixation of the osteotomy guide and the femoral or tibial model. Step 5: Perform osteotomy on the femoral or tibial model. During this process, the position of the reflector on the navigation array can be marked by the navigation system. Through physical space conversion, the position of the saw blade fixed seat can be marked, thereby achieving precise positioning of the osteotomy angle and position.

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