Knee joint flexion malformation femur far-end cutting and guiding osteotomy plate

Abstract

The invention belongs to the technical field of medical instruments, and discloses a knee joint flexion malformation thighbone far-end cutting guiding osteotomy plate which comprises a first osteotomy device and a second osteotomy device which are connected. A first positioning hole is formed in the first osteotomy device, and a distal femur osteotomy hole is formed in the first osteotomy device; a fixing plate is arranged on the second osteotomy device, an adjusting device is arranged on the fixing plate, a first guide device and a second guide device are symmetrically arranged on the adjusting device, and the first guide device and the second guide device jointly complete osteotomy positioning of the distal femur. The first osteotomy device is used for osteotomy of the distal femur, the second osteotomy device is used for osteotomy of the posterior condyle osteotomy direction, the retroflex osteotomy direction, the front femur osteotomy direction and the anterior-flex osteotomy direction, individual requirements of patients can be met, and meanwhile the problem that a traditional osteotomy surgical instrument is single and cannot be adjusted is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a femoral distal additional osteotomy guiding osteotomy plate for knee flexion deformity. Background Art

[0002] The knee joint is one of the most complex joints in the human body and an important weight-bearing joint in the lower extremities of the human body. Due to reasons such as accidental injuries, bad exercise habits, diseases, etc., many patients' knee joints have varying degrees of damage, making life extremely inconvenient.

[0003] For end-stage knee joint diseases, such as osteoarthritis, rheumatoid arthritis, traumatic arthritis, knee joint osteonecrosis, etc., total knee arthroplasty has become an effective treatment method, which can effectively relieve pain, restore joint function, and significantly improve the quality of life of patients.

[0004] In knee joint replacement surgery, especially in total knee arthroplasty, multiple osteotomies need to be performed on the distal femur to make the shape of the osteotomy surface match the shape of the prosthesis to be implanted. Traditional methods usually require the use of multiple osteotomy plates to perform multiple resections on the anterior condyle, posterior condyle, and anterior and posterior inclined planes of the femur respectively. It is extremely inconvenient to use, and switching osteotomy plates multiple times also increases the osteotomy error and reduces the accuracy of osteotomy positioning. At the same time, in traditional surgeries, the accuracy of osteotomy and the position of prosthesis implantation mainly depend on the experience accumulation of operators. It is difficult for inexperienced physicians to perform precise surgical operations. And currently, the most important problem is that the standards of intramedullary or extramedullary positioning instruments in conventional surgeries are single, resulting in the difficulty of meeting the individual needs of patients.

[0005] Therefore, the present invention aims to provide a femoral distal additional osteotomy guiding osteotomy plate for knee flexion deformity to solve the above problems.

[0006] Through the above analysis, the problems and defects existing in the prior art are as follows:

[0007] Traditional methods usually require the use of multiple osteotomy plates to perform multiple resections on the anterior condyle, posterior condyle, and anterior and posterior inclined planes of the femur respectively. It is extremely inconvenient to use, and switching osteotomy plates multiple times also increases the osteotomy error and reduces the accuracy of osteotomy positioning. At the same time, in traditional surgeries, the accuracy of osteotomy and the position of prosthesis implantation mainly depend on the experience accumulation of operators. It is difficult for inexperienced physicians to perform precise surgical operations. And currently, the most important problem is that the standards of intramedullary or extramedullary positioning instruments in conventional surgeries are single, resulting in the difficulty of meeting the individual needs of patients. Summary of the Invention

[0008] In view of the problems existing in the prior art, the present invention provides a femoral distal additional osteotomy guiding osteotomy plate for knee flexion deformity.

[0009] The present invention is implemented as follows. A femoral distal plus osteotomy guiding osteotomy plate for knee flexion deformity includes:

[0010] A first osteotomy device and a second osteotomy device, which are connected; a first positioning hole is provided on the first osteotomy device, and a femoral distal osteotomy hole is provided on the first osteotomy device; a fixing plate is provided on the second osteotomy device, a second positioning hole is provided on the fixing plate, an adjusting device is provided on the fixing plate, a guiding device one and a guiding device two are symmetrically provided on the adjusting device, and the guiding device one and the guiding device two jointly complete the osteotomy positioning of the front end of the femur.

[0011] Further, the guiding device one includes a front end osteotomy hole, a front oblique osteotomy hole, and a connecting rod one; the front end osteotomy hole is located on the side far from the fixing plate, the front oblique osteotomy hole is located on the side close to the fixing plate, and the connecting rod one is located above the front oblique osteotomy hole for connecting the entire guiding device one;

[0012] The guiding device two includes a posterior oblique osteotomy hole, a posterior condyle osteotomy hole, and a connecting rod two; the posterior condyle osteotomy hole is located on the side far from the fixing plate, the posterior oblique osteotomy hole is located on the side close to the fixing plate, and the connecting rod two is located above the posterior oblique osteotomy hole for connecting the entire guiding device two.

[0013] Further, a guiding through hole one is provided on the guiding device one, and the guiding through hole one is located between the front oblique osteotomy hole and the front end osteotomy hole; a guiding through hole two is provided on the guiding device two, and the guiding through hole two is located between the posterior oblique osteotomy hole and the posterior condyle osteotomy hole.

[0014] Further, the adjusting device includes an adjusting knob, a transmission rod, a bevel gear one, a bevel gear two, a bevel gear three, an adjusting rod one, and an adjusting rod two; both ends of the transmission rod are fixedly connected to the adjusting knob and the bevel gear three respectively, one end of the adjusting rod one is fixedly connected to the bevel gear one, and the other end is movably connected to the guiding device one, one end of the adjusting rod two is fixedly connected to the bevel gear two, and the other end is movably connected to the guiding device two, and the bevel gear three meshes with the bevel gear one and the bevel gear two at the same time.

[0015] Further, a plug pin is provided at the end of the guiding device one far from the fixing plate, a pin hole matching the plug pin is provided at the end of the first osteotomy device close to the femoral distal osteotomy hole, and the first osteotomy device and the second osteotomy device are connected through the plug pin and the pin hole.

[0016] Combined with the above technical solutions and the solved technical problems, the advantages and positive effects of the technical solution to be protected by the present invention are:

[0017] By connecting and designing the first osteotomy device and the second osteotomy device, the present invention combines various osteotomy requirements into one osteotomy device, avoiding the errors caused by multiple switching of osteotomy plates in the traditional method and improving the stability during the osteotomy operation.

[0018] The present invention is respectively provided with precise positioning holes and osteotomy holes in the first osteotomy device and the second osteotomy device, which can accurately guide the surgical tool for osteotomy, ensure a higher matching degree between the osteotomy surface and the prosthesis, and effectively reduce the surgical risks such as damage to the anterior femoral notch.

[0019] The present invention further includes an adjustment device provided on the fixing plate. The adjustment device can conveniently adjust the positions of the first guiding device and the second guiding device, better adapt to the femoral sizes of different patients, and can be customized according to the individual needs of different patients to make it more suitable for the actual situation of the patients and improve the surgical effect.

[0020] The knee joint flexion deformity femoral distal osteotomy guiding device provided by the present invention, through the modular split structure design of the first osteotomy device and the second osteotomy device, effectively solves the problems of complex structure, poor stability and poor adaptability of the guiding device in the prior art. Through the cooperation of the femoral distal osteotomy hole provided in the first osteotomy device and the front osteotomy hole, the anterior oblique osteotomy hole, the posterior oblique osteotomy hole and the posterior condyle osteotomy hole provided in the second osteotomy device, multi-angle and multi-section precise osteotomy operations on the femoral distal and intercondylar regions are realized, significantly improving the osteotomy accuracy and matching degree.

[0021] Through the design of the guiding through holes on the first guiding device and the second guiding device, the present invention enables real-time observation of the bone mass state in the osteotomy area during the operation, avoiding the risks of mis-cutting or over-osteotomy caused by the lack of visual monitoring during the osteotomy process in the prior art. At the same time, the design of the guiding through holes can significantly reduce the overall weight of the guide plate, reduce the tissue burden during the surgical operation of the patient, improve the operation convenience and structural stability of the device, and effectively ensure the safety and accuracy during the operation.

[0022] The present invention introduces a bevel gear linkage adjustment system. Through the combined action of the transmission rod, the adjustment knob, the bevel gear set and the adjustment rod, the relative positions and angles of the first guiding device and the second guiding device are precisely controlled. Compared with the single-direction adjustment mechanism in the prior art, the present invention can realize flexible adjustment of multi-dimensional osteotomy guidance, so as to adapt to the anatomical structure differences of different patient individuals. This structural design significantly enhances the adaptability and application universality of the device, and improves the accuracy and personalized customization ability of femoral osteotomy.

[0023] Through the detachable connection structure of the bolt and the bolt hole, the present invention improves the stability and controllability of the connection between the first osteotomy device and the second osteotomy device during the osteotomy process. Different from the prior art that relies on simple screw fixation, the bolt connection structure of the present invention not only improves the connection strength, but also facilitates the rapid assembly and disassembly of intraoperative components, significantly optimizing the surgical operation process and efficiency. The overall design not only enhances the practicability of the device in complex surgical environments, but also improves the durability and reusability of the guiding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a front structural schematic diagram of the second osteotomy device provided by an embodiment of the present invention;

[0025] Figure 2 is a side structural schematic diagram of the second osteotomy device provided by an embodiment of the present invention;

[0026] Figure 3 is a structural schematic diagram of the first osteotomy device provided by an embodiment of the present invention;

[0027] Figure 4 is a structural schematic diagram of the adjusting device provided by an embodiment of the present invention.

[0028] In the figure: 1, the first osteotomy device; 11, the first positioning hole; 12, the femoral distal osteotomy hole; 2, the second osteotomy device; 21, the first guiding device; 211, the front-end osteotomy hole; 212, the front oblique osteotomy hole; 213, the first connecting rod; 214, the first guiding through hole; 22, the second guiding device; 221, the rear oblique osteotomy hole; 222, the posterior condyle osteotomy hole; 223, the second connecting rod; 224, the second guiding through hole; 23, the fixing plate; 231, the second positioning hole; 3, the adjusting device; 31, the adjusting knob; 32, the transmission rod; 33, the third bevel gear; 34, the first adjusting rod; 35, the first bevel gear; 36, the second adjusting rod; 37, the second bevel gear; 4, the bolt; 5, the bolt hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] Before surgery, the degree of knee flexion deformity and the osteotomy parameters of the distal femur are determined by X-ray or CT three-dimensional reconstruction technology to determine the osteotomy direction, osteotomy angle, and osteotomy thickness. When performing osteotomy, first fix the first positioning hole of the first osteotomy device to the distal femur with a Kirschner wire or an orthopedic positioning screw, and use a band saw or a reciprocating saw to precisely perform distal osteotomy through the osteotomy hole in the distal femur. At this time, the second osteotomy device is firmly connected to the first osteotomy device through a pin connection structure, and provides a rigid limit support for the osteotomy position of the distal femur to prevent osteotomy deviation and ensure the accuracy of the osteotomy plane.

[0031] After completing the distal osteotomy, remove the first osteotomy device by releasing the pin connection structure, and activate the bevel gear linkage adjustment system integrated on the second osteotomy device, that is, rotate the adjustment knob, and drive the bevel gear set (bevel gear one, two, three) through the transmission rod to achieve power transmission, and then adjust the relative positions of the first guiding device and the second guiding device to make the osteotomy channel accurately match the individual anatomical morphological differences of the patient's femur, effectively meeting the personalized needs of the osteotomy angle and position of the femoral condyle of different patients.

[0032] After the second osteotomy device is precisely adjusted and fixed to the distal femur, it is firmly fixed with an orthopedic fixation screw or a guide pin through the second positioning hole on the fixing plate. Using a band saw or a reciprocating saw, first perform anterior osteotomy of the femoral condyle through the front osteotomy hole to establish a standardized osteotomy surface for the front end of the prosthesis to fit precisely; then perform anterior oblique osteotomy through the anterior oblique osteotomy hole to establish an anterior condyle inclined osteotomy plane of the prosthesis, and accurately restore the anatomical matching of the intercondylar groove of the knee joint and the anterior inclined plane of the prosthesis.

[0033] Subsequently, further perform posterior oblique osteotomy and posterior condyle osteotomy along the osteotomy guide hole of the second guiding device. Use the posterior oblique osteotomy hole to perform osteotomy of the posterior inclined plane of the femur to precisely match the posterior condyle slope of the prosthesis, and at the same time perform posterior condyle plane osteotomy through the posterior condyle osteotomy hole to improve the anatomical configuration of the intercondylar fossa and the posterior condyle of the femur. This link is crucial. Precise posterior oblique and posterior condyle osteotomies jointly ensure the biomechanical function of the femoral prosthesis and the symmetrical balance of the force line between the tibiofemoral joints.

[0034] During the osteotomy operation, through the guiding through holes (guiding through hole one, guiding through hole two) on the first guiding device and the second guiding device, the bone quality state of the femoral osteotomy surface is monitored in real time, and the osteotomy process and depth of the cortical bone and cancellous bone are judged in time to ensure a high degree of consistency between the intraoperative osteotomy thickness and the anatomical parameters, avoid mis-cutting or over-osteotomy, and effectively reduce the weight of the guide plate, reduce the tissue burden of the patient during the operation and the operation time, and further improve the stable fixation effect of the guide plate during the operation.

[0035] After the distal femur and the anterior-posterior oblique osteotomies are completed, the fixation screws and the osteotomy guide device are removed. After thoroughly flushing the osteotomy interface during the operation, the bone cement interface technique (bone polymethyl methacrylate, PMMA) is applied to firmly implant and fix the knee joint prosthesis that precisely matches the osteotomy surface formed during the operation. This prosthesis fixation method can effectively enhance the biological stability between the implant and the femoral osteotomy interface, optimize the load-bearing stress distribution, and ultimately restore the normal biomechanical function of the patient's knee joint, achieving the long-term clinical success rate and functional reconstruction goals of the osteotomy.

[0036] As Figures 1-4 described, Example: The femoral distal plus osteotomy guiding osteotomy plate for knee flexion deformity includes a first osteotomy device 1 and a second osteotomy device 2. The first osteotomy device 1 and the second osteotomy device 2 are connected through a pin 4 and a socket. A first positioning hole 11 is provided on the first osteotomy device 1, and a femoral distal osteotomy hole 12 is provided on the first osteotomy device 1 for performing osteotomy operations on the femoral distal direction. A fixing plate 23 is provided on the second osteotomy device 2. A second positioning hole 231 is provided on the fixing plate 23. An adjusting device 3 is provided on the fixing plate 23. A guiding device one 21 and a guiding device two 22 are symmetrically connected to the adjusting device 3. The adjusting device 3 can adjust the positions of the guiding device one 21 and the guiding device two 22 to meet the personalized needs of patients.

[0037] The guiding device one 21 in this embodiment includes a front-end osteotomy hole 211, an anterior oblique osteotomy hole 212, and a connecting rod one 213. The front-end osteotomy hole 211 is located on the side away from the fixing plate 23, and the anterior oblique osteotomy hole 212 is located on the side close to the fixing plate 23. The front-end osteotomy hole 211 can perform osteotomy on the femoral front end, and the anterior oblique osteotomy hole 212 is used for performing osteotomy on the anterior oblique direction of the femur. The connecting rod one 213 is located above the anterior oblique osteotomy hole 212 for connecting the entire guiding device one 21.

[0038] The guiding device two 22 includes a posterior oblique osteotomy hole 221, a posterior condyle osteotomy hole 222, and a connecting rod two 223. The posterior condyle osteotomy hole 222 is located on the side away from the fixing plate 23, and the posterior oblique osteotomy hole 221 is located on the side close to the fixing plate 23. The posterior oblique osteotomy hole 221 can perform osteotomy on the posterior oblique direction of the femur, and the posterior condyle osteotomy hole 222 is used for performing osteotomy on the posterior condyle direction. The connecting rod two 223 is located above the posterior oblique osteotomy hole 221 for connecting the entire guiding device two 22. Finally, the overall osteotomy positioning of the femoral front end is completed through the joint cooperation of the guiding device one 21 and the guiding device two 22.

[0039] Preferably, in this embodiment, a first guiding device 21 is provided with a first guiding through-hole 214, and the first guiding through-hole 214 is located between the front inclined osteotomy hole 212 and the front end osteotomy hole 211; a second guiding device 22 is provided with a second guiding through-hole 224, and the second guiding through-hole 224 is located between the rear inclined osteotomy hole 221 and the rear condyle osteotomy hole 222. The first guiding through-hole 214 and the second guiding through-hole 224 can facilitate observing the bone mass during the osteotomy process, so as to improve the accuracy of the operation. At the same time, the first guiding through-hole 214 and the second guiding through-hole 224 can reduce the weight of the overall device, reduce the burden on the patient during the operation, and can be better fixed at the operation position of the patient, improving the stability of the overall device.

[0040] The adjusting device 3 in this embodiment includes an adjusting knob 31, a transmission rod 32, a first bevel gear 35, a second bevel gear 37, a third bevel gear 33, a first adjusting rod 34 and a second adjusting rod 36; both ends of the transmission rod 32 are fixedly connected to the adjusting knob 31 and the third bevel gear 33 respectively. One end of the first adjusting rod 34 is fixedly connected to the first bevel gear 35, and the other end is movably connected to the first guiding device 21. One end of the second adjusting rod 36 is fixedly connected to the second bevel gear 37, and the other end is movably connected to the second guiding device 22. The third bevel gear 33 meshes with the first bevel gear 35 and the second bevel gear 37 at the same time, so that rotating the adjusting knob 31 can adjust the positions of the first guiding device 21 and the second guiding device 22, which can better adapt to the femoral sizes of different patients, and at the same time can be customized according to the personalized needs of different patients.

[0041] A pin 4 is provided at one end of the first guiding device 21 away from the fixing plate 23 in this embodiment. A pin hole 5 matching the pin 4 is provided at one end of the first osteotomy device 1 close to the femoral distal osteotomy hole 12. The first osteotomy device 1 and the second osteotomy device 2 are connected through the pin 4 and the pin hole. The cooperation of the pin 4 and the pin hole makes the overall device have better stability. At the same time, during osteotomy, since the first osteotomy device 1 and the second osteotomy device mutually abut against the femur, the stability during the osteotomy process can also be ensured, thereby improving the accuracy of the osteotomy operation.

[0042] Working principle: During use, after osteotomy measurement of the femur, the first osteotomy device 1 is fixed above the femur by passing a positioning screw through the first positioning hole 11. A conventional oscillating saw or reciprocating saw is used to perform osteotomy through the distal femoral osteotomy hole 12. At this time, the second osteotomy device 2 abuts against the distal femoral osteotomy direction to maintain stability during the osteotomy process. When the osteotomy in the distal femoral osteotomy direction is completed, the fixing screw at the first positioning hole 11 is removed, and the positions of the first guiding device 21 and the second guiding device 22 are adjusted through the adjusting device 3 to be applicable to the femoral sizes of different patients. Then, the second osteotomy device 2 is firmly fixed at the front end of the femur by passing a fixing screw through the second positioning hole 231. A conventional oscillating saw or reciprocating saw is used to perform osteotomy on the front osteotomy direction through the front osteotomy hole 211, osteotomy on the anterior oblique osteotomy direction through the anterior oblique osteotomy hole 212, osteotomy on the posterior oblique osteotomy direction through the posterior oblique osteotomy hole 221, and osteotomy on the posterior condyle osteotomy direction through the posterior condyle osteotomy hole 222. After the osteotomy is completed, the fixing screws and the osteotomy plate are removed, and an implant prosthesis matching the shape of the osteotomy surface is fixed on the osteotomy surface using bone cement to complete the knee replacement surgery.

[0043] Specific implementation of the present invention:

[0044] First: Preliminary fixation and measurement of the device

[0045] Before the operation starts, the surgeon first uses imaging methods to measure the distal femur of the patient to determine the precise position and angle of osteotomy. Subsequently, the first osteotomy device 11 is fixed to the distal femur by passing a positioning screw through the first positioning hole 11 to ensure that the device remains stable during the operation. The distal femoral osteotomy hole 12 is designed to provide an accurate osteotomy reference position, enabling the surgeon to perform standardized osteotomy operations using an oscillating saw or reciprocating saw to ensure the symmetry and angle of the distal femoral osteotomy meet the surgical requirements.

[0046] Second: Osteotomy operation of the first osteotomy device

[0047] After the first osteotomy device 11 is fixed to the distal femur, the surgeon uses an oscillating saw or reciprocating saw to perform osteotomy along the distal femoral osteotomy hole 1212. At this time, the second osteotomy device 22 is tightly connected to the first osteotomy device 11 through the pin 44 and the jack and supports each other during the osteotomy process, enabling the device to remain stable during the operation, thereby preventing deviation during the cutting process. After the osteotomy is completed, the surgeon removes the fixing screw at the first positioning hole 1111 to adjust the second osteotomy device 22 for the next step of the operation.

[0048] Third: Personalized adjustment and adaptation

[0049] According to the femoral dimensions of different patients, the doctor uses the adjustment device 33 for personalized adjustment to ensure that the osteotomy direction and angle conform to the physiological and anatomical structure of the patient. The adjustment device 33 is driven by the adjustment knob 31, and through the transmission rod 32, the bevel gear three 33, bevel gear one 35, and bevel gear two 37 are engaged for linkage, so that the adjustment rod 34 and the adjustment rod 36 adjust the relative positions of the guiding device one 21 and the guiding device two 22. After the adjustment is completed, the doctor passes the fixing screw through the second positioning hole 231 to firmly fix the second osteotomy device 22 at the front end of the femur to ensure the stability during the osteotomy process.

[0050] Fourth: Precise osteotomy of the guiding device

[0051] After the second osteotomy device 22 is fixed, the doctor sequentially uses a reciprocating saw or a band saw to pass through each guiding osteotomy hole for precise osteotomy. Specifically, the reciprocating saw passes through the front osteotomy hole 211 to osteotomize the front end of the femur, passes through the anterior oblique osteotomy hole 212 to osteotomize the anterior oblique direction of the femur, passes through the posterior oblique osteotomy hole 221 to osteotomize the posterior oblique direction of the femur, and passes through the posterior condyle osteotomy hole 222 to osteotomize the posterior condyle direction of the femur. The guiding through holes one 214 and two 224 provide additional vision, enabling the doctor to monitor the bone quality during the osteotomy process, ensuring the precision of the osteotomy, and at the same time optimizing the convenience of the surgical operation.

[0052] Fifth: Removal of the osteotomy plate and prosthesis implantation

[0053] After all necessary osteotomy operations are completed, the doctor first removes all the fixing screws and carefully removes the first osteotomy device 11 and the second osteotomy device 22. Since the entire osteotomy process adopts a multi-point positioning and guiding design, the finally formed osteotomy surface can closely fit the prosthesis, thus providing a stable prosthesis support foundation. The doctor then selects a prosthesis that matches the shape of the osteotomy surface and uses bone cement for fixation to ensure the long-term stability and tolerance of the prosthesis, improving the success rate of the surgery and the postoperative rehabilitation effect.

[0054] Sixth: Stability and optimization of the device

[0055] This device adopts a connection method of a pin 44 and a pin hole 55 to provide additional mechanical support during the osteotomy process and improve the overall stability. In addition, the guiding device one 21 and the guiding device two 22 are precisely adjusted through the adjustment device 33 to adapt to the personalized needs of different patients and maintain high precision during the osteotomy process. The design of the guiding through holes one 214 and two 224 not only reduces the weight of the device but also enhances the surgical visualization ability, enabling the doctor to check the bone quality at any time and ensuring the osteotomy quality. The design of the present invention provides a more efficient, safe, and stable solution for correcting knee flexion deformity, providing important support for clinical orthopedic surgery.

[0056] The following are four specific embodiments of the femoral distal plus osteotomy guide osteotomy plate for knee flexion deformity:

[0057] Embodiment 1: Standardized knee flexion deformity correction surgery

[0058] Background:

[0059] A 65-year-old male patient had flexion deformity due to long-term knee osteoarthritis and could not walk normally. Imaging examinations showed severe deformation of the femoral distal end, and osteotomy correction was required to restore the normal biomechanical structure of the knee joint.

[0060] Implementation process:

[0061] 1. Preliminary fixation: After determining the osteotomy angle of the femoral distal end using image navigation, the first osteotomy device 11 is fixed to the femoral distal end with positioning screws through the first positioning holes 11.

[0062] 2. Distal osteotomy: A reciprocating saw is used to perform standardized osteotomy along the osteotomy holes 12 of the femoral distal end while maintaining the stable support of the second osteotomy device 22 to the femur.

[0063] 3. Personalized adjustment: The adjusting device 33 is used to rotate the adjusting knob 31 to adjust the guiding device one 21 and the guiding device two 22 to adapt to the patient's bone size.

[0064] 4. Front and rear end osteotomy: A reciprocating saw or a band saw is successively used to precisely perform osteotomy through the front end osteotomy hole 211, the front oblique osteotomy hole 212, the rear oblique osteotomy hole 221 and the posterior condyle osteotomy hole 222.

[0065] 5. Prosthesis implantation: The fixing screws and the osteotomy plate are removed, and a knee joint prosthesis conforming to the shape of the osteotomy surface is installed. After fixation, the operation is completed.

[0066] Advantages:

[0067] Provide precise multi-angle osteotomy to ensure the biomechanical alignment of the knee joint.

[0068] Adopt a double-layer positioning structure to improve the osteotomy stability and reduce intraoperative errors.

[0069] Embodiment 2: Osteotomy correction for complex knee contracture cases

[0070] Background:

[0071] A 50-year-old female had long-term knee contracture due to rheumatoid arthritis, with a flexion deformity of more than 40°. It was difficult to restore her normal gait with traditional correction methods.

[0072] Implementation process:

[0073] 1. Preoperative planning: With the assistance of CT and 3D modeling software, determine the osteotomy range of the distal femur and simulate the postoperative angle recovery.

[0074] 2. Intraoperative adjustment: After fixing the distal femur with the first osteotomy device 11, adjust the second osteotomy device 22 to match the patient's anatomical characteristics.

[0075] 3. Guided precise osteotomy: Rotate the adjustment knob 31 to adjust the first guiding device 21 and the second guiding device 22 through the gear set, and complete the distal, anterior, and posterior condyle osteotomies at different osteotomy hole positions.

[0076] 4. Postoperative recovery: Remove the fixation device and implant a customized prosthesis to adapt to the physiological curve of the knee joint after surgery.

[0077] Advantages:

[0078] Combined with image navigation and personalized adjustment mechanism, achieve precise correction of difficult cases.

[0079] Adopt the guiding hole design to make the osteotomy more uniform and reduce the risk of postoperative complications.

[0080] Example 3: Repair of post-traumatic knee joint deformity

[0081] Background:

[0082] A 40-year-old male had poor healing of a distal femoral fracture in a traffic accident, resulting in knee flexion deformity and affecting gait, and osteotomy correction and joint prosthesis implantation were required.

[0083] Implementation process:

[0084] 1. Preoperative evaluation: Take a CT before surgery, evaluate the degree of deformity, and formulate a correction plan.

[0085] 2. Fixation device: Fix the first osteotomy device 11 to the distal femur and connect the second osteotomy device 22 through the pin hole 55 to provide stable support.

[0086] 3. Intraoperative osteotomy:

[0087] First, perform a standard osteotomy along the distal femoral osteotomy hole 12;

[0088] Adjust the first guiding device 21 and the second guiding device 22 in sequence, and perform multi-angle osteotomies through the anterior osteotomy hole 211 and the posterior oblique osteotomy hole 221 to reshape the femur.

[0089] 4. Prosthesis replacement: Remove the fixation device, install the prosthesis, and fix it with bone cement.

[0090] Advantages:

[0091] Repair the problem of asymmetric healing of post-traumatic fractures through multi-angle osteotomy.

[0092] Provide osteotomy support with a fixation device to reduce the risk of intraoperative fractures.

[0093] Example 4: Correction of congenital knee joint dysplasia

[0094] Background:

[0095] A 30-year-old male patient had knee flexion deformity due to congenital femoral dysplasia, with limited long-term walking ability, and needed distal osteotomy correction.

[0096] Implementation process:

[0097] 1. Preoperative imaging analysis: CT scan showed that the distal femur of the patient was abnormally short and the joint alignment was abnormal.

[0098] 2. Intraoperative positioning: After fixing the distal femur with the first osteotomy device 11, adjust the adjustment device 33 to adapt to different osteotomy positions to meet the personalized correction needs.

[0099] 3. Multi-level osteotomy:

[0100] First, perform a preliminary osteotomy using the distal osteotomy hole 12;

[0101] Sequentially use the anterior oblique osteotomy hole 212 and the posterior oblique osteotomy hole 221 for additional correction to optimize joint alignment.

[0102] 4. Orthopedic implantation: After the operation, implant a customized prosthesis to restore the normal range of motion of the knee joint.

[0103] Advantages:

[0104] Suitable for patients with congenital abnormalities, providing a highly personalized correction plan.

[0105] Optimize the osteotomy angle through the adjustment device to improve the postoperative knee joint stability.

[0106] The above four examples cover a variety of application scenarios such as standard osteotomy correction, complex joint deformity repair, post-traumatic deformity repair, and congenital abnormality correction.

[0107] The femoral distal plus osteotomy guiding osteotomy plate for knee flexion deformity of the present invention has:

[0108] 1. High stability: Adopt a double-layer fixation structure to reduce intraoperative errors.

[0109] 2. Personalized adjustment: The guiding device can be adjusted according to the patient's needs to adapt to different femoral sizes.

[0110] 3. Precise osteotomy: The multi-level guiding hole design ensures the accuracy of osteotomy and optimizes the prosthesis implantation effect.

[0111] This device provides a safe, stable and adjustable solution for knee osteotomy correction surgery, improving the surgical success rate and reducing the occurrence of postoperative complications.

[0112] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A femoral distal additional resection guiding osteotomy plate for knee joint flexion deformity, characterized in that, The femoral distal additional resection guiding osteotomy plate for knee joint flexion deformity comprises: A first osteotomy device and a second osteotomy device. The first osteotomy device is provided with a first positioning hole and a femoral distal osteotomy hole; the second osteotomy device comprises a fixing plate and an adjusting device. The fixing plate is provided with a second positioning hole. The adjusting device is connected with a first guiding device and a second guiding device; the first guiding device comprises a front end osteotomy hole, a front inclined osteotomy hole and a first connecting rod; the second guiding device comprises a rear inclined osteotomy hole, a rear condyle osteotomy hole and a second connecting rod; the first osteotomy device and the second osteotomy device are detachably connected through a pin and a pin hole.

2. The femoral distal additional resection guiding osteotomy plate for knee joint flexion deformity according to claim 1, characterized in that, The first guiding device is provided with a first guiding through hole, and the first guiding through hole is located between the front inclined osteotomy hole and the front end osteotomy hole.

3. The femoral distal plus-guided osteotomy plate for knee flexion deformity according to claim 1, wherein The second guiding device is provided with a second guiding through hole, and the second guiding through hole is located between the rear inclined osteotomy hole and the rear condyle osteotomy hole.

4. The femoral distal additional resection guiding osteotomy plate for knee joint flexion deformity according to claim 1, characterized in that, The adjusting device comprises an adjusting knob, a transmission rod, a first bevel gear, a second bevel gear, a third bevel gear, a first adjusting rod and a second adjusting rod; the two ends of the transmission rod are respectively connected with the adjusting knob and the third bevel gear; the third bevel gear is simultaneously meshed with the first bevel gear and the second bevel gear; the first bevel gear is connected with the first adjusting rod, and the second bevel gear is connected with the second adjusting rod.

5. The femoral distal additional resection guiding osteotomy plate for knee joint flexion deformity according to claim 4, characterized in that, The first adjusting rod is movably connected with the first guiding device, and the second adjusting rod is movably connected with the second guiding device.

6. The femoral distal additional resection guiding osteotomy plate for knee joint flexion deformity according to claim 1, characterized in that, The pin is arranged at one end of the first guiding device far away from the fixing plate, and the pin hole is arranged at one end of the first osteotomy device close to the femoral distal osteotomy hole.

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