Unicondylar replacement femoral prosthesis implant positioning device

Abstract

This invention relates to the field of femoral prosthesis implantation positioning technology, and discloses a unicompartmental femoral prosthesis implantation positioning device, including a femoral prosthesis. A positioning base is provided at the bone bed section of the femoral prosthesis, and an adjustment frame is provided on the front side of the positioning base. Both the positioning base and the adjustment frame have an adjustment mechanism on their inner sides. Each adjustment mechanism includes an adjustment cavity located inside the lower side of the adjustment frame. A circular groove is formed inside the adjustment cavity near the front end. An angle graduation is provided at one end of the adjustment frame near the circular groove. A guide frame is movably arranged inside the adjustment cavity and the circular groove. This unicompartmental femoral prosthesis implantation positioning device, through the coordinated use of a delivery component and a drive component, achieves different adjustment methods, accurately matching the anatomical morphology and planning of the femoral condyle of different patients, avoiding the need to replace the entire set of instruments, and improving instrument versatility and surgical efficiency.

Description

Technical Field

[0001] This invention relates to the field of femoral prosthesis implantation positioning technology, and particularly to a unicompartmental femoral prosthesis implantation positioning device. Background Technology

[0002] In unicompartmental hip arthroplasty, the femoral prosthesis implantation locator is the core instrument for achieving precise osteotomy and prosthesis alignment. Its osteotomy guide module directly determines the angle and thickness of the osteotomy plane, which is a crucial link in ensuring the subsequent prosthesis matching accuracy and improving surgical outcomes. Currently used femoral locators generally suffer from structural rigidity in their osteotomy guide modules. The tilt angle and groove height of the guide groove are fixed designs, making it impossible to flexibly adjust according to the differences in the patient's femoral condyle anatomy, the degree of lesion, and the needs of the surgical plan. Surgeons can only adapt to different osteotomy parameters by replacing the entire locator, which not only increases the variety and cost of surgical instruments but also prolongs the time for intraoperative instrument changes and alignment calibration, reducing surgical efficiency. At the same time, the inner wall of the existing guide groove is mostly a smooth planar structure. During the high-speed reciprocating cutting of the oscillating saw, the saw blade is easily affected by lateral cutting forces and swayed, making it difficult to maintain a stable linear motion trajectory. This results in wavy undulations or angular deviations on the osteotomy surface, failing to meet the requirements of a flat bone bed for prosthesis implantation, increasing the risk of postoperative prosthesis loosening, misalignment, and poor joint function recovery. Summary of the Invention

[0003] The main objective of this invention is to provide a unicompartmental femoral prosthesis implantation locator, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A unicompartmental femoral prosthesis implant locator includes a femoral prosthesis. A positioning base is provided at the bone bed section of the femoral prosthesis. An adjustment frame is provided on the front side of the positioning base. An adjustment mechanism is provided on the inner side of both the positioning base and the adjustment frame. The adjustment mechanism includes an adjustment cavity located inside the lower side of the adjustment frame. A circular groove is formed near the front end of the adjustment cavity. An angle scale is provided near the circular groove at one end of the adjustment frame. A guide frame is movably arranged inside the adjustment cavity and the circular groove. An arc-shaped block is fixedly arranged on the front side of the guide frame corresponding to the position of the circular groove. Two sets of first arrows are provided near the arc-shaped block at one end of the guide frame. An opening is formed on the inner side of the guide frame. A sealing strip is fixedly arranged at the rear end of the guide frame. Several sets of roller grooves are formed on the upper and lower sides of the inner side of the guide frame near the opening. Roller needles are movably arranged on the inner side of each of the roller grooves. An angle component is provided at the lower end of each roller needle.

[0005] Preferably, the corner assembly includes a fixing strip fixedly disposed at the lower end of the guide frame, a misalignment block rotatably disposed on one side of the fixing strip, a notch being provided on the lower side of the misalignment block, a spring strip fixedly disposed on one side of the fixing strip corresponding to the notch, a movable block sleeved on the outer side of the fixing strip, a slider fixedly disposed at one end of the movable block, a slot being provided on the movable block near the fixing strip, a connecting rod movably disposed on the inner side of the movable block, a threaded portion being provided on the front side of the connecting rod, a limit screw being threadedly fixedly disposed on the rear end of the connecting rod, a sliding groove being provided on the lower inner wall of the adjusting cavity corresponding to the position of the movable block, and a mating groove being provided on the lower inner wall of the adjusting cavity corresponding to the position of the fixing strip.

[0006] Preferably, the positioning base has two sets of positioning holes on its upper side, positioning sleeves are fixedly installed at both ends of the positioning base, an adapter port is opened in the middle of the positioning base, two sets of drilled holes are opened on the inner side of the adjusting frame corresponding to the adapter port, a support piece is fixedly installed at the rear end of the adjusting frame, two sets of movable grooves are opened on the front side of the positioning base, a slide bar is fixedly installed at the rear end of the adjusting frame corresponding to the two sets of movable grooves, an adjusting bolt is installed inside one side of the positioning base and the adjusting frame, a scale bar is installed at one end of the adjusting frame, and a second arrow is installed on the positioning base near the scale bar.

[0007] Preferably, the upper inner wall of the adjustment cavity is inclined, the guide frame is open on the side facing the first arrow, and the arc-shaped block is movably disposed inside the circular groove.

[0008] Preferably, the first arrow points to the corner scale position, the seal is fixed to the guide frame by screws, and the several groups of rollers are arranged horizontally and evenly.

[0009] Preferably, the fixing strip is inclined, the fixing strip is inserted into the docking groove to the slide groove position, the misalignment block is offset from the docking groove, the elastic strip is inserted into the inside of the notch, and the movable block is adapted to the slide groove.

[0010] Preferably, the slider is slidably disposed in the groove, the inner wall of the slot that fits against the fixing strip is set in an arc shape, the threaded part passes through the front side of the adjusting frame, the threaded part is threadedly connected to the adjusting frame, the limiting screw is restricted at the rear end of the movable block, and the docking groove is inclined.

[0011] Preferably, the positioning base and the adjustment frame are fitted together at right angles, the adjustment mechanism in the positioning base is set in an inclined state, the rear side of the adjustment mechanism in the positioning base is set with a square groove corresponding to the adapter port position, the support plate is supported on the bottom of the femoral prosthesis, the slide bar is slidably set inside the movable groove, the adjustment bolt is movably set with the positioning base, the adjustment bolt is threadedly connected with the adjustment frame, and the second arrow points to the scale bar position.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The entire unit is fixed to the bone bed by screws in conjunction with two sets of positioning holes and positioning sleeves. The support plate is placed on the bottom of the femoral prosthesis. Fixation holes are drilled into the femoral prosthesis bone bed through two sets of drill holes and adapter ports. According to the needs of patients undergoing minimally invasive surgery, the threaded adjustment frame can be driven to slide down along the movable groove by rotating the adjustment bolt, thereby lengthening and repositioning the positioning base and adjustment frame. Since the femoral condyle size varies significantly among people of different ages, genders and ethnicities, there is no need to design multiple sets of instruments for different sizes, which greatly reduces the types of instruments. Pinch the misalignment block and squeeze the spring clip, inserting it into the inner side of the docking groove until it reaches the inner side of the slide groove. At the same time, the fixing strip is engaged in the inner side of the slot. After entering the slide groove, the squeezed spring clip pushes the misalignment block back, causing the misalignment block to be misaligned with the docking groove and automatically positioned on the slot. For subsequent disassembly, the adjustment mechanism can be pulled out from the inside by pushing the misalignment block forward through the adjustment cavity, facilitating subsequent disassembly. When the angle of the guide frame needs to be adjusted, rotate the threaded part connected to the lower side of the adjustment frame to move the threaded part backward. At the same time, push the connected movable block and slider along the fixing strip. The movable block will then push the fixing strip and guide frame to rotate a certain range along the arc block position to achieve angle adjustment. This can accurately match the anatomical shape and planning of the femoral condyle of different patients, avoiding the need to change the entire set of instruments, improving instrument versatility and surgical efficiency. At the same time, it can flexibly correct osteotomy plane deviations during surgery, ensuring the accuracy of prosthesis implantation and postoperative joint function recovery. The guide frame is movably set in the circular groove via an arc-shaped block. With the use of the first arrow and the corner scale, the size of the angle can be determined and adjusted when the angle is rotated. The saw blade for cutting the femur is inserted into the movable opening, which restricts the saw blade to make lateral cutting work in the guide frame. The upper and lower sides of the saw blade are equipped with rollers that fit the saw blade. When working laterally on the saw blade, the rollers convert the contact plane friction into rolling friction, which can significantly reduce cutting resistance and wear, suppress saw blade wobble, thereby improving osteotomy accuracy and operation smoothness. The whole unit is also detachable, which facilitates subsequent cleaning and disinfection. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the positioning component structure of the present invention; Figure 3 This is a schematic diagram of the positioning base and adjustment frame structure of the present invention; Figure 4 This is a partial cross-sectional view of the positioning base and adjustment frame of the present invention; Figure 5 This is a schematic diagram of a portion of the adjusting frame and the lower adjusting mechanism of the present invention; Figure 6 This is a schematic diagram of the adjustment mechanism structure of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the lower structure of the guide frame of the present invention; Figure 8 This is a partial cross-sectional view of the corner component of the present invention; Figure 9 This is a schematic diagram of the adjustment mechanism structure of the present invention. Figure 2 .

[0014] In the diagram: 1. Femoral prosthesis; 2. Positioning base; 3. Adjustment frame; 4. Adjustment mechanism; 41. Adjustment cavity; 42. Circular groove; 43. Corner scale; 44. Guide frame; 45. Arc block; 46. First arrow; 47. Movable opening; 48. Sealing strip; 49. Roller groove; 410. Needle roller; 411. Corner assembly; 4111. Fixing strip; 4112. Misalignment block; 4113. Notch; 4114 4115. Spring bar; 4116. Movable block; 4117. Slider; 4118. Slot; 4119. Connecting rod; 4110. Threaded part; 41110. Limit screw; 41111. Slide groove; 41112. Butt groove; 5. Positioning hole; 6. Positioning sleeve; 7. Adapter port; 8. Drill hole; 9. Support plate; 10. Movable groove; 11. Slider; 12. Adjusting bolt; 13. Scale bar; 14. Second arrow. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0016] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship as a relative relationship of orientation or position, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0017] Please see Figures 1-9This invention provides an embodiment of a unicompartmental femoral prosthesis implantation locator, comprising a femoral prosthesis 1, a positioning base 2 disposed at the bone bed section of the femoral prosthesis 1, an adjustment frame 3 disposed at the front side of the positioning base 2, and an adjustment mechanism 4 disposed on the inner side of both the positioning base 2 and the adjustment frame 3. The adjustment mechanism 4 includes an adjustment cavity 41 disposed inside the lower side of the adjustment frame 3, a circular groove 42 formed inside the adjustment cavity 41 near the front end, and an angle scale 43 disposed at one end of the adjustment frame 3 near the circular groove 42. The adjustment cavity 41 and... A guide frame 44 is movably arranged inside the circular groove 42. An arc-shaped block 45 is fixedly arranged on the front side of the guide frame 44 corresponding to the position of the circular groove 42. Two sets of first arrows 46 are arranged on one end of the guide frame 44 near the position of the arc-shaped block 45. An movable opening 47 is opened on the inner side of the guide frame 44. A seal 48 is fixedly arranged on the rear end of the guide frame 44. Several sets of roller grooves 49 are opened on the upper and lower sides of the inner side of the guide frame 44 near the movable opening 47. A roller needle 410 is movably arranged on the inner side of each set of roller grooves 49. A corner component 411 is arranged at the lower end of the roller needle 410.

[0018] The upper inner wall of the adjusting cavity 41 is inclined, the guide frame 44 is open on the side of the first arrow 46, the arc block 45 is movably set inside the circular groove 42, the first arrow 46 points to the corner scale 43, the seal 48 is fixed to the guide frame 44 by screws, and several sets of needle rollers 410 are evenly arranged laterally.

[0019] The guide frame 44 is movably set in the circular groove 42 via the arc block 45. With the use of the first arrow 46 and the angle scale 43, the size of the angle can be determined and adjusted when the angle is rotated. The saw blade for cutting the femur is inserted into the movable port 47, which restricts the saw blade to make lateral cutting work in the guide frame 44. The upper and lower sides of the saw blade are equipped with roller needles 410 that fit the saw blade. When working laterally on the saw blade, the roller needles 410 convert the contact plane friction force into rolling friction, which can greatly reduce cutting resistance and wear, suppress saw blade wobble, thereby improving osteotomy accuracy and operation smoothness. The whole unit has a disassembly function, which facilitates subsequent cleaning and disinfection.

[0020] The corner assembly 411 includes a fixing strip 4111 fixedly mounted on the lower end of the guide frame 44. A misalignment block 4112 is rotatably mounted on one side of the fixing strip 4111. A notch 4113 is provided on the lower side of the misalignment block 4112. A spring strip 4114 is fixedly mounted on one side of the fixing strip 4111 corresponding to the position of the notch 4113. A movable block 4115 is sleeved on the outside of the fixing strip 4111. A slider 4116 is fixedly mounted on one end of the movable block 4115. The movable block 4115 is close to... A slot 4117 is provided at the position of the fixing strip 4111. A connecting rod 4118 is movably arranged inside the movable block 4115. A threaded part 4119 is provided at the front side of the connecting rod 4118. A limit screw 41110 is threadedly fixed at the rear end of the connecting rod 4118. A sliding groove 41111 is provided on the lower inner wall of the adjusting cavity 41 corresponding to the position of the movable block 4115. A mating groove 41112 is provided on the lower inner wall of the adjusting cavity 41 corresponding to the position of the fixing strip 4111.

[0021] The fixing strip 4111 is inclined and is inserted into the docking groove 41112 to the position of the slide groove 41111. The misalignment block 4112 is misaligned with the docking groove 41112. The spring strip 4114 is inserted into the inside of the notch 4113. The movable block 4115 is adapted to the slide groove 41111. The slider 4116 is slidably disposed in the slide groove 41111. The slot 4117 is arc-shaped and fits against the inner wall of the fixing strip 4111. The threaded part 4119 passes through the front of the adjusting frame 3 and is threadedly connected to the adjusting frame 3. The limiting screw 41110 is restricted at the rear end of the movable block 4115. The docking groove 41112 is inclined.

[0022] Pinch the misalignment block 4112 to compress the spring strip 4114, inserting it into the inner side of the mating groove 41112 until it reaches the inner position of the slide groove 41111. At the same time, the fixing strip 4111 engages with the inner side of the slot 4117. After entering the slide groove 41111, the compressed spring strip 4114 pushes the misalignment block 4112 back, causing the misalignment block 4112 to be misaligned from the mating groove 41112 and automatically positioned on the slot 4117. During subsequent disassembly, the adjustment mechanism 4 can be pulled out from the inside by pushing the misalignment block 4112 forward at the cavity 41, facilitating subsequent disassembly. When the angle of the guide frame 44 needs to be adjusted... The rotating threaded connection to the threaded part 4119 inside the lower side of the adjustment frame 3 causes the threaded part 4119 to move backward, while pushing the connected movable block 4115 and slider 4116 to slide along the fixed bar 4111. The movable block 4115 will push the fixed bar 4111 and guide frame 44 to rotate a certain range along the arc block 45, thereby achieving angle adjustment. This can accurately match the anatomical shape and planning of the femoral condyle of different patients, avoid changing the entire set of instruments, improve the versatility of instruments and surgical efficiency, and flexibly correct osteotomy plane deviation during surgery, ensuring the accuracy of prosthesis implantation and postoperative joint function recovery.

[0023] The positioning base 2 has two sets of positioning holes 5 on its upper side. Positioning sleeves 6 are fixedly installed at both ends of the positioning base 2. An adapter port 7 is opened in the middle of the positioning base 2. Two sets of drill holes 8 are opened on the inner side of the adjusting frame 3 corresponding to the adapter port 7. A support plate 9 is fixedly installed at the rear end of the adjusting frame 3. Two sets of movable grooves 10 are opened on the front side of the positioning base 2. Slide strips 11 are fixedly installed at the rear end of the adjusting frame 3 corresponding to the two sets of movable grooves 10. An adjusting bolt 12 is installed inside the positioning base 2 and the adjusting frame 3 on one side. A scale strip 13 is installed at one end of the adjusting frame 3. A second arrow 14 is installed on the positioning base 2 near the scale strip 13.

[0024] The positioning base 2 and the adjustment frame 3 are fitted together at right angles. The adjustment mechanism 4 in the positioning base 2 is set in an inclined state. The rear side of the adjustment mechanism 4 in the positioning base 2 is set with a square groove corresponding to the adapter port 7. The support plate 9 is supported on the bottom of the femoral prosthesis 1. The slide bar 11 is slidably set inside the movable groove 10. The adjustment bolt 12 is movable to the positioning base 2. The adjustment bolt 12 is threadedly connected to the adjustment frame 3. The second arrow 14 points to the position of the scale bar 13.

[0025] The entire assembly is fixed to the bone bed by screws through two sets of positioning holes 5 and positioning sleeves 6. The support plate 9 is supported at the bottom of the femoral prosthesis 1. Fixing holes are drilled on the bone bed of the femoral prosthesis 1 through two sets of drilling holes 8 and fitting ports 7. According to the needs of patients undergoing minimally invasive surgery, the threaded adjustment frame 3 can be driven to slide downward along the movable groove 10 by rotating the adjustment bolt 12, thereby lengthening and repositioning the positioning base 2 and the adjustment frame 3. Since the femoral condyle size varies significantly among people of different ages, genders and ethnicities, it is not necessary to design multiple sets of instruments for different sizes, which greatly reduces the types of instruments.

[0026] Working principle: Based on the patient's femoral condyle imaging data and surgical plan, the entire unit is fixed to the bone bed through two sets of positioning holes 5 and positioning sleeves 6 with screws. The support plate 9 is placed on the bottom of the femoral prosthesis 1. Fixation holes are drilled into the bone bed of the femoral prosthesis 1 through two sets of drilling holes 8 and fitting ports 7. According to the needs of minimally invasive surgery patients, the threaded adjustment frame 3 can be driven to slide downward along the movable groove 10 by rotating the adjustment bolt 12, which lengthens and repositions the positioning base 2 and the adjustment frame 3. Thus, since the femoral condyle size varies significantly among different age groups, genders, and ethnic groups, it is not necessary to design multiple sets of instruments for different sizes, greatly reducing the need for separate design. Instrument type; secondly, pinch the misalignment block 4112 to squeeze the spring bar 4114, insert it into the inside of the docking groove 41112 until it reaches the inside of the slide groove 41111. At the same time, the fixing bar 4111 is inserted into the inside of the slot 4117. After entering the slide groove 41111, the squeezed spring bar 4114 pushes back the misalignment block 4112, so that the misalignment block 4112 is misaligned from the docking groove 41112 and automatically positioned on the slot 4117. During subsequent disassembly, the adjustment mechanism 4 can be pulled out from the inside by pushing the misalignment block 4112 forward at the cavity 41, which facilitates subsequent disassembly. When it is necessary to adjust the angle of the guide frame 44, The rotating threaded connection to the threaded portion 4119 inside the lower side of the adjusting frame 3 causes the threaded portion 4119 to move rearward, simultaneously pushing the connected movable block 4115 and slider 4116 to slide along the fixing bar 4111. The movable block 4115 then pushes the fixing bar 4111 and guide frame 44 to rotate a certain range along the arc-shaped block 45, achieving angle adjustment. This allows for precise matching of the anatomical shape and planning of the femoral condyle for different patients, avoiding the need to replace the entire set of instruments, improving instrument versatility and surgical efficiency. It also allows for flexible correction of osteotomy plane deviations during surgery, ensuring prosthesis implantation accuracy and postoperative joint function recovery. Additionally, the guide frame 44... The arc-shaped block 45 is movably set in the circular groove 42. With the use of the first arrow 46 and the angle scale 43, the size of the angle can be judged and adjusted when the angle is rotated. The saw blade for cutting the femur is inserted into the movable port 47, which restricts the saw blade to make lateral cutting work in the guide frame 44. The upper and lower sides of the saw blade are equipped with roller needles 410 that fit the saw blade. When working laterally on the saw blade, the roller needles 410 convert the contact plane friction force into rolling friction, which can greatly reduce cutting resistance and wear, suppress saw blade wobble, thereby improving osteotomy accuracy and operation smoothness. The whole unit has a disassembly function, which facilitates subsequent cleaning and disinfection.

[0027] The electrical equipment in this invention is used in conjunction with existing technical features or components, and the connection and usage methods are common knowledge in the field. Its working principle is a known technology, and the appropriate model is selected according to actual use, so it will not be explained in detail.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A unicompartmental femoral prosthesis implantation locator, comprising a femoral prosthesis (1), characterized in that: A positioning base (2) is provided at the bone bed section of the femoral prosthesis (1). An adjustment frame (3) is provided on the front side of the positioning base (2). An adjustment mechanism (4) is provided on the inner side of both the positioning base (2) and the adjustment frame (3). The adjustment mechanism (4) includes an adjustment cavity (41) located inside the lower side of the adjustment frame (3). A circular groove (42) is provided inside the adjustment cavity (41) near the front end. An angle scale (43) is provided at one end of the adjustment frame (3) near the circular groove (42). A guide frame (44) is movably provided on the inner side of the adjustment cavity (41) and the circular groove (42). An arc-shaped block (45) is fixedly provided on the front side of the guide frame (44) corresponding to the circular groove (42). Two sets of first arrows (46) are provided on one end of the guide frame (44) near the arc-shaped block (45). An movable opening (47) is provided on the inner side of the guide frame (44). A sealing strip (48) is fixedly provided on the rear end of the guide frame (44). Several sets of roller grooves (49) are provided on the upper and lower sides of the inner side of the guide frame (44) near the movable opening (47). A roller needle (410) is movably provided on the inner side of the several sets of roller grooves (49). A corner component (411) is provided at the lower end of the roller needle (410).

2. The unicompartmental femoral prosthesis implantation locator according to claim 1, characterized in that: The corner assembly (411) includes a fixing strip (4111) fixedly mounted at the lower end of the guide frame (44). A misalignment block (4112) is rotatably mounted on one side of the fixing strip (4111). A notch (4113) is provided on the lower side of the misalignment block (4112). A spring strip (4114) is fixedly mounted on one side of the fixing strip (4111) corresponding to the notch (4113). A movable block (4115) is fitted around the outside of the fixing strip (4111). A slider (4116) is fixedly mounted at one end of the movable block (4115). A slot (4117) is provided near the fixed strip (4111). A connecting rod (4118) is movably arranged inside the movable block (4115). A threaded part (4119) is provided on the front side of the connecting rod (4118). A limit screw (41110) is threadedly fixed at the rear end of the connecting rod (4118). A sliding groove (41111) is provided on the lower inner wall of the adjusting cavity (41) corresponding to the movable block (4115). A mating groove (41112) is provided on the lower inner wall of the adjusting cavity (41) corresponding to the fixed strip (4111).

3. The unicompartmental femoral prosthesis implantation locator according to claim 1, characterized in that: The positioning base (2) has two sets of positioning holes (5) on its upper side. Positioning sleeves (6) are fixedly installed at both ends of the positioning base (2). An adapter port (7) is opened in the middle of the positioning base (2). Two sets of drill holes (8) are opened on the inner side of the adjusting frame (3) corresponding to the adapter port (7). A support plate (9) is fixedly installed at the rear end of the adjusting frame (3). Two sets of movable grooves (10) are opened on the front side of the positioning base (2). Slide strips (11) are fixedly installed at the rear end of the adjusting frame (3) corresponding to the two sets of movable grooves (10). An adjusting bolt (12) is installed inside one side of the positioning base (2) and the adjusting frame (3). A scale strip (13) is installed at one end of the adjusting frame (3). A second arrow (14) is installed on the positioning base (2) near the scale strip (13).

4. The unicompartmental femoral prosthesis implantation locator according to claim 1, characterized in that: The upper inner wall of the adjustment cavity (41) is inclined, the guide frame (44) is open on the side facing the first arrow (46), and the arc block (45) is movably disposed inside the circular groove (42).

5. The unicompartmental femoral prosthesis implantation locator according to claim 1, characterized in that: The first arrow (46) points to the corner scale (43) position, the seal (48) is fixed to the guide frame (44) by screws, and several sets of the rollers (410) are arranged horizontally and evenly.

6. The unicompartmental femoral prosthesis implantation locator according to claim 2, characterized in that: The fixing strip (4111) is inclined and is inserted into the docking groove (41112) to the position of the slide groove (41111). The misalignment block (4112) is misaligned with the docking groove (41112). The elastic strip (4114) is inserted into the inside of the notch (4113). The movable block (4115) is adapted to the slide groove (41111).

7. The unicompartmental femoral prosthesis implantation locator according to claim 2, characterized in that: The slider (4116) is slidably disposed in the groove (41111), the slot (4117) is arranged in an arc shape to fit the inner wall of the fixing strip (4111), the threaded part (4119) passes through the front side of the adjusting frame (3), the threaded part (4119) is threadedly connected to the adjusting frame (3), the limiting screw (41110) is restricted to the rear end of the movable block (4115), and the docking groove (41112) is inclined.

8. The unicompartmental femoral prosthesis implantation locator according to claim 3, characterized in that: The positioning base (2) and the adjustment frame (3) are fitted together at right angles. The adjustment mechanism (4) in the positioning base (2) is set in an inclined state. The adjustment mechanism (4) in the positioning base (2) is set in a square groove on the rear side corresponding to the fitting port (7). The support plate (9) is supported on the bottom of the femoral prosthesis (1). The slide bar (11) is slidably set inside the movable groove (10). The adjustment bolt (12) is movably set with the positioning base (2). The adjustment bolt (12) is threadedly connected with the adjustment frame (3). The second arrow (14) points to the scale bar (13).

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