A bone guide plate assembly for a patella and a cutting device

Abstract

The utility model relates to medical instrument technical field, concretely is a kind of guide bone plate assembly and cutting device for patella, guide bone plate assembly includes patella fixing plate, with first accommodating space and positioning connecting piece;Positioning assembly, positioning assembly is connected with patella fixing plate;First guide piece, first guide piece is set in first accommodating space;First guide piece has first guide channel;Second guide piece, has second guide channel;First bone chisel can move along the depth direction of first guide channel and second bone chisel can move along the depth direction of second guide channel to resect patella, to intercept the patella of the same shape as the shape of first guide channel;The utility model can realize patella-femur matching, form adaptability is promoted, avoid to appear extrusion uneven or bone block fragmentation, and then realize the standardization of patella bone block and tendon, anatomical adaptability material taking, fundamentally improve the reliability of anterior cruciate ligament reconstruction and ligament reconstruction stability.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a guide plate assembly and cutting device for the patella. Background Technology

[0002] Anterior cruciate ligament (ACL) reconstruction is a common surgery in sports medicine. Among them, patellofemoral-quadriceps tendon (BPTB) grafts are widely used for primary reconstruction and revision surgery due to their rapid bone-to-bone healing and high mechanical strength. However, existing surgical instruments have significant limitations in the harvesting and preparation of BPTB grafts, directly affecting surgical precision, graft biomechanical properties, and postoperative rehabilitation outcomes.

[0003] Currently, the acquisition of BPTB grafts mainly relies on general orthopedic instruments (such as oscillating saws, bone chisels, and manual tendon harvesting knives), lacking standardized tools specifically for patellar bone fragment harvesting and tendon cutting. This leads to the following core problems: First, inaccurate control of patellar bone fragment morphology; specifically, patellar bone fragment harvesting is usually done by the surgeon using a common bone saw based on experience, lacking precise guiding control. Due to the irregular anatomical shape and uneven bone density of the patella, manual operation easily causes the bone fragment size (length, width, depth) to deviate from the preset values, resulting in a mismatch between the bone fragment and the femoral tunnel. This mismatch can trigger a "windshield wiper effect" or "bungee jump effect" during graft fixation, increasing the risk of bone fragment fragment fracture, fixation failure, and delayed healing. Second, the lack of standardization in tendon harvesting; specifically, tendon harvesting relies on manual tendon harvesting instruments, whose cutting depth and width lack mechanical limits or visual guidance. Differences in surgeon's touch can easily lead to the tendon being preserved too thinly (or even partially ruptured), potentially resulting in patellar tendon contracture, rupture, or donor site complications (such as prepatellar pain and extensor mechanism dysfunction). More importantly, insufficient biomechanical adaptation, specifically the morphological fit between the bone block and the tunnel, is crucial for achieving initial stability and promoting bone-to-bone healing. Non-standardized bone block morphology (such as wedge-shaped or asymmetrical cuts) can lead to uneven compression within the tunnel, reducing interfacial compressive stress and affecting the healing biological environment. Utility Model Content

[0004] To address the aforementioned technical issues, this invention ensures that the size and shape of the tunnels in the excised patella and femur remain consistent, achieving patella-femur matching, improving morphological adaptability, and avoiding uneven compression or bone fragmentation. This, in turn, enables standardized and anatomically adapted patellar bone fragment and tendon sampling, fundamentally improving the reliability and stability of anterior cruciate ligament reconstruction.

[0005] This utility model provides a guide plate assembly for the patella, comprising: A patellar fixation plate has a first receiving space and a positioning connector, wherein the positioning connector is disposed on one side of the first receiving space; A positioning component capable of abutting and fixing to the patella, the positioning component being disposed on the side of the patellar fixation plate away from the positioning connector, and the positioning component being connected to the patellar fixation plate; A first guide member is disposed within a first receiving space and is detachably connected to the patellar fixation plate; the first guide member has a first guide channel, which can accommodate a first bone chisel. The second guide member, which is detachably connected to the positioning connector, has a second guide channel, which can accommodate the second bone chisel. The second guide channel is disposed below the first guide channel, and the depth direction of the first guide channel is perpendicular to the depth direction of the second guide channel; the first bone chisel can move along the first guide channel and the second bone chisel can move along the depth direction of the second guide channel to remove the patella, so as to cut the patella with the same cross-sectional shape as the first guide channel.

[0006] Furthermore, the positioning component includes a first positioning component and a second positioning component, which are disposed opposite to each other on both sides of the patellar fixation plate; The first positioning component and the second positioning component have the same structure. The first positioning component includes a knob component and a pin clamping component that are connected to each other. The knob assembly is connected to the patellar fixation plate, the clamping pin assembly can abut against the patella, and the knob assembly can rotate relative to the patellar fixation plate to move the clamping pin assembly toward or away from the patella.

[0007] Furthermore, the patellar fixation plate includes a connecting part and a mounting part, which are connected to each other to form a T-shaped structure.

[0008] Furthermore, the knob assembly of the first positioning component and the knob assembly of the second positioning component are disposed opposite to each other at both ends of the connecting portion, and the pin clamping assembly of the first positioning component and the pin clamping assembly of the second positioning component are disposed opposite to each other on both sides of the mounting portion.

[0009] Furthermore, the connecting portion is provided with a protrusion for placing the tendon connected to the patella.

[0010] Furthermore, the second guide member is provided with mounting holes that are compatible with the positioning connector; The mounting hole is fitted onto the positioning connector, and the positioning connector abuts against the side of the patellar fixation plate where the positioning connector is located.

[0011] Furthermore, the depth direction of the first guide channel is consistent with the thickness direction of the first guide member; The depth direction of the second guide channel is consistent with the thickness direction of the second guide member.

[0012] Furthermore, the first guide channel has a U-shaped structure.

[0013] This utility model also protects a cutting device, including a depth-limiting drill bit, a first bone chisel, a second bone chisel, a longitudinal ligament separator, a transverse ligament separator, a tendon extractor, a femoral drill locator, a femoral knife, a femoral trial mold knife, and a guide plate assembly for the patella as described above. The ligament longitudinal separator is used to longitudinally cut the tendon; The ligament transverse separator is used to cut the tendon transversely; The tendon extractor is used to sever the distal end of the tendon that has been cut by the longitudinal ligament separator and the transverse ligament separator. The depth-limiting drill bit drills a hole in the patella through the first guide channel; The first bone chisel cuts the patella through the first guide channel; The second bone chisel cuts the patella through the second guide channel; The femoral cutter is used to cut the femur where the tendon is to be installed; The femoral trial molding cutter includes a trial molding cutter head, which is used to cut the femur again after it has been cut by the femoral cutter to form a patella mounting hole, which can be used to install the cut patella.

[0014] Furthermore, the cross-sectional shape and size of the test mold cutter head are consistent with the shape and size of the first guide channel.

[0015] Implementing the embodiments of this utility model has the following beneficial effects: In this invention, the guide plate assembly cooperates with the first and second bone chisels. The first bone chisel moves along the first guide channel to cut the patella in a first direction, while the second bone chisel moves along the depth direction of the second guide channel to cut the patella again after it has been cut by the first bone chisel. This allows for the removal of patellar fragments with a cross-sectional shape identical to that of the first guide channel, improving the accuracy of patellar fragment removal. Simultaneously, by setting a first guide channel that matches the size and shape of the femoral tunnel, the size and shape of the removed patella and the femoral tunnel are kept consistent, achieving patella-femoral matching and improving morphological adaptability. This avoids uneven compression or fragment fracture, thereby achieving standardized and anatomically adapted patellar fragment and tendon harvesting, fundamentally improving the reliability and stability of anterior cruciate ligament reconstruction. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this utility model. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0017] Figure 1 This is an isometric view of the guide plate assembly for the patella described in this embodiment; Figure 2 This is a front view of the guide plate assembly for the patella described in this embodiment; Figure 3 This is a left view of the guide plate assembly for the patella described in this embodiment; Figure 4 This is a top view of the guide plate assembly for the patella described in this embodiment; Figure 5 This is a structural diagram of the patellar fixation plate described in this embodiment; Figure 6 This is a structural diagram of the depth-limiting drill bit described in this embodiment; Figure 7 This is a structural diagram of the first bone chisel in this embodiment; Figure 8 This is a cross-sectional view of the longitudinal ligament separator described in this embodiment; Figure 9 This is a left view of the longitudinal ligament separator described in this embodiment; Figure 10 This is a cross-sectional view of the ligament transverse separator described in this embodiment; Figure 11 This is a left view of the ligament transverse separator described in this embodiment; Figure 12 This is a structural diagram of the tendon extraction device described in this embodiment; Figure 13 This is a structural diagram of the drill bit positioner described in this embodiment; Figure 14 This is a cross-sectional view of the drill bit locator described in this embodiment; Figure 15 This is a structural diagram of the femoral knife described in this embodiment; Figure 16 This is a structural diagram of the femoral trial molding blade described in this embodiment; Figure 17 This is a cross-sectional view of the femoral test mold blade described in this embodiment.

[0018] The corresponding reference numerals in the figure are as follows: 1-Guide plate assembly; 2-Depth-limiting drill bit; 3-First bone chisel; 4-Longitudinal ligament separator; 5-Transverse ligament separator; 6-Tendon extractor; 7-Femoral drill locator; 8-Femoral blade; 9-Femoral trial molding blade; 11-Patent fixation plate; 12-First positioning assembly; 13-Second positioning assembly; 14-First guide; 15-Second guide; 91-Trial molding blade head; 111-First receiving space; 112-Positioning connector; 113-Connecting part; 114-Mounting part; 115-Protrusion; 121-Knob assembly; 122-Pin clamp assembly; 141-First guide channel; 151-Second guide channel. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the terms "upper," "lower," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the present invention and for 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 the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0022] See appendix Figures 1 to 17This embodiment provides a guide plate assembly for the patella, including: a patellar fixation plate 11 having a first receiving space 111 and a positioning connector 112, the positioning connector 112 being disposed on one side of the first receiving space 111; a positioning component capable of abutting and fixing to the patella, the positioning component being disposed on the side of the patellar fixation plate 11 away from the positioning connector 112, the positioning component being connected to the patellar fixation plate 11; and a first guide member 14, the first guide member 14 being disposed within the first receiving space 111, and the first guide member 14 being detachably connected to the patellar fixation plate 11; The first guide member 14 has a first guide channel 141, which can accommodate the first bone chisel 3; the second guide member 15, which is detachably connected to the positioning connector 112, has a second guide channel 151, which can accommodate the second bone chisel; the second guide channel 151 is located below the first guide channel 141, and the depth direction of the first guide channel 141 is perpendicular to the depth direction of the second guide channel 151; the first bone chisel 3 can move along the first guide channel 141 and the second bone chisel 3 can move along the second guide channel 141. The guide plate assembly 1 moves along the depth direction of 51 to remove the patella, so as to cut a patella with a cross-sectional shape identical to that of the first guide channel 141; the guide plate assembly 1 in this utility model cooperates with the first bone chisel 3 and the second bone chisel respectively, so that the first bone chisel 3 moves along the first guide channel 141 to cut the patella in the first direction, and the second bone chisel can move along the depth direction of the second guide channel to cut the patella again after it has been cut by the first bone chisel 3, so as to cut a patella with a cross-sectional shape identical to that of the first guide channel 141, thereby improving the accuracy of patellar bone fragment cutting; at the same time By setting a first guide channel 141 that matches the size and shape of the tunnel in the femur, it is possible to ensure that the size and shape of the tunnel in the excised patella and femur are consistent, thereby achieving patella-femur matching, improving morphological adaptability, avoiding uneven compression or bone fragmentation, and thus achieving standardized and anatomically adapted material harvesting of patellar bone fragments and tendons, fundamentally improving the reliability and stability of anterior cruciate ligament reconstruction; wherein, the first direction is consistent with the depth direction of the first guide channel 141, and the second direction is consistent with the depth direction of the second guide channel 151.

[0023] In this embodiment, the number of positioning connectors 112 is not limited, as long as the second guide 15 can be detachably connected to the patellar fixation plate 11 through the positioning connectors 112.

[0024] Preferably, there are two positioning connectors 112, which are spaced apart on the patellar fixation plate 11. The second guide 15 is connected to the patellar fixation plate 11 through the two positioning connectors 112. By setting two positioning connectors 112, the installation stability and positioning accuracy of the second guide 15 can be improved, thus ensuring the positioning accuracy of the second guide channel 151 relative to the patella, and thus ensuring the accuracy of patellar cutting.

[0025] In this embodiment, a first connecting structure is provided on the side wall of the first accommodating space 111, and a second connecting structure adapted to the first connecting structure is provided on the side wall of the first guide member 14; the first guide member 14 and the first accommodating space 111 are connected by the first connecting structure and the second connecting structure.

[0026] Specifically, the first and second connecting structures are abutment structures or snap-fit ​​structures.

[0027] In some possible embodiments, the positioning components include a first positioning component 12 and a second positioning component 13, which are disposed opposite to each other on both sides of the patellar fixation plate 11. The first positioning component 12 and the second positioning component 13 have the same structure. The first positioning component 12 includes a knob component 121 and a clamping pin component 122 connected to each other. The knob component 121 is connected to the patellar fixation plate 11, and the clamping pin component 122 can abut against the patella. The knob component 121 can rotate relative to the patellar fixation plate 11 to drive the clamping pin component 122 to move toward or away from the patella. The above configuration can ensure accurate positioning of the patella and quick clamping of the patella. By setting the independent first positioning component 12 and the second positioning component 13, clamping and positioning of patellas of multiple sizes can be achieved, thereby improving the fit range and user experience.

[0028] In this embodiment, the pin clamping assembly 122 includes a mounting plate and a plurality of pin clamps. The knob assembly 121 is connected to the mounting plate, and the rotating assembly 121 can drive the mounting plate to move back and forth. The plurality of pin clamps are spaced apart along the length direction of the mounting plate.

[0029] Specifically, the clip has an installation end and an abutment tip that are positioned opposite each other. The installation end is fixedly connected to or detachably connected to the mounting plate, and the abutment tip can abut and fix against the patella.

[0030] In this embodiment, the knob assembly 121 includes a knob and a connecting assembly. The first end of the connecting assembly is fixedly connected to the knob. The connecting assembly is disposed in the installation channel of the patellar fixation plate 11. The connecting assembly is threadedly connected to the installation channel. The second end of the connecting assembly is connected to the clamping pin assembly 122. The knob and the connecting assembly can rotate relative to the installation channel to drive the clamping pin assembly 122 to move toward or away from the patella.

[0031] Specifically, the length of the connecting component is greater than the length of the installation channel. The specific length of the connecting component is not limited, as long as the connecting component can drive the clamping pin assembly 122 to move back and forth.

[0032] In some possible embodiments, the patellar fixation plate 11 includes a connecting part 113 and a mounting part 114. The connecting part 113 and the mounting part 114 are connected to each other to form a T-shaped structure. With the above arrangement, the knob assembly 121 and the clip assembly 122 connected to the patellar fixation plate 11 can be reasonably arranged.

[0033] In this embodiment, one end of the mounting part 114 is located in the middle of the connecting part 113, and the other end of the mounting part 114 extends toward the side away from the connecting part 113, so that the connecting part 113 and the mounting part 114 form a T-shaped structure after being connected.

[0034] Specifically, the mounting part 114 includes a first mounting part and a second mounting part disposed opposite to each other. The first end of the first mounting part and the first end of the second mounting part are both fixedly connected to the middle position of the connecting part 113. The second end of the first mounting part and the second end of the second mounting part both extend toward the side away from the connecting part 113.

[0035] Specifically, the middle position of the first mounting part and the connecting part 113 and the second mounting part surround to form a first receiving space 111 with an opening on one side, and a second guide member 14 is provided at the opening end of the first receiving space 111.

[0036] Furthermore, a positioning connector 112 is provided at the second end of the first mounting part, another positioning connector 112 is provided at the second end of the second mounting part, and mounting holes corresponding to the two positioning connectors 112 are provided on the second guide member 15.

[0037] In some possible embodiments, the connecting portion 113 is provided with a protrusion 115, which is used to place the tendon connected to the patella. By providing the protrusion 115, it is easier to place the cut tendon, avoid interference between the cut tendon and the cutting tool, and prevent damage to the cut tendon, thereby ensuring the success of tendon transplantation.

[0038] In this embodiment, the protrusion 115 is located in the middle of the connecting portion 113, so that the cut tendon can be placed on the protrusion 115 after passing through the first receiving space 111; the protrusion direction of the protrusion 115 is consistent with the thickness direction of the patellar fixation plate 11, and the protrusion 115 is set to protrude towards the side away from the patella.

[0039] Specifically, the specific structure of the protrusion 115 is not limited, as long as the protrusion 115 can accommodate the tendon.

[0040] Preferably, the protrusion 115 is a bridge-shaped protrusion structure located in the middle of the connecting portion 113.

[0041] In some possible embodiments, the knob assembly 121 of the first positioning component 12 and the knob assembly of the second positioning component 13 are disposed opposite to each other at both ends of the connecting portion 113, and the clamping pin assembly 122 of the first positioning component 12 and the clamping pin assembly of the second positioning component 13 are disposed opposite to each other on both sides of the mounting portion 114. By symmetrically arranging the first positioning component 12 and the second positioning component on both sides of the patellar fixation plate 11, the positioning stability of the first positioning component 12 and the second positioning component 13 on the patella can be guaranteed, while improving the overall aesthetics of the guide plate assembly 1.

[0042] In this embodiment, the first positioning component 12 and the second positioning component 13 are symmetrically arranged on both sides of the patellar fixation plate 11, which facilitates the clamping and fixation of the patella.

[0043] Specifically, the knobs of the first positioning component 12 and the second positioning component 13 are respectively located at opposite ends of the connecting part 113. The pin clamping component 122 in the first positioning component 12 and the pin clamping component in the second positioning component 13 are symmetrically arranged on opposite sides of the mounting part 114, and the length direction of the pin clamping component 122 is consistent with the length direction of the mounting part 114. The arrangement direction of the multiple pin clamps is consistent with the length direction of the mounting part 114.

[0044] In some possible embodiments, the second guide member 15 is provided with a mounting hole that is adapted to the positioning connector 112; the mounting hole is sleeved on the positioning connector 112, and the positioning connector 112 abuts against the side of the patellar fixation plate 11 where the positioning connector 112 is provided. By providing a mounting hole that is adapted to the positioning connector 112, the second guide member 15 can be quickly positioned and installed, thereby improving the installation speed of the second guide member 15.

[0045] In this embodiment, the number of mounting holes provided on the second guide member 15 is not limited, as long as the mounting holes correspond one-to-one with the positioning connector 112.

[0046] Specifically, the mounting hole is located above the second guide channel 151, and the extension direction of the second guide channel 151 is consistent with the axial direction of the mounting hole.

[0047] In some possible embodiments, the depth direction of the first guide channel 141 is consistent with the thickness direction of the first guide member 14; the depth direction of the second guide channel 151 is consistent with the thickness direction of the second guide member 15. With the above settings, it can be ensured that after the patella is cut along the first guide channel 141 and the second guide channel 151, the patella can be removed, simplifying the cutting steps and improving the patella removal rate.

[0048] In this embodiment, the depth direction of the second guide channel 151 is consistent with the length direction of the mounting portion 114.

[0049] In some possible embodiments, the first guide channel 141 is U-shaped. The above configuration can ensure that the shape of the first guide channel 141 is consistent with the shape of the femoral tunnel, thereby achieving the effect of patella-femur matching quickly.

[0050] In this embodiment, the first guide channel 141 is a trapezoidal groove with a short surface length of 6-10 mm and a long surface length of 10-14 mm.

[0051] This utility model also protects a cutting device, including a depth-limiting drill bit 2, a first bone chisel 3, a second bone chisel, a longitudinal ligament separator 4, a transverse ligament separator 5, a tendon extractor 6, a femoral drill locator 7, a femoral knife 8, a femoral trial mold knife 9, and a guide plate assembly for the patella as described above. The longitudinal ligament separator 4 is used for longitudinal cutting of tendons; The ligament transverse separator 5 is used for transverse cutting of tendons; The tendon extractor 6 is used to cut the distal end of the tendon that has been cut by the longitudinal ligament separator 4 and the transverse ligament separator 5. The depth-limiting drill bit 2 drills a hole in the patella through the first guide channel 141; The first bone chisel 3 cuts the patella through the first guide channel 141; The second bone chisel cuts the patella through the second guide channel 151; The femoral cutter 8 is used to cut the femur where tendons are to be installed; The femoral trial molding knife 9 includes a trial molding knife head 91, which is used to re-cut the femur after it has been cut by the femoral knife 8 to form a patellar mounting hole. The patellar mounting hole can be used to install the cut patella. By using the ligament longitudinal separator 4, the ligament transverse separator 5, and the tendon extractor 6 in conjunction to cut the tendon, it is possible to cut the tendon to the required size, thereby avoiding the problem of the cutting size not meeting the required size due to the lack of mechanical limit or visual guidance for the cutting depth and width, or the problem of the patellar tendon remaining part being too thin, which increases the risk of patellar tendon contracture or rupture after surgery. At the same time, the guide plate assembly 1 cooperates with the first bone chisel 3 and the second bone chisel respectively to realize that the first bone chisel 3 moves along the first guide channel 1. 41 moves to cut the patella in the first direction. The second bone chisel can move along the depth direction of the second guide channel to cut the patella again after it has been cut by the first bone chisel 3, so as to cut the patella with the same cross-sectional shape as the first guide channel 141, thereby improving the accuracy of patellar bone fragment cutting. At the same time, by setting the first guide channel 141 that matches the tunnel size and shape of the femur, it can be ensured that the size and shape of the cut patella and the femur tunnel are consistent, so as to achieve patella-femur matching, improve morphological adaptability, avoid uneven compression or bone fragment fragmentation, and thus achieve standardized and anatomically adapted material harvesting of patellar bone fragments and tendons, fundamentally improving the reliability and stability of anterior cruciate ligament reconstruction.

[0052] Specifically, the depth-limiting drill bit 2 is equipped with a depth-limiting design, and preferably, the depth-limiting drill bit 2 is equipped with scale lines to achieve depth-limited drilling.

[0053] Specifically, the first bone chisel 3 is adapted to the size of the first guide channel 141. The first bone chisel 3 is used for longitudinal bone cutting of the patella, cutting the patella from the patella guide plate. The first bone chisel 3 is provided with a depth limit design, which can fully separate the patellar pieces after the depth limit drill bit is used. Preferably, the first bone chisel 3 is provided with scale lines to achieve depth limit bone cutting.

[0054] Specifically, the second bone chisel is adapted to the size of the second guide channel 151. The second bone chisel is used for longitudinal bone cutting of the patella, cutting the patella from the patella guide plate. The second bone chisel is designed with a limited depth to ensure that the patella is fully cut. It can fully separate the patellar pieces after the first bone chisel 3 is used. Preferably, the second bone chisel is provided with scale lines to achieve limited depth bone cutting.

[0055] Specifically, the longitudinal ligament separator 4 has a concave opening that extends longitudinally downwards, allowing for the separation of tendons along the tendon fibers according to the size of the opening. The longitudinal ligament separator 4 is equipped with graduation lines, allowing the removal of tendons of the corresponding length as needed.

[0056] Specifically, the ligament transverse separator 5 has a concave opening that is transverse, allowing the tendon to be separated along the tendon fiber according to the size of the opening. The ligament transverse separator 5 is equipped with scale lines, allowing the tendon of the corresponding diameter to be removed as needed.

[0057] Specifically, the tendon extractor 6 is equipped with scale lines. The front end of the tendon extractor 6 is an opening through which the tendon passes into the tool. Then the tool can be pushed along the tendon to the required scale position. Through the closing shearing action of the inner and outer rods, the tendon at the other end of the patella is cut subcutaneously, resulting in a graft with a patella slice at one end and the quadriceps tendon at the other end.

[0058] Specifically, the femoral drill locator is divided into upper and lower modules. The removed graft is placed in the lower module and then the upper module is pressed on. There is a hole at the top to facilitate subsequent patellar drilling, which is used to place the traction wire after drilling.

[0059] Specifically, the femoral blade 8 has a separation blade at the front end and a hollow design to separate the femoral cortex.

[0060] Specifically, the femoral trial molding cutter 9 has a trial molding cutter head 91 that matches the groove size of the patellar guide plate, and compacts a bone channel of the patellar block size in the femur.

[0061] Operation of the cutting device: Step 1: Removal of the quadriceps tendon and patellar bone fragment. Specifically, an incision is made in front of the patella to expose half of the superior pole of the patella. The space between the subcutaneous tissue and the quadriceps tendon is separated, preserving the tendon's attachment to the proximal patella. The quadriceps tendon is cut using a longitudinal ligament separator 4 and a transverse ligament separator 5 to separate the quadriceps tendon to the required size. Then, a tendon extractor 6 is pushed in to sever the distal end of the tendon. After the quadriceps tendon is harvested, the first positioning component 12 and the second positioning component 13 are respectively positioned against the patella to clamp the patella and install the patellar fixation plate 11. The first guide 14 is placed in the first receiving space 111 and fixedly connected to the patellar fixation plate 11. The depth-limiting drill bit 2 is used to drill a hole in the patella along the first guide channel 141. The first bone chisel 3 is used to cut the patella along the first guide channel 141 to remove the patella longitudinally along the patellar fixation plate 11. The second guide 15 is then installed onto the patella via the positioning connector 112. Fixation plate 11, flip the vastus medius muscle, and use the second bone chisel to make a transverse cut to the patella along the second guide channel 151; after removing the integrally connected patellar bone block and quadriceps tendon, place the femoral drill locator 7 on the patellar bone block to drill holes, and place traction sutures in the drilled holes; second step: femoral bone tunnel establishment: specifically, an anteromedial femoral approach, inserting a guide pin from medial to lateral, opening the cortical bone with a femoral knife, solidifying the cancellous bone with a femoral trial mold knife seat, cutting out a bone tunnel of the same size as the patella, and drilling the bone tunnel along the guide pin with a hollow femoral drill; third step: tendon transplantation and fixation: specifically, introducing the quadriceps tendon with the patella from lateral to medial, and fixing it at the tibial end. Femoral end bone reinforcement fixation.

[0062] In some possible embodiments, the cross-sectional shape and size of the trial mold cutter head 91 are consistent with the shape and size of the first guide channel 141. The above settings can ensure that the size and shape of the tunnels of the patella and femur are consistent, thereby achieving patella-femur matching, improving morphological adaptability, avoiding uneven compression or bone fragment fracture, and thus achieving standardized and anatomically adapted material sampling of patellar bone fragments and tendons, fundamentally improving the reliability and stability of anterior cruciate ligament reconstruction.

[0063] The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

[0064] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0065] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A guide plate assembly for the patella, characterized in that, include: The patellar fixation plate (11) has a first receiving space (111) and a positioning connector (112), the positioning connector (112) being disposed on one side of the first receiving space (111); A positioning component capable of abutting and fixing to the patella, the positioning component being disposed on the side of the patellar fixation plate (11) away from the positioning connector (112), the positioning component being connected to the patellar fixation plate (11); The first guide (14) is disposed in the first receiving space (111) and is detachably connected to the patellar fixation plate (11); the first guide (14) has a first guide channel (141) which can accommodate the first bone chisel (3). The second guide (15) is detachably connected to the positioning connector (112) and has a second guide channel (151) that can accommodate the second bone chisel. The second guide channel (151) is located below the first guide channel (141), and the depth direction of the first guide channel (141) is perpendicular to the depth direction of the second guide channel (151). The first bone chisel (3) can move along the first guide channel (141) and the second bone chisel can move along the depth direction of the second guide channel (151) to remove the patella, so as to cut the patella with the same cross-sectional shape as the first guide channel (141).

2. The guide plate assembly for the patella according to claim 1, characterized in that, The positioning components include a first positioning component (12) and a second positioning component (13), which are disposed opposite to each other on both sides of the patellar fixation plate (11); The first positioning component (12) and the second positioning component (13) have the same structure. The first positioning component (12) includes a knob component (121) and a pin clamp component (122) that are connected to each other. The knob assembly (121) is connected to the patellar fixation plate (11), the clip assembly (122) is able to abut against the patella, and the knob assembly (121) is able to rotate relative to the patellar fixation plate (11) to drive the clip assembly (122) to move toward or away from the patella.

3. The guide plate assembly for the patella according to claim 1, characterized in that, The patellar fixation plate (11) includes a connecting part (113) and a mounting part (114), which are connected to each other to form a T-shaped structure.

4. The guide plate assembly for the patella according to claim 3, characterized in that, The knob assembly (121) of the first positioning component (12) and the knob assembly of the second positioning component (13) are disposed opposite to each other at both ends of the connecting part (113), and the pin clamping assembly (122) of the first positioning component (12) and the pin clamping assembly of the second positioning component (13) are disposed opposite to each other on both sides of the mounting part (114).

5. The guide plate assembly for the patella according to claim 3, characterized in that, The connecting portion (113) is provided with a protrusion (115), which is used to place the tendon connected to the patella.

6. The guide plate assembly for the patella according to any one of claims 1-5, characterized in that, The second guide (15) is provided with mounting holes that are compatible with the positioning connector (112); The mounting hole is fitted onto the positioning connector (112), and the positioning connector (112) abuts against the side of the patellar fixation plate (11) where the positioning connector (112) is located.

7. The guide plate assembly for the patella according to any one of claims 1-5, characterized in that, The depth direction of the first guide channel (141) is consistent with the thickness direction of the first guide member (14); The depth direction of the second guide channel (151) is consistent with the thickness direction of the second guide member (15).

8. The guide plate assembly for the patella according to any one of claims 1-5, characterized in that, The first guide channel (141) has a U-shaped structure.

9. A cutting device, characterized in that, Includes a depth-limiting drill bit (2), a first bone chisel (3), a second bone chisel, a longitudinal ligament separator (4), a transverse ligament separator (5), a tendon extractor (6), a femoral drill locator (7), a femoral knife (8), a femoral trial knife (9), and a guide plate assembly for the patella as described in any one of claims 1-8; The ligament longitudinal separator (4) is used to longitudinally cut the tendon; The ligament transverse separator (5) is used to transversely cut the tendon; The tendon extractor (6) is used to cut off the distal end of the tendon that has been cut by the longitudinal ligament separator (4) and the transverse ligament separator (5); The depth-limiting drill bit (2) drills a hole in the patella through the first guide channel (141); The first bone chisel (3) cuts the patella through the first guide channel (141); The second bone chisel cuts the patella through the second guide channel (151); The femoral cutter (8) is used to cut the femur where the tendon is to be installed; The femoral trial molding knife (9) includes a trial molding knife head (91), which is used to cut the femur after it has been cut by the femoral knife (8) to form a patella mounting hole. The patella mounting hole can be used to install the cut patella.

10. The cutting device according to claim 9, characterized in that, The cross-sectional shape and size of the test mold cutter head (91) are consistent with the shape and size of the first guide channel (141).

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