Squeezing nail for orthopedics department and assembly tool thereof

Abstract

The invention provides an extrusion nail for the orthopedics department and an assembly tool of the extrusion nail, which are applied to the technical field of orthopedic surgical instruments, the extrusion nail adopts an unthreaded structure, consists of a nail body, barbs and an extrusion groove, and can be matched with bone tunnels with different lengths through multiple nail heads and tails; the assembly tool comprises an execution end and an impact handle and can provide linear impact force to achieve linear implantation of the extrusion nail. Rotary screwing-in is replaced with linear propelling, and shearing and torsion damage of the ligament is fundamentally avoided; meanwhile, the device has the advantages of being accurate in implantation, convenient to operate and stable in fixation, the clinical requirements of orthopedic ligament reconstruction operations are met, and the operation safety and the postoperative healing quality are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of orthopedic surgical instruments, in particular to a compression nail for orthopedics and an assembly thereof. BACKGROUND

[0002] In the ligament reconstruction surgery of orthopedics, the fixation effect of the grafted ligament and the bone tunnel directly determines the healing quality after the operation, and the compression nail is the core instrument of the operation.

[0003] At present, the compression nails mainly used in the clinic are screw-shaped structures, which are fixed by being screwed in through rotation, but the thread of the screw-shaped compression nail is a spiral advancing structure, and when being screwed in, the thread will generate continuous shearing force and torsional force on the ligament in the bone tunnel. The ligament tissue is mainly composed of collagen fibers, which are fragile and poor in torsional resistance, and the spiral shearing force will directly cause the ligament fibers to break and be arranged in disorder, thereby damaging the mechanical integrity of the ligament; at the same time, the torsional force will pull the combined interface of the ligament and the bone tunnel, thereby affecting the healing adhesion of the ligament and the bone tissue after the operation.

[0004] At the same time, the thread groove of the screw-shaped compression nail will form a suction effect when being rotated, and the fibers at the edge of the ligament are easily sucked into the thread gap, thereby causing the ligament to be locally torn and damaged; if the depth of the sucked-in is deep, the ligament needs to be additionally stripped in the operation, thereby further expanding the damage range and prolonging the operation time.

[0005] Therefore, the application provides a compression nail for orthopedics and an assembly thereof to solve the above problems. SUMMARY

[0006] The application aims to solve the technical problem that the existing screw-shaped compression nail is easy to cause damage to the ligament during the screwing-in process, and provides a compression nail for orthopedics, which is suitable for being hit into the bone tunnel in a striking manner, the compression nail is composed of a nail body and barbs, the nail body comprises a cylindrical body, a conical frustum body and a conical guide head from bottom to top, a plurality of barbs are arranged in an array on the outer wall of the nail body, and a compression groove for pressing the ligament is arranged on the side of the nail body away from the barbs. A guide wire hole one for inserting a guide wire is further arranged in the nail body. A matching groove and a C-shaped groove are arranged on the side of the nail body away from the conical guide head, and the inner contour of the matching groove is matched with the outer contour of the conical guide head. The first and last groups of compression nails can be hit into the bone tunnel in sequence through the matching of the matching groove and the conical guide head.

[0007] Further, the compression groove comprises an equal-diameter groove arranged on the cylindrical body and a variable-diameter groove arranged on the conical frustum body and the conical guide head, the axis of the equal-diameter groove is equal in distance to the axis of the guide wire hole one, and the axes of the variable-diameter grooves gradually increase from bottom to top. The two groups of extrusion nails are matched by the matching grooves and the conical guide heads, the constant-diameter grooves and the variable-diameter grooves are matched to form extrusion bosses, and the ligaments in the bone tunnel are formed in a stepped extrusion.

[0008] Further, the two sides of the barb are symmetrically provided with guide side walls, the vertical spacing of the two groups of guide side walls gradually decreases in the direction close to the conical guide head, and the horizontal spacing of the two groups of guide side walls gradually decreases in the direction close to the guide wire hole axis; The bottoms of the two groups of guide side walls away from the conical guide head are provided with flat teeth.

[0009] Further, the spacing between the barb away from the extrusion groove and the barb close to the extrusion groove and the guide wire hole axis gradually decreases, which is used for avoiding the circumferential rotation of the extrusion nail when advancing.

[0010] Further, the inner wall of the extrusion groove is a smooth surface or a friction surface with blunt nail-shaped protrusions.

[0011] Further, the extrusion nail is a hollow structure or a solid structure, and the material of the extrusion nail is selected from at least one material of titanium-based ceramics, pure titanium, magnesium, tantalum and magnesium alloy.

[0012] The application also provides an assembly tool for the extrusion nail used in orthopedics, which is used for hitting the extrusion nail into the bone tunnel, and the assembly tool comprises an execution rod, one end of the execution rod is provided with an execution end head, the execution end head comprises a resisting protrusion matched with the matching groove, a C-shaped protrusion matched with the C-shaped groove, and a notch groove matched with the extrusion groove. The other end of the execution rod is provided with a limiting table and a hand holding seat, the hand holding seat is rotationally connected to the end of the execution rod, the limiting table is fixed to the middle of the execution rod, and an impact handle is slidingly connected between the limiting table and the hand holding seat, and a counterweight is arranged in the impact handle. The execution rod is also provided with a guide wire hole two matched with the guide wire hole one of the extrusion nail and used for inserting a guide wire.

[0013] Further, the side opposite to the limiting table of the impact handle is provided with a cross limiting groove, and a cross protrusion matched with the cross limiting groove is fixed on the impact handle.

[0014] Further, the impact handle is used for impacting the limiting table under an external force, the execution end head is resisted by inertia, and the extrusion nail is hit to advance in the bone tunnel on the knee joint; The barb is used for impacting a propulsion straight groove in the inner wall of the bone tunnel, the impact handle and the limiting table are matched, the execution rod and the execution end head are driven to rotate by holding the hand holding seat and rotating the impact handle, and then the barb is rotated in the circumferential direction relative to the propulsion straight groove, and bidirectional resistance limiting in the axis direction of the bone tunnel is formed.

[0015] Compared to existing technologies, the advantages of this application are: The extrusion pin of this invention uses a striking linear advancement method instead of a screw-like rotating insertion. The pin body has no thread structure, and no shearing or torsional force is generated during advancement, thus structurally eliminating the possibility of ligament fiber rupture or entanglement damage. With the guidance of the guide wire hole and the guide wire, the extrusion pin is ensured to advance precisely along the axis, avoiding eccentric compression damage to the ligament, and is suitable for the clinical needs of minimally invasive and precise surgery. It can achieve end-to-end alignment of multiple compression screws without the need for custom compression screws of different lengths, and can flexibly adapt to bone tunnels of different lengths; the alignment process is linear, reducing surgical operation steps, lowering the risk of repeated ligament disturbance, and reducing the cost of preparing surgical instruments. Attached Figure Description

[0016] Figure 1 This is a front structural diagram of the extrusion nail proposed in this application; Figure 2 This is a schematic diagram of the side structure of the extrusion nail proposed in this application; Figure 3 This is a schematic diagram of the bottom structure of the extrusion nail proposed in this application; Figure 4 This is a schematic diagram of the front structure of the barbs proposed in this application; Figure 5 for Figure 4 Enlarged structural diagram of section A in the middle; Figure 6 This is a schematic diagram of the bottom surface structure of the barbs proposed in this application; Figure 7 This is a schematic diagram of the bottom structure of the assembly proposed in this application; Figure 8 This is a front structural diagram of the assembly proposed in this application; Figure 9 for Figure 8 Enlarged structural diagram of section B in the middle; Figure 10 This is a schematic diagram showing the state of the assembly proposed in this application being used in conjunction with a single extrusion screw to penetrate the bone tunnel; Figure 11 This is a schematic diagram showing the state of the assembly proposed in this application working with multiple sets of extrusion screws to penetrate the bone tunnel; Figure 12 This is a schematic diagram showing the assembly fixture proposed in this application and multiple sets of extrusion pins in a sequential extrusion fit. Figure 13 for Figure 12 Enlarged structural diagram of section C; Figure 14The cross-sectional structure diagram of the assembly tool and the plurality of extrusion nails is sequentially extruded and matched in the application; Figure 15 The state diagram of the impact handle impacting the extrusion nail is shown in the application; Figure 16 The state diagram of the impact handle rotating the extrusion nail is shown in the application; Figure 17 The front and rear state diagrams of the barb rotating in the bone tunnel are shown in the application.

[0017] Explanation of figure numbers: 1, extrusion nail; 11, nail body; 111, cylindrical body; 112, conical frustum body; 113, conical guide head; 12, guide wire hole one; 13, barb; 131, guide side wall; 132, flat head tooth; 14, extrusion groove; 1401, extrusion boss; 141, variable-diameter groove; 142, constant-diameter groove; 15, C-shaped groove; 16, apposition groove; 2, assembly tool; 21, execution rod; 22, limiting table; 221, cross limiting groove; 23, impact handle; 231, cross protrusion; 24, hand holding seat; 25, execution end; 251, C-shaped protrusion; 252, abutting protrusion; 253, notch groove; 254, guide wire hole two; 3, knee joint; 301, bone tunnel; 302, straight pushing groove; 4, ligament; 5, guide steel wire. DETAILED DESCRIPTION

[0018] The embodiments will be described in conjunction with the drawings in the specification, and all other embodiments obtained by those skilled in the art based on the embodiments in the application without creative labor are within the scope of protection of the application.

[0019] Embodiments: The application provides an extrusion nail for orthopedics and an assembly tool thereof, please refer to Figure 1 - Figure 17 , which is suitable for being hit into a bone tunnel 301, and the core design is a threadless linear pushing structure, so as to eliminate rotation damage.

[0020] Specifically, please refer to Figure 1 - Figure 6, the extrusion nail 1 is composed of a nail body 11 and a barb 13, it is to be explained that in the embodiment, the material of the extrusion nail 1 is preferably tantalum metal, the nail body 11 comprises a cylinder 111, a frustum 112 and a conical guide head 113 from bottom to top, the conical guide head 113 is in smooth conical structure, can easily penetrate the soft tissue at the entrance of the bone tunnel 301, reduces the initial implantation resistance, avoids the ligament traction injury caused by rough implantation;The frustum 112 realizes smooth transition of diameter, avoids the jam during implantation, reduces the instantaneous impact on the ligament;The cylinder 111 guarantees the structural stability of the middle section of the extrusion nail 1, forms stable surface contact extrusion with the ligament 4, avoids excessive local pressure;The nail body 11 adopts smooth outer wall to cooperate with the barb 13 to realize fixation, avoids screw rotation injury.

[0021] A plurality of barbs 13 are uniformly arranged in an array along the axial direction of the nail body 11 on the outer wall of the nail body 11, the axial spacing between adjacent barbs 13 is 2-3mm, which is adapted to the trabecular bone density of the inner wall of the adult bone tunnel, avoids insufficient fixation force caused by excessive spacing, and damages the bone wall caused by small spacing.

[0022] Further, the two sides of the barb 13 are symmetrically provided with guide side walls 131, the included angle between the guide side wall 131 and the vertical symmetry axis of the nail body 11 is 15-20°, which can form effective guidance to avoid rotation, and will not increase the implantation resistance due to excessive angle;The vertical spacing of the two groups of guide side walls 131 gradually decreases in the direction close to the conical guide head 113, and the horizontal spacing gradually decreases in the direction close to the axis of the guide wire hole 12, forming a converging guide channel; The bottom between the two groups of guide side walls 131 away from the conical guide head 113 is provided with a flat tooth 132, the flat tooth 132 can avoid cutting bone tissue and ligament with sharp edge, and the width of the flat tooth 132 is consistent with the width of the bottom of the guide side wall 131, to ensure uniform stress during impact embedding.

[0023] Please refer to Figure 3 The side of the nail body 11 away from the barb 13 is provided with an extrusion groove 14 for pressing the ligament 4, the cross section of the extrusion groove 14 is in shallow arc shape. The extrusion groove 14 can be a smooth curved surface structure, which reduces the friction damage when contacting with the ligament, and the curvature radius of the curved surface is 3-5mm, which is adapted to the diameter of commonly used transplanted ligament, such as the diameter of 4-6mm of knee joint cross ligament. When the extrusion groove 14 is a friction surface with blunt nail-shaped protrusions, the protrusion height is 0.3-0.5mm, the protrusion is semispherical, and is uniformly arranged along the axial direction of the extrusion groove 14, which can increase the friction force with the ligament to prevent relative sliding, and will not pierce the ligament fibers.

[0024] The nail body 11 is provided with a guide wire hole 12 for inserting the guide wire 5; the guide wire hole 12 cooperates with the guide wire 5 to ensure that the extrusion nail 1 is pushed along a straight line throughout the process without rotating deviation.

[0025] Please refer to Figure 3 , the side of the nail body 11 away from the conical guide head 113 is provided with a matching groove 16 and a C-shaped groove 15; the matching groove 16 is a conical counterbore structure, the taper of the counterbore is consistent with the taper of the conical guide head 113, and a groove corresponding to the extrusion groove 14 on the conical guide head 113 is arranged in the matching groove 16; when matching, rotation is avoided, and the same direction of the extrusion grooves 14 on the two groups of nail bodies 11 is maintained, which not only ensures accurate matching, but also avoids the difficulty of matching caused by interference fit; the opening angle of the C-shaped groove 15 is 120°, the groove width is in transition fit with the width of the C-shaped protrusion 251 of the assembly tool 2, circumferential positioning is achieved, the impact force is ensured to be transmitted along the axial direction, and the assembly tool and the extrusion nail are convenient for quick disassembly and assembly; through the matching of the matching groove 16 and the conical guide head 113, a plurality of extrusion nails 1 can be implanted into the bone tunnel 301 in a head-to-tail matching manner without rotating and adjusting the position.

[0026] An assembly tool 2 suitable for the above extrusion nail 1 provides straight-line impact force for the extrusion nail 1, and replaces the rotating screwing-in force of the screw-shaped extrusion nail.

[0027] Specifically, please refer to Figure 7 - Figure 17 , the assembly tool 2 includes an execution rod 21, one end of the execution rod 21 is provided with an execution end 25, the execution end 25 includes a resisting protrusion 252 matched with the matching groove 16, a C-shaped protrusion 251 matched with the C-shaped groove 15, and a gap groove 253 matched with the extrusion groove 14; the execution end 25 is matched with the multiple structures of the extrusion nail 1, so that the impact force is uniformly transmitted along the axial direction, and the extrusion nail 1 is prevented from being deviated by force.

[0028] The other end of the execution rod 21 is provided with a limiting table 22 and a hand holding seat 24; the hand holding seat 24 is rotationally connected to the end of the execution rod 21, and a built-in counterweight impact handle 23 is slidingly connected between the limiting table 22 and the hand holding seat 24; the impact handle 23 generates straight-line thrust through sliding impact, replaces the rotating torque, and completely avoids ligament twist injury.

[0029] The execution rod 21 is provided with a guide wire hole 254 matched with the guide wire hole 12; the guide wire hole 12 and the guide wire hole 254 are coaxially matched to form double guidance, so as to ensure that the extrusion nail 1 is pushed along a straight line throughout the process.

[0030] The limiting table 22 is provided with a cross limiting groove 221, and the impact handle 23 is provided with a matching cross protrusion 231; this structure is only used when the implanted reverse barb is rotated, and the rotating action is independent of the pushing process, so as to avoid ligament injury caused by synchronization of pushing and rotating.

[0031] The present application avoids shearing and torsional injury of ligament by step-by-step operation of guiding positioning, hitting implantation, multiple nail butt joint and rotation limiting, During the operation, a bone tunnel 301 is drilled on the knee joint 3 in advance, then the ligament 4 and the guide wire 5 are sequentially inserted, and the two ends of the ligament 4 are fixed on the outer wall of the knee joint 3. At this time, the extrusion nail 1 with guide wire hole one 12 and the assembly tool 2 with guide wire hole two 254 are sequentially inserted on the guide wire 5 to ensure that they are coaxial. Then the abutting protrusion 252 of the execution end 25 is embedded into the butt joint groove 16, the C-shaped protrusion 251 is clamped into the C-shaped groove 15, and then the gap groove 253 is aligned with the extrusion groove 14.

[0032] At this time, the hand-held seat 24 of the hand-held assembly tool 2 is used to align the tapered guide head 113 of the extrusion nail 1 with the entrance of the bone tunnel 301, and the ligament 4 in the bone tunnel 301 is covered in the extrusion groove 14. The impact handle 23 is reciprocally slid along the execution rod 21 to impact the limiting table 22 by the inertia of the counterweight, so that the execution end 25 transmits axial linear thrust to the extrusion nail 1 to push the extrusion nail 1 to move forward at a constant speed along the guide wire 5. During the whole pushing process, the extrusion nail 1 has no rotation, the smooth outer wall of the nail body 11 only has surface contact extrusion with the ligament 4, and there is no shearing force. The guide side wall 131 of the barb 13 guides the stable implantation of the extrusion nail 1 to avoid deviation and compression of the ligament 4. The flat tooth 132 is only embedded into the bone wall under the impact to form temporary fixation, and has no rotation cutting action.

[0033] When secondary fixation is needed, after the first extrusion nail 1 is implanted to the predetermined depth, the guide wire hole one 12 of the second extrusion nail 1 is directly inserted into the guide wire 5, so that the butt joint groove 16 of the second extrusion nail 1 is aligned with the tapered guide head 113 of the first extrusion nail 1. The impact operation is repeated to make the two extrusion nails 1 butt joint to form a whole. The design can flexibly increase or decrease the number of extrusion nails according to the length of the bone tunnel 301, without the need to customize instruments of different lengths. The butt joint process is linear pushing without rotation adjustment, which avoids disturbance and damage to the ligament 4 in the secondary operation.

[0034] After all the extrusion nails 1 are implanted, the rotation limiting operation is performed. The hand-held seat 24 is kept fixed, the impact handle 23 is rotated, the execution rod 21 and the extrusion nail 1 are synchronously rotated through the cooperation of the cross-shaped block 231 and the cross-shaped limiting groove 221, and the barb 13 rotates in the straight groove 302 on the inner wall of the bone tunnel 301 to make the flat tooth 132 of the barb 13 form bidirectional abutment with the bone wall. Since the rotation action is performed after the extrusion nail 1 is completely implanted, the extrusion nail 1 and the ligament 4 have formed stable surface contact extrusion, the rotation angle is small, usually not more than the width of the barb 13, and no obvious shearing force is generated on the ligament 4, which is completely different from the damage mode of the rotation pushing of the screw-shaped extrusion nail.

[0035] More specifically, please refer to Figure 17The fixed core of the application is a composite fixing mechanism of "impact implantation + micro-rotation bidirectional interference", and the pushing straight groove 302 is only a temporary guide channel before rotation and is converted into a fixed limiting structure after rotation. Impact stage: when the temporary fixed extrusion nail 1 is implanted by impact, the guide side wall 131 of the barb 13 will impact the pushing straight groove 302 formed on the inner wall of the bone tunnel. The pushing straight groove 302 has the following functions: ① guiding the extrusion nail 1 to advance in a straight line to avoid circular rotation during implantation; ② the flat tooth 132 of the barb 13 is embedded in the side wall of the pushing straight groove 302 to form initial axial positioning and prevent the extrusion nail 1 from rebounding during implantation. At this time, the pushing straight groove 302 is a "one-way guide structure", but it is not the core of the final fixation.

[0036] Rotation stage: the pushing straight groove 302 is converted into a bidirectional limiting groove. After all the extrusion nails 1 are implanted, the extrusion nail 1 is rotated (rotation angle ≤ barb width) through the assembly with 2, and the barb 13 is circumferentially offset relative to the pushing straight groove 302. The one-side guide side wall 131 of the barb 13 tightly interferes with the one-side wall of the pushing straight groove 302 to form a "forward direction" limiting; The flat tooth 132 of the barb is embedded in the other side wall of the pushing straight groove 302 to form a "reverse direction" interference; Finally, a "bidirectional jamming" limiting structure is formed. At this time, the pushing straight groove 302 is no longer a "through guide channel", but a "sawtooth fixed groove" that engages with the barb 13. The path of the extrusion nail 1 along the pushing straight groove 302 is completely blocked, which can effectively prevent the extrusion nail 1 from retracting and improve the stability of the installation.

[0037] After a plurality of extrusion nails 1 are engaged, the equal-diameter groove 142 cooperates with the variable-diameter groove 141 to form a continuous extrusion boss 1401, which uniformly extrudes the ligament 4 in the bone tunnel 301 in a stepped manner. This extrusion method disperses the stress of the ligament to multiple contact points of the boss, avoiding local stress concentration; at the same time, the extrusion boss 1401 is a smooth curved surface, which is in surface contact with the ligament 4 without cutting risk, further protecting the integrity of the ligament fibers.

[0038] The extrusion nail 1 of the application adopts a straight-line pushing impact instead of a screw-like rotation and screwing, and the nail body 11 has no thread structure, so that no shear force and torsional force are generated during pushing, which structurally eliminates the possibility of ligament fiber rupture and winding damage; in cooperation with the guidance of the guide wire hole 12 and the guide steel wire 5, the extrusion nail 1 is accurately pushed along the axis to avoid eccentric extrusion damage to the ligament, which meets the clinical requirements of minimally invasive and precise surgery. The plurality of extrusion nails 1 can be folded head to tail, without the need to customize extrusion nails 1 of different lengths, and can be flexibly adapted to bone tunnels 301 of different lengths; the folding process is linear advancement, reducing the operation steps, reducing the risk of repeatedly disturbing the ligament 4, and reducing the cost of surgical instrument preparation.

[0039] The above is only the best embodiment adopted by the present application in combination with the current actual demand, but the protection scope of the present application is not limited thereto.

Claims

1. An orthopedic compression screw (1) suitable for impact-type implantation into a bone tunnel (301), characterized in that, The compression nail (1) is composed of a nail body (11) and barbs (13). The nail body (11) includes a cylinder (111), a frustum (112) and a conical guide head (113) from bottom to top. A number of barbs (13) are arranged in an array on the outer wall of the nail body (11). The side of the nail body (11) away from the barbs (13) is provided with a compression groove (14) for compressing the ligament (4). The nail body (11) is also provided with a guide wire hole (12) for inserting the guide wire (5). The nail body (11) is provided with a mating groove (16) and a C-shaped groove (15) on the side away from the conical guide head (113), and the inner contour of the mating groove (16) matches the outer contour of the conical guide head (113). The bone tunnel (301) can be used to sequentially implant multiple sets of compression nails (1) by engaging the mating groove (16) and the conical guide head (113).

2. The orthopedic compression screw according to claim 1, characterized in that, The extrusion groove (14) includes an equal-diameter groove (142) disposed on the cylinder (111) and a variable-diameter groove (141) disposed on the frustum (112) and the conical guide head (113). The axis of the equal-diameter groove (142) is spaced from the axis of the guide wire hole (12), and the axis of the variable-diameter groove (141) gradually increases from bottom to top with respect to the axis of the guide wire hole (12). After the two sets of extrusion nails (1) are engaged with the conical guide head (113) through the mating groove (16), the equal diameter groove (142) and the variable diameter groove (141) cooperate to form an extrusion boss (1401), which forms a stepped extrusion for the ligament (4) in the bone tunnel (301).

3. The orthopedic compression screw according to claim 2, characterized in that, The barb (13) is provided with symmetrical guide sidewalls (131) on both sides. The vertical distance between the two sets of guide sidewalls (131) gradually decreases along the direction close to the conical guide head (113), and the horizontal distance between the two sets of guide sidewalls (131) gradually decreases along the direction close to the axis of the guide wire hole (12). Flat-headed teeth (132) are provided between the two sets of guide sidewalls (131) away from the bottom of the conical guide head (113).

4. The orthopedic compression screw according to claim 3, characterized in that, From the barb (13) furthest from the extrusion groove (14) to the barb (13) closest to the extrusion groove (14), the distance between the barb (13) and the axis of the guide wire hole (12) gradually decreases to prevent the extrusion nail (1) from rotating circumferentially during the impact.

5. The orthopedic compression screw according to claim 4, characterized in that, The inner wall of the extrusion groove (14) is a smooth surface or a friction surface with blunt nail-shaped protrusions.

6. The orthopedic compression screw according to claim 5, characterized in that, The extrusion nail (1) is a hollow or solid structure, and the material of the extrusion nail (1) is selected from at least one of titanium-based ceramics, pure titanium, magnesium, tantalum and magnesium alloys.

7. An assembly for an orthopedic compression screw, applicable to the orthopedic compression screw of claim 6, wherein the assembly (2) is used to force the compression screw (1) into a bone tunnel (301), characterized in that, The assembly (2) includes an actuating rod (21), one end of which is provided with an actuating end (25). The actuating end (25) includes an abutting protrusion (252) that engages with the mating groove (16), a C-shaped protrusion (251) that engages with the C-shaped groove (15), and a notch (253) that engages with the extrusion groove (14). The other end of the actuator (21) is provided with a limiting platform (22) and a handheld base (24). The handheld base (24) is rotatably connected to the end of the actuator (21). The limiting platform (22) is fixed to the middle of the actuator (21). An impact handle (23) is slidably connected between the limiting platform (22) and the handheld base (24) of the actuator (21). The impact handle (23) has a built-in counterweight. The actuator (21) is also provided with a second guide wire hole (254) that is adapted to the first guide wire hole (12) of the extrusion nail (1) and is used to insert the guide wire (5).

8. The assembly for an orthopedic compression screw according to claim 7, characterized in that, The limiting platform (22) is provided with a cross limiting groove (221) on the side opposite to the impact handle (23), and a cross protrusion (231) that matches the cross limiting groove (221) is fixed on the impact handle (23).

9. The assembly for an orthopedic compression screw according to claim 8, characterized in that, The impact handle (23) is used to impact the limiting platform (22) under external force, and use inertia to make the actuator (25) abut against the extrusion pin (1) and strike the extrusion pin (1) to advance in the bone tunnel (301) on the knee joint (3); The barb (13) is used to impact the inner wall of the bone tunnel (301) to create a straight groove (302). After the impact handle (23) is engaged with the limiting platform (22), the actuator (21) and the actuator end (25) are rotated by holding the hand seat (24) and rotating the impact handle (23), thereby causing the barb (13) to rotate circumferentially relative to the straight groove (302), forming a bidirectional contact limiting in the axial direction of the bone tunnel (301).

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