Cemented hip bone channel repair screw

Abstract

The application relates to the technical field of medical devices, and discloses a bone cement pelvis bone channel repair screw, which comprises a screw, a rectangular insertion slot is arranged at the top center of the screw, an up-down penetrating inner groove one is arranged at the center of the lower surface in the rectangular insertion slot, a plurality of penetrating through grooves are arranged at the upper middle and lower parts in the inner groove one, a sleeve rod is inserted into the inner groove one, and the top end of the sleeve rod penetrates the top of the screw; the rectangular insertion block is inserted into the rectangular insertion slot, the sleeve can drive the screw to rotate by rotating the sleeve, the through groove is corresponded to the place where the bone cement needs to be punched in the pelvis by rotating the screw, the sleeve drives the sleeve rod to be inserted into the inner groove one in the screw, and the sleeve rod can move in the inner groove one after being inserted, so that the through hole and the place where the bone cement needs to be punched in the pelvis corresponding to the through groove are more accurately corresponded.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to bone cement pelvic bone channel repair screws. Background Technology

[0002] The pelvis is composed of the sacrum and two lateral medullary bones, shaped like a basin, hence the name pelvis. It is divided into the upper greater pelvis and the lower lesser pelvis. The pelvis is a basin-shaped skeleton connecting the spine and lower limbs, a complete bony ring formed by the sacrum and coccyx (the two lowest bones of the spine) at the back and the two hip bones on the left and right. When inserting pelvic screws for pelvic canal repair, blind insertion is required. Due to the minimally invasive small incision, there is bone damage in the pelvic screw placement channel, necessitating the injection of bone cement. Therefore, a bone cement pelvic canal repair screw is needed.

[0003] A search revealed an existing patent (publication number: CN208756131U) that discloses a bone cement pedicle screw. This invention's bone cement pedicle screw features three side holes on its threaded front section and three marking lines on its rear end face. The positions of these marking lines correspond to the projection positions of the three side holes on the rear end face of the pedicle screw. The front section of the bone cement pusher sleeve has an opening groove corresponding to the side holes of the pedicle screw, and the rear end has an operating handle. By cooperating with the marking lines on the rear end face of the pedicle screw, the opening groove is aligned with the bone cement hole on the pedicle screw. The bone cement is then pushed into the vertebral body through the bone cement hole using the bone cement pusher, precisely controlling the direction of bone cement flow and improving surgical treatment outcomes. The inventors discovered the following problems with the existing technology during the development of this invention:

[0004] The existing screws are prone to deviation during rotation. When cement is injected, rotating the screw makes the screw hole and the cement filling position on the same plane. However, the screw hole is not necessarily facing the bone repair site. If the screw is rotated to align the hole with the bone repair site, the screw will move up and down, causing the hole and the bone repair site to be out of plane. Therefore, precise repair cannot be achieved. Summary of the Invention

[0005] The main technical problem solved by this invention is to provide a bone cement pelvic bone channel repair screw, which can solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, more specifically, a bone cement pelvic bone channel repair screw, comprising a screw, wherein a rectangular slot is formed at the center of the top of the screw, and an inner groove is formed at the center of the lower surface of the inner surface of the rectangular slot. Multiple evenly distributed through slots are formed at the top, middle, and bottom of the inner groove. A sleeve is inserted into the inner groove, and the top end of the sleeve penetrates the top of the screw. Two through holes are formed at the top, middle, and bottom of the right side of the sleeve. A rectangular insert is provided at the top of the sleeve, and a sleeve is fixedly connected to the top of the rectangular insert. An inner through hole is formed at the center of the rectangular insert, and the top end of the sleeve is inserted into the inner groove. The socket is connected to the sleeve. A snap-fit ​​assembly is provided between the socket and the outer surface of the sleeve rod located inside the socket. The top of the sleeve rod is installed in the socket through the snap-fit ​​assembly. An external push rod passes through the sleeve and is slidably connected to it. The bottom end of the external push rod is inserted into the sleeve rod. An inner groove is formed at the center of the outer push rod, and the upper surface of the inner groove is connected to the outside. A through slot is formed on the lower right side of the inner groove. Three evenly distributed marking lines are provided above the front surface of the outer push rod. An inner core push rod is slidably connected inside the inner groove, and the top end of the inner core push rod passes through the top end of the outer push rod.

[0007] Furthermore, the snap-fit ​​assembly includes mounting grooves located at the center of the left and right sides inside the socket. A snap-fit ​​plate is rotatably connected above the front and rear surfaces of the mounting groove via a rotating rod. A continuous snap-fit ​​groove is formed above the outer surface of the sleeve rod inside the socket, and the side of the snap-fit ​​plate near the center of the socket snaps into the snap-fit ​​groove. A guide groove is formed at the center of the side of the mounting groove away from the center of the socket, and a guide block is slidably connected inside the guide groove. A guide rod is fixedly connected at the center of the side of the guide block near the center of the socket, and a limit block is fixedly connected at the end of the guide rod near the center of the socket. A limit groove is formed at the center of the side of the snap-fit ​​plate away from the center of the socket, and the limit block is inserted into the limit groove and movably connected to the limit groove. A spring is fixedly connected between the side of the snap-fit ​​plate away from the center of the socket and the side of the mounting groove away from the center of the socket, and the spring is sleeved on the outer surface of the guide rod inside the mounting groove.

[0008] Furthermore, the upper and lower sections of the card plate on the side near the center of the insertion hole are both designed as inclined inlet and outlet sections, which are adapted to the upper and lower sections of the inner sidewall of the card slot.

[0009] Furthermore, the middle section of the card plate near the center of the insertion hole is provided as an arc-shaped snap-fit ​​section, which is adapted to the middle section of the inner sidewall of the card slot.

[0010] Furthermore, the inner wall of the limiting groove and the side of the limiting block near the center of the insertion hole are both set in an arc shape.

[0011] Furthermore, the top and bottom of the card plate are both designed in an arc shape.

[0012] Furthermore, the rectangular insert is adapted to the rectangular slot.

[0013] The beneficial effects of the bone cement pelvic bone channel repair screw of the present invention are as follows:

[0014] A rectangular insert is inserted into a rectangular slot, allowing the screw to rotate by turning the sleeve. The screw is then rotated until the groove aligns with the area inside the pelvis where bone cement needs to be injected. After alignment, the sleeve is separated from the screw, and the rectangular insert at the bottom of the sleeve is installed using a locking assembly. The sleeve then drives the sleeve rod to insert into the inner groove of the screw. After insertion, the sleeve rod can move within the inner groove, allowing the through-hole on its side to be adjusted to align with the area where bone cement needs to be injected. This ensures a more precise alignment between the through-hole and the desired bone cement injection point inside the pelvis. Because the sleeve rod can move freely within the inner groove, the position of the through-hole can be easily adjusted for more accurate bone cement injection, without requiring screw rotation for precision. Alignment helps prevent misalignment of the through holes. Then, maintaining the correct position of the sleeve, the outer sleeve is inserted through the sleeve and into the sleeve. During insertion, the marking lines are aligned with the top of the sleeve to ensure the slots on the side of the outer sleeve correspond to the through holes where bone cement needs to be injected. Specifically, the marking lines above the outer push rod correspond to the through holes on the lower side of the sleeve, the middle marking line to the middle through hole, and the lower marking line to the upper through hole. This facilitates accurate placement of the bone cement and prevents inaccurate injection. Next, the inner core push rod is inserted into the inner groove of the outer push rod, compressing the bone cement and forcing it out through the groove, through the through holes and grooves, and into the desired location within the pelvis. This allows for precise control of the bone cement flow direction and improves surgical outcomes. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is a three-dimensional structural diagram of the bone cement pelvic bone channel repair screw of the present invention;

[0017] Figure 2This is a schematic diagram of the front section of the bone cement pelvic bone channel repair screw of the present invention;

[0018] Figure 3 The bone cement pelvic bone channel repair screw of the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 The bone cement pelvic bone channel repair screw of the present invention Figure 2 Enlarged structural diagram at point B;

[0020] Figure 5 The bone cement pelvic bone channel repair screw of the present invention Figure 2 Enlarged structural diagram at point C;

[0021] Figure 6 This is a three-dimensional enlarged schematic diagram of the screw structure of the bone cement pelvic bone channel repair screw of the present invention;

[0022] Figure 7 This is a three-dimensional enlarged structural diagram of the sleeve of the bone cement pelvic bone channel repair screw of the present invention.

[0023] In the diagram: 1. Screw; 2. Sleeve rod; 3. Sleeve; 4. External push rod; 5. Internal core push rod; 6. Inner groove one; 7. Rectangular insert block; 8. Insertion hole; 9. Snap-fit ​​assembly; 901. Snap-fit ​​groove; 902. Snap-fit ​​plate; 903. Limit groove; 904. Limit block; 905. Guide rod; 906. Guide groove; 907. Guide block; 908. Spring; 909. Mounting groove; 910. Rotating rod; 10. Rectangular slot; 11. Through groove; 12. Through hole; 13. Slot; 14. Inner groove two; 15. Marking line. Detailed Implementation

[0024] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0025] like Figure 1-7As shown, according to one aspect of the present invention, a bone cement pelvic bone channel repair screw is provided, comprising a screw 1, a rectangular slot 10 formed at the center of the top of the screw 1, an inner groove 6 formed at the center of the lower surface of the inner surface of the rectangular slot 10, and multiple evenly distributed through slots 11 formed at the top, middle and bottom of the inner groove 6, a sleeve 2 inserted into the inner groove 6, the top end of the sleeve 2 penetrating the top of the screw 1, two through holes 12 formed at the top, middle and bottom of the right side of the sleeve 2, a rectangular insert 7 provided at the top of the sleeve 2, a sleeve 3 fixedly connected to the top of the rectangular insert 7, an inner hole 8 formed at the center of the rectangular insert 7, and the top end of the sleeve 2 inserted into the inner hole 8 and connected to the inner surface of the sleeve 3. The parts are connected. A snap-fit ​​component 9 is provided between the inside of the insertion hole 8 and the upper surface of the sleeve 2 located inside the insertion hole 8. The top of the sleeve 2 is installed in the insertion hole 8 through the snap-fit ​​component 9. An external push rod 4 passes through the inside of the sleeve 3 and is slidably connected to the external push rod 4. The bottom end of the external push rod 4 is inserted into the inside of the sleeve 2. An inner groove 14 is opened in the center of the inside of the external push rod 4, and the upper surface of the inner groove 14 is connected to the outside. A left-right through slot 13 is opened in the lower right side of the inner groove 14. Three evenly distributed marking lines 15 are set above the front surface of the external push rod 4. An inner core push rod 5 is slidably connected inside the inner groove 14, and the top end of the inner core push rod 5 passes through the top end of the external push rod 4. When working, first rotate the screw 1 to drive it in as needed. In the pelvic bone undergoing repair, when screw 1 is inserted, a rectangular insert 7 is inserted into the rectangular slot 10, allowing the screw 1 to rotate by rotating the sleeve 3. Then, screw 1 is rotated so that the through groove 11 aligns with the area inside the pelvis where bone cement needs to be injected. After screw 1 is aligned, the sleeve 3 is separated from screw 1, and the rectangular insert 7 at the bottom of the sleeve 3 is installed with the sleeve rod 2 via the snap-fit ​​assembly 9. Next, the sleeve 3 drives the sleeve rod 2 to insert into the inner groove 6 inside screw 1. After insertion, the sleeve rod 2 can move within the inner groove 6, allowing the through hole 12 on the side of the sleeve rod 2 to be adjusted to the area corresponding to the through groove 11 where bone cement needs to be injected, thus aligning the through hole 12 with the area inside the pelvis where bone cement needs to be injected. The alignment is more precise because the sleeve 2 can move freely inside the inner groove 6, making it easier to adjust the position of the through hole 12 so that the bone cement can be injected more accurately. This eliminates the need to rotate the screw 1 for precise alignment and avoids deviations in the alignment of the through hole 12. Then, maintaining the position of the sleeve 2, the outer sleeve 2 is inserted through the sleeve 3 into the sleeve 2. During insertion, the marking line 15 aligns with the top of the sleeve 3, ensuring that the slot 13 on the side of the outer sleeve 2 corresponds to the through hole 12 where bone cement needs to be injected. Specifically, the marking line 15 above the outer push rod 4 corresponds to the lower through hole 12 on the side of the sleeve 2, the middle marking line 15 corresponds to the middle through hole 12, and the lower marking line 15 corresponds to the upper through hole 12.This facilitates accurate placement of the bone cement and prevents inaccurate injection. Next, the inner core pusher 5 is inserted into the inner groove 14 inside the outer pusher 4, compressing the bone cement and causing it to exit through the slot 13, pass through the through hole 12 and through the through groove 11, and be injected into the desired location within the pelvic bone. This allows for precise control of the bone cement flow direction and improves surgical outcomes.

[0026] In this embodiment, the snap-fit ​​assembly 9 includes mounting grooves 909 located at the center of the left and right sides inside the socket 8. A snap-fit ​​plate 902 is rotatably connected above the front and rear surfaces of the mounting groove 909 via a rotating rod 910. A continuous snap-fit ​​groove 901 is formed above the outer surface of the sleeve rod 2 inside the socket 8, and the side of the snap-fit ​​plate 902 closest to the center of the socket 8 snaps into the snap-fit ​​groove 901. A guide groove 906 is formed at the center of the side of the mounting groove 909 furthest from the center of the socket 8. A guide block 907 is slidably connected inside the guide groove 906. A guide rod 905 is fixedly connected to the center of the side of block 907 near the center of the socket 8. A limit block 904 is fixedly connected to one end of the guide rod 905 near the center of the socket 8. A limit groove 903 is formed at the center of the side of the clamping plate 902 away from the center of the socket 8. The limit block 904 is inserted into the limit groove 903 and is movably connected to the limit groove 903. A spring 908 is fixedly connected between the side of the clamping plate 902 away from the center of the socket 8 and the side of the mounting groove 909 away from the center of the socket 8. The spring 908 is sleeved on the guide rod. The outer surface of 905 is located inside the mounting groove 909. During operation, when the snap-fit ​​assembly 9 is used, the top end of the sleeve rod 2 is first inserted into the insertion hole 8, pressing the snap-fit ​​plate 902. The snap-fit ​​plate 902 is pressed downwards at an angle on the side closest to the center of the insertion hole 8. After being pressed, the snap-fit ​​plate 902 rotates into the mounting groove 909 via the rotating rod 910. The rotation of the snap-fit ​​plate 902 is limited by the movable connection between the limiting block 904 and the limiting groove 903, pressing the limiting block 904 and causing the limiting block 904 to connect with the guide rod 905 and the guide block 903. The 7 and guide groove 906 slide together and move under the limit, so that the clamping plate 902 can be squeezed and rotated stably. Then, after the clamping plate 902 rotates, it squeezes the spring 908, so that the spring 908 has a rebound force. When the top of the sleeve rod 2 is fully inserted into the insertion hole 8, the clamping plate 902 corresponds to the clamping groove 901. Then, the rebound force of the spring 908 can make the clamping plate 902 rotate and clamp into the clamping groove 901 to clamp and install the top of the sleeve rod 2. This allows the top of the sleeve rod 2 to be installed between the rectangular insertion block 7, so that the sleeve rod 2 can be operated through the sleeve 3.

[0027] In this embodiment, the upper and lower sections of the card plate 902 on the side near the center of the insertion hole 8 are both set as inclined inlet and outlet sections, and are adapted to the upper and lower sections of the inner sidewall of the card slot 901. During operation, it is convenient for the card plate 902 to engage and disengage from the card slot 901.

[0028] In this embodiment, the middle section of the card plate 902 near the center of the insertion hole 8 is provided as an arc-shaped snap-fit ​​section, which is adapted to the middle section of the inner sidewall of the card slot 901. During operation, it is convenient for the card plate 902 to snap into and detach from the card slot 901.

[0029] In this embodiment, the inner sidewall of the limiting groove 903 and the side of the limiting block 904 near the center of the insertion hole 8 are both set in an arc shape, which facilitates the movement of the limiting block 904 inside the limiting groove 903 after it is squeezed during operation.

[0030] In this embodiment, the top and bottom of the card plate 902 are both arc-shaped, which facilitates the card plate 902 to rotate inside the mounting groove 909 by the rotating rod 910 after being squeezed during operation.

[0031] In this embodiment, the rectangular insert 7 is adapted to the rectangular slot 10. During operation, the rectangular insert 7 can be inserted into the rectangular slot 10 so that the sleeve 3 rotates the screw 1.

[0032] The working principle of this device is as follows: First, screw 1 is driven into the pelvic bone requiring repair. During screw 1 insertion, a rectangular insert 7 is inserted into the rectangular slot 10, allowing the screw 1 to rotate by rotating the sleeve 3. Then, screw 1 is rotated until the through groove 11 aligns with the area inside the pelvic bone where bone cement needs to be injected. After screw 1 is aligned, the sleeve 3 is separated from screw 1, and the rectangular insert 7 at the bottom of the sleeve 3 is installed with the sleeve rod 2 via the snap-fit ​​assembly 9. Next, the sleeve 3 drives the sleeve rod 2 to insert into the inner groove 6 inside screw 1. After insertion, the sleeve rod 2 can move within the inner groove 6, allowing the through hole 12 on its side to be adjusted to correspond with the area inside the through groove 11 where bone cement needs to be injected. This ensures a more precise alignment between the through hole 12 and the area inside the pelvic bone where bone cement needs to be injected. Because the sleeve rod 2 can move freely within the inner groove 6, the position of the through hole 12 can be easily adjusted to ensure the correct placement of the bone cement. More accurate, and without the need to rotate screw 1 to achieve precise alignment, it also avoids deviation when the through hole 12 is aligned. Then, keeping the position of the sleeve 2 inconvenient, the outer sleeve 2 is inserted into the sleeve 3 through the sleeve 2. When inserted, the groove 13 on the side of the outer sleeve 2 is aligned with the through hole 12 where bone cement needs to be injected by the correspondence of the marking line 15 with the top of the sleeve 3. At the same time, the marking line 15 above the outer push rod 4 corresponds to the through hole 12 below the side of the sleeve 2, the marking line 15 in the middle corresponds to the through hole 12 in the middle, and the marking line 15 below corresponds to the through hole 12 above. This makes it easier to find the position of bone cement injection and avoids inaccurate bone cement injection. Then, the inner core push rod 5 is inserted into the inner groove 14 inside the outer push rod 4 to squeeze the bone cement, so that the bone cement comes out from the groove 13 and is injected into the pelvic bone where it needs to be injected through the through hole 12 and the through groove 11. This allows for precise control of the bone cement injection direction and can improve the surgical treatment effect.

[0033] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. A bone cement pelvic bone channel repair screw, comprising a screw (1), characterized in that: A rectangular slot (10) is provided at the center of the top of the screw (1). A through-hole (6) is provided at the center of the lower surface of the rectangular slot (10). Multiple evenly distributed through-holes (11) are provided at the top, middle and bottom of the through-hole (6). A sleeve (2) is inserted into the inside of the through-hole (6), and the top of the sleeve (2) penetrates the top of the screw (1). Two through-holes (12) are provided at the top, middle and bottom of the right side of the sleeve (2). A rectangular insert (7) is provided at the top of the sleeve (2). A sleeve (3) is fixedly connected to the top of the rectangular insert (7). A through-hole (8) is provided at the center of the inside of the rectangular insert (7), and the top of the sleeve (2) is inserted into the through-hole (8) and communicates with the inside of the sleeve (3). A snap-fit ​​assembly (9) is provided between the sleeve rod (2) and the socket (8) located on the outer surface of the sleeve rod (2). The top end of the sleeve rod (2) is installed in the socket (8) through the snap-fit ​​assembly (9). An external push rod (4) is passed through the sleeve (3) and is slidably connected to the external push rod (4). The bottom end of the external push rod (4) is inserted into the sleeve rod (2). An inner groove (14) is provided at the center of the inner groove (4). The upper surface of the inner groove (14) is connected to the outside. A through slot (13) is provided on the lower right side of the inner groove (14). Three evenly distributed marking lines (15) are provided above the front surface of the external push rod (4). An inner core push rod (5) is slidably connected inside the inner groove (14). The top end of the inner core push rod (5) passes through the top end of the external push rod (4).

2. The bone cement pelvic bone channel repair screw according to claim 1, characterized in that: The snap-fit ​​assembly (9) includes mounting grooves (909) located at the center of the left and right sides inside the socket (8). A locking plate (902) is rotatably connected above the front and rear surfaces of the mounting groove (909) via a rotating rod (910). A continuous groove (901) is formed above the outer surface of the sleeve rod (2) inside the socket (8). The side of the locking plate (902) near the center of the socket (8) is snapped into the groove (901). A guide groove (906) is provided at the center of the side of the mounting groove (909) away from the center of the socket (8). A guide block (907) is slidably connected inside the guide groove (906). The guide block (907) is located near the center of the socket (8). A guide rod (905) is fixedly connected to the center of one side of the core. A limiting block (904) is fixedly connected to one end of the guide rod (905) near the center of the inside of the insertion hole (8). A limiting groove (903) is opened at the center of the side of the card plate (902) away from the center of the inside of the insertion hole (8). The limiting block (904) is inserted into the limiting groove (903) and is movably connected to the limiting groove (903). A spring (908) is fixedly connected between the side of the card plate (902) away from the center of the inside of the insertion hole (8) and the side of the mounting groove (909) away from the center of the inside of the insertion hole (8). The spring (908) is sleeved on the outer surface of the guide rod (905) and located inside the mounting groove (909).

3. The bone cement pelvic bone channel repair screw according to claim 2, characterized in that: The upper and lower sections of the card plate (902) on the side near the center of the insertion hole (8) are both set as inclined inlet and outlet sections, and are adapted to the upper and lower sections of the inner sidewall of the card slot (901).

4. The bone cement pelvic bone channel repair screw according to claim 2, characterized in that: The middle section of the card plate (902) near the center of the insertion hole (8) is provided as an arc-shaped snap-fit ​​section, which is adapted to the middle section of the inner sidewall of the card slot (901).

5. The bone cement pelvic bone channel repair screw according to claim 2, characterized in that: The inner wall of the limiting groove (903) and the side of the limiting block (904) near the center of the insertion hole (8) are both set in an arc shape.

6. The bone cement pelvic bone channel repair screw according to claim 2, characterized in that: The top and bottom of the card plate (902) are both set in an arc shape.

7. The bone cement pelvic bone channel repair screw according to claim 1, characterized in that: The rectangular insert (7) is adapted to the rectangular slot (10).

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