An implant for rib resection and reconstruction

Abstract

The utility model relates to an implant for rib resection and reconstruction, including a rib plate and a transverse connecting seat, and its innovation lies in: it also includes a universal connecting rod, the end of the rib plate is provided with a ball head seat with a symmetrical structure along its central axis, and a limiting notch arranged adjacent to the ball head seat and used to limit the range of motion of the universal connecting rod, the ball head seat has a ball socket and a through hole that are interconnected, one end of the universal connecting rod is provided with a ball head, the ball head of the universal connecting rod is loosely matched with the ball socket of the ball head seat, part of the rod body of the universal connecting rod is arranged in the through hole, and the part of the rod body is loosely matched with the through hole, so that the universal connecting rod performs axial rotation along the axis of the rib plate, the other end of the universal connecting rod is inserted into the transverse connecting seat, and the transverse connecting seat is used to connect the spinal connecting rod. The utility model has a three-dimensional micro-motion characteristic, and while it has a certain micro-movement ability in the sagittal position, it can also achieve a certain angle of micro-motion deflection ability in the coronal position and the sagittal position.

Description

Technical Field

[0001] The utility model relates to an implant, in particular to a rib resection and reconstruction implant which is suitable for rib reconstruction after thoracic vertebrae tumor removal surgery and is micro-movable and stable. Background Art

[0002] Both primary thoracic vertebrae bone tumors and metastatic thoracic vertebrae bone tumors are common bone tumors. Surgical treatment usually focuses on removing the lesion. When removing the thoracic vertebrae, it is necessary to remove part of the ribs connected to the lesion thoracic vertebrae. There are two reasons for removing the ribs. First, the ribs are connected to the thoracic vertebrae. If the ribs are not removed, the thoracic vertebrae with lesions cannot be removed. Second, when removing the thoracic vertebrae with lesions, it is also necessary to check whether the bone tumor has metastasized to the adjacent ribs to prevent incomplete removal of the tumor lesions.

[0003] After rib resection, the chest wall at the posterior part of the thoracolumbar region lacks effective connection and fixation due to partial rib resection, which makes the posterior chest wall unstable. At the same time, the organs in the posterior chest wall also lack effective protection.

[0004] At this time, a posterior chest wall reconstruction device is needed to restore the stability of the thorax after rib removal. There are currently two forms of clinical rib reconstruction systems - rib plates: one is a rib claw; the other is a rib reconstruction plate. Since the above two implants are used for reconstruction and fixation between ribs, and the thoracic vertebrae with tumor lesions are completely removed at this time, the posterior spine stability reconstruction uses a combination of artificial vertebrae (or titanium mesh) and thoracolumbar posterior nail rod system. If rib claws and rib reconstruction plates are used, they cannot be connected and fixed with the existing thoracolumbar posterior nail rod system. Therefore, the existing, traditional rib reconstruction system is used in thoracic vertebrae tumor removal - rib resection, and the posterior thorax reconstruction and fixation are ineffective.

[0005] Therefore, there is a clinical need for a fixation device that can be used for thoracic vertebrae tumor removal - rib resection and posterior thoracic rib reconstruction. This device can be connected and fixed to the posterior thoracic and lumbar screw-rod system. It is best to be able to meet the micro-motion characteristics of the thorax during the patient's daily activities and avoid fatigue failure caused by rigid fixation.

[0006] The fixation device used for rib reconstruction in the prior art includes a bone plate and a transverse connecting seat connected to the bone plate. The bone plate itself has a connecting mechanism that is connected to it and is used to connect with the transverse connecting seat. The connecting mechanism includes an elastic bracket and a connecting rod, that is, the two ends of the elastic bracket are respectively an integral structure with the bone plate and the connecting rod, and the connecting rod is detachably connected to the transverse connecting seat. Although this structure can be connected and fixed with the posterior thoracic and lumbar screw rod system, there are many deficiencies in clinical use and actual production, as follows: 1. Since the elastic bracket and the rib plate are an integral structure, only wire cutting or machining milling can be used in the actual production process. 1. The rib plates on the market are usually made of pure titanium. The elastic part of the rib plate with overall structural design has poor elastic properties due to the material properties of pure titanium, and the notch sensitivity of pure titanium leads to insufficient structural strength and mechanical fatigue performance. 2. The elastic part of the overall structural design can only satisfy the rib plate to have a certain elasticity in the sagittal direction, and has almost no elasticity in the coronal and horizontal directions. The micro-motion of the human chest ribs is in a three-dimensional state. Therefore, during the clinical use of its products, the actual experience and effect of patients after surgery are not good. Summary of the invention

[0007] The utility model aims to provide an implant for rib resection and reconstruction which has three-dimensional micro-motion characteristics and has a certain micro-movement ability in the sagittal position and can also realize a certain angle of micro-motion deflection ability in the coronal position and the sagittal position.

[0008] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: an implant for rib resection and reconstruction, including a rib plate and a cross-connection seat, and its innovative point is: it also includes a universal connecting rod,

[0009] The end of the rib plate is provided with a ball head seat along its central axis and in a symmetrical structure, and a limiting notch arranged adjacent to the ball head seat and used to limit the range of motion of the universal connecting rod, the limiting notch is located on the inner side of the ball head seat, and the ball head seat has a ball socket and a through hole that are interconnected.

[0010] A ball head is provided at one end of the universal connecting rod, and the ball head of the universal connecting rod is loosely matched with the ball socket of the ball head seat. Part of the rod body of the universal connecting rod is arranged in the through hole, and the part of the rod body is loosely matched with the through hole, so that the universal connecting rod performs axial rotation along the axis of the rib plate.

[0011] The other end of the universal connecting rod is inserted into the transverse connecting seat, and the transverse connecting seat is used to connect the spine connecting rod.

[0012] In the above technical solution, the ball socket of the ball head seat has an avoidance notch, which facilitates the other end of the universal connecting rod to pass through the through hole through the limiting notch and the avoidance notch.

[0013] In the above technical solution, the through hole is a variable diameter hole, and the inner end diameter of the through hole is smaller than the outer end diameter.

[0014] In the above technical solution, the minimum diameter of the inner end of the through hole is Φ3mm~Φ8mm, the maximum diameter of the outer end is Φ4mm~Φ10mm, and the amplitude range of the axial rotational motion of the universal connecting rod along the axis of the rib plate is -15°~+15°.

[0015] In the above technical solution, the axis line of the ball socket is lower than the upper end surface of the rib plate.

[0016] In the above technical solution, the limiting notch is designed as a waist-shaped notch.

[0017] In the above technical solution, the cross-connecting seat has insertion holes arranged along its radial direction and screw holes arranged along its axial direction, and the insertion holes are located below the screw holes and are connected thereto, and the other end of the universal connecting rod is inserted into the insertion hole of the cross-connecting seat. At the same time, a flat surface for strengthening the clamping force of the cross-connecting seat is provided on the rod body of the universal connecting rod, and the screws for fixing the universal connecting rod and the cross-connecting seat are screwed into the screw holes, and the end face of the screw is pressed against the flat surface of the universal connecting rod to prevent the universal connecting rod from rotating.

[0018] In the above technical solution, a slot for connecting the spine connecting rod is provided at the bottom of the cross-connecting seat, and the slot is connected to the oval-shaped round hole on the cross-connecting seat through a channel, so that the spine connecting rod can be elastically inserted into the slot.

[0019] In the above technical solution, the rib plate includes a plate body, and a plurality of bone claws corresponding to each other and used to hold the ribs are arranged on both sides of the plate body, and a plurality of screw holes arranged separately and connected with the ribs by screws are arranged on the plate body.

[0020] In the above technical solution, the root of the bone claw is connected to the side wall of the plate body in an arc-shaped transition connection.

[0021] The positive effect of the utility model is that after the rib resection and reconstruction implant of the utility model is adopted, since the utility model also includes a universal connecting rod,

[0022] The end of the rib plate is provided with a ball head seat along its central axis and in a symmetrical structure, and a limiting notch arranged adjacent to the ball head seat and used to limit the range of motion of the universal connecting rod, the limiting notch is located on the inner side of the ball head seat, and the ball head seat has a ball socket and a through hole that are interconnected.

[0023] A ball head is provided at one end of the universal connecting rod, and the ball head of the universal connecting rod is loosely matched with the ball socket of the ball head seat. Part of the rod body of the universal connecting rod is arranged in the through hole, and the part of the rod body is loosely matched with the through hole, so that the universal connecting rod performs axial rotation along the axis of the rib plate.

[0024] The other end of the universal connecting rod is inserted into the transverse connecting seat, and the transverse connecting seat is used to connect the spine connecting rod;

[0025] The utility model has micro-motion characteristics. When used, the rib plate is connected and fixed to the ribs, and the cross-connection seat is connected and fixed to the posterior thoracic and lumbar screw rod system. It is used for thoracic vertebra tumor removal (rib resection) and posterior thorax reconstruction and fixation.

[0026] Specifically, the rib plate is clamped and fixed on the ribs with a pressure clamp, and the other end of the universal connecting rod is fixedly connected to the cross-connecting seat with a screw, and the connecting rod (spinal connecting rod) of the posterior thoracic and lumbar screw rod system is fixed on the cross-connecting seat. The rib plate and the universal connecting rod of the utility model are split structures, which are connected by ball head and ball socket rotation cooperation. Part of the rod body has a certain rotation space in the through hole, so that the universal connecting rod can make a circular motion along the axis of the rib plate within a certain angle range, and can also have a displacement motion of 0 to 8 mm along the axis of the ribs.

[0027] The implant can be connected to the ribs and fixed to the posterior thoracic and lumbar screw-rod system to form a stable overall structure, while having a certain micro-motion ability to reduce the risk of fatigue fracture of the implant due to stress concentration during movement.

[0028] Further beneficial effects are as follows: 1. The implant of the utility model is a split structure, which is not only highly processed but also has lower production costs than the integral structure in the prior art; 2. The utility model utilizes a ball head and a ball socket to connect the rib plate to the universal connecting rod, which not only improves the structural strength but also greatly improves the mechanical fatigue performance; 3. The ball head of the utility model is not restricted in direction when rotating in the ball socket, so that it has three-dimensional micro-motion characteristics. While it has a certain micro-movement ability in the sagittal position, it can also achieve a certain angle of micro-motion deflection ability in the coronal and sagittal positions, overcoming the disadvantage that the elastic part of the overall structural design in the prior art can only satisfy the rib plate to have a certain elasticity in the sagittal direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a specific implementation mode of the utility model;

[0030] Figure 2 yes Figure 1 A top view schematic diagram of

[0031] Figure 3 yes Figure 2 AA cross-sectional view of ;

[0032] Figure 4 It is a three-dimensional structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and given embodiments, but is not limited thereto.

[0034] like Figure 1 , 2 As shown in 3 and 4, an implant for rib resection and reconstruction comprises a rib plate 1 and a cross-connecting seat 2, characterized in that it also comprises a universal connecting rod 3,

[0035] The end of the rib plate 1 is provided with a ball head seat 4 which is symmetrically structured along its central axis, and a limiting notch 11 which is arranged adjacent to the ball head seat 4 and is used to limit the range of motion of the universal connecting rod 3. The limiting notch 11 is located on the inner side of the ball head seat 4. The ball head seat 4 has a ball socket 41 and a through hole 42 which are connected to each other.

[0036] One end of the universal connecting rod 3 is provided with a ball head 31, and the ball head 31 of the universal connecting rod 3 is loosely matched with the ball socket 41 of the ball head seat 4. Part of the rod body of the universal connecting rod 3 is arranged in the through hole 42, and the part of the rod body is loosely matched with the through hole 42, so that the universal connecting rod 3 performs axial rotation along the axis of the rib plate 1.

[0037] The other end of the universal connecting rod 3 is inserted into the transverse connecting seat 2, and the transverse connecting seat 2 is used to connect the spine connecting rod.

[0038] like Figure 2 , 4 As shown, in order to allow the universal connecting rod to pass through the through hole of the ball head seat, which is convenient for assembling the rib plate and the universal connecting rod, the ball socket 41 of the ball head seat 4 has an avoidance notch 411, which is convenient for the other end of the universal connecting rod 3 to pass through the through hole 42 through the limiting notch 11 and the avoidance notch 411. In the specific machining process, part of the ball head seat 4 is cut off to form the avoidance notch 411, which is convenient for the oblique insertion of the universal connecting rod to ensure the matching connection between the ball head and the ball socket.

[0039] like Figure 3 As shown, in order to ensure that the universal connecting rod can rotate slightly relative to the rib plate, the through hole 42 is a variable diameter hole, and the inner end diameter of the through hole 42 is smaller than the outer end diameter.

[0040] Furthermore, in order to ensure the micro-motion characteristics of the utility model, the minimum aperture of the inner end of the through hole 42 of the utility model is Φ3mm~Φ8mm, the maximum aperture of the outer end is Φ4mm~Φ10mm, and the amplitude range of the axial rotational motion of the universal connecting rod 3 along the axis of the rib plate 1 is -15°~+15°.

[0041] Furthermore, in order to form a low notch on the ball head seat and reduce the irritation to the chest wall skin, the axis of the ball socket 41 is lower than the upper end surface of the rib plate 1. In other words, most of the structure of the ball head is designed at the lower end of the rib plate. Since the lower end of the rib plate is the chest cavity, the internal space is large enough to accommodate the raised ball head part without soft tissue irritation and foreign body sensation.

[0042] like Figure 2 As shown, in order to limit the range of motion and displacement of the ball head of the universal connecting rod on the rib plate, the limiting notch 11 is designed as a waist-shaped notch.

[0043] like Figure 3 , 4 As shown, in order to realize a quick-connect structure between the cross-connecting seat and the universal connecting rod, and to ensure the stability of the connection between the two and prevent rotation, the cross-connecting seat 2 has an insertion hole 21 arranged along its radial direction and a screw hole 22 arranged along its axial direction, and the insertion hole 21 is located below and connected to the screw hole 22, and the other end of the universal connecting rod 3 is inserted into the insertion hole 21 of the cross-connecting seat 2. At the same time, a flat surface 32 for strengthening the clamping force of the cross-connecting seat 2 on it is provided on the rod body of the universal connecting rod 3, and the screw for fixing the universal connecting rod 3 and the cross-connecting seat 2 is screwed into the screw hole 22, and the end face of the screw is pressed tightly against the flat surface 32 of the universal connecting rod 3 to prevent the universal connecting rod 3 from rotating.

[0044] like Figure 4 As shown, in order to achieve rapid positioning and connection between the cross-connecting seat and the spinal connecting rod, a slot 23 for connecting the spinal connecting rod is provided at the bottom of the cross-connecting seat 2, and the slot 23 is connected to the oval circular hole on the cross-connecting seat 2 through a channel, so that the spinal connecting rod can be elastically connected and snapped into the slot 23.

[0045] like Figure 4 As shown, in order to ensure that the rib plate can be tightly held on the ribs without shaking or moving, the rib plate 1 includes a plate body 12, and a plurality of bone claws 13 corresponding to each other and used to hold the ribs are provided on both sides of the plate body 12, and a plurality of screw holes 14 separately arranged and connected to the ribs with screws are provided on the plate body 12.

[0046] Furthermore, in order to release the stress between the bone claws and the rib plate and prevent the bone claws from being clamped on the ribs and broken by the pressure clamps, the roots of the bone claws 13 are connected to the side walls of the plate body 12 of the rib plate 1 as an arc transition connection.

[0047] The utility model has micro-motion characteristics, and the rib plate 1 is connected and fixed with the ribs, and the transverse connecting seat 2 is connected and fixed with the posterior thoracic and lumbar vertebrae screw rod system, and is used for thoracic vertebrae tumor removal (rib resection), posterior thorax reconstruction and fixation,

[0048] Specifically, the rib plate 1 is clamped on the ribs by clamping the bone claws 13 with a pressure clamp, and the other end of the universal connecting rod 3 is fixedly connected to the cross-connecting seat 2 by a screw, and the connecting rod 5 of the posterior thoracic and lumbar screw rod system is fixed on the cross-connecting seat 2. The rib plate and the universal connecting rod of the utility model are split structures, which are connected by a ball head and a ball socket rotation fit. Part of the rod body has a certain rotation space in the through hole, so that the universal connecting rod can make a circular motion along the axis of the rib plate within a certain angle range, and can also have a displacement motion of 0 to 8 mm along the axis of the ribs, which greatly increases the patient's three-dimensional micro-motion ability after the implantation of the utility model structure.

[0049] The implant can be connected to the ribs and fixed to the posterior thoracic and lumbar screw-rod system to form a stable overall structure, while also having a certain micro-motion ability to reduce the risk of fatigue fracture of the implant due to stress concentration during movement.

[0050] Further beneficial effects are as follows: 1. The implant of the utility model is a split structure, which is not only highly processed but also has lower production costs than the integral structure in the prior art; 2. The utility model utilizes a ball head and a ball socket to connect the rib plate to the universal connecting rod, which not only improves the structural strength but also greatly improves the mechanical fatigue performance; 3. The ball head of the utility model is not restricted in direction when rotating in the ball socket, so that it has three-dimensional micro-motion characteristics. While it has a certain micro-movement ability in the sagittal position, it can also achieve a certain angle of micro-motion deflection ability in the coronal and sagittal positions, overcoming the disadvantage that the elastic part of the overall structural design in the prior art can only satisfy the rib plate to have a certain elasticity in the sagittal direction.

[0051] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An implant for rib resection and reconstruction, comprising a rib plate (1) and a cross-connecting seat (2), characterized in that: It also includes a universal connecting rod (3), The end of the rib plate (1) is provided with a ball head seat (4) having a symmetrical structure along its central axis, and a limiting notch (11) arranged adjacent to the ball head seat (4) and used to limit the range of motion of the universal connecting rod (3), wherein the limiting notch (11) is located on the inner side of the ball head seat (4), and the ball head seat (4) has a ball socket (41) and a through hole (42) which are connected to each other. A ball head (31) is provided at one end of the universal connecting rod (3), the ball head (31) of the universal connecting rod (3) is loosely matched with the ball socket (41) of the ball head seat (4), a part of the rod body of the universal connecting rod (3) is arranged in the through hole (42), and the part of the rod body is loosely matched with the through hole (42), so that the universal connecting rod (3) performs axial rotational motion along the axis of the rib plate (1), The other end of the universal connecting rod (3) is inserted into the transverse connecting seat (2), and the transverse connecting seat (2) is used to connect the spine connecting rod.

2. The implant for rib resection and reconstruction according to claim 1, characterized in that: The ball socket (41) of the ball head seat (4) has an escape notch (411) to facilitate the other end of the universal connecting rod (3) to pass through the through hole (42) via the limiting notch (11) and the escape notch (411).

3. The implant for rib resection and reconstruction according to claim 1, characterized in that: The through hole (42) is a variable diameter hole, and the inner end diameter of the through hole (42) is smaller than the outer end diameter.

4. The implant for rib resection and reconstruction according to claim 1 or 3, characterized in that: The minimum diameter of the inner end of the through hole (42) is Φ3mm-Φ8mm, and the maximum diameter of the outer end is Φ4mm-Φ10mm. The amplitude range of the axial rotation movement of the universal connecting rod (3) along the axis of the rib plate (1) is -15° to +15°.

5. The implant for rib resection and reconstruction according to claim 1, characterized in that: The axis of the ball socket (41) is lower than the upper end surface of the rib plate (1).

6. The implant for rib resection and reconstruction according to claim 1, characterized in that: The limiting notch (11) is designed as a waist-shaped notch.

7. The implant for rib resection and reconstruction according to claim 1, characterized in that: The transverse connecting seat (2) has an insertion hole (21) arranged along its radial direction and a screw hole (22) arranged along its axial direction, and the insertion hole (21) is located below the screw hole (22) and is connected thereto. The other end of the universal connecting rod (3) is inserted into the insertion hole (21) of the transverse connecting seat (2). At the same time, a flat surface (32) for strengthening the clamping force of the transverse connecting seat (2) on it is provided on the rod body of the universal connecting rod (3). The screw for fixing the universal connecting rod (3) and the transverse connecting seat (2) is screwed into the screw hole (22), and the end face of the screw is pressed against the flat surface (32) of the universal connecting rod (3) to prevent the universal connecting rod (3) from rotating.

8. The implant for rib resection and reconstruction according to claim 1 or 7, characterized in that: The bottom of the transverse connecting seat (2) is provided with a slot (23) for connecting the spinal column connecting rod, and the slot (23) is connected to the oval circular hole on the transverse connecting seat (2) through a channel, so that the spinal column connecting rod can be elastically inserted into the slot (23).

9. The implant for rib resection and reconstruction according to claim 1, characterized in that: The rib plate (1) comprises a plate body (12), and a plurality of bone claws (13) corresponding to each other and used to hold the ribs are provided on both sides of the plate body (12), and a plurality of screw holes (14) arranged separately and used to realize screw connection with the ribs are provided on the plate body (12).

10. The implant for rib resection and reconstruction according to claim 9, characterized in that: The root of the bone claw (13) is connected to the side wall of the plate body (12) in an arc-shaped transition connection.

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