Novel implanted bone plate

Abstract

The utility model discloses a novel implanted bone lamella, and relates to the technical field of medical instruments. The bone fixing device comprises a bone fixing plate, a fixing seat and bone nails, a plurality of circular fixing grooves are formed in the upper surface of the bone fixing plate, the fixing seat is installed in the circular fixing grooves and provided with sliding spherical surfaces attached to the inner walls of the circular fixing grooves, the bone nails are connected with the fixing seat, and the sliding spherical surfaces are arranged on the fixing seat. A through hole allowing the lower end of the bone nail to stretch out is formed in the groove bottom of the circular fixing groove, a blocking groove is formed in the top face of the fixing base, and a blocking ring piece abutting against the blocking groove is arranged at the head of the bone nail. The novel implanted bone lamella has the advantages that the angle of the implanted bone nail is flexible and adjustable, the bone lamella is protected, and rehabilitation of a patient is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a novel implantable bone plate. Background Technology

[0002] Bone plates are implants used in orthopedic surgery, primarily for fracture fixation and bone reconstruction. They provide additional support and stability to help restore the fracture site to its normal structure and function, aiming to repair and stabilize the fracture. Bone plates are diverse in design and can be customized to different anatomical locations and load-bearing conditions. They can be applied in various ways, such as protection, neutralization, compression, bridging, and support. Bone plates are typically made of metals, such as titanium alloys or stainless steel, which offer good biocompatibility and mechanical properties.

[0003] During bone plate fixation, surgeons often consider the insertion angle of the bone screws to better exert compressive stress on the bone surface, or to avoid fracture lines, important nerves, and blood vessels. This aims to achieve a more stable fixation effect between the screws and the bone plate and bone surface. Currently, in most bone plate fixations, the screws are inserted vertically through the bone plate. When it is necessary to insert the screws at an angle, there is a risk that the drill bit may damage one edge of the bottom hole of the bone plate, directly damaging the bone plate. Alternatively, during the insertion of the screw at an angle, stress concentration may occur at the neck and nut of the screw, potentially leading to screw breakage or stripped nuts.

[0004] Therefore, existing technologies need to be improved. Utility Model Content

[0005] The technical problem to be solved by this utility model is that bone plate may be damaged when bone screws are implanted at an angle in the prior art. The purpose is to provide a new type of implantable bone plate, which adopts corresponding technical means and has the beneficial effects of flexible and adjustable bone screw angle, protection of bone plate, and facilitating patient recovery.

[0006] This utility model is achieved through the following technical solution:

[0007] This invention provides a novel implantable bone plate, which includes a bone fixation plate, a deflection mounting base, and a bone screw.

[0008] The upper surface of the bone fixation plate has multiple circular fixing grooves, the deflection mounting base is installed in the circular fixing grooves, and the deflection mounting base has a sliding spherical surface that fits against the inner wall of the circular fixing groove.

[0009] The bone screw is connected to the deflection mounting base. The bottom of the circular fixing groove is provided with a through hole for the lower end of the bone screw to extend out. The top surface of the deflection mounting base is provided with a stop groove. The head of the bone screw is provided with a stop ring that abuts against the stop groove.

[0010] In the above technical solution, the deflection mounting base can deflect and slide within the circular fixing groove, thereby achieving a certain angle of deflection for the bone screw during implantation. After the bone screw is implanted into the bone tissue, the bottom of the circular fixing groove has a flared through hole, preventing the bottom edge of the through hole from being drilled away. Furthermore, because the sliding spherical surface of the deflection mounting base fits snugly against the wall of the circular fixing groove, it maintains a large contact area even after deflection, ensuring the bone screw remains perpendicular to the deflection mounting base and preventing slippage. The large contact area between the head of the bone screw and the deflection mounting base also prevents stress concentration between the bone screw and the bone fixation plate implanted at an inclined angle.

[0011] Furthermore, in this utility model, the through hole is configured as a flared opening, with the open end of the through hole located on the lower side, and the top of the deflection mounting base located inside the circular fixing groove.

[0012] Furthermore, in this invention, both the inner wall of the circular fixing groove and the sliding spherical surface are provided with anti-slip structures.

[0013] Furthermore, in this invention, the aforementioned anti-slip structure includes a silicone layer, the surface of which is provided with hemispherical protrusions.

[0014] Furthermore, in this invention, the deflection angle of the bone nail relative to the center line of the circular fixing groove is in the range of 0°-15°.

[0015] Furthermore, in this utility model, the bone fixation plate includes a first plate and a second plate that are detachably connected. The end of the first plate is provided with an insertion part, and the end of the second plate is provided with a slot for accommodating the insertion part. The slot is threaded with a fixing screw. The insertion part is provided with an elongated hole for the fixing screw to pass through, and the elongated hole is provided with a stop bar that cooperates with the fixing screw to achieve fixation.

[0016] Furthermore, in this utility model, guide strips are provided on both sides of the insertion part, and the slot wall is provided with a guide groove to accommodate the guide strips.

[0017] Furthermore, in this invention, both the fixing screw and the bone screw are configured as internal hexagon screws, and the internal hexagon dimensions of the internal hexagon screws are consistent.

[0018] Furthermore, in this invention, the edges and corners of the bone fixation plate are rounded at all external locations.

[0019] Furthermore, in this invention, the bone fixation plate is provided with several weight-reducing holes.

[0020] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0021] 1. Flexible Implantation Angle: The circular fixation groove is hemispherical in shape, and the outer surface of the deflection mount is a hemispherical sliding spherical surface. The sliding spherical surface can fit against the groove wall of the circular fixation groove, allowing the deflection mount to slide and deflect at a certain angle within the circular fixation groove. The bone screw and the deflection mount are connected, and the deflection mount can deflect in any direction, thereby allowing the bone screw to deflect in any direction as well. This flexible implantation angle meets the needs of more application environments.

[0022] 2. Excellent Protective Effect: After the bone screw is implanted into the bone tissue, the bottom of the circular fixation groove has a flared through-hole, preventing the bottom edge of the through-hole from being drilled out. Furthermore, because the sliding spherical surface of the deflection mount fits snugly against the groove wall, there is still a large contact area even after deflection. The bone screw remains perpendicular to the deflection mount, preventing stripping. The large contact area between the head of the bone screw and the deflection mount also prevents stress concentration in bone screws and bone fixation plates implanted at an angle. This protects the bone tissue and bone fixation plate, extends their service life, and facilitates patient recovery. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure of the novel implantable bone plate of this utility model;

[0025] Figure 2 This is a cross-sectional schematic diagram of the deflection mounting base and bone screw of this utility model (the bone screw remains vertical);

[0026] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 This is a cross-sectional schematic diagram of the deflection mounting base and bone screw of this utility model (bone screw deflected 15°);

[0028] Figure 5 This is a cross-sectional view of the insertion part and the side of the slot of this utility model;

[0029] Figure 6 This is a cross-sectional view of the front of the insertion part and slot of this utility model.

[0030] The attached diagram shows the markings and corresponding component names: 1-Bone fixation plate, 101-Circular fixation groove, 102-First plate, 103-Second plate, 104-Insertion part, 1041-Elongated hole, 1042-Guide strip, 105-Slot, 1051-Guide groove, 106-Stop strip, 107-Weight reduction hole, 2-Deflection mounting base, 201-Abutting groove, 202-Sliding spherical surface, 3-Bone screw, 301-Abutting ring, 4-Anti-slip structure, 5-Through hole, 6-Fixing screw. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only for explaining the present utility model and are not intended to limit the present utility model. The following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the present utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0032] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of this utility model, "a plurality of" means at least two. It should also be noted in the description of the embodiments of this utility model that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Example 1

[0034] This embodiment 1 provides a novel implantable bone plate, such as Figure 1-Figure 4 As shown, the specific structure and principle are described below.

[0035] In this embodiment, combined with Figure 1 As shown, the novel implantable bone plate of Example 1 mainly includes three parts: bone fixation plate 1, deflection mounting seat 2, and bone screw 3. The bone fixation plate 1 is used to provide additional support and stability for bone tissue, helping the fracture site to restore normal structure and function. The deflection mounting seat 2 is used to adjust the implantation angle of the bone screw 3. The bone screw 3 is used to implant bone tissue to restrict the bone fixation plate 1.

[0036] Furthermore, in combination Figure 1 As shown, the bone fixation plate 1 is made of stainless steel or pure titanium, which has the advantages of durability and no rejection. Two symmetrical circular fixation grooves 101 are opened on the left side of the bone fixation plate 1, and two symmetrical circular fixation grooves 101 are opened on the right side of the bone fixation plate 1. The circular fixation grooves 101 are hemispherical in shape.

[0037] It should be noted that, in combination Figure 1 As shown, the edges and corners of the bone fixation plate 1 are rounded to avoid being too sharp and affecting recovery.

[0038] Combination Figure 1 and Figure 2 As shown, a deflection mounting seat 2 is placed in each circular fixing groove 101. The outer surface of the deflection mounting seat 2 is a sliding spherical surface 202, which fits against the inner wall of the circular fixing groove 101. The deflection mounting seat 2 can deflect in any direction at a certain angle within the circular fixing groove 101.

[0039] In some implementations of this embodiment, combined with Figure 1 and Figure 2 As shown, the bone screw 3 is generally made of titanium alloy, which has the advantages of no rejection and long service life. A through hole is provided at the center of the top surface of the deflection mounting base 2, through which the bone screw 3 passes. Furthermore, a through hole 5 is provided at the center of the bottom of the circular fixing groove 101, through which the bone screw 3 can pass and be implanted into the bone.

[0040] It should be noted that the through hole 5 is flared, with the open end of the through hole 5 located on the lower side. This reduces obstruction when the bone screw 3 is tilted, preventing the bone screw 3 from being tilted during implantation into the bone tissue (e.g., Figure 4 As shown, drilling away one edge of the bottom of the through hole 5 of the bone fixation plate 1 provides better protection.

[0041] In some implementations of this embodiment, combined with Figure 2 and Figure 4 As shown, when the deflection mounting base 2 slides in the circular fixing groove 101, the center of the circular fixing groove 101 is the center line, and the vertical line passing through the center of the circular fixing groove 101 is the center line. The deflection angle range of the bone nail 3 with the center line as the reference is 0°-15°. This angle change is suitable for most tilting implantation situations. The specific angle can be adjusted according to the actual implantation surgery situation, and the angle adjustment is flexible.

[0042] In some implementations of this embodiment, combined with Figure 2 and Figure 3As shown, to enhance stability after fixing, anti-slip structures 4 are provided on the inner wall of the circular fixing groove 101 and the surface of the sliding spherical surface 202. Furthermore, the anti-slip structure 4 is made of silicone, which covers the inner wall of the circular fixing groove 101 and the surface of the sliding spherical surface 202. Hemispherical protrusions are provided on the surface of the silicone layer. The protrusions on the inner wall of the circular fixing groove 101 and the protrusions on the sliding spherical surface 202 mutually block each other, effectively preventing sliding.

[0043] In some implementations of this embodiment, combined with Figure 2 As shown, when the top surface of the deflection mounting base 2 is parallel to the top surface of the bone fixation plate 1, the top of the deflection mounting base 2 is located inside the circular fixation groove 101, so that after the deflection mounting base 2 is deflected, its edge will not protrude from the top surface of the bone fixation plate 1 (e.g., Figure 4 (As shown), it works even better.

[0044] Furthermore, in combination Figure 2 and Figure 4 As shown, the top surface of the fixing base 2 is provided with a stop groove 201, the bone nail 3 passes through the stop groove 201, and the head of the bone nail 3 is fixedly fitted with a stop ring 301. The lower surface of the stop ring 301 abuts against the bottom of the stop groove 201, thereby playing a limiting role.

[0045] The working principle of the novel implantable bone plate in this embodiment is as follows:

[0046] The circular fixing groove 101 is hemispherical in shape, and the outer surface of the deflection mounting base 2 is a hemispherical sliding spherical surface 202. The sliding spherical surface 202 can fit against the groove wall of the circular fixing groove 101, allowing the deflection mounting base 2 to slide and deflect at a certain angle within the circular fixing groove 101. The bone screw 3 is connected to the deflection mounting base 2, which can deflect in any direction, thus allowing the bone screw 3 to deflect in any direction as well. This provides flexible implantation angles to meet a wider range of application environments. After the bone screw 3 is implanted into the bone tissue, the bottom of the circular fixing groove 101 has a flared through hole 5, preventing the bottom edge of the through hole 5 from being drilled out. Furthermore, because the sliding spherical surface 202 of the deflection mounting base 2 fits against the groove wall of the circular fixing groove 101, it maintains a large contact area even after deflection. The bone screw 3 remains perpendicular to the deflection mounting base 2, preventing slippage. The large contact area between the head of the bone screw 3 and the deflection mounting base 2 prevents stress concentration between the bone screw 3 and the bone fixation plate 1 when implanted at an angle. Protects bone tissue and bone fixation plate 1, extending service life.

[0047] Example 2

[0048] The novel implantable bone plate of this embodiment is based on the novel implantable bone plate of Embodiment 1, with the addition of a structure that allows the length of the bone fixation plate 1 to be adjusted.

[0049] In this embodiment, combined with Figure 1 As shown, the bone fixation plate 1 includes two parts: a first plate 102 and a second plate 103. A long strip-shaped insertion part 104 is fixedly installed on the left end of the first plate 102, and a slot 105 for accommodating the insertion part 104 is provided on the right end of the second plate 103.

[0050] Combination Figure 1 , Figure 5 and Figure 6 As shown, the fixing screw 6 is threadedly connected to the slot 105. A long through hole 1041 is provided on the insertion part 104, through which the fixing screw 6 passes. Two retaining bars 106 are fixed inside the long through hole 1041. The screw shank of the fixing screw 6 is located between the two retaining bars 106, and the bottom surface of the head of the fixing screw 6 abuts against the retaining bars 106, thereby fixing the insertion part 104.

[0051] Combination Figure 6 As shown, the guide bar 1042 is fixed to the bottom of both sides of the insertion part 104, and the corresponding slot 105 has guide grooves 1051 on both sides of the slot wall, and the guide bar 1042 slides along the guide grooves 1051.

[0052] It should be noted that both the fixing screw 6 and the bone screw 3 are hex socket head cap screws. The hex socket head cap screws have the same internal hex size, which makes it easy to use the same disassembly tool when installing or removing them, without the need for replacement, making them more convenient to use.

[0053] In some implementations of this embodiment, combined with Figure 1 As shown, two weight-reducing holes 107 are provided on the bone fixation plate 1 to reduce the weight of the bone fixation plate 1, save material costs, and reduce the burden of bone tissue fixation.

[0054] The working principle of the novel implantable bone plate in this embodiment is as follows:

[0055] Tighten the fixing screw 6 upwards, ensuring the head of the fixing screw 6 does not contact the top surface of the elongated hole 1041. At this point, the insertion part 104 can slide along the slot 105. Adjust the length of the bone fixation plate 1 according to the actual usage. After adjusting the length, tighten the fixing screw 6 downwards, pressing the head of the fixing screw 6 against the top surface of the elongated hole 1041 to achieve fixation between the first plate 102 and the second plate 103.

[0056] In summary, this utility model provides a novel implantable bone plate, comprising a bone fixation plate 1, a deflection mounting base 2, and a bone screw 3. The upper surface of the bone fixation plate 1 has multiple circular fixation grooves 101. The deflection mounting base 2 is installed within the circular fixation grooves 101, and the deflection mounting base 2 has a sliding spherical surface 202 that conforms to the inner wall of the circular fixation groove 101. The bone screw 3 is connected to the deflection mounting base 2. The bottom of the circular fixation groove 101 has a through hole 5 for the lower end of the bone screw 3 to extend out. The top surface of the deflection mounting base 2 has a stop groove 201, and the head of the bone screw 3 has a stop ring 301 that abuts against the stop groove 201. The through hole 5 is configured as a flared opening, with the open end of the through hole 5 located on the lower side. The top of the deflection mounting base 2 is located inside the circular fixation groove 101. Both the inner wall of the circular fixation groove 101 and the sliding spherical surface 202 are provided with anti-slip structures 4. The anti-slip structure 4 includes a silicone layer, and the surface of the silicone layer is provided with hemispherical protrusions. The deflection angle of the bone screw 3 relative to the center line of the circular fixation groove 101 ranges from 0° to 15°. The bone fixation plate 1 includes a detachably connected first plate 102 and a second plate 103. The end of the first plate 102 is provided with an insertion part 104, and the end of the second plate 103 is provided with a slot 105 to accommodate the insertion part 104. The slot 105 is threadedly connected to a fixing screw 6. The insertion part 104 is provided with an elongated hole 1041 through which the fixing screw 6 passes, and the elongated hole 1041 is provided with a stop bar 106 to cooperate with the fixing screw 6 for fixation. Guide bars 1042 are provided on both sides of the insertion part 104, and the groove wall of the slot 105 is provided with a guide groove 1051 to accommodate the guide bars 1042. Both the fixing screw 6 and the bone screw 3 are configured as internal hexagon screws, and the internal hexagon dimensions of the internal hexagon screws are consistent. All edges and corners of the bone fixation plate 1 are rounded. The bone fixation plate 1 is provided with several weight-reducing holes 107. Therefore, the novel implantable bone plate provided by this utility model has the beneficial effects of flexible and adjustable angle of implantation of bone nail 3, protection of bone plate, and facilitating patient rehabilitation.

[0057] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A novel implantable bone plate, characterized in that, Includes a bone fixation plate (1), a deflection mount (2), and bone screws (3). The upper surface of the bone fixation plate (1) has a plurality of circular fixation grooves (101), the deflection mounting base (2) is installed in the circular fixation grooves (101), and the deflection mounting base (2) has a sliding spherical surface (202) that fits against the inner wall of the circular fixation grooves (101). The bone screw (3) is connected to the deflection mounting base (2). The bottom of the circular fixing groove (101) is provided with a through hole (5) for the lower end of the bone screw (3) to extend out. The top surface of the deflection mounting base (2) is provided with a stop groove (201). The head of the bone screw (3) is provided with a stop ring (301) that abuts against the stop groove (201).

2. The novel implantable bone plate according to claim 1, characterized in that, The through hole (5) is configured as a flared opening, with the open end of the through hole (5) located on the lower side, and the top of the deflection mounting base (2) located inside the circular fixing groove (101).

3. The novel implantable bone plate according to claim 1, characterized in that, The inner wall of the circular fixing groove (101) and the sliding spherical surface (202) are both provided with anti-slip structures (4).

4. The novel implantable bone plate according to claim 3, characterized in that, The anti-slip structure (4) includes a silicone layer, and the surface of the silicone layer is provided with hemispherical protrusions.

5. The novel implantable bone plate according to claim 1, characterized in that, The deflection angle of the bone nail (3) relative to the center line of the circular fixing groove (101) is 0°-15°.

6. The novel implantable bone plate according to claim 1, characterized in that, The bone fixation plate (1) includes a first plate (102) and a second plate (103) that are detachably connected. The first plate (102) has an insertion part (104) at its end, and the second plate (103) has a slot (105) at its end to accommodate the insertion part (104). The slot (105) is threaded with a fixing screw (6). The insertion part (104) has an elongated hole (1041) through which the fixing screw (6) passes. The elongated hole (1041) has a stop bar (106) that cooperates with the fixing screw (6) to achieve fixation.

7. The novel implantable bone plate according to claim 6, characterized in that, The insertion part (104) is provided with guide strips (1042) on both sides, and the slot (105) has a guide groove (1051) on its groove wall to accommodate the guide strips (1042).

8. The novel implantable bone plate according to claim 6, characterized in that, Both the fixing screw (6) and the bone nail (3) are configured as internal hexagon screws, and the internal hexagon dimensions of the internal hexagon screws are consistent.

9. The novel implantable bone plate according to any one of claims 1-8, characterized in that, The edges and corners of the bone fixation plate (1) are rounded.

10. The novel implantable bone plate according to any one of claims 1-8, characterized in that, The bone fixation plate (1) is provided with several weight-reducing holes (107).

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