Metal craniomaxillofacial bone fracture plate

Abstract

The utility model discloses a metal cranio-maxillofacial bone fracture plate, which belongs to the technical field of medical instruments and comprises a bone fracture plate body, a first screw and a second screw, the bone fracture plate body comprises a first working surface and a second working surface, a plurality of through holes are arranged between the first working surface and the second working surface, and the first working surface and the second working surface are provided with through holes. When the bone fracture plate body is connected with the first screw, the first screw penetrates to the second working face from the first working face through the through hole. Through the bidirectional design of the through holes in the bone fracture plate body and the bidirectional design of the working surfaces, the bone fracture plate can be used on a left cranio-maxillofacial surface and can also be used on a right cranio-maxillofacial surface, and only the first working surface and the second working surface of the bone fracture plate body need to be distinguished through the convex edge surface on the bone fracture plate body when the bone fracture plate is used; therefore, the first screw or the second screw can be quickly used for fixing, the device can be used on a left cranio-maxillofacial surface and can also be used on a right cranio-maxillofacial surface, and the left universality and the right universality of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a metal cranio-maxillofacial bone plate. Background Art

[0002] The cranio-maxillofacial bone plate is used for fixing cranio-maxillofacial fractures. The cranio-maxillofacial bone plate is usually a strip-shaped plate body, and the shape of the plate body can be deformed according to different use parts, so as to better fit on the cranio-maxillofacial surface, and is used in cooperation with a plurality of screw holes on it and screws to fix it at the cranio-maxillofacial fracture site to realize the fixed connection of the fracture site.

[0003] In the production and use process of the existing cranio-maxillofacial bone plates, it is necessary to divide the left cranio-maxillofacial bone plate and the right cranio-maxillofacial bone plate according to the use of the left and right cranio-maxillofacial surfaces. The two cannot be used interchangeably. And in order to make the bone plate better fit and connect with the cranio-maxillofacial surfaces on the left and right sides of the skull, the screw holes on it are all designed unidirectionally. However, due to the left-right distinction design and the unidirectional design of the screw holes of the cranio-maxillofacial bone plate, the versatility is relatively low, and its production line needs to use two sets of different equipment, and the production cost is relatively high. Content of the Utility Model

[0004] The purpose of the utility model is to provide a metal cranio-maxillofacial bone plate to solve the problems of the left-right distinction design and the unidirectional design of the screw holes of the cranio-maxillofacial bone plate in the above background art, with relatively low versatility, and its production line needs to use two sets of different equipment, and the production cost is relatively high.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A metal cranio-maxillofacial bone plate provided by the utility model includes a bone plate body, a first screw, and a second screw. The bone plate body includes a first working surface and a second working surface, and a plurality of through holes are provided between the first working surface and the second working surface.

[0007] When the bone plate body is connected to the first screw, the first screw passes through the through hole from the first working surface to the second working surface and is fixedly connected to the left cranio-maxillofacial surface.

[0008] When the bone plate body is connected to the second screw, the second screw passes through the through hole from the second working surface to the first working surface and is fixedly connected to the right cranio-maxillofacial surface.

[0009] Furthermore, the bone plate body further includes a first chamfer provided between the through hole and the first working surface and a second chamfer provided between the through hole and the second working surface.

[0010] Further, the first chamfer and the second chamfer are the same and the first chamfer matches the conical surface provided on the head of the first screw.

[0011] Further, the bone plate body further includes an internal thread provided between the first chamfer and the second chamfer, and the internal thread meshes with the external thread provided on the head of the second screw.

[0012] Further, the bone plate body further includes an outward convex edge provided at the boundary of the second working surface, and a convex edge surface located between the second working surface and the first working surface is provided on the outward convex edge, and the convex edge surface is used to distinguish the second working surface and the first working surface.

[0013] Further, cross slots are provided at the tops of both the first screw and the second screw, and fixing threads are provided on the shanks of the first screw and the second screw.

[0014] Further, the boundary of the bone plate body corresponding to the through hole is concentrically circular arc-shaped, and the outward convex edges are relatively distributed on both sides outside the through hole.

[0015] Compared with the prior art, the above one or more technical solutions have the following beneficial effects:

[0016] 1. Through the two-way design of the through hole on the bone plate body and the two-way design of the working surface, the present utility model can be used on the left craniofacial surface and also on the right craniofacial surface. Only when in use, the first working surface and the second working surface of the bone plate body are distinguished through the convex edge surface on the bone plate body, so as to quickly determine whether to use the first screw or the second screw for fixation, enabling it to be used on both the left craniofacial surface and the right craniofacial surface, improving its left and right versatility;

[0017] 2. Through the two-way design of the through hole on the bone plate body and the two-way design of the working surface, since it can be applied to both the left craniofacial surface and the right craniofacial surface, only one set of fixed equipment can be used on the production line, without the need to use two different production and processing equipments, reducing the production and processing cost of the bone plate body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an axonometric view of the bone plate body in the present utility model;

[0019] Figure 2 is an axonometric view of the first screw in the present utility model;

[0020] Figure 3 is an axonometric view of the second screw in the present utility model;

[0021] Figure 4It is an isometric view of the first embodiment of the present utility model;

[0022] Figure 5 It is an isometric view of the second embodiment of the present utility model.

[0023] In the figure: 1. Bone plate body; 10. Oblique conical surface; 11. First working surface; 12. Through hole; 13. Oblique chamfer; 14. Second working surface; 15. Internal thread; 16. Outer convex edge; 17. Convex edge surface; 18. Second oblique chamfer; 19. External thread; 2. First screw; 3. Second screw. Specific embodiments

[0024] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application.

[0025] As Figures 1 to 5 shown, a metal craniofacial bone plate includes a bone plate body 1, a first screw 2, and a second screw 3. The bone plate body 1 includes a first working surface 11 and a second working surface 14, and a plurality of through holes 12 are provided between the first working surface 11 and the second working surface 14.

[0026] When the bone plate body 1 is connected to the first screw 2, the first screw 2 passes through the through hole 12 from the first working surface 11 to the second working surface 14 and is fixedly connected to the left craniofacial surface.

[0027] When the bone plate body 1 is connected to the second screw 3, the second screw 3 passes through the through hole 12 from the second working surface 14 to the first working surface 11 and is fixedly connected to the right craniofacial surface.

[0028] In this embodiment, the bone plate body 1 further includes a first oblique chamfer 13 provided between the through hole 12 and the first working surface 11 and a second oblique chamfer 18 provided between the through hole 12 and the second working surface 14. The first oblique chamfer 13 and the second oblique chamfer 18 are the same, and the first oblique chamfer 13 matches the oblique conical surface 10 provided on the head of the first screw 2.

[0029] Since the first chamfer 13 and the second chamfer 18 are the same, the first screw 2 can be installed from both sides of the through hole 12. Therefore, the bone plate body 1 can be installed on the left cranio-maxillofacial region or the right cranio-maxillofacial region using the first screw 2. Also, the second screw 3 can be installed from both sides of the through hole 12, which can also achieve the installation of the bone plate body 1 on the left cranio-maxillofacial region or the right cranio-maxillofacial region, making the bone plate body 1 have the versatility of being fixed to both the left and right cranio-maxillofacial regions. When the bone plate body 1 is produced and processed, there is no need to divide it into two different production lines according to whether it is suitable for the left or right cranio-maxillofacial region, reducing the equipment investment cost. And when the fixing firmness between the cranio-maxillofacial region and the first screw 2 is relatively good, after the first screw 2 is installed, the head of the first screw 2 can be hidden in the through hole 12, reducing the impact of the first screw 2 on the healing effect of the cranio-maxillofacial region. At this time, the inclined conical surface 10 on the head of the first screw 2 abuts against the surface of the first chamfer 13, achieving the limiting and fixing effect on the first screw 2 and avoiding the problem that the first screw 2 is installed excessively and completely penetrates through the through hole 12. However, when the connection firmness between the cranio-maxillofacial region and the first screw 2 is relatively low, the second screw 3 is used instead of the first screw 2, and the second screw 3 is threadedly connected to the bone plate body 1 and the cranio-maxillofacial region respectively to achieve the mutual locking effect among the three, improving the mutual connection firmness among the three and avoiding the problem that the bone plate body 1 is prone to looseness, which affects the healing effect of the cranio-maxillofacial region.

[0030] In this embodiment, the bone plate body 1 further includes an internal thread 15 provided between the first chamfer 13 and the second chamfer 18. The internal thread 15 meshes with the external thread 19 provided on the head of the second screw 3. When using the second screw 3 to fix the bone plate body 1 on the cranio-maxillofacial region, the external thread 19 on the second screw 3 meshes with the internal thread 15 on the inner wall of the through hole 12 to achieve the locking effect between the bone plate body 1 and the second screw 3, so that the head of the second screw 3 can also be hidden in the through hole 12, reducing the impact of the second screw 3 on the healing effect of the cranio-maxillofacial region. When the thread connection between the second screw 3 and the cranio-maxillofacial region is used, when the connection effect between the first screw 2 and the cranio-maxillofacial region is not ideal, the second screw 3 is used instead of the first screw 2 to improve the connection effect between the second screw 3 and the bone plate body 1, and between the second screw 3 and the cranio-maxillofacial region, and avoid the problem that the bone plate body 1 is prone to looseness after being fixed, which affects the healing effect of the cranio-maxillofacial region.

[0031] In this embodiment, the bone plate body 1 further includes an outward convex edge 16 provided at the boundary of the second working surface 14. The convex edge surface 17 located between the second working surface 14 and the first working surface 11 is provided on the outward convex edge 16, and the convex edge surface 17 is used to distinguish the second working surface 14 and the first working surface 11.

[0032] Since the outer convex edge 16 is located on the second working surface 14 and one side of the outer convex edge 16 is flush with the second working surface 14, the convex edge surface 17 is located outside the range of the first working surface 11. When the plate body 1 is in use, whether the convex edge surface 17 can be seen during installation can be used as a basis for judgment. When the convex edge surface 17 can be seen, the first working surface 11 on the plate body 1 is in contact with the craniomaxillary surface. When the convex edge surface 17 cannot be seen, the second working surface 14 on the plate body 1 is in contact with the craniomaxillary surface. This allows the doctor to quickly distinguish between the first working surface 11 and the second working surface 14 during use, thereby improving the use effect of the plate body 1. When the second working surface 14 conflicts with the craniomaxillary surface, the contact area between the second working surface 14 and the craniomaxillary surface can be increased, thereby improving the effect of craniomaxillary splicing and fixation.

[0033] In this embodiment, the top of the first screw 2 and the second screw 3 are both provided with a cross groove, and the nail rods of the first screw 2 and the second screw 3 are both provided with a fixing thread. This design makes it easier to use a screwdriver to assist in the installation or removal of the first screw 2 and the second screw 3, and enables the first screw 2 or the second screw 3 to be fixedly connected to the craniomaxillofacial region through the fixing thread and improve the stability and firmness of the connection.

[0034] In this embodiment, the boundary on the plate body 1 corresponding to the through hole 12 is a concentric arc shape, and the outer convex edges 16 are relatively distributed on both sides of the outside of the through hole 12. Such a design can not only help doctors to efficiently and accurately identify the front and back sides of the plate body 1, but also increase the contact surface when the second working surface 14 collides with the craniomaxillofacial region, improve the stability of the plate body 1, and increase the uniformity of the spacing between the through hole 12 and the boundary of the plate body 1, so as to avoid the spacing between the through hole 12 and a certain point at the boundary of the plate body 1 being significantly smaller, thereby affecting the overall structural strength of the plate body 1 and causing the problem of easy breakage when it bends and deforms to fit the craniomaxillofacial shape.

[0035] The above description is only the preferred embodiment of the utility model, and the parts not described in the utility model can be implemented by adopting or drawing on existing technologies. Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples. The changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the utility model should also fall within the protection scope of the utility model.

Claims

1. A metal cranio-maxillofacial bone plate, comprising a bone plate body (1), a first screw (2), and a second screw (3), characterized in that, The bone plate body (1) includes a first working surface (11) and a second working surface (14), and a plurality of through holes (12) are provided between the first working surface (11) and the second working surface (14); When the bone plate body (1) is connected to the first screw (2), the first screw (2) passes through the through hole (12) from the first working surface (11) towards the second working surface (14) and is fixedly connected to the left craniofacial region; When the bone plate body (1) is connected to the second screw (3), the second screw (3) passes through the through hole (12) from the second working surface (14) towards the first working surface (11) and is fixedly connected to the right craniofacial region.

2. The metal cranio-maxillofacial osteosynthesis plate according to claim 1, wherein: The bone plate body (1) further includes a first chamfer (13) provided between the through hole (12) and the first working surface (11), and a second chamfer (18) provided between the through hole (12) and the second working surface (14).

3. The metal cranio-maxillofacial bone plate according to claim 2, characterized in that: The first chamfer (13) and the second chamfer (18) are the same, and the first chamfer (13) matches the tapered surface (10) provided on the head of the first screw (2).

4. The metal cranio-maxillofacial bone plate according to claim 3, characterized in that: The bone plate body (1) further includes an internal thread (15) provided between the first chamfer (13) and the second chamfer (18), and the internal thread (15) meshes with the external thread (19) provided on the head of the second screw (3).

5. The metal cranio-maxillofacial osteosynthesis plate according to claim 4, wherein: The bone plate body (1) further includes an outer convex edge (16) provided at the boundary of the second working surface (14), and a convex edge surface (17) located between the second working surface (14) and the first working surface (11) is provided on the outer convex edge (16), and the convex edge surface (17) is used to distinguish the second working surface (14) and the first working surface (11).

6. The metal cranio-maxillofacial bone plate according to claim 5, characterized in that: Both the top of the first screw (2) and the second screw (3) are provided with cross slots, and fixing threads are provided on the screw rods of the first screw (2) and the second screw (3).

7. The metal cranio-maxillofacial osteosynthesis plate according to claim 6, characterized in that: The boundary of the bone plate body (1) corresponding to the through hole (12) is concentrically arc-shaped, and the outer convex edges (16) are relatively distributed on both sides outside the through hole (12).

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