A medical degradable magnesium alloy bone plate system

Abstract

The utility model relates to the field of orthopedic medical equipment, in particular to a medical degradable magnesium alloy bone plate system, which includes a nail plate made of magnesium alloy and a locking nail installed on the nail plate, and the surfaces of the nail plate and the locking nail are coated with a calcium phosphate coating, the lower surface of the nail plate is attached to the bone surface, a plurality of nail holes are arranged on the nail plate, the width of the nail plate at the nail holes is greater than the width of the nail plate at the place without nail holes, and the locking nail passes through the nail holes and is installed into the bone; the locking nail includes an integrally formed driving section and a threaded section, and a driving hole is arranged at the end of the driving section. The utility model adopts magnesium alloy material to make the nail plate and the bone nail, realizes the degradation function of the device, and avoids the pain caused by secondary surgery to the patient; by coating the calcium phosphate coating on the outer surface of the nail plate and the bone nail and the inner surface of the through hole, the degradation speed of the device is slowed down, ensuring that the bone injury can be fully healed.

Description

Technical Field

[0001] The utility model relates to the field of orthopedic medical equipment, in particular to a medical degradable magnesium alloy bone plate system. Background Art

[0002] In the field of internal fixation of limb bone fractures, there are many clinical treatment methods, such as three-leaf plate screw internal fixation, anatomical plate screw internal fixation, Kirschner wire internal fixation plus plaster external fixation, simple cancellous bone screw fixation plus plaster external fixation, manual reduction, medial and lateral malleolus splints or plaster external fixation, etc. In recent years, the combination of nail plates and bone nails has been used to nail fractures and bone cracks. In the past, nail plates and bone nails were usually made of titanium alloys and other materials. After implantation, they were non-degradable and could not be absorbed by the human body. A second operation was required to remove the device, which increased the patient's pain and time. Utility Model Content

[0003] The utility model aims to solve the above problems and provides a medical degradable magnesium alloy bone plate system, the technical solution adopted by the utility model is as follows:

[0004] A medical degradable magnesium alloy bone plate system comprises a nail plate made of magnesium alloy and a locking nail installed on the nail plate, wherein the surfaces of the nail plate and the locking nail are coated with a calcium phosphate coating, wherein the lower surface of the nail plate is attached to the bone surface, a plurality of nail holes are arranged on the nail plate, the width of the nail plate at the nail holes is greater than the width of the nail plate at the position without nail holes, and the locking nail is installed into the bone through the nail holes; the locking nail comprises an integrally formed driving section and a threaded section, and the driving hole is arranged at the end of the driving section.

[0005] On the basis of the above solution, the nail plate is a T-shaped structure, and a plurality of nail holes are arranged on two mutually perpendicular sides of the T-shaped structure.

[0006] On the basis of the above scheme, a pre-stressing hole is set in the middle of the nail plate. The pre-stressing hole is an oblong hole, and the extension direction of the oblong hole is consistent with the length direction of the nail plate where it is located. A pre-stressing nail made of magnesium alloy is installed in the pre-stressing hole, and the pre-stressing nail is installed into the bone.

[0007] Preferably, the nail plate is a straight-line structure.

[0008] Preferably, a transition fillet is provided on the outer edge of the upper surface of the nail plate.

[0009] Preferably, the driving hole is in the shape of an equilateral triangle, a hexagon, or a plum blossom.

[0010] Preferably, the top end of the locking nail driving section is not higher than the upper surface of the nail plate.

[0011] The beneficial effects of the utility model are as follows: the nail plate and the bone nail are made of magnesium alloy material, so as to realize the degradation function of the device and avoid the pain caused by secondary surgery to the patient; by coating the outer surface of the nail plate and the bone nail and the inner surface of the through hole with a calcium phosphate coating, the degradation rate of the device is slowed down, so as to ensure that the bone injury can be fully healed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : Schematic diagram of the structure of the T-shaped bone plate system of the utility model;

[0013] Figure 2 : Schematic diagram of another T-shaped bone plate system structure of the utility model;

[0014] Figure 3 : Schematic diagram of the structure of the T-shaped nail plate of the utility model;

[0015] Figure 4 : Schematic diagram of the structure of the one-line bone fracture plate system of the utility model;

[0016] Figure 5 : Schematic diagram of the structure of the one-shaped nail plate of the utility model. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In the description of the present utility model, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0021] like Figures 1 to 5 As shown, a medical degradable magnesium alloy bone plate system includes a nail plate 1 made of magnesium alloy and a locking nail 21 installed on the nail plate 1, and the surfaces of the nail plate 1 and the locking nail 21 are coated with a calcium phosphate coating. Since the degradation rate of calcium phosphate is slow, the degradation rate of the nail body is reduced, ensuring that the bone plate system is degraded layer by layer after achieving a rehabilitation effect in the human body. The lower surface of the nail plate 1 is attached to the bone surface, and its shape is adjusted according to the shape of the bone at the actual installation position, so that the nail plate 1 is attached to the bone surface. A plurality of nail holes 11 are arranged on the nail plate 1, and the number of nail holes 11 can be adjusted according to actual needs. The width of the nail plate at the nail hole 11 is greater than the width of the nail plate at the position without the nail hole 11, so as to ensure the strength of the nail plate 1 at the position of the nail hole 11. The locking nail 21 passes through the nail hole 11 and is installed into the bone, and the installation position of the locking nail 21 should avoid the bone crack. The locking nail 21 includes an integrally formed driving section and a threaded section 32. A driving hole 31 is provided at the end of the driving section. The shape of the driving hole 31 is an equilateral triangle, a hexagon or a plum blossom. Different shapes are selected according to the convenience of operation and the stability of the contact between the driving hole and the nail implanter. The top of the driving section of the locking nail 21 is not higher than the upper surface of the nail plate 1. Preferably, a transition fillet 13 is provided on the outer edge of the upper surface of the nail plate 1, which can not only prevent the edge of the nail plate 1 from scratching the muscle tissue, but also can be used to quickly distinguish the upper and lower surfaces of the nail plate 1 during installation and use, so as to avoid installation errors or delays in treatment time.

[0022] Alternatively, if Figures 1 to 3As shown, the nail plate 1 is a T-shaped structure, and a plurality of nail holes 11 are arranged on two mutually perpendicular sides of the T-shaped structure. In order to more accurately and stably position the bones at the fracture and bone fissure, a pre-stressing hole 12 is arranged in the middle of the nail plate 1. The pre-stressing hole 12 is an oblong hole, and the extension direction of the oblong hole is consistent with the length direction of the nail plate 1 where it is located. A pre-stressing nail 22 made of magnesium alloy is installed in the pre-stressing hole 12, and the pre-stressing nail 22 is installed in the bone. During installation, the locking nail 21 at one end of the T-shaped structure is first implanted into the bone, and then the pre-stressing nail 22 passes through the pre-stressing hole 12 and is punched near the distal end of the bone crack and implanted into the bone, and finally the locking nail 21 on the other side of the pre-stressing nail 22 is fixed. If the installation position of the nail plate 1 needs to be adjusted, the pre-stressing nail 22 can be appropriately loosened, and the nail plate 1 is moved to the distal end to an appropriate distance before being fixed.

[0023] Alternatively, if Figure 4 and Figure 5 As shown, the nail plate 1 is a straight-line structure, and this type of nail plate 1 is mostly used for backbone bones.

[0024] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A medical degradable magnesium alloy bone plate system, characterized in that: The invention comprises a nail plate (1) made of magnesium alloy and a locking nail (21) installed on the nail plate (1), wherein the surfaces of the nail plate (1) and the locking nail (21) are both coated with a calcium phosphate coating, the lower surface of the nail plate (1) is attached to the surface of the bone, a plurality of nail holes (11) are arranged on the nail plate (1), the width of the nail plate at the nail holes (11) is greater than the width of the nail plate at the position without the nail holes (11), and the locking nail (21) passes through the nail holes (11) and is installed into the bone; the locking nail (21) comprises an integrally formed driving section and a threaded section (32), and the driving hole (31) is arranged at the end of the driving section.

2. A medical degradable magnesium alloy bone plate system according to claim 1, characterized in that: The nail plate (1) is a T-shaped structure, and a plurality of nail holes (11) are arranged on two mutually perpendicular sides of the T-shaped structure.

3. A medical degradable magnesium alloy bone plate system according to claim 2, characterized in that: A pre-stressing hole (12) is provided in the middle of the nail plate (1), and the pre-stressing hole (12) is an oblong hole, and the extension direction of the oblong hole is consistent with the length direction of the nail plate (1) where it is located. A pre-stressing nail (22) made of magnesium alloy is installed in the pre-stressing hole (12), and the pre-stressing nail (22) is installed in the bone.

4. The medical degradable magnesium alloy bone plate system according to claim 1, characterized in that: The nail plate (1) is a straight-line structure.

5. The medical degradable magnesium alloy bone plate system according to claim 1, characterized in that: A transition fillet (13) is arranged on the outer edge of the upper surface of the nail plate (1).

6. The medical degradable magnesium alloy bone plate system according to claim 1, characterized in that: The driving hole (31) is in the shape of an equilateral triangle, a hexagon or a plum blossom.

7. The medical degradable magnesium alloy bone plate system according to claim 1, characterized in that: The top end of the driving section of the locking nail (21) is not higher than the upper surface of the nail plate (1).

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