Bone plate nails

Abstract

A bone plate screw includes an integrally formed rod and a support. The outer periphery of the rod is provided with an external thread. The support is formed at the top of the rod. The top surface of the support is recessed with a plurality of slots arranged at angular intervals. The plurality of slots surround the periphery of the rod. The diameter of the inscribed circle tangent to the inner edge of the plurality of slots is larger than the diameter of the rod. The bone plate screw has good overall strength, can stably support the bone, reduce the body's rejection and infection, is easy to install and remove, and reduces the risk of surgical failure.

Description

Bone plate nails This invention relates to a bone implant, and more particularly to a bone plate nail that has good strength, improves the safety and convenience of locking and disassembly, and reduces damage and infection to bodily wounds. When treating fractures, a support plate is usually used in conjunction with bone screws to fix the broken bone and assist in rapid bone healing. The support plate is typically placed on one side of the bone and has perforations. Bone screws are inserted into the support plate and locked to the bone to fix the support plate to one side of the bone. Once the bone has healed, the bone screws are removed. However, using the aforementioned support plates and bone screws to fix the bones has the following disadvantages: 1. Since the support plate and bone screws are separate components, they need to be processed separately and then assembled to fix the bones, making the installation and disassembly process quite complicated. 2. Since the support plate and the bone screw are separate components, the bone screw may not fit effectively with the support plate due to tolerances, assembly gaps, or even insufficient locking force of the bone screw. This results in poor support and stability, and the support plate and bone screw are prone to relative vibration, loosening, and displacement, which may cause the body to reject the implant or cause wound infection. 3. The bone screws are long and thin without a prominent head. The top of the bone screw has a recessed hexagonal groove. Medical personnel usually use a T-wrench to insert into the hexagonal groove and apply force to rotate it, thus locking the bone screw into the bone. Because the diameter of the miniature bone screws is about 1 to 3 millimeters and the size of the hexagonal groove is small, when using a wrench to transmit rotational force, it is easy to cause uneven force application and skewed force application angle, affecting the angle at which the bone screw is locked in, thereby enlarging the wound, or insufficient torque, causing the support plate or bone screw to loosen easily. During disassembly, improper force application can easily enlarge the already healed wound or even cause the bone screw to break. In view of the above deficiencies, the main objective of the present invention is to provide a bone plate nail that has good strength, improves the safety and convenience of installation and disassembly, and reduces damage and infection to bodily wounds. To achieve the aforementioned technical features, the bone plate nail provided by the present invention comprises an integrally formed rod portion and a support portion, wherein: the rod portion is elongated, having a top end and a tail end, and an external thread is provided on the outer periphery of the rod portion, the external thread extending spirally upward from the tail end of the rod portion; and the support portion is integrally formed on the top end of the rod portion, the top surface of the support portion is recessed with a plurality of retaining grooves arranged at angular intervals, the plurality of retaining grooves surround the periphery of the rod portion, the diameter of the inscribed circle tangent to the inner edge of the plurality of retaining grooves is larger than the diameter of the rod portion, and each retaining groove is a blind hole. Utilizing the above-mentioned technical features, the bone plate screw of the present invention has the following functional advantages: 1. Since the support and the rod are integrally formed components, the overall strength is excellent, which can avoid vibration caused by the assembly gap between components, can stably support the bones, reduce the body's rejection and infection, and is easy to install and disassemble, reducing the risk of surgical failure. 2. Because the numerous slots at the top of the support are arranged at angular intervals and surround the periphery of the rod, they can increase torque, maintain force balance, thereby reducing the wound area, reducing the risk of infection, and promoting early wound healing; avoiding the risk of rod breakage when removing bone plate nails, and reducing secondary damage to the healed bone. Please refer to Figures 1 to 4. In a preferred embodiment of the bone plate nail 10 provided by the present invention, it includes an integrally formed rod portion 11 and a support portion 13. The bone plate nail 10 can be made of metal materials, such as stainless steel, titanium alloy, or other metals with good biocompatibility. The rod portion 11 is elongated, having a top end and a bottom end, and an external thread 112 extending spirally upward from the bottom end of the rod portion 11. Preferably, the rod portion 11 has a loose tooth section 111 and a threaded section 113, with the threaded section 113 near the bottom end of the rod portion 11. The loose tooth section 111 is located between the threaded section 113 and the top end of the rod portion 11. The external thread 112 extends from the bottom end of the rod portion 11 to the junction of the threaded section 113 and the loose tooth section 111, so that the surface of the loose tooth section 111 is not threaded. Furthermore, the rod portion 11 also has at least one cutting groove 114, which extends upward from the tail end of the rod portion 11 and passes through a portion of the external thread 112. The at least one cutting groove 114 may include a plurality of cutting grooves 114, which are arranged at angular intervals. In this preferred embodiment, the rod portion 11 has two cutting grooves 114 located on radially opposite sides. Each cutting groove 114 is a flat cutting groove extending upward from the tail end of the rod portion 11. The end section of the rod portion 11 forms a tapered section 115, which gradually tapers towards the tail end of the rod portion 11. Specifically, the end section of the threaded section 113 is tapered to form the tapered section 115, and the at least one cutting groove 114 is formed in the tapered section 115. The support portion 13 is integrally formed on the top end of the rod portion 11 and is flat. The radial distance D1 between the opposite sides of the support portion 13 is greater than the diameter D2 of the rod portion 11. The top surface of the support portion 13 is recessed with a plurality of buckle grooves 132 arranged at angular intervals. The plurality of buckle grooves 132 surround the periphery of the rod portion 11. The diameter D3 of the inscribed circle tangent to the inner edge of the plurality of buckle grooves 132 is greater than the diameter D2 of the rod portion 11. Preferably, the plurality of slots 132 are arranged at equal angular intervals and are blind holes. The radial distance D1 between the opposite sides of the support portion 13 is 4 to 10 times the diameter D2 of the rod portion 11, and the diameter D3 of the inscribed circle tangent to the inner edge of the plurality of slots 132 is greater than 1.5 times the diameter D2 of the rod portion 11. Furthermore, a reinforcing section 116 is provided between the rod portion 11 and the support portion 13. The reinforcing section 116 gradually thickens from the rod portion 11 to the support portion 13 to increase the structural strength between the rod portion 11 and the support portion 13. The reinforcing section 116 may be rounded. In this preferred embodiment, the diameter D2 of the rod 11 is 1 mm, the length of the rod 11 is approximately 11 mm, the length of the threaded section 113 is approximately 4 to 6 mm, the support 13 is in the shape of a circular plate with a thickness of approximately 1 mm, the diameter of the support 13 is 5 mm, and the top surface of the support 13 is provided with four slots 132 arranged at equal angular intervals. Each slot 132 can be a circular groove, and the distance from the center of each slot 132 to the axis of the rod 11 is the same. The diameter of each slot 132 is approximately 1 mm, and the distance between the centers of two slots 132 located on opposite radial sides is approximately 2.9 mm. However, this is not the only possibility; the corresponding size of the bone plate nail 10 can be selected according to actual usage requirements. Please refer to Figures 5 and 6. The corresponding tool 20 can be used to install or remove the bone plate nail 10. The tool 20 has a plurality of protrusions 22 corresponding to the positions and shapes of the plurality of slots 132. The protrusions 22 of the tool 20 can be inserted into the slots 132 respectively. The tool 20 can be rotated to drive the bone plate nail 10 to rotate and lock into the bone. After the rod 11 is locked into the bone, the support 13 can support one side of the bone / body. Please refer to Figure 7. The bone plate nail 10 of the present invention can also be applied to the field of dental implantation, such as bone grafting surgery. When bone grafting surgery is performed, after bone grafting is filled into the alveolar bone, the rod portion 11 of the bone plate nail 10 can pass through the bone grafting and lock into the alveolar bone. The support portion 13 can be attached to the outside of the alveolar bone to form a support plate supporting the outside of the bone grafting, so that the bone grafting is positioned in the alveolar bone for osseointegration. Because the plurality of locking slots 132 are arranged at angular intervals and surround the periphery of the rod 11, the lever arm is increased, making it easier to rotate the bone plate nail 10 and maintain balance. When the rod 11 is locked into the bone, it is less likely to deviate or wobble, thereby reducing the wound area, preventing the rod 11 from loosening, reducing the risk of infection, and promoting early wound healing. During disassembly, the bone plate nail 10 can be rotated with less effort, preventing the angle of the rod 11 from deviating when it is unscrewed, preventing the wound from enlarging, or even breaking the rod 11. This improves the safety of installation and disassembly and reduces the risk of surgical failure. Because the rod portion 11 has a hollow tooth segment 111, it reduces damage to the bone, thereby promoting faster wound healing. Furthermore, the rod portion 11 also has at least one cutting groove 114, which forms a cutting edge to guide the rod portion 11 when it is locked into the bone, making it easier for the tail section of the rod portion 11 to lock into the bone. Since each locking groove 132 is a blind hole, it prevents the overgrown tissue from attaching to the bottom opening of the support portion 13, reducing damage to the already healed wound when removing the bone plate screws 10. Since the support part 13 and the rod part 11 are integrally formed components, after the rod part 11 is locked into the bone, the support part 13 can directly support one side of the bone. The overall strength is good, which can avoid vibration caused by the assembly gap between components, stably support the bone, reduce the body's rejection and infection, and is easy to install and disassemble, reducing the risk of surgical failure. 10: Bone plate nail 11: Bar portion 111: Hollow section 112: External thread 113: Threaded section 114: Cutting groove 115: Tapered section 116: Strengthening section 13: Support portion 132: Fastening groove 20: Tool 22: Convex fastener D1: Distance D2: Diameter D3: Diameter Figure 1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is a side view of a preferred embodiment of the present invention. Figure 3 is a partial cross-sectional side view of a preferred embodiment of the present invention. Figure 4 is an end view of a preferred embodiment of the present invention. Figure 5 is a schematic diagram of a tool applicable to a preferred embodiment of the present invention. Figure 6 is a schematic diagram of a preferred embodiment of the present invention locked to bone. Figure 7 is a schematic diagram of a preferred embodiment of the present invention applied in bone grafting surgery. 10: Bone plate screws 11: Pole section 111: Empty tooth section 112: External thread 113: Threaded section 114: Cutting groove 115: Gradual contraction 13: Support section 132: Snap-in groove

Claims

1. A bone plate nail comprising an integrally formed rod portion and a support portion, wherein: The rod is elongated and has a top end and a tail end. An external thread is provided on the outer periphery of the rod, which extends spirally upward from the tail end of the rod. The support is integrally formed on the top end of the rod. The top surface of the support is recessed with a plurality of slots arranged at angular intervals. The plurality of slots surround the periphery of the rod. The diameter of the inscribed circle tangent to the inner edge of the plurality of slots is larger than the diameter of the rod. Each slot is a blind hole. The bone plate nail as described in claim 1, wherein the rod has at least one cutting groove extending upward from the tail end of the rod and passing through a portion of the external thread. The bone plate nail as described in claim 2, wherein the end of the rod forms a tapering section that gradually tapers toward the tail end of the rod, and the at least one cutting groove is formed in the tapering section. The bone plate nail as described in claim 2, wherein the rod has a toothed section and a threaded section, the threaded section being close to the tail end of the rod, the toothed section being located between the threaded section and the top end of the rod, and the external thread extending from the tail end of the rod to the junction of the threaded section and the toothed section. The bone plate nail as described in claim 4, wherein the end of the threaded section forms a tapering section that gradually tapers toward the tail end of the rod, and the at least one cutting groove is formed in the tapering section. The bone plate nail as described in any one of claims 1 to 5, wherein the distance between the radially opposite sides of the support is 4 to 10 times the diameter of the rod. The bone plate nail as described in any of claims 1 to 5, wherein the diameter of the inscribed circle tangent to the inner edge of the plurality of slots is greater than or equal to 1.5 times the diameter of the rod portion. The bone plate nail as described in claim 7, wherein there is a reinforcing section between the rod and the support, the reinforcing section gradually thickening from the rod to the support.

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