Dental medical screw

Abstract

The utility model discloses a dental medical screw which comprises a screw body and a fixing screw rod. A connecting piece is movably installed at the top end of the screw body, a fixing screw rod penetrates through the top of the connecting piece, and a groove is formed in the connecting piece. The fixing screw rod comprises a screw rod external thread, a hexagonal groove and a lug; and the screw external thread is arranged on the outer surface of the fixed screw. Due to the fact that the protruding pieces are arranged on the top of the fixing screw rod, when the screw is assembled with the screw body and a connecting piece, the fixing screw rod is continuously locked through screw-thread fit between the screw rod external threads and the screw internal threads, the protruding pieces continuously extrude the grooves downwards, the grooves extrude the protruding pieces inwards, and the protruding pieces are fixed through the fixing screw rod. The friction force between the convex piece and the groove is increased through the outward expansion occlusal force, and the anti-loosening effect is achieved, so that the phenomenon that the dental medical screw is not prone to loosening is achieved, and the stability and the service life of the implant are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a dental medical screw. Background Art

[0002] Dental medical screws are widely used in the field of dental medicine. They are usually used to fix teeth, bone tissue or as accessories for implants. They have a spiral shape and can be rotated or screwed into bones or teeth. In dental implants, they can be used as accessories for implants; in dental restorations, they can be used to fix restorations such as porcelain teeth; in periodontal surgery, they can be used to fix gum tissue or bones.

[0003] To this end, patent publication number CN112515754B discloses a medical device screw comprising a screw body, a reinforcing rod disposed within the screw body, and an accessory detachably connected to the screw body. The accessory is used to connect to a traction member, and the reinforcing rod is stronger than the screw body. This application reduces the likelihood of medical device screws breaking during treatment, ensuring the effectiveness of clinical treatment.

[0004] The medical device screws mentioned above have the ability to reduce the possibility of medical device screws breaking during treatment. However, since dental medical screws are connected through threads, problems with the screw material, design, and installation process may cause loosening, which may damage the crown and affect the stability and service life of the implant. Utility Model Content

[0005] The utility model aims to provide a dental medical screw, which is used to solve the defect that the existing dental medical screws are easy to loosen.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a dental medical screw, comprising a screw body and a fixing screw; a connecting piece is movably installed at the top of the screw body, and a fixing screw is passed through the top of the connecting piece, and a groove is provided inside the connecting piece; the fixing screw comprises an external screw thread, a hexagonal groove and a protrusion; the external screw thread is provided on the outer surface of the fixing screw, the hexagonal groove is fixed to the top of the fixing screw, and a protrusion is provided at the bottom end of the hexagonal groove.

[0007] Preferably, the screw body includes a screw external thread, a cross groove, a screw internal thread, a coating, a functional layer and a bottom layer, and the screw external thread is arranged on the outer surface of the screw body.

[0008] Preferably, the cross groove is fixed to the top of the screw body, the internal screw thread is arranged inside the screw body, and the internal screw thread and the external screw thread are threadedly connected.

[0009] Preferably, the bottom layer is arranged at the center of the screw body, the material of the bottom layer is titanium, and the thickness of the bottom layer is 0.5-1.5 μm.

[0010] Preferably, a functional layer is provided on the outside of the bottom layer, and the thickness of the functional layer is 2-3 μm.

[0011] Preferably, the exterior of the functional layer is coated with a coating, and the coating is a diamond-like carbon film material.

[0012] Preferably, the inner diameter of the groove is smaller than the outer diameter of the protrusion in a normal state, and a card structure is formed between the protrusion and the groove.

[0013] The utility model provides a dental medical screw, which has the advantages that: by providing a convex piece, the top of the fixed screw is provided with a convex piece. When assembled with the screw body and the connecting piece, the fixed screw is continuously locked through the threaded cooperation between the external thread of the screw and the internal thread of the screw inside the screw body, so that the convex piece is continuously squeezed downward between the groove, and the groove squeezes the convex piece inward. After locking, the convex piece increases the friction between the groove and the convex piece through the bite force of outward expansion, thereby playing an anti-loosening effect, thereby realizing that the dental medical screw is not easy to loosen, thereby ensuring the stability and service life of the implant. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the screw body of the utility model in a disassembled state when viewed from above;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the screw body of the utility model in a disassembled state when viewed from above;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the screw body in a half-section state of the present invention;

[0018] Figure 5 This is a schematic diagram of the three-dimensional structure of the connector of the present invention in a half-section state;

[0019] Figure 6 This is a schematic diagram of the cross-sectional structure of the screw body of the present invention when viewed from above.

[0020] In the figure: 1. Screw body; 11. Screw external thread; 12. Cross groove; 13. Screw internal thread; 14. Functional layer; 15. Transition layer; 16. Bottom layer; 2. Connector; 3. Fixing screw; 31. Screw external thread; 32. Hexagonal groove; 33. Lug; 4. Groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figures 1-6 The utility model provides a dental medical screw, including a screw body 1 and a fixed screw 3; a connecting piece 2 is movably installed on the top of the screw body 1, and a fixing screw 3 is passed through the top of the connecting piece 2, and a groove 4 is provided inside the connecting piece 2; the fixing screw 3 includes a screw external thread 31, a hexagonal groove 32 and a convex piece 33; the screw external thread 31 is provided on the outer surface of the fixing screw 3, the hexagonal groove 32 is fixed to the top of the fixing screw 3, and the bottom end of the hexagonal groove 32 is provided with a convex piece 33, the screw body 1 includes a screw external thread 11, a cross groove 12, a screw internal thread 13, a functional layer 14, a transition layer 15 and a bottom layer 16, the screw external thread 11 is provided on the screw The outer surface of the main body 1 has a cross groove 12 fixed to the top of the screw main body 1. The internal screw thread 13 is provided inside the screw main body 1 and is threadedly connected to the external screw thread 31. The bottom layer 16 is provided at the center of the screw main body 1. The material of the bottom layer 16 is titanium, and the thickness of the bottom layer 16 is 0.5-1.5 μm. The outside of the bottom layer 16 is provided with a functional layer 15, and the thickness of the functional layer 15 is 2-3 μm. The outside of the transition layer 15 is coated with a functional layer 14, and the functional layer 14 is a diamond-like film material. The inner diameter of the groove 4 is smaller than the outer diameter of the protrusion 33 in the normal state, and a card structure is formed between the protrusion 33 and the groove 4.

[0023] Refer to the attached Figures 1-6When the device is used, the screw body 1 is first implanted through the medical device. The cross groove 12 on the top of the screw body 1 is convenient for medical staff to perform the implantation operation. Then, after the connector 2 and the screw body 1 are matched, the connector 2 is placed in the implant and inserted into the top of the screw body 1 together. Then, the fixing screw 3 is used to penetrate the connector 2 and enter the interior of the screw body 1. The screw outer thread 31 and the screw inner thread 13 are locked by the thread fit. The hexagonal groove 32 on the top of the fixing screw 3 is convenient for medical staff to operate. When the fixing screw 3 and the screw body 1 are continuously locked, the screw 3 and the screw body 1 are locked. When tightened, the protrusion 33 is continuously squeezed downward and between the groove 4 at the top of the connector 2, and the groove 4 squeezes the protrusion 33 inward. When the fixing screw 3 is locked with the screw body 1, the protrusion 33 will continue to expand outward after being squeezed. The bite force of the outward expansion increases the friction between the protrusion 33 and the groove 4, which has the effect of preventing loosening. The surface of the screw body 1 is coated with a functional layer 14. The material of the functional layer 14 is diamond-like thin film material. After high-temperature steam sterilization, the appearance remains intact. The bottom layer 16 is prepared by magnetron sputtering and the transition layer 15 is prepared by PECVD technology, so that it has good biocompatibility.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dental medical screw comprising a screw body (1) and a fixing screw (3); Its characteristics are: A connecting piece (2) is movably mounted on the top of the screw body (1), and a fixing screw (3) passes through the top of the connecting piece (2), and a groove (4) is provided inside the connecting piece (2); The fixing screw (3) comprises an external screw thread (31), a hexagonal groove (32) and a protruding piece (33); The screw external thread (31) is arranged on the outer surface of the fixed screw (3), the hexagonal groove (32) is fixed to the top end of the fixed screw (3), and the bottom end of the hexagonal groove (32) is provided with a convex piece (33).

2. The dental medical screw according to claim 1, characterized in that: The screw body (1) comprises a screw external thread (11), a cross groove (12), a screw internal thread (13), a functional layer (14), a transition layer (15) and a bottom layer (16); the screw external thread (11) is arranged on the outer surface of the screw body (1).

3. The dental medical screw according to claim 2, characterized in that: The cross groove (12) is fixed to the top of the screw body (1), the screw internal thread (13) is arranged inside the screw body (1), and the screw internal thread (13) and the screw rod external thread (31) are threadedly connected.

4. The dental medical screw according to claim 2, characterized in that: The bottom layer (16) is arranged at the center of the screw body (1), the material of the bottom layer (16) is titanium, and the thickness of the bottom layer (16) is 0.5-1.5 μm.

5. The dental medical screw according to claim 4, characterized in that: A transition layer (15) is provided on the outside of the bottom layer (16), and the thickness of the transition layer (15) is 2-3 μm.

6. The dental medical screw according to claim 5, characterized in that: The exterior of the transition layer (15) is coated with a functional layer (14), and the functional layer (14) is a diamond-like film material.

7. The dental medical screw according to claim 1, characterized in that: The inner diameter of the groove (4) is smaller than the outer diameter of the protruding piece (33) in a normal state, and a card structure is formed between the protruding piece (33) and the groove (4).

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