Root canal linear passage machine needle

Abstract

The utility model relates to the technical field of medical instruments, and discloses a root canal linear passage bur, which comprises a drill bit, a bur body and a connecting part, the drill bit comprises a drill body and a drill tip, the drill body is detachably connected with the bur body, emery is sprayed on the outer wall of the drill body by adopting a sand blasting process, a first external thread is arranged on the outer wall of the drill tip, and the length of the drill tip is 2-3mm; the first external threads are arranged on the outer wall of the drill tip, and the corundum is sprayed on the drill body by adopting a sand blasting process, so that the drill tip can move more stably when being drilled into teeth due to the arrangement of the first external threads, the sprayed corundum can enhance the overall strength of the drill body, and meanwhile, the drill tip is prevented from being damaged. The drill bits and the needle body are detachably connected, so that a doctor only needs to prepare a plurality of drill bits of different models before an operation and replace the drill bits according to actual requirements in the operation process, and compared with the prior art, the drill has the advantages that the drilling capacity is good, the occupied area of an instrument tray is reduced, and the operation of the doctor is facilitated.

Description

Technical Field

[0001] This utility model relates to a straight root canal access bur, belonging to the technical field of medical devices. Background Technology

[0002] A straight-access bur (also known as a straight-access bur or straight-access drill) is an instrument used in dental root canal treatments to help dentists create a straight passage inside the root canal for cleaning, widening, and filling. It is commonly used to work through the root canal system to remove infected and diseased tissue.

[0003] Currently, common straight-access root canal burs consist of a drill bit, a shaft, and a connector. The drill bit is fixed at the bottom of the shaft, and the connector is located at the top. In use, the dentist connects to an external drilling machine via the connector, and then starts the external drilling machine, which rotates the shaft and drill bit to perform the drilling operation. However, in actual use, the following problems have been found:

[0004] 1. The surface of the drill bit is smooth, which may cause the drill bit to slip during the drilling process, which greatly tests the doctor's operation. In addition, the drill bit is mostly made of alloy material, which may have insufficient drilling capacity.

[0005] 2. Since the holes required for each patient will vary, doctors need to select the appropriate burs based on each patient's needs. This requires doctors to prepare multiple burs of different sizes before the operation, which takes up a lot of space on the instrument tray. This makes the placement of surgical instruments on the instrument tray too compact, which may affect the doctor's subsequent surgical operation and make it difficult to quickly find the required tools. Utility Model Content

[0006] In order to solve the above-mentioned problems in the existing technology, this utility model provides a straight root canal access bur.

[0007] The technical solution of this utility model is as follows:

[0008] A straight root canal access bur includes a drill bit, a bur body, and a connecting part. The drill bit includes a drill body and a drill tip, which are detachably connected. The outer wall of the drill body is coated with diamond grit using a sandblasting process. The outer wall of the drill tip is provided with a first external thread. The length of the drill tip is 2-3 mm.

[0009] The drill body has a threaded mounting hole at the top and a second external thread at the bottom end of the needle body that is compatible with the threaded mounting hole. The bottom end of the needle body extends into the threaded mounting hole and is threadedly connected to the threaded mounting hole through the second external thread so that it can be detachably connected to the drill body.

[0010] The top of the drill body is rotatably connected to a connecting sleeve, which has a connecting hole. The needle body can pass through the connecting hole and enter the threaded mounting hole. The connecting sleeve is also provided with a fixing component for fixing the connecting sleeve and the needle body together.

[0011] The fixing component includes a fixing pin, a first pin hole that is horizontally arranged on the connecting sleeve, and a second pin hole that is horizontally arranged on the needle body. The first pin hole can be coaxially arranged with the second pin hole after the needle body is connected into the threaded mounting hole. The fixing pin can fix the connecting sleeve and the needle body by passing through the first pin hole and the second pin hole.

[0012] The top of the drill body is provided with a rotating block arranged in a ring shape. The rotating block has a T-shaped cross-section and is coaxial with the drill body. The bottom of the connecting sleeve is provided with a rotating groove that is adapted to the rotating block. The rotating block is movably connected in the rotating groove. The drill body is rotatably connected to the connecting sleeve through the connection between the rotating block and the rotating groove.

[0013] This utility model has the following beneficial effects:

[0014] This invention features a first external thread on the outer wall of the drill tip and uses a common sandblasting process to coat the outer wall of the drill body with diamond abrasive. The first external thread makes the drill bit move more stably when drilling into the tooth, preventing the drill tip from slipping. The diamond abrasive coating enhances the overall strength and wear resistance of the drill body, allowing it to drill holes more easily. Furthermore, the detachable connection between the drill bit and the needle body allows the surgeon to prepare multiple drill bits of different sizes before surgery and change them as needed during the procedure, minimizing the space required on the instrument tray. Compared to existing technologies, this invention offers advantages such as better drilling capability, reduced instrument tray space, and greater ease of operation for the surgeon. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0016] Figure 2 This is a cross-sectional view of Embodiment 1 of the present utility model;

[0017] Figure 3 This is a cross-sectional view of Embodiment 2 of the present invention;

[0018] Figure 4 This is a magnified view of point A.

[0019] The reference numerals in the figure are as follows:

[0020] 1. Drill bit; 2. Needle body; 3. Connecting part; 4. Drill body; 5. Drill tip; 6. First external thread; 7. Threaded mounting hole; 8. Second external thread; 9. Connecting sleeve; 10. Connecting hole; 11. Fixing pin; 12. First pin hole; 13. Second pin hole; 14. Rotating block; 15. Rotating groove. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] Example 1: Please refer to Figure 1 and Figure 2 This embodiment provides a straight-through root canal bur, including a drill bit 1, a bur body 2, and a connecting part 3. The connecting part 3 is provided for connection with an external drilling machine. The drill bit 1 includes a drill body 4 and a drill tip 5. The drill body 4 is detachably connected to the bur body 2, so that the drill bit 1 can be removed from the bur body 2 for replacement when needed. The outer wall of the drill body 4 is coated with diamond grit using a common sandblasting process in the prior art, and the outer wall of the drill tip 5 is provided with a first external thread 6. With the aforementioned setup, the drill bit 1 and needle body 2 are detachably connected, allowing doctors to prepare multiple drill bits 1 of different models before surgery and replace them during the procedure as needed, without taking up too much space on the instrument tray. The first external thread 6 makes the movement of the drill tip 5 more stable when drilling into the tooth, preventing the drill tip 5 from slipping. The sprayed diamond grit enhances the overall strength and wear resistance of the drill body 4, allowing the drill bit 1 to drill the corresponding hole in the tooth more easily.

[0023] If the drill tip 5 is too long, it is prone to breakage, thus affecting the overall strength of the drill bit 1. If the drill tip 5 is too short, it will affect the overall drilling ability of the drill bit 1. After multiple tests, in this embodiment, the length of the drill tip 5 is selected to be 2-3 mm, so that the drill bit 1 has good structural strength and drilling ability. At the same time, when the 2-3 mm drill tip enters the tooth, the diamond powder sprayed at the drill body 4 can just cut the dentin, thereby establishing a straight path for the root canal and guiding the insertion of the root canal.

[0024] In this embodiment, the top of the drill body 4 has an inwardly threaded mounting hole 7, and the bottom end of the needle body 2 has a second external thread 8 that corresponds to the threaded mounting hole 7. The bottom end of the needle body 2 extends into the threaded mounting hole 7 and is threadedly connected to the threaded mounting hole 7 through the second external thread 8, so that it can be detachably connected to the drill body 4. That is, the needle body 2 and the drill body 4 are detachably connected by a threaded connection. When it is necessary to disassemble or replace the drill bit 1, the drill bit 1 can be unscrewed from the needle body 2 and replaced with another suitable model of drill bit 1. The overall operation is simple and quick.

[0025] Since drill bit 1 needs to rotate during drilling, connecting drill bit 1 and needle body 2 using only a threaded connection may cause drill bit 1 to rotate relative to needle body 2 during drilling, resulting in drill bit 1 becoming loose or even falling off, affecting normal drilling operations. Therefore, based on embodiment one, embodiment two is proposed.

[0026] Example 2, please refer to Figure 3 and Figure 4 This embodiment provides a straight root canal access bur, including all the structures in Embodiment 1. Furthermore, the top of the drill body 4 is rotatably connected to a connecting sleeve 9. In this embodiment, the top of the drill body 4 is provided with a ring-shaped rotating block 14. The cross-section of the rotating block 14 is T-shaped. The rotating block 14 is coaxially arranged with the drill body 4. The bottom of the connecting sleeve 9 is provided with a rotating groove 15 adapted to the rotating block 14. The rotating block 14 is movably connected in the rotating groove 15. The drill body 4 is rotatably connected to the connecting sleeve 9 through the connection between the rotating block 14 and the rotating groove 15.

[0027] The connecting sleeve 9 has a connecting hole 10, through which the needle body 2 can pass and enter the threaded mounting hole 7. The connecting sleeve 9 is also provided with a fixing component for fixing the connecting sleeve 9 and the needle body 2 together. In this embodiment, the fixing component includes a fixing pin 11. The connecting sleeve 9 has a horizontally arranged first pin hole 12, and the needle body 2 has a horizontally arranged second pin hole 13. After the needle body 2 is connected into the threaded mounting hole 7, the first pin hole 12 can be coaxially arranged with the second pin hole 13. The fixing pin 11 can fix the connecting sleeve 9 and the needle body 2 by passing through the first pin hole 12 and the second pin hole 13.

[0028] With the aforementioned configuration, when the drill body 4 is connected to the needle body 2, the needle body 2 passes through the connecting hole 10 and enters the threaded mounting hole 7, and is connected to the threaded mounting hole 7 by the second external thread 8. After the needle body 2 is installed, the connecting sleeve 9 is rotated so that the first pin hole 12 on it and the second pin hole 13 on the needle body 2 are coaxially aligned. Then, the fixing pin 11 is inserted into the first pin hole 12 and the second pin hole 13 to fix the needle body 2 and the connecting sleeve 9 together. At this time, when the needle body 2 starts working, it can drive the connecting sleeve 9 and the drill body 4 to rotate. When the drill body 4 is about to rotate relative to the needle body 2, due to its threaded connection with the needle body 2, the drill body 4 also needs to move along the needle body 2 when rotating. The drill body 4 and the connecting sleeve 9 are connected by the rotating block 14 and the rotating groove 15, so that when the drill body 4 moves along the needle body 2, it needs to drive the connecting sleeve 9 to rotate. However, the connecting sleeve 9 is fixed to the needle body 2 by the fixing pin 11, the first pin hole 12 and the second pin hole 13, and cannot move with the drill body 4. Thus, by restricting the degree of freedom of the drill body 4, the drill body 4 cannot rotate relative to the needle body 2, so as to ensure that the drill bit 1 is not prone to loosening during drilling operations and to ensure the normal drilling operation. When it is necessary to replace the drill bit 1, the drill bit 1 can be replaced by removing the fixing pin 11 and then unscrewing the drill body 4 from the needle body 2. At the same time, due to the characteristics of the pin and the pin hole, the fixing pin 11 will not be thrown out of the first pin hole 12 and the second pin hole 13 when it rotates with the needle body 2, so as to ensure the stability of its connection.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A straight-access root canal bur, comprising a drill bit (1), a bur body (2), and a connecting portion (3), characterized in that: The drill bit (1) includes a drill body (4) and a drill tip (5). The drill body (4) and the needle body (2) are detachably connected. The outer wall of the drill body (4) is coated with diamond sand using a sandblasting process. The outer wall of the drill tip (5) is provided with a first external thread (6). The length of the drill tip (5) is 2-3 mm.

2. The root canal straight access bur according to claim 1, characterized in that: The top of the drill body (4) is provided with a threaded mounting hole (7), and the bottom end of the needle body (2) is provided with a second external thread (8) that is compatible with the threaded mounting hole (7). The bottom end of the needle body (2) extends into the threaded mounting hole (7) and is threadedly connected to the threaded mounting hole (7) through the second external thread (8) so that it can be detachably connected to the drill body (4).

3. The root canal straight access bur according to claim 2, characterized in that: The top of the drill body (4) is also rotatably connected to a connecting sleeve (9), and a connecting hole (10) is provided on the connecting sleeve (9). The needle body (2) can pass through the connecting hole (10) and enter the threaded mounting hole (7). The connecting sleeve (9) is also provided with a fixing component for fixing the connecting sleeve (9) and the needle body (2) together.

4. The root canal straight access bur according to claim 3, characterized in that: The fixing component includes a fixing pin (11), a first pin hole (12) that is horizontally arranged on the connecting sleeve (9), and a second pin hole (13) that is horizontally arranged on the needle body (2). The first pin hole (12) can be coaxially arranged with the second pin hole (13) after the needle body (2) is connected into the threaded mounting hole (7). The fixing pin (11) can fix the connecting sleeve (9) and the needle body (2) by passing through the first pin hole (12) and the second pin hole (13).

5. The root canal straight access bur according to claim 3, characterized in that: The top of the drill body (4) is provided with a rotating block (14) arranged in a ring shape. The cross-section of the rotating block (14) is T-shaped. The rotating block (14) is coaxial with the drill body (4). The bottom of the connecting sleeve (9) (8) is provided with a rotating groove (15) that is adapted to the rotating block (14). The rotating block (14) is movably connected in the rotating groove (15). The drill body (4) is rotatably connected to the connecting sleeve (9) through the connection between the rotating block (14) and the rotating groove (15).

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