A special drill bit for dental post channel preparation

Abstract

The utility model relates to a special drill bit for dental post channel preparation, including the connection handle, the identification handle, the transition handle, the grinding handle, the drill bit tip that are fixed in proper order from top to bottom along the drill bit axial direction, the identification handle's circumferential surface is provided with optical coding mark, is used to dental equipment to carry out image identification, the grinding handle is diamond grinding, and the circumferential distribution has a number of straight row overflow groove on it, is used to cut the discharge of cutting scrap, the drill bit tip adopts spiral knife design, has negative rake angle blade, and the tip is round blunt. Set up optical coding mark, is used to dental equipment to carry out image identification, obtains its material quality, size and so on drill bit parameter, diamond grinding improves cutting efficiency and wear resistance, and straight row overflow groove is used for effectively removing the chip and reducing the cutting resistance, the drill bit tip adopts spiral knife design, has negative rake angle blade, possesses certain self -tapping, can realize self -tapping guide and steady propulsion in the cutting process, and the tip round blunt can avoid side wear to a certain extent.

Description

Technical Field

[0001] This utility model relates to a special drill bit for dental post preparation. Background Technology

[0002] After root canal treatment, affected teeth are typically restored using a post and core crown to restore their shape and function. Among the various post and core restoration techniques, the fiber post combined with resin core technique is currently widely used in clinical prosthodontics. The main advantage of fiber posts is that their elastic modulus is similar to that of dentin, ensuring that stress distribution under load is similar to that of natural teeth. Clinical studies have also shown that fiber posts may reduce the incidence of root fractures.

[0003] During post-core restoration, specific post preparation drills are used to enlarge the root canal, providing space for the future fiber post. Post preparation drills have stronger cutting properties than root canal files. These drills, by removing dentin from the root canal walls, may weaken the root's resistance and lead to stress concentration. When the tensile stress exerted by these post preparation drills on the root canal walls exceeds the tensile strength of the dentin, it can lead to the formation of microcracks.

[0004] Therefore, post preparation may weaken the tooth and potentially cause root fracture within the dentin. Studies have shown that root dentin cracks can occur during fiber post preparation; for example, both the 3M RelyX and Rebilda fiber post preparation drills have caused cracks in the dentin of the root canal wall, which can severely impact the prognosis of the restored tooth. The reason for this is that the cutting efficiency and torque of existing dental post preparation drills are unbalanced. Most existing drills use a helical cutting edge design, which, while ensuring chip removal, is prone to self-feeding, resulting in higher peak torque and increasing the risk of microcracks or fractures in the root canal wall. Furthermore, most existing drill shanks lack digital recognition capabilities, hindering integration with modern digital dental equipment (such as root canal scanners and digital root canal preparation systems) and affecting automated recognition and parameter control. Utility Model Content

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a special drill bit for dental post preparation.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a special drill bit for dental post preparation, comprising a connecting shank, an identification shank, a transition shank, a grinding shank, and a drill tip, which are fixedly arranged sequentially from top to bottom along the drill bit axis; Optical coding marks are provided on the peripheral surface of the identification handle for image recognition by dental equipment; The grinding shank is a diamond grinding shank, and several straight overflow grooves are evenly distributed around its circumference to facilitate the overflow of cutting debris. The drill bit tip features a spiral cutter design with a negative rake angle and a rounded tip.

[0007] Preferably, the connecting handle is a clamping head for clamping onto a dental device.

[0008] Preferably, the optically encoded mark is a QR code etched by laser.

[0009] Preferably, the transition shank gradually tapers along the axial direction from the identification shank to the grinding shank.

[0010] Preferably, the outer periphery of the grinding shank has a diamond coating.

[0011] Preferably, the number of straight overflow troughs is four.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. Equipped with optical coding markers for dental equipment to perform image recognition and obtain drill bit parameters such as material and size; 2. Diamond grinding improves cutting efficiency and wear resistance, while straight overflow grooves effectively remove chips and reduce cutting resistance; 3. The drill bit tip features a spiral cutter design with a negative rake angle, providing a degree of self-tapping capability. This allows for self-guiding and stable advancement during the cutting process, while the rounded tip helps prevent lateral penetration to some extent. The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0014] In the diagram: 1. Connecting shank; 2. Identification shank; 3. Transition shank; 4. Grinding shank; 5. Drill tip; 6. Straight overflow groove. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0017] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0018] like Figure 1 As shown, this embodiment provides a special drill bit for dental post preparation, including a connecting shank 1, an identification shank 2, a transition shank 3, a grinding shank 4, and a drill tip 5, which are fixedly fixed from top to bottom along the drill bit axis. Optical coding marks are provided on the peripheral surface of the identification handle for image recognition by dental equipment; The grinding shank is made of diamond grinding, which improves cutting efficiency and wear resistance. Several straight overflow grooves 6 are evenly distributed around its circumference to discharge cutting chips and reduce cutting resistance. The drill bit tip features a spiral cutter design with a negative rake angle and a rounded tip. It possesses a degree of self-tapping capability, enabling self-guided and stable advancement during the cutting process. The rounded tip also helps prevent lateral penetration to some extent.

[0019] In this embodiment of the invention, the connecting handle is a clamping head for mounting on dental equipment (e.g., a dental bending machine).

[0020] In this embodiment of the invention, the optical coding mark is a QR code etched by laser, which is used by dental equipment for image recognition to obtain drill parameters such as material and size, without the need for manual input of parameters to match the instrument.

[0021] In this embodiment of the invention, the transition shank gradually tapers along the axial direction from the identification shank to the grinding shank.

[0022] In this embodiment of the invention, the outer periphery of the grinding shank has a diamond coating, which serves to perform side cutting and can enlarge the root canal lumen with a smaller torque.

[0023] In this embodiment of the invention, the number of straight overflow troughs is four.

[0024] In this embodiment of the invention, the special drill bit for dental post preparation is mainly used for precise and minimally invasive preparation of the post after root canal treatment, providing suitable space for post-core restoration. In use: 1) Select a drill bit model suitable for the root canal morphology; 2) Install the drill bit onto the matching power unit or handle, ensuring secure fixation; 3) Start the equipment and slowly advance the drill bit at an appropriate speed; the self-tapping tip (rounded) will automatically guide it into the root canal; 4) Maintain moderate pressure during preparation, using the spiral cutting tip for initial cutting, while the four straight overflow grooves effectively remove debris; 5) After preparation, remove the drill bit and thoroughly clean and disinfect it; 6) Check the drill bit for wear or damage; if any is found, replace it promptly.

[0025] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A special drill bit for dental post preparation, characterized in that: Includes a connecting shank, an identification shank, a transition shank, a grinding shank, and a drill tip, which are fixed sequentially from top to bottom along the drill bit axis; The peripheral surface of the identification handle is provided with optical coding marks for image recognition by dental equipment; The grinding shank is a diamond grinding shank, and several straight overflow grooves are evenly distributed around its circumference to facilitate the overflow of cutting debris. The drill bit tip features a spiral cutter design with a negative rake angle and a rounded tip.

2. The special drill bit for dental post preparation according to claim 1, characterized in that: The connecting handle is a clamping head used for clamping onto dental equipment.

3. The special drill bit for dental post preparation according to claim 1, characterized in that: The optically encoded mark is a QR code etched by laser.

4. The special drill bit for dental post preparation according to claim 1, characterized in that: The transition shank gradually tapers along the axial direction from the identification shank to the grinding shank.

5. The special drill bit for dental post preparation according to claim 1, characterized in that: The outer periphery of the grinding shank has a diamond coating.

6. The special drill bit for dental post preparation according to claim 1, characterized in that: The number of straight overflow troughs is four.

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