Novel dental drill bit

Abstract

The novel dental drill bit comprises a drill rod, a limiting part and a spiral drill bit body which are sequentially connected, a reverse spiral groove is formed in the periphery of the spiral drill bit body, the front end of the spiral drill bit body extends from the groove wall of the reverse spiral groove to form a tooth-shaped cutting edge, and the limiting part comprises a limiting sleeve and a connecting part which are arranged in a sleeved mode. The two ends of the connecting part are connected with the drill rod and the spiral drill bit, the spiral drill bit is arranged in the limiting sleeve, the front end of the spiral drill bit partially extends out of the limiting sleeve, the limiting sleeve provides axial limiting for the spiral drill bit, the liquid inlet channel penetrates through the whole drill bit, and a water outlet hole is formed in the center of the front end of the drill bit. The tooth-shaped cutting edges are used for cutting and reaming, a bone disc can be formed in front of the drill bit and used for protecting sinus membrane, the limiting sleeve provides axial limiting for the spiral drill bit, the reverse spiral groove can contain chippings, the working resistance of the drill bit is reduced, the hole wall can be extruded to improve bone density, cooling liquid can flow out of the liquid inlet channel and the liquid outlet hole, bone burn is avoided, and the service life of the spiral drill bit is prolonged. And the use experience of the user can be better improved.

Description

Technical Field

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

[0002] With the development of modern dentistry, dental implant technology has gradually become an important means to solve the problem of tooth loss. However, the anatomical conditions of many patients cannot meet the requirements for implant placement. For example, after the loss of maxillary teeth, the maxillary sinus wall will gradually become thinner due to the lack of functional stimulation from the teeth. Moreover, with age, the maxillary sinus also tends to expand, causing the sinus floor to become lower. In addition, the bone density of the alveolar ridge in the posterior maxilla is low, and severe loss of bone height often occurs after tooth loss. The relationship between implants and bones is like the relationship between trees and soil. There must be sufficient bone volume for implants to function for a long time. In clinical practice, patients with alveolar ridge height of less than 8mm in the maxillary posterior area often require maxillary sinus lift surgery.

[0003] A maxillary sinus lift is a dental procedure used to increase bone volume in the edentulous area at the back of the maxilla before dental implant placement. During this procedure, the surgeon fills the floor of the maxillary sinus cavity with bone graft material to provide adequate bone support for the implant. This helps ensure the implant's stability and long-term function. Currently, the most commonly used maxillary sinus lift procedure is the internal lift, also known as the transalveolar approach. This is a proven and reliable surgical technique, but it also has the disadvantages of not being performed under direct vision or observation, making it difficult to detect and manage intraoperative complications such as mucosal perforation. Therefore, avoiding mucosal perforation is crucial for this procedure. The most classic and widely used clinical technique for maxillary sinus lifts is the percussive approach. This involves using a specially designed osteotome to impact the sinus floor, creating a minor fracture. This, in turn, indirectly elevates the sinus mucosa by lifting the bone fragments. However, currently available osteotome used for maxillary sinus lifts often have the following drawbacks: 1. The percussive approach can cause perforation of the sinus mucosa and discomfort to the patient. In summary, due to the above reasons and the shortcomings of the existing design, traditional osteotomes cannot fully meet clinical needs, thus affecting the overall quality of maxillary sinus augmentation surgery.

[0004] Therefore, it is necessary to provide a novel dental drill for oral maxillary sinus lifting and bone augmentation surgery to solve the above problems. Utility Model Content

[0005] In order to solve the above-mentioned problems in the prior art, the present application discloses a novel dental drill bit, comprising a drill rod, a limiter, and a spiral drill bit connected in sequence. The spiral drill bit is provided with a reverse spiral groove on its outer circumference, and the front end of the spiral drill bit extends from the groove wall of the reverse spiral groove to form a tooth-shaped cutting edge;

[0006] The limiting portion includes a sleeved limiting sleeve and a connecting portion, the two ends of the connecting portion are respectively connected to the drill rod and the spiral drill bit, the spiral drill bit is arranged in the limiting sleeve and the front end of the spiral drill bit partially extends out of the limiting sleeve, so that the limiting sleeve provides axial limitation for the spiral drill bit during operation;

[0007] It also includes a liquid inlet channel running through the drill rod, the connecting portion and the drill bit. The front end of the spiral drill bit is provided with a liquid outlet, and the liquid outlet is arranged at the center of the front end of the spiral drill bit.

[0008] Furthermore, there are a plurality of reverse spiral grooves evenly distributed on the outer peripheral wall of the spiral drill bit, and there are a plurality of corresponding cutting edges evenly distributed on the front end of the spiral drill bit.

[0009] Furthermore, the cutting edge is in an inverted cone shape as a whole, so that when the spiral drill bit cuts the bone, a conical bone disc can be formed and retained at the front end of the spiral drill bit to provide protection for the sinus membrane.

[0010] Furthermore, the limiting sleeve is provided with an elastic buckle, and the connecting portion is correspondingly provided with a matching slot. The limiting sleeve and the connecting portion are fixedly matched through the buckle, so that the limiting sleeve provides axial limitation for the operation of the spiral drill bit.

[0011] Furthermore, at least one cooling hole is provided on the outer circumference of the limiting sleeve close to the spiral drill bit.

[0012] Furthermore, the outer diameter of the spiral drill bit decreases gradually from the rear end to the front end in a streamlined manner.

[0013] Furthermore, the circumferential diameter of the connecting portion is larger than the circumferential diameter of the spiral drill bit, so that the connecting portion forms a stop portion after being connected to the spiral drill bit.

[0014] Furthermore, an annular boss is provided at one end of the connecting portion connected to the drill rod.

[0015] Furthermore, a circumferential protrusion is provided on one end of the limiting sleeve away from the connecting portion.

[0016] Furthermore, a mounting portion is provided at one end of the drill rod not connected to the limiting portion, and a cross-section of the mounting portion is in an I-shape.

[0017] The novel dental drill provided in this application has at least the following beneficial effects:

[0018] 1. This application provides the main cutting and expanding function for the drill bit during high-speed rotation through the cutting edge. The cutting edge at the front end of the drill bit is generally tooth-shaped or inverted conical. When cutting bones, the tooth-shaped or conical bone disc is retained at the front end of the drill bit to effectively protect the sinus membrane. At the same time, the limit sleeve provides precise axial limitation for the spiral drill bit, which can better enhance the user experience.

[0019] 2. The reverse spiral groove of the present invention can not only accommodate debris, but also reduce the resistance of the drill bit during operation, and at the same time can squeeze the hole wall to increase bone density;

[0020] 3. The liquid inlet channel and the liquid outlet hole located at the center of the front end of the drill bit of this application can inject coolant during the working process of the drill bit to avoid bone burns. In addition, the cooling port can provide better external cooling effect for the working process of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 : A three-dimensional schematic diagram of a drill bit involved in an embodiment of the present application;

[0023] Figure 2 : Schematic diagram of the drill bit disassembly involved in the embodiment of the present application;

[0024] Figure 3 : A schematic side view of a drill bit according to an embodiment of the present application;

[0025] Figure 4 : Another side view of the drill bit according to the embodiment of the present application;

[0026] Figure 5 :The embodiments of this application involve Figure 4 Schematic cross-sectional view of ;

[0027] Figure 6 : Schematic diagram of a drill bit according to an embodiment of the present application, viewed from above (front end of the drill bit);

[0028] Figure 7 : Schematic diagram of a top view (one end of a drill rod) of a drill bit involved in an embodiment of the present application;

[0029] In the figure: 1- spiral drill bit; 11- reverse spiral groove; 12- cutting edge;

[0030] 2-limiting portion; 21-limiting sleeve; 211-elastic buckle; 212-cooling port; 213-circumferential convex portion; 22-connecting portion / stop portion; 221-slot; 222-annular boss;

[0031] 3-drill rod; 31-mounting part;

[0032] 4-liquid inlet channel; 41-liquid outlet. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings of 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 some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0034] References to "one embodiment" or "embodiment" herein refer to specific features, structures, or characteristics that may be included in at least one implementation of the present invention. In describing the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplification. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific manner, and are therefore not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly specifying the number of the technical features referred to. Thus, a feature designated "first" or "second" may explicitly or implicitly include one or more of the features. Furthermore, the terms "first," "second," and the like are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein.

[0035] Please refer to Figure 1-7As shown, a new dental drill bit includes a drill rod 3, a limiting part 2 and a spiral drill bit 1 connected in sequence. A reverse spiral groove 11 is provided on the outer periphery of the spiral drill bit 1. The front end of the spiral drill bit 1 is extended by the groove wall of the reverse spiral groove 11 to form a toothed cutting edge 12. The drill bit provides a cutting function when rotating at high speed to achieve hole expansion. The cutting edge 12 provides the main cutting function when the drill bit is working. The cutting edge 12 at the front end of the drill bit is a tooth-shaped protrusion. When cutting bones, the protruding bone disc is retained at the front end of the drill bit, which can effectively provide protection for the sinus membrane. The reverse spiral groove 11 has a chip capacity, which reduces the working resistance of the drill bit and can achieve hole wall extrusion at the same time, which can effectively improve the bone density around the hole wall. The limiting portion 2 includes a sleeved limiting sleeve 21 and a connecting portion 22. The two ends of the connecting portion 22 are respectively connected to the drill rod 3 and the spiral drill bit 1. The spiral drill bit 1 is arranged in the limiting sleeve 21 and the front end of the spiral drill bit 1 partially extends out of the limiting sleeve 21. One end of the non-fixed connecting portion 22 of the limiting sleeve 21 can abut against the bone around the drill hole to play a supporting effect. The limiting sleeve 21 can provide axial limiting support for the spiral drill bit 1 during operation, effectively preventing the drill bit from drilling too deep and causing harm to the patient.

[0036] It also includes a liquid inlet channel 4 that passes through the drill rod 3, the connecting part 22 and the drill bit. It is a coolant injection channel and can be used for internal cooling of the spiral drill bit 1 during operation to avoid bone burns. A liquid outlet hole 41 is provided at the front end of the spiral drill bit 1, and the liquid outlet hole 41 is provided at the center of the front end of the spiral drill bit 1, so that the cooling effect can be better achieved.

[0037] Based on the above technical solution, a plurality of reverse spiral grooves 11 are provided and evenly distributed on the outer peripheral wall of the drill bit, which can provide more stable and efficient chip capacity and reduce resistance. For the same purpose, a plurality of cutting edges 12 are correspondingly provided and evenly distributed on the front end of the spiral drill bit 1. In this way, the front end of the spiral drill bit 1 is projected in the shape of a fan blade, and the liquid outlet 41 is located at the center of the fan blade to facilitate uniform liquid discharge and cooling. In a preferred embodiment, the height of the liquid outlet 41 is lower than the height of the cutting edge 12.

[0038] In order to effectively reduce the heat generated during the working process of the drill bit, at least one cooling port 212 is provided on the outer periphery of the limit sleeve 21 near the spiral drill bit 1. Of course, in a preferred embodiment, there are two cooling ports 212, which are symmetrically distributed on the peripheral wall of the limit sleeve 21.

[0039] In a preferred embodiment, the cutting edge 12 is in an inverted cone shape as a whole, so that when the spiral drill bit 1 cuts the bone, a conical bone disc can be formed and retained at the front end of the spiral drill bit 1 to provide protection for the sinus membrane.

[0040] Specifically, the limiting sleeve 21 is optionally provided with an elastic buckle 211, and the connecting part 22 is correspondingly provided with a matching slot 221. The limiting sleeve 21 is snapped into the slot 221 of the connecting part 22 through the elastic buckle 211 thereon to achieve buckle fit and fixation, which will enable the limiting sleeve 21 to provide axial limiting support for the operation of the spiral drill bit 1.

[0041] Preferably, the outer diameter of the spiral drill bit 1 decreases gradually from the rear end to the front end in a streamlined manner, which is more conducive to better advancement of the drill bit for drilling.

[0042] Furthermore, the circumferential diameter of the connecting portion 22 is larger than the circumferential diameter of the spiral drill bit 1, so that the connecting portion 22 can form a stop portion 22 after being connected to the spiral drill bit 1, which can effectively block debris and facilitate the precise axial limitation of the spiral drill bit 1 after the limit sleeve 21 is fixed, thereby reducing the possibility of the drill bit drilling too deep and causing harm to the patient.

[0043] On this basis, an annular boss 222 is optionally provided at one end of the connecting portion 22 connected to the drill rod 3, which has a similar function to the aforementioned stop portion 22 and can provide support for the limit sleeve 21 after it is fixed to the connecting portion 22, thereby preventing the elastic buckle 211 from falling out toward the drill rod 3.

[0044] More specifically, the end of the limiting sleeve 21 away from the connecting portion 22 is preferably provided with a circumferential protrusion 213, which not only strengthens the abutting end of the limiting sleeve 21 and the bone, but also increases the contact area between the limiting sleeve 21 and the bone, thereby playing a better supporting and limiting role.

[0045] In a preferred embodiment, a mounting portion 31 is provided at one end of the non-connecting limit portion 2 of the drill rod 3, which is used to connect to the corresponding drilling rig structure so that the drill bit can drill and perforate holes on the alveolar ridge. In a preferred embodiment, the cross-section of the mounting portion 31 is designed in an "I" shape.

[0046] The novel dental drill provided in this application has at least the following beneficial effects:

[0047] 1. The present invention uses a cutting edge to provide the main cutting and expanding function when the drill bit rotates at high speed. The front cutting edge is generally tooth-shaped or inverted-conical. When cutting bones, a conical bone disc is retained at the front end of the drill bit to protect the sinus membrane.

[0048] 2. The limit sleeve of this application provides precise axial limiting for the drill bit. Specifically, the limit sleeve is fixed in the card slot by an elastic buckle, which provides a stable axial limiting effect for the drill bit when working, and can better enhance the user experience.

[0049] 3. The reverse spiral groove of the present application can not only accommodate debris, but also reduce the resistance of the drill bit during operation, and at the same time can squeeze the hole wall to increase bone density. At the same time, the streamlined spiral drill bit with a gradually decreasing diameter can drill more efficiently and stably.

[0050] 4. The liquid inlet channel and the liquid outlet hole located at the center of the front end of the drill bit in this application can inject coolant during the operation of the drill bit to avoid bone burns. In addition, the design of the cooling port can effectively reduce the heat generated during the operation of the drill bit and achieve a better cooling effect.

[0051] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present application. These improvements and replacements should also be regarded as the scope of protection of the present application.

Claims

1. A new dental drill bit, characterized by: The invention comprises a drill rod, a stopper and a spiral drill bit connected in sequence, wherein the outer periphery of the spiral drill bit is provided with a reverse spiral groove, and the front end of the spiral drill bit is extended by the groove wall of the reverse spiral groove to form a tooth-shaped cutting edge; The limiting portion includes a sleeved limiting sleeve and a connecting portion, the two ends of the connecting portion are respectively connected to the drill rod and the spiral drill bit, the spiral drill bit is arranged in the limiting sleeve and the front end of the spiral drill bit partially extends out of the limiting sleeve, so that the limiting sleeve provides axial limitation for the spiral drill bit during operation; It also includes a liquid inlet channel running through the drill rod, the connecting portion and the spiral drill bit. The front end of the spiral drill bit is provided with a liquid outlet, and the liquid outlet is arranged at the center of the front end of the spiral drill bit.

2. A new dental drill according to claim 1, characterized in that: There are a plurality of reverse spiral grooves evenly distributed on the outer peripheral wall of the drill bit, and there are a plurality of corresponding cutting edges evenly distributed on the front end of the spiral drill bit.

3. A new dental drill according to claim 1, characterized in that: The cutting edge is in an inverted cone shape as a whole, so that when the spiral drill bit cuts the bone, a conical bone disc can be formed and retained at the front end of the spiral drill bit to provide protection for the sinus membrane.

4. A new dental drill according to claim 1, characterized in that: The limiting sleeve is provided with an elastic buckle, and the connecting portion is correspondingly provided with a matching slot. The limiting sleeve and the connecting portion are fixedly matched through the buckle, so that the limiting sleeve provides axial limitation for the operation of the spiral drill bit.

5. A new dental drill according to claim 1, characterized in that: The limiting sleeve is provided with at least one cooling opening on the outer periphery close to the spiral drill bit.

6. A new dental drill according to claim 1, characterized in that: The outer diameter of the spiral drill bit decreases gradually from the rear end to the front end in a streamlined manner.

7. A new dental drill according to claim 1, characterized in that: The circumferential diameter of the connecting portion is greater than the circumferential diameter of the spiral drill bit, so that the connecting portion forms a stop portion after being connected to the spiral drill bit.

8. The novel dental drill according to claim 1, characterized in that: An annular boss is provided on one end of the connecting portion connected to the drill rod.

9. The novel dental drill according to claim 1, characterized in that: The limiting sleeve is provided with a circumferential convex portion at one end away from the connecting portion.

10. The novel dental drill according to claim 1, characterized in that: An installation portion is provided at one end of the drill rod not connected to the limiting portion, and the cross-section of the installation portion is in the shape of an "I".

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