A new hollow bone drill

Abstract

The utility model discloses a novel hollow bone taking drill, handle end, handle end side fixed connection's bone taking end, bone taking end outer extension end fixed connection's working end: working end, including bone taking end side fixed connection's cutting ring, the drill bit mouth of cutting ring bottom end setting, four groups of side edges that cutting ring outer wall has set up, are used for draining cooling water to working end, can be through the spiral side edge and the recess that set up in working end side wall, drain cooling water high efficiency to entire cutting surface, improve the heat dissipation effect significantly, avoid the burn of tissue, simultaneously, side edge auxiliary end blade mouth carries out cutting, has greatly promoted the cutting efficiency, the annular step of bone taking end internal cavity setting, forms the slight gap after the bone column enters, effectively avoids the vacuum adsorption, makes the bone column be taken out easily and completely, thereby realized safe, efficient, convenient bone taking operation.

Description

Technical Field

[0001] This utility model relates to the field of dental medical equipment technology, and in particular to a novel hollow bone harvesting drill. Background Technology

[0002] Hollow bone harvesting drills are commonly used dental medical devices. Their core is a hollow tubular structure, which is used in conjunction with a power system. They are mainly used in dental implant and bone augmentation surgeries. They can precisely drill holes in the patient's autologous or allogeneic bone, and collect bone tissue through the hollow channel to reduce bone damage. They combine drilling and bone collection functions to ensure surgical efficiency and bone tissue utilization, making them a key tool for dental bone-related surgeries.

[0003] As people's living standards improve, the market demands for products become increasingly stringent. Traditional bone-removing drills, due to their smooth working end design, make it difficult for cooling water to penetrate to the core area. The heat generated by high-speed rotation cannot be effectively dissipated, posing a risk of overheating and burning tissue. In addition, the internal cavity has a straight-through structure. Once cylindrical bone tissue and bone fragments enter, the smooth inner wall of the cavity can easily create local negative pressure, making it difficult to remove bone tissue and bone fragments, causing great trouble for doctors in actual operation. Utility Model Content

[0004] This invention provides a novel hollow bone extraction drill to solve the above-mentioned problems.

[0005] This utility model provides a novel hollow bone harvesting drill, comprising a handle end, a bone harvesting end fixedly connected to the side of the handle end, and a working end fixedly connected to the outer extension end of the bone harvesting end. The working end includes a cutting ring fixedly connected to the side of the bone harvesting end, a drilling cutting edge set at the bottom of the cutting ring, and four sets of side cutting edges opened on the outer wall of the cutting ring, which are used to guide cooling water to the working end.

[0006] In a novel hollow bone-removing drill according to one embodiment of the present invention, the cutting ring is cylindrical, and the drilling cutting edge is arranged in a circumferential array along the bottom end of the cutting ring and is inclined to one side.

[0007] In a novel hollow bone-harvesting drill according to one embodiment of the present invention, the working end of the side cutting edge has the same shape as the drilling cutting edge, the side cutting edge has a spiral groove with a depth of 0.5 to 1.0 mm, and the side cutting edge extends to the outer wall of the bone-harvesting end.

[0008] In a novel hollow bone-harvesting drill according to an embodiment of the present invention, the bone-harvesting end includes a bone-storing cavity, a conical cavity, and a side opening. The interior of the bone-storing cavity is hollow, and side openings are provided on both sides of the bone-storing cavity. A conical cavity is provided at the top of the inner wall of the bone-storing cavity.

[0009] In a novel hollow bone-harvesting drill according to one embodiment of the present invention, an annular step is provided at the connection between the bone-harvesting end and the working end, and the width of the annular step is 0.5mm.

[0010] In a novel hollow bone-harvesting drill according to one embodiment of the present invention, the conical cavity is conical in shape, and the bottom end of the conical cavity is flush with the side of the side opening.

[0011] In a novel hollow bone-harvesting drill according to one embodiment of the present invention, one end of an extension rod is fixedly connected to the side of the bone storage cavity, and the other end of the extension rod is fixedly connected to a connecting block.

[0012] The technical solution provided in this application embodiment may include the following beneficial effects: This application designs a novel hollow bone-harvesting drill, which can efficiently guide cooling water to the entire cutting surface by opening a spiral side cutting edge and groove on the side wall of the working end, significantly improving the heat dissipation effect and avoiding tissue burns. At the same time, the side cutting edge assists the end cutting edge in cutting, greatly improving the cutting efficiency. The annular step set in the internal cavity of the bone-harvesting end forms a fine gap after the bone column enters, effectively avoiding vacuum adsorption, so that the bone column can be easily and completely removed, thereby realizing a safe, efficient and convenient bone-harvesting operation.

[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a novel hollow bone-harvesting drill provided in one embodiment of this application; Figure 2 yes Figure 1 A partial split view; Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure; Figure 4 yes Figure 3 Enlarged view of part A of the structure.

[0016] Explanation of reference numerals in the attached figures: 1. Handle end; 11. Extension rod; 12. Connecting block; 2. Bone harvesting end; 21. Bone storage cavity; 22. Conical cavity; 23. Side opening; 3. Working end; 31. Cutting ring; 32. Drilling edge; 33. Side cutting edge. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] like Figures 1 to 4 As shown, this application provides a novel hollow bone harvesting drill, comprising: a handle end 1, a bone harvesting end 2 fixedly connected to the side of the handle end 1, and a working end 3 fixedly connected to the outer end of the bone harvesting end 2, characterized in that: The working end 3 includes a cutting ring 31 fixedly connected to the side of the bone harvesting end 2, a drilling cutting edge 32 provided at the bottom of the cutting ring 31, and four sets of side cutting edges 33 opened on the outer wall of the cutting ring 31, which are used to guide cooling water to the working end.

[0021] With the above technical solution, when the handle end 1 is driven to rotate at high speed by the dental handpiece, the entire working end 3 rotates accordingly. The drilling edge 32, as the main cutting edge, first contacts and cuts into the bone tissue, completing the circumferential cut and forming a circular bone incision. At the same time, the side edge 33 is not a simple groove, but a helical edge with cutting ability. During the rotation, it performs synchronous, longitudinal "planing" cuts on the side wall of the cylindrical bone tissue that has been circumferentially cut by the drilling edge 32. This greatly reduces the resistance when advancing only by the end edge and improves the cutting efficiency, especially suitable for hard bone.

[0022] Meanwhile, after the cooling water is sprayed out from the phone, it flows along the surface of the drill body. The four sets of spiral side cutting edges 33 form a continuous guide channel from the bone-taking end 2 to the very end of the working end 3. Under the centrifugal force and capillary action generated by the rotation, the cooling water is efficiently guided to the entire outer surface of the working end 3 and penetrates deep into the cutting interface, directly carrying away a large amount of heat generated by the friction between the drilling cutting edge 32 and the side cutting edge 33 and the bone tissue, effectively avoiding the risk of bone tissue burns caused by excessive local temperature.

[0023] In one alternative embodiment, the cutting ring 31 is cylindrical, and the drilling edges 32 are arranged in a circumferential array along the bottom end of the cutting ring 31 and are inclined to one side.

[0024] The cylindrical cutting ring 31 ensures that the cut bone column has a regular shape and precise dimensions. The drilling cutting edge 32 adopts a circumferential array and is inclined to one side, that is, it has a cutting edge inclination angle. When it rotates and cuts, it acts like a milling cutter, which is a continuous shearing process rather than an impact-type chisel. Therefore, the cutting is more stable and sharp, with less vibration. When the inclined cutting edge enters the bone tissue, it can better guide the bone fragments upward and remove them, reduce the accumulation of bone fragments at the cutting edge, keep the cutting edge clean and maintain continuous cutting ability.

[0025] In an optional embodiment, the working end of the side cutting edge 33 is consistent with the shape of the drilling cutting edge 32, the side cutting edge 33 has a spiral groove with a depth of 0.5 to 1.0 mm, and the side cutting edge 33 extends to the outer wall of the bone harvesting end 2.

[0026] The shape of the working end of the side cutting edge 33 is consistent with that of the drilling cutting edge 32, ensuring the continuity of the cutting action. The transition from the end to the side is smooth, with low cutting resistance. The spiral design ensures that there is always a cutting edge in contact with bone tissue during continuous rotation, resulting in uniform cutting force. The spiral shape also forms a "screw" type conveying channel, which generates an upward conveying force during rotation. On the one hand, it pumps the cooling water downward to the working end, and on the other hand, it discharges some of the generated bone chips upward along the groove to the working area to prevent blockage. The extension to the outer wall of the bone harvesting end 2 ensures that the cooling water drainage path is long enough to start collecting and guiding the cooling water from the part near the handle, achieving full-process cooling and chip removal.

[0027] In an optional embodiment, the bone harvesting end 2 includes a bone storage cavity 21, a conical cavity 22, and a side opening 23. The interior of the bone storage cavity 21 is hollow, and the side openings 23 are provided on both sides of the bone storage cavity 21. The conical cavity 22 is provided at the top of the inner wall of the bone storage cavity 21.

[0028] The bone storage cavity 21 is the core space for accommodating the cut cylindrical bone column. Its hollow design ensures that there is enough volume to store the bone column. The side opening 23 serves as an observation window, allowing doctors to directly see whether the bone column has successfully entered the cavity and to what depth. At the same time, it serves as an additional chip removal channel, from which some bone chips and cooling water can be discharged, reducing the blockage pressure inside the cavity and increasing communication between the cavity and the external environment, thus breaking any possible vacuum adsorption effect.

[0029] In an optional embodiment, an annular step is provided at the connection between the bone harvesting end 2 and the working end 3, and the width of the annular step is 0.5 mm.

[0030] Traditional bone retrieval drills do not have this annular step. When the bone column is cut and pushed into the bone storage cavity 21, without this step, the outer wall of the bone column may form a tight fit with the inner wall of the bone storage cavity 21, creating a vacuum or negative pressure, leading to a "jamming" phenomenon and making it difficult to remove. By setting a tiny step, 0.5mm wide, after the bone column is fully inserted into the bone storage cavity 21, a tiny annular gap is formed between its bottom and the step. This gap ensures that external air and cooling water can enter, balancing the internal and external pressures and completely eliminating the vacuum suction force, allowing the bone column to be easily pushed back or removed with instruments.

[0031] In an alternative embodiment, the conical cavity 22 is conical, and the bottom end of the conical cavity 22 is flush with the side of the side opening 23.

[0032] The conical design provides a smooth transition from the bone storage cavity 21 to the connecting rod 11, avoiding stress concentration caused by right angles or sharp angles and improving structural strength. The bottom end is flush with the side of the side opening 23, allowing the upper edge of the side opening 23 to directly connect with the widest part of the conical cavity 22. This maximizes the function of the side opening 23. When the bone column moves upward to the top, any excess bone fragments or fluid can be smoothly drained through the side opening 23 without accumulating in the corners of the conical cavity 22, ensuring a clean and smooth removal process.

[0033] In an optional embodiment, one end of an extension rod 11 is fixedly connected to the side of the bone storage cavity 21, and the other end of the extension rod 11 is fixedly connected to a connecting block 12.

[0034] The handle end 1 serves as the power transmission structure for the entire drill bit. The extension rod 11 provides the necessary length to ensure that the doctor has enough operating space and avoids the handpiece head obstructing the view or interfering with the operation. The connecting block 12 is a standardized interface for quick and stable connection to the dental handpiece, receiving the rotational power and torque from the handpiece. The entire transmission path is: handpiece → connecting block 12 → extension rod 11 → bone harvesting end 2 → working end 3, ensuring that the power is transmitted to the cutting area efficiently and without loss.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A novel hollow bone-harvesting drill, comprising a handle end (1), a bone-harvesting end (2) fixedly connected to the side of the handle end (1), and a working end (3) fixedly connected to the outer end of the bone-harvesting end (2), characterized in that: The working end (3) includes a cutting ring (31) fixedly connected to the side of the bone-taking end (2), a drilling cutting edge (32) set at the bottom of the cutting ring (31), and four sets of side cutting edges (33) opened on the outer wall of the cutting ring (31) for guiding cooling water to the working end.

2. The novel hollow bone-harvesting drill according to claim 1, characterized in that, The cutting ring (31) is cylindrical, and the drilling cutting edge (32) is arranged in a circumferential array along the bottom end of the cutting ring (31) and is inclined to one side.

3. The novel hollow bone-harvesting drill according to claim 1, characterized in that, The working end of the side cutting edge (33) is consistent with the shape of the drilling cutting edge (32). The side cutting edge (33) has a spiral groove with a depth of 0.5 to 1.0 mm and extends to the outer wall of the bone harvesting end (2).

4. A novel hollow bone-harvesting drill according to claim 1, characterized in that, The bone harvesting end (2) includes a bone storage cavity (21), a conical cavity (22), and a side opening (23). The interior of the bone storage cavity (21) is hollow, and the two sides of the bone storage cavity (21) are provided with side openings (23). The top of the inner wall of the bone storage cavity (21) is provided with a conical cavity (22).

5. A novel hollow bone-harvesting drill according to claim 1, characterized in that, An annular step is provided at the connection between the bone harvesting end (2) and the working end (3), and the width of the annular step is 0.5 mm.

6. A novel hollow bone-harvesting drill according to claim 4, characterized in that, The conical cavity (22) is conical, and the bottom end of the conical cavity (22) is flush with the side of the side opening (23).

7. A novel hollow bone-harvesting drill according to claim 4, characterized in that, One end of an extension rod (11) is fixedly connected to the side of the bone storage cavity (21), and the other end of the extension rod (11) is fixedly connected to a connecting block (12).

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