Integrated positioning and flattening synchronous drill bit for oral implant surgery

Abstract

The integrated positioning and flattening synchronous drill bit for the oral implanting operation comprises a shaft rod, a first drill body and a second drill body. One end of the first drill body is fixedly connected with one end of the shaft rod; one end of the second drill body is fixedly connected with the other end of the first drill body, the other end of the second drill body is provided with a conical structure, the shaft rod, the first drill body and the second drill body are coaxially and integrally arranged, the radial size of the shaft rod and the radial size of the second drill body are both smaller than that of the first drill body, and a plurality of cutting edges are formed at the other end of the first drill body. The multiple cutting edges are distributed on the other end face of the first drill body in a radial mode. The first drill body used for bone surface leveling and the second drill body used for positioning and drilling are integrated into the integrated drill bit, the multiple cutting edges on the first drill body can be used for synchronously finishing bone surface leveling operation around an implantation prepared hole when a positioning hole is drilled, and it is avoided that the drill bit is frequently replaced and the rotating speed is changed in an operation; and the operation accuracy and the convenience of subsequent repair operation are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, and specifically provides an integrated positioning, leveling and synchronous drill bit for oral implant surgery. Background Art

[0002] The first step in dental implant treatment is dental implant placement, which involves inserting a titanium dental implant into the jawbone. A specialized surgical drill is used to create a hole in the jawbone to accommodate the implant. The drill must be drilled into the anatomical area of ​​the implant restoration as planned, requiring high precision. Currently, the surgical drilling procedure for implant surgery follows a standardized process: first drilling a positioning hole, then expanding the hole, and finally drilling a forming hole. This results in the desired hole shape for placement or insertion of the implant.

[0003] However, when performing positioning drilling in oral implant surgery, the jaw bone surface is usually not flat. Common drill bits often encounter uneven or raised bone surface shapes, which can cause the drill bit to slip and push the drill bit to deviate, thereby causing the drilling position to shift, ultimately leading to the implant placement position shifting, seriously affecting the accuracy of the drilling position and increasing the risk of complications such as accidental nerve damage.

[0004] The drill bits in existing dental implant surgical instruments have a single function. In order to deal with the above situation, doctors need to replace drill bits with different functions to cooperate with the surgical treatment to locate the drilling and flatten the bone surface. This not only affects the accuracy of the operating room, but also increases the doctor's workload and the risk of postoperative repair. Utility Model Content

[0005] The utility model aims to solve the problem that the existing drill bit has a single function and cannot simultaneously meet the needs of positioning drilling and flattening bone surfaces in oral implant surgery.

[0006] The purpose of this utility model is to adopt the following technical solutions to achieve:

[0007] The utility model provides an integrated positioning and leveling synchronous drill bit for oral implant surgery, the drill bit comprising: a shaft; a first drill body, one end of which is fixedly connected to one end of the shaft, the first drill body having a cylindrical structure; and a second drill body, one end of which is fixedly connected to the other end of the first drill body, the other end of the second drill body having a conical structure; the shaft, the first drill body and the second drill body are coaxially arranged as a whole, the radial dimensions of the shaft and the second drill body are both smaller than the radial dimensions of the first drill body, the other end of the first drill body is constructed with a plurality of cutting edges, and the plurality of cutting edges are radially distributed on the other end face of the first drill body.

[0008] Preferably, the structure of the cutting edge includes a rake face, a flank face, a back face and a side face, the flank face is radially arranged along the end face of the first drill body, the rake face and the flank face intersect to form a cutting edge line, and the angle between the rake face and the central axis plane of the first drill body passing through the cutting edge line and / or the angle between the flank face and the radial plane of the first drill body is set to 6°-12°.

[0009] Preferably, in the axial direction of the first drill body, the side cutting surface is inclined toward the second drill body.

[0010] Preferably, the number of the cutting edges is not less than 8.

[0011] Preferably, the second drill body comprises a cylindrical segment, a prismatic segment and a pyramidal segment arranged in sequence, and one end of the cylindrical segment is fixedly connected to the other end of the first drill body.

[0012] Preferably, the cross section of the prism segment and the bottom surface of the pyramid segment are both regular polygons.

[0013] Preferably, the regular polygon is an equilateral triangle or a square.

[0014] Preferably, the diameter of the cylindrical segment is smaller than the diameter of the circumscribed circle of the cross section of the prism segment, and the shape and size of the bottom end face of the pyramid segment are the same as the shape and size of the cross section of the prism segment.

[0015] Preferably, the axial length of the first drill body is 10 mm-35 mm, and the diameter of the first drill body is 2.5 mm-4.8 mm.

[0016] Preferably, the axial length of the second drill body is 5-7 mm.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model discloses an integrated positioning and leveling synchronous drill bit for oral implant surgery, comprising a shaft, a first drill body, and a second drill body. One end of the first drill body is fixedly connected to one end of the shaft, and the first drill body has a cylindrical structure; one end of the second drill body is fixedly connected to the other end of the first drill body, and the other end of the second drill body has a conical structure. The shaft, the first drill body, and the second drill body are coaxially arranged as a whole, and the radial dimensions of the shaft and the second drill body are both smaller than the radial dimensions of the first drill body. The other end of the first drill body is constructed with multiple cutting edges, and the multiple cutting edges are radially distributed on the other end face of the first drill body. Through this arrangement, the first drill body for leveling the bone surface and the second drill body for positioning the hole are integrated into an integrated drill bit. While the doctor is drilling the positioning hole, the multiple cutting edges on the first drill body can simultaneously complete the bone surface leveling operation around the implant preparation hole while drilling the positioning hole. This avoids the need to frequently change drill bits and change rotation speed during surgery, reduces the doctor's labor intensity during surgery, and greatly improves surgical accuracy and the convenience of subsequent repair work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the drill bit of the present utility model;

[0020] Figure 2 This is a partial structural diagram of the first embodiment of the drill bit of the present utility model;

[0021] Figure 3 This is a partially enlarged schematic diagram of Example 1 2b of the drill bit of the present invention;

[0022] Figure 4 This is a partial structural diagram of the first embodiment of the drill bit of the present utility model;

[0023] Figure 5 Schematic diagram of the cross-sectional relationship between the prismatic section and the cylindrical section of the first embodiment of the drill bit of the present utility model;

[0024] Figure 6 This is a schematic diagram of the overall structure of the second embodiment of the drill bit of the present utility model;

[0025] Figure 7 This is a partial structural diagram of a second embodiment of the drill bit of the present utility model;

[0026] Figure 8 Schematic diagram of the cross-sectional relationship between the prismatic section and the cylindrical section of the second embodiment of the drill bit of the present utility model;

[0027] Figure 9 This is a schematic diagram of the overall structure of the third embodiment of the drill bit of the present utility model;

[0028] Figure 10 This is a schematic diagram of the working principle of the cutting edge of the drill bit of the utility model;

[0029] Figure 11 This is a schematic diagram of the drill bit of the utility model after drilling a hole in the jaw;

[0030] Figure 12 This is a schematic diagram of the processing and forming of the cutting edge of the utility model.

[0031] Figure markings: 1-shaft; 2-first drill body; 2a-cylindrical structure; 2b-cutting edge: 2b1-edge line; 2b2-flank face; 2b3-front face; 2b4-back ridge line; 2b5-back face; 2b6-spacer groove; 2b7-side face; 3-second drill body; 3a-pyramid section; 3b-prismatic section; 3c-cylindrical section; 3c1-residual cylindrical surface; 3d-first chamfer; 3e-rotation trajectory of cylindrical section; 3f-second chamfer; 3g-rotation trajectory of prismatic section; 4-cut material; 41-chips; 5-jaw; 5a-bone surface protrusion, 5b-positioning hole with scraping area; 5c-step structure; 6-machining tool; 7-tool axis; A-front angle; B-back angle; C-front cone angle; D-back cone angle; E-tool axis inclination angle. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0033] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, it should not be understood as limiting the utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance.

[0034] like Figure 1 and Figure 2 As shown, the integrated positioning and leveling synchronous drill bit for oral implant surgery of the present invention includes a shaft 1, a first drill body 2, and a second drill body 3. One end of the first drill body 2 is fixedly connected to one end of the shaft 1, and the first drill body 2 has a cylindrical structure 2a; one end of the second drill body 3 is fixedly connected to the other end of the first drill body 2, and the other end of the second drill body 3 has a conical structure. The shaft 1, first drill body 2, and second drill body 3 are coaxially arranged as a whole. The other end of the first drill body 2 is constructed with multiple cutting edges 2b, which are radially distributed on the other end surface of the first drill body 2. The radial dimensions of the shaft 1 and the second drill body 3 are both smaller than the radial dimensions of the first drill body 2.

[0035] The specific structure of the drill bit of the present utility model is described in detail below with reference to specific embodiments.

[0036] Example 1

[0037] like Figures 1 to 5 As shown, the drill bit of this embodiment comprises a coaxial, integrated shaft 1, a first drill body 2, and a second drill body 3. The first drill body 2 has a cylindrical structure 2a, with its upper end fixedly connected to the lower end of the shaft 1. The upper end of the second drill body 3 is fixedly connected to the lower end of the first drill body 2, and its lower end has a tapered structure. The shaft 1, first drill body 2, and second drill body 3 are coaxially integrated. The radial dimensions of the shaft 1 and the second drill body 3 are both smaller than those of the first drill body 2. The lower end of the first drill body 2 is formed with multiple cutting edges 2b, which are radially distributed on the other end surface of the first drill body 2. The number of cutting edges 2b is no less than eight. The axial length of the first drill body 2 ranges from 10 mm to 35 mm, and the diameter of the first drill body 2 ranges from 2.5 mm to 4.8 mm.

[0038] Specifically, the shaft 1 of the drill bit in this embodiment uses a standard ISO 1797 Type 1 rod for connecting to a dental handpiece. The "dental handpiece" here refers to a handheld power transmission device, one end of which is connected to a micro motor and the other end is connected to the shaft 1 of the drill bit. When the drill bit rotation axis is consistent with the motor axis, it is a "straight head handpiece". When the drill bit rotation axis and the motor axis form a certain angle, it is an "angled head handpiece". Each is suitable for different surgical occasions. For example, when performing implant surgery in the anterior teeth area, a straight head handpiece can be used. When performing zygomatic bone implant surgery, a straight head handpiece can also be used. However, implant surgery in the posterior teeth area requires the use of an angled head handpiece to perform drilling operations on the jaw 5.

[0039] like Figure 3 and Figure 10As shown, each cutting edge 2b of the first drill body 2 of this embodiment includes a rake face 2b3, a flank face 2b2, a back face 2b5, and a side face 2b7. The flank face 2b2 is radially arranged along the end face of the first drill body 2. The rake face 2b3 and the flank face 2b2 intersect to form a cutting edge line 2b1, and the flank face 2b2 and the back face 2b5 intersect to form a back edge line 2b4. The angle between the rake face 2b3 and the central axis plane of the first drill body 2 passing through the cutting edge line 2b1 is a rake angle A, and the angle between the flank face 2b2 and the radial plane of the first drill body 2 is a back angle B. Both rake angle A and back angle B are set to 6°-12°, resulting in a relatively sharp cutting edge structure. A spacing groove 2b6 is formed between the rake face 2b3 of one cutting edge 2b and the back face 2b5 of the adjacent cutting edge 2b. A plurality of flank surfaces 2b2 are radially arranged along the end surface of the first drill body 2 and are distributed in a radial pattern, and are arranged with the cutting edges 2b to form a ring-like tooth structure.

[0040] It should be noted that, depending on actual application, those skilled in the art may also set the rake angle A and clearance angle B to 0° for micro-shaving applications. When the first drill body 2 cuts the surface of the material 4 to be cut, the rake face 2b3 of the cutting edge 2b faces the portion of the material 4 to be cut, while the flank face 2b2 of the cutting edge 2b faces the portion of the material 4 already cut. Cutting debris from the material 4 is discharged through the spacing groove 2b6, thereby smoothing the surface of the material 4.

[0041] Continue reading Figure 1 、 Figure 2 as well as Figure 4 The second drill body 3 of this embodiment comprises a cylindrical segment 3c, a prismatic segment 3b, and a pyramidal segment 3a, arranged in sequence. The upper end of the cylindrical segment 3c is fixedly connected to the lower end of the first drill body 2. In this embodiment, the sum of the axial lengths of the cylindrical segment 3c, the prismatic segment 3b, and the pyramidal segment 3a, i.e., the axial length of the second drill body 3, is 5 mm to 7 mm.

[0042] like Figure 5 As shown, the cross-section of the prism segment 3b and the base of the pyramid segment 3a of the second drill body 3 are both square. The cross-sectional relationship between the prism segment 3b and the cylindrical segment 3c is as follows: the diameter of the cylindrical segment 3c is smaller than the diameter of the circumcircle of the prism segment 3b's cross-section and equal to the diameter of the incircle of the prism segment 3b's cross-section. The bottom end face of the pyramid segment 3a has the same dimensions as the cross-sectional shape of the prism segment 3b. A first chamfer 3d is provided on the end face of the prism segment 3b located on the side of the cylindrical segment 3c.

[0043] like Figure 5As shown, when the drill bit is in the working rotating state, the cylindrical section rotation trajectory 3e coincides with the inscribed circle of the square, and the prismatic section rotation trajectory 3g is the drill hole size, that is, the diameter of the cross-section circumscribed circle of the prism segment 3b is set to 0.2mm-0.5mm.

[0044] It is understood that when the dental handpiece drive shaft 1 drives the first drill body 2 and the second drill body 3 to rotate synchronously, the second drill body 3 drills into the jawbone 5, drilling the positioning hole through the pyramidal segment 3a, which then expands the positioning hole, while the cylindrical segment 3c limits the expansion of the positioning hole. That is, the cylindrical segment 3c within the positioning hole has no cutting function, thereby preventing radial vibration generated by the first drill body 2 when leveling the jawbone 5 surface and thus playing a lateral positioning role. In other words, the first drill body 2 for bone surface leveling and the second drill body 3 for positioning drilling are integrated into an integrated drill bit. While the surgeon is drilling the positioning hole, the multiple cutting edges 2b on the first drill body 2 can simultaneously complete the bone surface leveling operation around the implant preparation hole while drilling the positioning hole. This avoids the need for frequent drill bit changes and rotation speed changes during surgery, reduces the surgeon's labor intensity, and greatly improves the convenience of the surgery and subsequent repair work.

[0045] In addition, since the axial length of the second drill body 3 is fixed, the doctor does not need to pay attention to the depth scale on the high-speed rotating drill bit using traditional surgical methods, thereby reducing the doctor's surgical labor intensity.

[0046] Example 2

[0047] like Figure 6 、 Figure 7 as well as Figure 8 As shown, compared to the drill bit structure in Example 1, the cross-section of the prism segment 3b and the base of the pyramid segment 3a of the second drill body 3 in this embodiment are both equilateral triangles. The cross-sectional relationship between the prism segment 3b and the cylindrical segment 3c is as follows: the diameter of the cylindrical segment 3c is no greater than the diameter of the circumscribed circle of the prism segment 3b's cross-section, and the diameter of the cylindrical segment 3c is greater than the diameter of the inscribed circle of the prism segment 3b's cross-section. Furthermore, the prism segment 3b extends toward the cylindrical end to form three second chamfers 3f and three residual cylindrical surfaces 3c1.

[0048] like Figure 8 As shown, when the drill bit is in the working rotating state, the cylindrical section rotation trajectory 3e is located between the outer side of the inscribed circle of the equilateral triangle and the inner side of the circumscribed circle of the equilateral triangle, and the prismatic section rotation trajectory 3g is the size of the drill hole, that is, the diameter of the circumscribed circle of the cross section of the prism segment 3b is set to 0.2mm-0.5mm.

[0049] Compared with the drill bit structure of Example 1, the drill bit of this embodiment has a larger drilling cutting volume and higher drilling efficiency.

[0050] It should be noted that the other structures of this embodiment are completely consistent with the structure and principle of the drill bit in Example 1, and therefore will not be described in detail here.

[0051] Example 3

[0052] like Figure 9 As shown, compared to the drill bit structure of Example 1, the side cutting surfaces 2b7 of the cutting edges 2b in this embodiment are tilted toward the second drill body 3 in the axial direction of the first drill body 2, thereby forming a frustum structure on one side of the cylindrical structure 2a. In other words, the radial length of the flank surface 2b2 is smaller than the radial dimension of the cylindrical structure 2a.

[0053] like Figure 11 As shown, the surface of the mandible 5 includes a plurality of different bone surface protrusions 5a. Compared with the drill bit structures of Examples 1 and 2, the drill bit of this embodiment uses the side cutting edge 2b7 of the cutting edge 2b of the second drill body 3 to expand the flat and uneven bone surface on the surface of the mandible 5 toward the bone surface protrusion 5a to form a positioning hole 5b with a scraping area. The step structure 5c is located on one side of the bone surface protrusion 5c to form a transition slope structure, thereby achieving the control of the bone surface platform to an appropriate size.

[0054] It should be noted that the other structures of this embodiment are completely consistent with the structure and principle of the drill bit in Example 1, and therefore, they will not be described here in detail.

[0055] In the above-mentioned embodiments 1 to 3, Figure 12 As shown, the rake angle A and clearance angle B on the first drill body 2 of the drill bit are achieved using a machining tool 6. The machining tool 6 comprises a grinding wheel or a disc milling cutter. The machining tool 6 is fixed to a cutter shaft 7. The grinding wheel or disc milling cutter of the machining tool 6 has an asymmetric conical disc structure. The front cone angle C of the conical disc structure is controlled between 6° and 10°, and the rear cone angle D of the conical disc structure is controlled between 15° and 20°. The tool axis inclination angle E, which is the angle between the central axis of the conical disc structure and the central axis of the drill bit, is controlled between 55° and 65°. The machining tool 6 directly forms the rake face 2b3 and the back face 2b5 by machining the end face of the cylindrical structure 2a of the first drill body 2. The cutting edge line 2b1 and the back edge line 2b4 of the resulting cutting edge 2b are both straight or approximately straight and parallel or approximately parallel. The back face 2b2 can be formed separately by milling with an end mill or grinding with a grinding wheel.

[0056] Furthermore, it should be noted that the cylindrical section 3c of the first drill body 2 acts as an "overrun groove" during the machining phase. "Overrun groove" is a term used in machining technology. The purpose of providing an "overrun groove" on a component is to allow the machining tool 6 to penetrate this groove (but not to the bottom of the groove) to facilitate chip breaking and root cleaning. (Note: "Chip breaking" refers to the natural breaking and separation of chips 41 from the machined part by the machining tool 6 when it exits the overrun groove, while "root cleaning" refers to the machining of a shape with regular, clear edges.) Therefore, the provision of the cylindrical section 3c on the first drill body 2 of the drill bit of the present invention can also be used during the machining phase to prevent damage to the second drill body 3 when shaping the cutting edge 2b.

[0057] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. An integrated positioning and leveling synchronous drill bit for oral implant surgery, characterized in that: include: Axle (1); a first drill body (2), one end of which is fixedly connected to one end of the shaft (1), and the first drill body (2) has a cylindrical structure (2a); as well as a second drill body (3), one end of which is fixedly connected to the other end of the first drill body (2), and the other end of the second drill body (3) has a cone-shaped structure; The shaft (1), the first drill body (2) and the second drill body (3) are coaxially arranged in an integrated manner; the radial dimensions of the shaft (1) and the second drill body (3) are both smaller than the radial dimensions of the first drill body (2); a plurality of cutting edges (2b) are constructed on the other end of the first drill body (2); and the plurality of cutting edges (2b) are radially distributed on the other end surface of the first drill body (2).

2. The integrated positioning and leveling synchronous drill bit for oral implant surgery according to claim 1, characterized in that: The structure of the cutting edge (2b) comprises a rake face (2b3), a flank face (2b2), a back face (2b5) and a side face (2b7); the flank face (2b2) ​​is radially arranged along the end face of the first drill body (2); the rake face (2b3) and the flank face (2b2) ​​intersect to form a cutting edge line (2b1); the angle between the rake face (2b3) and a central axis plane of the first drill body (2) passing through the cutting edge line (2b1) and / or the angle between the flank face (2b2) ​​and a radial plane of the first drill body (2) is set to 6°-12°.

3. The integrated positioning and leveling synchronous drill bit for oral implant surgery according to claim 2, characterized in that: In the axial direction of the first drill body (2), the side cutting surface (2b7) is arranged to be inclined toward the second drill body (3).

4. The integrated positioning and leveling synchronous drill bit for oral implant surgery according to claim 1, characterized in that: The number of the cutting edges (2b) is no less than 8.

5. The integrated positioning and leveling synchronous drill bit for oral implant surgery according to claim 1, characterized in that: The second drill body (3) comprises a cylindrical section (3c), a prism section (3b) and a pyramid section (3a) arranged in sequence, and one end of the cylindrical section (3c) is fixedly connected to the other end of the first drill body (2).

6. The integrated positioning and leveling synchronous drill bit for oral implant surgery according to claim 5, characterized in that: The cross section of the prism segment (3b) and the bottom surface of the pyramid segment (3a) are both regular polygons.

7. The integrated positioning and leveling synchronous drill bit for oral implant surgery according to claim 6, characterized in that: The regular polygon is an equilateral triangle or a square.

8. The integrated positioning and leveling synchronous drill bit for oral implant surgery according to claim 6, characterized in that: The diameter of the cylindrical segment (3c) is smaller than the diameter of the circumscribed circle of the cross section of the prism segment (3b), and the shape and size of the bottom end face of the pyramid segment (3a) are the same as the cross-sectional shape and size of the prism segment (3b).

9. The integrated positioning and leveling synchronous drill bit for oral implant surgery according to claim 1, characterized in that: The axial length of the first drill body (2) is 10 mm to 35 mm, and the diameter of the first drill body (2) is 2.5 mm to 4.8 mm.

10. The integrated positioning and leveling synchronous drill bit for oral implant surgery according to claim 1, characterized in that: The axial length of the second drill body (3) is 5-7 mm.

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