Six-bladed ball bone drill

Abstract

The utility model discloses a kind of six-leaf spherical bone drill, it is related to medical instrument field, wherein, six-leaf spherical bone drill includes: front end spherical tool bit, middle straight rod body and rear end limiting connection structure composition, wherein, the front end spherical tool bit includes six-leaf helical cutting edge, the structure of helical cutting edge is spherical helix structure;The diameter of the front end spherical tool bit is D1, wherein, 1.60mm≤D1≤4.40mm;The helix angle of six-leaf helical cutting edge set in the front end spherical tool bit is angle1, wherein, 27°≤angle1≤33°;Six-leaf spherical bone drill provided by the utility model is used for the bone in fresh tooth extraction nest, uneven alveolar ridge top to take out bone mud can be used in periodontal surgery to cover exposed tooth root, assist tooth firmness;The bone mud removed can be used in implant surgery to increase, widen in operation area, cover exposed implant surface, improve the survival rate of implant.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a six-lobed spherical bone harvesting drill. Background Technology

[0002] As clinical requirements for bone volume and quality in dental implant surgery become increasingly stringent, traditional bone harvesting tools such as single-blade spiral drills and spoon drills have limitations in terms of cutting ability, bone paste extraction efficiency, and ease of operation. Especially when performing high-precision bone sample extraction in confined oral spaces, existing instruments often struggle to balance rigidity and miniaturized design.

[0003] Therefore, there is an urgent need for a new type of dental medical device with a compact structure, high cutting efficiency, and strong bone removal capability, for tooth extraction socket preparation, implant bed preparation, and bone removal, in order to meet the needs of oral surgery and clinical sampling. Utility Model Content

[0004] One of the technical problems to be solved by this utility model embodiment is how to provide a six-bladed spherical bone-harvesting drill that is scientifically structured, precisely machined, highly efficient, safe and reliable to solve the problems existing in the prior art.

[0005] In conjunction with the first aspect, this utility model provides a six-bladed spherical bone-harvesting drill, comprising: a front spherical cutter head, a middle straight rod body, and a rear limiting connection structure.

[0006] The front-end spherical cutter head includes a six-bladed helical cutting edge, and the structure of the helical cutting edge is a spherical helical structure.

[0007] The diameter of the front-end spherical cutter head is D1, wherein 1.60mm≤D2≤4.40mm;

[0008] The helix angle of the six-bladed spiral cutting edge of the front ball-shaped cutter head is angle1, where 27°≤angle1≤33°.

[0009] Optionally, the diameter of the front-end spherical cutter head is 2.00mm, 3.00mm, or 4.00mm.

[0010] The machining accuracy is 0.01 mm, and the error range is controlled between 0.005 mm and 0.01 mm.

[0011] Optionally, when the diameter D1 of the front ball cutter head is 2.00 mm, the depth of the six-bladed spiral cutting edge of the front ball cutter head is h21, wherein 0.39 mm ≤ h21 ≤ 0.61 mm.

[0012] Optionally, when the diameter D1 of the front ball cutter head is 3.00 mm, the depth of the six-bladed spiral cutting edge of the front ball cutter head is h22, wherein 0.69 mm ≤ h22 ≤ 0.91 mm.

[0013] Optionally, when the diameter D1 of the front ball cutter head is 4.00 mm, the depth of the six-bladed spiral cutting edge of the front ball cutter head is h23, wherein 0.80 mm ≤ h23 ≤ 1.05 mm.

[0014] Optional features include: six helical cutting edges symmetrically distributed to enhance bone slime extraction capabilities.

[0015] Optionally, the length of the central straight rod is H1 and the diameter is D2, wherein 25.00mm≤H1≤40.00mm and 2.00mm≤D2≤2.50mm.

[0016] Optional features include: the length of the central straight rod is H1, which is 26.69 mm.

[0017] Optionally, the length of the middle straight rod is H1, which is 35.40 mm.

[0018] Optionally, the length of the middle straight rod is H1, which is 27.40 mm.

[0019] Optionally, the length of the middle straight rod is H1, which is 34.69 mm.

[0020] Optionally, the length of the middle straight rod is H1, which is 27.58 mm.

[0021] Optionally, the diameter D2 of the central straight rod is 2.35 mm.

[0022] Optionally, the central straight rod is provided with scale lines for determining the surgical depth of the front spherical blade during use.

[0023] Optionally, the distance between the scale lines on the central straight rod body is 1.00mm-4.00mm.

[0024] Optionally, a scale line is set on the middle straight rod at a distance of 2mm or 3mm, and the positional error range of the scale line is ±0.1mm.

[0025] Optionally, the scale depth is 0.01-0.20mm.

[0026] Optionally, the scale lines are raised, with a height of 0.01-0.20 mm.

[0027] Optionally, the rear-end limiting connection structure consists of a first-step column section, a second-step column section, and a tapered chamfered section.

[0028] Optional features include: the length of the rear limit connection structure is 2.70 mm.

[0029] Optional features include: the front ball-shaped cutter head, the middle straight rod body, and the rear limiting connection structure are all integrally molded and made of special metal or titanium alloy to ensure corrosion resistance and high strength.

[0030] This utility model provides a six-bladed spherical bone harvesting drill for harvesting bone from fresh tooth extraction sockets and uneven alveolar ridges. The harvested bone paste can be used in periodontal surgery to cover exposed tooth roots and aid in tooth stabilization; it can also be used in implant surgery to raise and widen the surgical area, cover the exposed implant surface, and improve implant survival rate. The six-bladed spherical bone harvesting drill has a sharp and precise tip structure, resulting in high cutting efficiency and enabling precise grinding in a short time, significantly improving clinical operation efficiency. The overall structure is made of special steel, which is strong and wear-resistant, maintaining excellent performance even after long-term use, and ensuring stable and reliable quality. Its slim and agile design allows for flexible operation and precise access to deep and narrow areas of the oral and maxillofacial bone, improving treatment accuracy. This not only improves the comfort of the dentist but also effectively reduces patient discomfort and enhances the treatment experience. Due to the precise focus of bone grinding, it can promote osseointegration in specific areas, improving the success rate of implant and periodontal surgeries.

[0031] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0032] The accompanying drawings, which form part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0033] The present invention can be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0034] Figure 1 This diagram shows a three-dimensional view of a six-bladed spherical bone-harvesting drill according to an embodiment of the present invention.

[0035] Figure 2 This diagram shows a three-dimensional view of a six-bladed spherical bone-harvesting drill according to another embodiment of the present invention.

[0036] Figure 3 This image shows a side view of a six-bladed spherical bone-harvesting drill according to an embodiment of the present invention.

[0037] Figure 4 The image shows a front view of the front spherical cutter head of a six-bladed spherical bone-harvesting drill according to an embodiment of the present invention. Detailed Implementation

[0038] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0039] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0040] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0041] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0043] This invention can be applied to computer systems / servers that can operate with a wide range of other general-purpose or special-purpose computing system environments or configurations. Examples of well-known computing systems, environments, and / or configurations suitable for use with computer systems / servers include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputer systems, mainframe computer systems, and distributed cloud computing environments that include any of the above systems, etc.

[0044] Computer systems / servers can be described in the general context of computer system executable instructions (such as program modules) executed by the computer system. Typically, program modules can include routines, programs, object programs, components, logic, data structures, etc., which perform specific tasks or implement specific abstract data types. Computer systems / servers can be implemented in distributed cloud computing environments, where tasks are performed by remote processing devices linked through a communication network. In distributed cloud computing environments, program modules can reside on local or remote computing system storage media, including storage devices.

[0045] Figure 1 This diagram shows a three-dimensional view of a six-bladed spherical bone-harvesting drill according to an embodiment of the present invention. Figure 2This diagram shows a three-dimensional view of a six-bladed spherical bone-harvesting drill according to another embodiment of the present invention. Figure 3 This diagram shows a side view of a six-bladed spherical bone-harvesting drill according to an embodiment of the present invention. Figure 4 This diagram shows a front view of the front spherical cutter head 11 of a six-bladed spherical bone-harvesting drill according to an embodiment of the present invention, as shown below. Figure 1-4 As shown, the six-bladed spherical bone-harvesting drill comprises: a front spherical cutter head, a middle straight rod body, and a rear limiting connection structure. The front spherical cutter head includes six helical cutting edges with a spherical helical structure. The diameter of the front spherical cutter head is D1, where 1.60mm ≤ D2 ≤ 4.40mm. The helical angle of the six helical cutting edges on the front spherical cutter head is angle1, where 27° ≤ angle1 ≤ 33°.

[0046] In one specific implementation, the diameter of the front ball cutter head 11 is 2.00mm, 3.00mm or 4.00mm (the machining error is preferably ±0.08mm, and most preferably ±0.01mm).

[0047] In a specific implementation, the diameter of the ball-shaped scalpel tip is controlled between 1.60mm and 4.40mm. Different specifications are suitable for different bone structures, especially for minimally invasive interventions in narrow anatomical areas or pediatric orthopedics. The straight rod connecting the middle is a rigid metal rod with a length between 25.00mm and 40.00mm and a diameter controlled between 2.00mm and 2.50mm. This ensures stable force transmission during operation and facilitates the passage of various surgical cannulas and instrument guiding systems.

[0048] In a specific implementation, a limiting connection structure is provided at the rear end for connecting to the surgical instrument handle, drive device, or navigation system. Common forms include limiting discs or rotary interfaces, preventing instruments from slipping or being inserted too deeply during surgery, thus improving overall surgical safety and operational precision. Furthermore, this instrument structure facilitates standardized production and high-temperature, high-pressure sterilization, and can also be customized into a single-use version.

[0049] This novel six-bladed spherical bone-harvesting drill features minimally invasive design, high adaptability, and clear operational feedback, significantly improving intraoperative efficiency and postoperative patient recovery. The unique design of its spherical spiral structure also provides a foundation for future optimization and expansion of intelligent surgical instruments.

[0050] In a specific implementation, a limiting connection structure is provided at the rear end for connecting to the surgical instrument handle, drive device, or navigation system. Common forms include limiting discs or rotary interfaces, preventing instruments from slipping or being inserted too deeply during surgery, thus improving overall surgical safety and operational precision. Furthermore, this instrument structure facilitates standardized production and high-temperature, high-pressure sterilization, and can also be customized into a single-use version.

[0051] This novel six-bladed spherical bone harvesting drill features minimally invasive design, high adaptability, great flexibility, high bone release efficiency, and clear operational feedback, significantly improving intraoperative efficiency and postoperative patient recovery. The unique design of its spherical spiral structure also provides a foundation for future optimization and expansion of intelligent assisted surgical instruments.

[0052] In one embodiment, the front-end spherical cutter head 11 adopts a six-bladed helical cutting edge 111 structure. The six cutting edges are symmetrically distributed on the spherical surface, that is, the included angle between any two adjacent helical cutting edges 111 is approximately 30°. This symmetry not only helps maintain the cutting balance of the cutter head when advancing in bone tissue, but also significantly improves the stability and efficiency of the spherical head during multi-directional displacement. This six-bladed symmetrical structure is particularly suitable for operations requiring frequent rotation and gentle advancement, and can effectively disturb or scrape bone paste without damaging the surrounding bone structure, thereby improving the overall efficiency of bone channel formation or bone paste extraction.

[0053] Furthermore, to optimize the interaction angle between cutting performance and bone tissue, the helical angle angle1 of the six-bladed helical cutting edge 111 is controlled between 27° and 33°, such as 27°, 28°, 29°, 31°, 32°, and 33°. Experiments have shown that within this range, the cutting head has a more suitable bite angle when entering the cancellous bone region, providing good cutting force without causing bone debris blockage or cutting head obstruction due to excessive angle. The selection of this angle comprehensively considers multiple factors such as cutting depth, torque transmission, and bone hardness, and is particularly suitable for dense bone regions such as the vertebral body and proximal femur.

[0054] Specifically, a clinically used six-bladed spiral spherical bone harvesting drill has a spherical cutting head 11 with a diameter of 3.00 mm. The outer surface of the cutting head has six evenly spaced spiral cutting edges, with the spiral lines evenly spread across the spherical surface and extending in a spiral direction, with a spiral angle of 30°. The central straight rod 12 has a length of 34.69 mm and a diameter of 2.35 mm, and is made of medical-grade special steel.

[0055] In one implementation, when the diameter D1 of the front-end spherical blade 11 is 2.00 mm, the depth of the six-bladed helical cutting edge 111 of the front-end spherical blade 11 is h21, where 0.39 mm ≤ h21 ≤ 0.61 mm. Specifically, it can be 0.50 mm, 0.51 mm, 0.49 mm, etc. This range ensures that basic bone tissue cutting and disturbance capabilities are still available even in minimally invasive situations, while not increasing the risk of blade breakage due to structural weakening. It is suitable for delicate operations in implant sites with small bones or in areas surrounding nerves.

[0056] In one implementation, when the diameter D1 of the front ball cutter head 11 is 3.00 mm, the depth of the six-bladed spiral cutting edge 111 of the front ball cutter head 11 is h22, wherein 0.69 mm ≤ h22 ≤ 0.91 mm; specifically, it can be 0.80 mm, 0.81 mm, 0.79 mm, etc.

[0057] In one implementation, when the diameter D1 of the front ball head 11 is 4.00 mm, the depth of the six-bladed spiral cutting edge 111 of the front ball head 11 is h23, wherein 0.80 mm ≤ h23 ≤ 1.05 mm, and specifically it can be 1.00 mm, 1.01 mm, 0.99 mm, 0.95 mm, etc.

[0058] In one embodiment, the length of the middle straight rod 12 is H1, which is 26.69 mm, and the diameter of the front ball-shaped cutter head 11 is 3.00 mm.

[0059] In one embodiment, the length of the middle straight rod 12 is H1, which is 35.40 mm, and the diameter of the front ball-shaped cutter head 11 is 2.00 mm.

[0060] In one embodiment, the length of the middle straight rod 12 is H1, which is 27.40 mm, and the diameter of the front ball-shaped cutter head 11 is 2.00 mm.

[0061] In one embodiment, the length of the middle straight rod 12 is H1, which is 34.69 mm, and the diameter of the front ball-shaped cutter head 11 is 3.00 mm.

[0062] In one embodiment, the length of the central straight rod 12 is H1, which is 27.58 mm, and the diameter of the front ball-shaped cutter head 11 is 4.00 mm.

[0063] The machining accuracy of the central straight rod 12 in the axial length direction is controlled within ±0.1mm, preferably controlled to 0.01mm.

[0064] In one embodiment, the diameter D2 of the central straight rod 12 is 2.35 mm.

[0065] In one embodiment, the length of the rear limiting connection structure 13 is h3, wherein 2.00mm≤h3≤3.00mm; preferably, the total length of the rear limiting connection structure 13 is 2.70mm.

[0066] In one embodiment, the rear limiting connection structure 13 is a slender insertion end with a conical guide and a stepped limiting structure, specifically divided into three parts: a first stepped column portion 131, a second stepped column portion 132, and a conical chamfered section 133. The conical chamfered section 133 has a truncated cylindrical structure and a conical guide platform structure, which facilitates the insertion of mating parts and provides good guidance and mating transition. The first stepped column portion 131 connects to the central straight rod and forms an overlapping area.

[0067] In one embodiment, the axial length of the rear limiting connection structure 13 can be 2.40-3.00 mm, and it is divided into three equal parts: the first stepped column portion 131, the second stepped column portion 132, and the tapered chamfered section 133.

[0068] Preferably, the axial length of the rear limiting connection structure 13 is 2.70 mm, the axial length of the second stepped column portion 132 is 0.90 mm, the diameter can be 1.35 mm, the axial length of the conical chamfered section 133 is 0.90 mm, the conical chamfered section 133 has a cylindrical frustum structure with an axial length of 0.41 mm, and a conical guide platform structure with a length of 0.49 mm.

[0069] In one implementation, the front-end spherical blade 11, the middle straight rod 12, and the rear-end limiting connection structure 13 are integrally molded and made of medical-grade special steel to ensure corrosion resistance and high strength. The special steel includes, but is not limited to, precipitation-hardening stainless steel and martensitic stainless steel. Precipitation-hardening stainless steel is characterized by high strength, wear resistance, and heat treatment for hardening, while martensitic stainless steel has very high hardness and wear resistance, but slightly lower corrosion resistance.

[0070] In one embodiment, the front-end spherical cutter head 11 is provided with a six-bladed helical cutting edge 111 forming a spherical helical curve on a spherical surface. The spherical helical curve is expressed in polar coordinates, and the parametric equation of the spherical helical path is as follows:

[0071] x(t)=R·sin(θ(t))·cos(φ(t))

[0072] y(t)=R·sin(θ(t))·sin(φ(t))

[0073] z(t)=R·cos(θ(t))

[0074] Introducing a screw control function:

[0075] φ(t) = k·t;

[0076] θ(t) = π / 2 + a·sin(nt);

[0077] in:

[0078] t∈[0,2π]

[0079] R represents the radius of the front ball-shaped cutter head 11, which is D / 2;

[0080] n represents the number of spiral blades; n = 6 indicates a 6-bladed helical structure.

[0081] a. Control the degree of upward and downward curvature;

[0082] k controls the spiral unfolding speed, and is usually set to 1 to maintain symmetry.

[0083] In one embodiment, the central straight rod of the spiral six-bladed spherical bone burr is connected to the front spherical cutter head 11 by a connecting part. The connecting part can be a frustum, a cylinder, or an inverted frustum. It should be noted that the frustum is merely an exemplary description of this application. A part of the central straight rod can also be used as a connecting part to connect with the front spherical cutter head 11.

[0084] In one implementation, the error in the opposite direction of the outer diameter of the spiral cutting edge of the 4mm ball head is controlled within ±0.08mm, and preferably within ±0.01mm.

[0085] In one implementation, the outer diameter error of the spiral cutting edge of the 3mm ball head is controlled in the reverse direction within ±0.08mm, and preferably within ±0.01mm.

[0086] In one implementation, the reverse error of the outer diameter of the spiral cutting edge of the 2mm ball head is controlled within ±0.08mm, and preferably within ±0.01mm.

[0087] like Figure 2 As shown, the central straight rod is provided with scale lines 121 (scale points are not shown in the picture), which are used to determine the depth of the front ball-shaped blade during surgery.

[0088] In one embodiment, the distance between the scale lines on the central straight rod is 1.00mm-4.00mm.

[0089] In one embodiment, a scale line is set every 2mm or 3mm on the central straight rod, and the positional error range of the scale line is ±0.1mm.

[0090] In one embodiment, the scale depth of the scale line is 0.01-0.20 mm.

[0091] In one embodiment, the scale line is a raised line with a height of 0.01-0.20 mm.

[0092] Specifically, the central straight rod is equipped with scale lines for judging the depth of the front ball-shaped cutter head during use. Specifically, the distance between the scale lines on the central straight rod ranges from 1.00 to 4.00 mm, and a scale line can be set every 2 mm or 3 mm. The positional error range of the scale lines is ±0.1 mm. In this way, during the operation, the depth of the front ball-shaped cutter head can be determined according to the position of the scale lines, and the maximum depth can be set by the user during the operation based on the length of the extracted tooth root, so as to better perform the operation.

[0093] In one embodiment, the scale depth of the graduation line is 0.10-0.30 mm; alternatively, the graduation line can be set as a raised line with a height of 0.01-0.20 mm. Specifically, better marking effects can be achieved by setting graduation lines of different depths or convexities. For example, the first graduation line can be a concave line with a depth of 0.20 mm and a distance of 2 mm from the edge of the front spherical cutter head; the second graduation line can be a concave line with a depth of 0.10 mm and a distance of 4 mm from the edge of the front spherical cutter head; the third graduation line can be a raised line with a height of 0.10 mm and a distance of 6 mm from the edge of the front spherical cutter head; the fourth graduation line can be a raised line with a height of 0.20 mm and a distance of 8 mm from the edge of the front spherical cutter head; the fifth graduation line can be a raised line with a height of 0.10 mm and a distance of 10 mm from the edge of the front spherical cutter head; the sixth graduation line can be a concave line with a height of 0.10 mm and a distance of 12 mm from the edge of the front spherical cutter head, and so on.

[0094] In one specific implementation, the diameter of the front-end spherical blade 11 is 2.00mm, 3.00mm, or 4.00mm, and the error of the diameter of the front-end spherical blade 11 is controlled within ±0.08mm. For example, the diameter of the front-end spherical blade 11 is 1.92mm to 2.08mm, 2.92mm to 3.08mm, or 3.92mm to 4.08mm. Specifically, the error of the diameter of the front-end spherical blade 11 can also be controlled within ±0.3mm. However, for precision surgical equipment, a method with high processing precision is preferred.

[0095] The six-bladed spherical bone harvesting drill provided by this utility model, combined with a unique structural design and precision manufacturing process, has the following significant advantages in clinical applications:

[0096] 1. It adopts a six-bladed spherical spiral cutting structure with the cutting edge distributed in a spherical spiral. When operating in the fresh extraction socket and the uneven area of ​​the alveolar ridge, it can quickly and gently cut bone tissue, effectively extract fresh bone paste, and cause little damage to the surrounding tissue. The extraction process is stable and controllable.

[0097] 2. The spherical blade with a six-blade spiral design is particularly suitable for the recessed area and irregular alveolar ridge top formed after tooth extraction, achieving precise bone harvesting without increasing surgical trauma.

[0098] 3. The collected fresh bone paste can be directly applied to the implant surgery, covering the exposed surface of the implant, effectively increasing the bone volume and density in the surgical area, enhancing the fusion between the implant and bone tissue, thereby improving the initial stability and long-term survival rate of the implant.

[0099] 4. The bone paste extracted by this device can also be used in periodontal surgery to cover the exposed area of ​​the tooth root, providing an ideal scaffold for periodontal tissue regeneration, assisting in tooth stabilization, and improving the quality and stability of periodontal surgery.

[0100] 5. The drill bits come in various sizes and have high processing precision, with errors controlled within 0.005mm to 0.01mm, adapting to the oral anatomy needs of different patients and providing operators with a stable and smooth operating feel.

[0101] 6. The entire device is made of specially processed metal in one piece, which has excellent corrosion resistance and high strength. It is suitable for high-frequency sterilization, which extends the service life of the device and ensures patient safety.

[0102] This utility model provides a six-bladed spherical bone harvesting drill with a sharp and precise front-end structure, resulting in high cutting efficiency and enabling precise grinding in a short time, significantly improving clinical operation efficiency. The overall structure is made of a special metal, making it sturdy and wear-resistant, maintaining excellent performance even after long-term use, and ensuring stable and reliable quality. Its slim and agile design allows for flexible operation, precisely reaching deep into the oral cavity and narrow areas, improving treatment accuracy. It not only enhances the doctor's operating comfort but also effectively reduces patient discomfort, improving the overall treatment experience.

[0103] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For system embodiments, since they largely correspond to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0104] The methods and systems of this invention may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of this invention are not limited to the specific order described above unless otherwise specifically stated. Furthermore, in some embodiments, this invention may also be implemented as a program recorded on a recording medium, the program comprising machine-readable instructions for implementing the methods according to this invention. Thus, this invention also covers recording media storing programs for executing the methods according to this invention.

[0105] The description of this utility model is given for illustrative and descriptive purposes only, and is not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the utility model, and to enable those skilled in the art to understand the utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A six-bladed spherical bone-harvesting drill, characterized in that, include: It consists of a front ball-shaped cutter head, a middle straight rod body, and a rear limiting connection structure. The front-end spherical cutter head includes a six-bladed helical cutting edge, and the structure of the helical cutting edge is a spherical helical structure. The diameter of the front-end spherical cutter head is D1, wherein 1.60mm≤D1≤4.40mm; The helical angle of the six-bladed spiral cutting edge of the front ball-shaped cutter head is angle1, where 27°≤angle1≤33°.

2. The six-bladed spherical bone-harvesting drill according to claim 1, characterized in that, include: When the diameter D1 of the front ball cutter head is 2.00 mm, the depth of the six-bladed spiral cutting edge of the front ball cutter head is h21, where 0.39 mm ≤ h21 ≤ 0.61 mm.

3. The six-bladed spherical bone-harvesting drill according to claim 1, characterized in that, include: When the diameter D1 of the front ball cutter head is 3.00 mm, the depth of the six-bladed spiral cutting edge of the front ball cutter head is h22, where 0.69 mm ≤ h22 ≤ 0.91 mm.

4. The six-bladed spherical bone-harvesting drill according to claim 1, characterized in that, include: When the diameter D1 of the front ball cutter head is 4.00mm, the depth of the six-bladed spiral cutting edge of the front ball cutter head is h23, where 0.80mm≤h23≤1.05mm.

5. The six-bladed spherical bone-harvesting drill according to claim 1, characterized in that, The length of the central straight rod is H1, and the diameter is D2, wherein 25.00mm≤H1≤40.00mm and 2.00mm≤D2≤2.50mm.

6. The six-bladed spherical bone-harvesting drill according to claim 5, characterized in that, include: The length of the middle straight rod is H1, which is 26.69 mm; or The length of the middle straight rod is H1, which is 35.40 mm. or The length of the middle straight rod is H1, which is 27.40 mm. or The length of the middle straight rod is H1, which is 34.69 mm; or The length of the middle straight rod is H1, which is 27.58 mm; or The diameter D2 of the middle straight rod is 2.35mm.

7. The six-bladed spherical bone-harvesting drill according to claim 5, characterized in that, include: The central straight rod is provided with a scale for judging the surgical depth of the front ball-shaped blade during use. The scale includes scale lines or scale points.

8. The six-lobed spherical bone-harvesting drill according to claim 7, characterized in that, include: The distance between the graduated lines on the central straight rod ranges from 1.00mm to 4.00mm. and / or A scale line is set every 2mm or 3mm on the central straight rod, and the positional error range of the scale line is ±0.1mm; and / or The graduation depth of the scale lines is 0.01-0.20mm; and / or The scale lines are raised, with a height of 0.01-0.20 mm.

9. The six-bladed spherical bone-harvesting drill according to claim 1, characterized in that, include: The rear limit connection structure consists of a first-step column section, a second-step column section, and a tapered chamfered section; and / or The length of the rear limit connection structure is 2.70mm.

10. The six-bladed spherical bone-harvesting drill according to claim 1, characterized in that, include: The front ball-shaped cutter head, the middle straight rod body, and the rear limiting connection structure are all integrally molded and made of special metal or titanium alloy to ensure corrosion resistance and high strength.

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