Surgical cutting edge grinding head

Abstract

The invention relates to the technical field of medical instruments, and discloses a surgical cutting edge grinding head which comprises a grinding head body, an arc-shaped cutting edge is arranged on the grinding head body, and the edge portion of the cutting edge is higher than the datum plane of the grinding head body. The cutting edge is divided into a forward rotation section and a reverse rotation section which are opposite in rotation direction and are in mirror symmetry by taking a vertex as a boundary; a first rotary blade front angle and a second rotary blade front angle are formed on the cutting faces on the two sides of the cutting blade respectively, and the absolute value of the first rotary blade front angle is smaller than that of the second rotary blade front angle. The same cutting edge grinding head can achieve integration of efficient cutting and controllable heat accumulation, and bone tissue grinding and bone surface temperature control hemostasis are synchronously completed during an operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a cutting edge grinding head for surgery. Background Technology

[0002] In orthopedic surgery, burrs are commonly used for fine grinding and shaping of bone surfaces, as well as removal of bone spurs. Existing orthopedic surgical burrs are mainly divided into two categories: one is a structure with multiple cutting edges evenly distributed circumferentially, and the other is a traditional integral spherical structure.

[0003] However, these existing technologies have the following significant drawbacks: 1. When the multi-bladed circumferentially distributed grinding head rotates at high speed, the alternating cutting of multiple blades can easily lead to periodic fluctuations in cutting force, causing vibration in the grinding head and affecting operational stability and grinding accuracy. Simultaneously, the multi-bladed structure can severely disturb the irrigation fluid in the surgical area, affecting the clarity of the surgical field and potentially reducing cooling efficiency, leading to local overheating and damage to bone tissue viability. 2. Traditional integral spherical grinding heads or ordinary multi-bladed grinding heads are designed primarily for cutting efficiency. In surgical scenarios requiring simultaneous hemostasis of the bone surface (such as bone surface bleeding), existing grinding heads cannot achieve effective temperature-controlled coagulation of the bone wound while efficiently removing bone. Surgeons need to frequently change instruments or use other hemostasis methods, prolonging surgical time and increasing operational complexity. 3. Complex grooves or protrusions can severely interfere with the water flow field, creating turbulence, which not only reduces the cooling effect of the irrigation fluid on the cutting point and the debris flushing effect but may also affect the surgical field. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a surgical cutting edge grinding head that integrates efficient cutting and controllable heat accumulation in the same cutting edge grinding head, and simultaneously completes bone tissue grinding and bone surface temperature-controlled hemostasis during surgery, thereby improving surgical efficiency.

[0005] The present invention solves the above-mentioned technical problems through the following technical means: This invention discloses a surgical cutting edge grinding head, comprising a grinding head body, wherein an arc-shaped cutting edge is provided on the grinding head body, and the cutting edge of the cutting edge is higher than the reference surface of the grinding head body; the cutting edge is divided into a forward spiral segment and a reverse spiral segment with opposite spiral directions and mirror symmetry, with the vertex as the boundary; the two cutting surfaces on both sides of the cutting edge are respectively formed into a first spiral rake angle and a second spiral rake angle, wherein the absolute value of the first spiral rake angle is smaller than the absolute value of the second spiral rake angle.

[0006] In this technical solution, the cutting edge is divided into two sections, each with a different rake angle. The first rotating edge has a smaller rake angle to maintain sharpness, focusing on efficient cutting of bone tissue during forward rotation. The second rotating edge has a larger rake angle, reducing its cutting ability during reverse rotation, but generating more heat when rubbing the bone surface with slower heat dissipation. This results in a controllable temperature rise on the bone wound surface, promoting protein denaturation and clotting microvessels. Thus, when the grinding head body is driven to rotate forward and backward, efficient cutting and controllable heat accumulation can be synergistically achieved, simultaneously completing bone tissue grinding and temperature-controlled hemostasis on the bone surface, achieving a dual-purpose device.

[0007] Furthermore, the grinding head body is spherical, and the cutting edge extends radially along the maximum circumference line of the sphere's surface. This configuration, when the grinding head body rotates, reduces water agitation and vortex generation, resulting in a better surgical field of view.

[0008] Furthermore, the forward and reverse rotation sections are connected at the apex of the grinding head body away from the drive rod, forming a smooth transition. This configuration allows for complete replacement of cutting and coagulation actions through forward and reverse rotation grinding heads.

[0009] Furthermore, the diameter of the grinding head body is D, and the cutting edge is raised above the spherical reference surface by a height of D*1%~D*8%. This design makes the cutting edge slightly convex, which ensures the integrity of the grinding head body as much as possible in terms of shape and further reduces the agitation of the water.

[0010] Furthermore, the diameter of the sphere of the grinding head body is 2.0mm to 7.0mm, and the cutting edge is 0.06mm to 0.15mm higher than the spherical reference surface.

[0011] Furthermore, the angle range of the first rake angle is -30° to 15°; the angle range of the second rake angle is -50° to -70°. Such angles allow the cutting edge to remain sharp during forward rotation, focusing on efficiently cutting bone tissue; during reverse rotation, the cutting ability is weakened, but more heat is generated when rubbing against the bone surface, and heat dissipation is slower, thus creating a controllable temperature rise on the bone wound surface, achieving the effect of promoting protein denaturation and closing microvessels for coagulation.

[0012] Furthermore, a drive rod is provided on the grinding head body, and the drive rod is used to connect an external drive source to drive the grinding head body to rotate. In this technical solution, the drive rod is used to connect an external drive source to drive the grinding head body to rotate.

[0013] Furthermore, the connection between the grinding head body and the drive rod is configured as a platform, and the drive rod and the grinding head body are integrally formed.

[0014] Furthermore, the cutting edge is a continuous cutting edge.

[0015] Furthermore, the cutting edge is a discontinuous edge, and the discontinuous edge is provided with several chip-breaking grooves, with the chip-breaking grooves on the forward and reverse spiral sections being distributed alternately. This arrangement allows gaps to be formed between adjacent chip-breaking grooves, creating natural chip removal channels. The cut bone chips can quickly detach from the cutting area along the gaps and will not adhere to the cutting edge, affecting subsequent cutting accuracy.

[0016] The beneficial effects of this invention are: This invention employs a single radial cutting edge design, which, compared to a multi-edge structure, ensures continuous and stable cutting force transmission, significantly reducing grinding head vibration and water disturbance, thus guaranteeing a clear surgical field and stable operating feel. The cutting edge is only slightly convex, maximizing the streamlined shape of the sphere and further minimizing interference with the rinsing water flow.

[0017] This invention divides a continuous cutting edge into a forward-rotating segment and a reverse-rotating segment. The two cutting surfaces on both sides of the cutting edge are respectively formed as the first and second rake angles. The first rake angle uses a smaller rake angle to maintain sharpness and focus on efficient cutting of bone tissue. The second rake angle uses a larger rake angle, which reduces its cutting ability. It can still have a certain cutting ability, but the cutting efficiency is lower, which can meet the needs of inefficient cutting during surgery. However, inefficient cutting will also generate more heat when rubbing the bone surface and dissipate heat more slowly, thereby generating a controllable temperature rise on the bone wound surface, which can promote protein denaturation and coagulation by closing microvessels, thus achieving the purpose of dual use of one device.

[0018] This invention integrates two functions through a gradient design of a single cutting edge, resulting in a sophisticated structure. The design of the through-cut and smooth transition at the apex ensures the continuity and strength of the cutting edge at the apex of the sphere, enabling the grinding head to maintain consistent performance when entering the cutting direction from all directions.

[0019] When the cutting edge of this invention is a discontinuous cutting edge, a number of chip-breaking grooves are provided on the discontinuous cutting edge. The chip-breaking grooves on the forward and reverse rotation sections are staggered, which can form gaps between adjacent chip-breaking grooves, forming a natural chip removal channel. The cut bone chips can quickly leave the cutting area along the gaps and will not adhere to the cutting edge, affecting the subsequent cutting accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the surgical cutting edge grinding head of Embodiment 1 of the present invention; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 It is facing the end of the drive rod directly. Figure 1 Structural diagram; Figure 4 yes Figure 3 A magnified view of a section at point B in the middle; Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 6 yes Figure 5 A magnified view of a section at point C; Figure 7 yes Figure 5 A schematic diagram of the structure of the intermediate grinding head body.

[0021] in, Grinding head body 1, drive rod 2, cutting edge 11, forward rotation section 12, reverse rotation section 13, apex 14, first rotating edge rake angle 15, second rotating edge rake angle 16; Discontinuous cutting edge 111, chip breaking groove 112. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0023] This embodiment is a surgical cutting edge grinding head, such as... Figure 1 As shown, the device includes a grinding head body 1 and a drive rod 2. The connection between the grinding head body 1 and the drive rod 2 is configured as a platform, and the drive rod 2 is integrally formed with the grinding head body 1. In other embodiments, the drive rod 2 may also be welded to the grinding head body 1; the drive rod 2 may be a hollow rod or a solid rod, and the drive rod 2 is used to connect an external drive source to drive the grinding head body 1 to rotate.

[0024] When grinding bone tissue, the grinding head body 1 is generally in an aqueous environment. To reduce water agitation and vortex generation during rotation, thus improving the surgical field of view, the grinding head body 1 in this embodiment is spherical. In other embodiments, the grinding head body can also be disc-shaped, with the cutting edge located on the outer edge of the disc-shaped grinding head body. However, this shape would cause greater water agitation, affecting the surgical field of view.

[0025] like Figure 2As shown, the grinding head body 1 has an arc-shaped cutting edge 11 extending radially along the maximum circumference line of the spherical surface. In this embodiment, the cutting edge is a continuous cutting edge. The center of the arc of the cutting edge 11 is collinear with the central axis of the drive rod 2. The cutting edge of the cutting edge 11 is higher than the reference surface of the grinding head body 1. The diameter of the grinding head body 1 is D, and the cutting edge of the cutting edge 11 is higher than the spherical reference surface by a height of D*1%~D*8%. This allows the cutting edge of the cutting edge 11 to be slightly convex, ensuring the integrity of the grinding head body 1 as much as possible in terms of shape, and further reducing the agitation of the water. In practice, the diameter of the sphere of the grinding head body 1 can be 2.0mm~7.0mm, and the cutting edge of the cutting edge 11 can be higher than the spherical reference surface by 0.06mm~0.15mm. In this embodiment, the diameter of the sphere of the grinding head body 1 is set to 3.0mm, and the cutting edge of the cutting edge 11 is higher than the spherical reference surface by 0.1mm.

[0026] like Figure 2 and Figure 3 As shown, the cutting edge 11 is divided into a forward spiral segment 12 and a reverse spiral segment 13 with opposite spiral directions and mirror symmetry, with vertex 14 as the boundary. In order to enable the forward and reverse grinding heads to completely replace the cutting and coagulation functions, the forward spiral segment 12 and the reverse spiral segment 13 are connected at vertex 14 of the grinding head body 1 away from the drive rod 2, and form a smooth transition.

[0027] like Figure 3 and Figure 4 As shown, the two cutting surfaces of the cutting edge 11 are respectively formed with a first rake angle α15 and a second rake angle β16, and the absolute value of the first rake angle α15 is smaller than the absolute value of the second rake angle β16. To ensure that the cutting edge 11 remains sharp when the grinding head body 1 rotates forward, focusing on efficient cutting of bone tissue; and to reduce its cutting ability when rotating in the reverse direction, it can still have a certain cutting ability, but the cutting efficiency is lower, meeting the needs of situations where inefficient cutting is sometimes required during surgery; however, inefficient cutting will also generate more heat when rubbing the bone surface and dissipate heat more slowly, thereby creating a controllable temperature rise on the bone wound surface, achieving the effect of promoting protein denaturation and closing microvessels for coagulation. Specifically, the angle range of the first rake angle α15 can be -30° to 15°; and the angle range of the second rake angle β16 can be -50° to -70°. In this embodiment, the angle of the first rake angle 15 is -30°; and the angle of the second rake angle β16 is -60°. In this application, the spherical shape from the tip of the cutting edge 11 to the grinding head body 1 is taken as the normal, and the angle passing through the normal is the negative rake angle. Figure 4 As shown, the rake angle α15 of the first spinning blade does not cross the normal and is a negative rake angle of -30°; the rake angle β16 of the second spinning blade also does not cross the normal and is a negative rake angle of -60°.

[0028] The principle of the surgical cutting edge grinding head in this embodiment is as follows: The key to this grinding head lies in its arc-shaped cutting edge 11 and its unique cutting edge design. This cutting edge 11 is divided into two segments with opposite directions of rotation and mirror symmetry, with vertex 14 as the boundary: a forward rotation segment 12 and a reverse rotation segment 13. Most importantly, these two cutting edges have different rake angles, i.e., the angle of the cutting edge's inclination: the first rotation rake angle 15 (smaller absolute value, e.g., -30° to 15°): this angle design keeps the cutting edge sharp. The second rotation rake angle 16 (larger absolute value, e.g., -50° to -70°): this angle design weakens its cutting sharpness.

[0029] This differentiated rake angle design results in distinctly different effects for the grinding head body 1 under different rotational directions: when the grinding head body 1 is driven to rotate forward, the cutting edge with a smaller rake angle serves as the primary cutting edge, focusing on efficiently cutting and removing bone tissue. When the grinding head body 1 is driven to rotate in the reverse direction, the cutting edge with a larger rake angle contacts the bone surface. Its cutting ability is reduced, but it generates more heat during friction with the bone surface and dissipates it more slowly. This controllable heat accumulation can raise the local temperature of the bone wound, thereby promoting protein denaturation, closing microvessels, and achieving a temperature-controlled coagulation effect.

[0030] The method of using the surgical cutting edge grinding head in this embodiment is as follows: First, connect the drive rod 2 at the end of the grinding head body 1 to the corresponding surgical power device (drive source).

[0031] When it is necessary to grind, cut bone tissue or remove bone spurs, the grinding head body 1 is driven to rotate in the forward direction by the drive source. At this time, the sharp cutting edge is used to perform efficient and stable fine cutting.

[0032] When it is necessary to stop bleeding on a bone wound, the grinding head body 1 is driven to rotate in the opposite direction by the drive source. At this time, the blunted cutting edge is used to rub against the bone surface, and the generated controllable heat achieves thermal coagulation hemostasis.

[0033] Doctors can switch the rotation direction of the drive device to perform cutting and hemostasis operations at the same surgical site at any time, as needed for the surgical procedure, without having to change instruments. Example 2

[0034] This embodiment is a surgical cutting edge grinding head, such as... Figures 5-7 As shown, compared with the grinding head of Embodiment 1, the only difference is that the cutting edge of this embodiment is an intermittent edge, and the intermittent edge is provided with several chip-breaking grooves, with the chip-breaking grooves on the forward and reverse rotation sections being alternately distributed. Figure 6 As shown, the chip-breaking grooves on the forward and reverse rotation sections are staggered, meaning they are on the same plane but do not overlap in height. This ensures complete cutting of bone tissue during the rotation of the grinding head, eliminating any blind spots in the cutting process.

[0035] During the cutting of bone tissue, gaps can be formed between adjacent chip-breaking grooves, creating a natural chip removal channel. The cut bone chips can quickly detach from the cutting area along the gaps and will not adhere to the cutting edge, affecting the subsequent cutting accuracy.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention. Technical aspects, shapes, and structures not described in detail in this invention are all well-known technologies.

Claims

1. A surgical cutting edge grinding head, comprising a grinding head body, characterized in that: The grinding head body is provided with an arc-shaped cutting edge, the cutting edge of which is higher than the reference surface of the grinding head body; the cutting edge is divided into a forward spiral segment and a reverse spiral segment with opposite spiral directions and mirror symmetry, with the vertex as the boundary; the two cutting surfaces on both sides of the cutting edge are respectively formed as a first spiral rake angle and a second spiral rake angle, the absolute value of the first spiral rake angle is smaller than the absolute value of the second spiral rake angle.

2. The surgical cutting edge grinding head according to claim 1, characterized in that: The grinding head body is spherical, and the cutting edge extends radially along the maximum circumference line of the spherical surface.

3. The surgical cutting edge grinding head according to claim 2, characterized in that: The forward and reverse rotation segments are connected at the apex of the grinding head body away from the drive rod, forming a smooth transition.

4. The surgical cutting edge grinding head according to claim 3, characterized in that: The diameter of the grinding head body is D, and the cutting edge is D*1%~D*8% higher than the spherical reference surface.

5. The surgical cutting edge grinding head according to claim 4, characterized in that: The diameter of the sphere in the grinding head body is 2.0mm to 7.0mm, and the cutting edge protrudes 0.06mm to 0.15mm above the spherical reference surface.

6. The surgical cutting edge grinding head according to any one of claims 1-5, characterized in that: The angle range of the first rotating blade's front angle is -30° to 15°; the angle range of the second rotating blade's front angle is -50° to -70°.

7. The surgical cutting edge grinding head according to any one of claims 1-5, characterized in that: The grinding head body is provided with a drive rod, which is used to connect an external drive source to drive the grinding head body to rotate.

8. The surgical cutting edge grinding head according to claim 6, characterized in that: The connection between the grinding head body and the drive rod is set as a platform, and the drive rod and the grinding head body are integrally formed.

9. The surgical cutting edge grinding head according to claim 8, characterized in that: The cutting edge is a continuous cutting edge.

10. The surgical cutting edge grinding head according to claim 8, characterized in that: The cutting edge is a discontinuous cutting edge, and the discontinuous cutting edge is provided with a plurality of chip-breaking grooves, with the chip-breaking grooves on the forward and reverse spiral sections being distributed alternately.

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