Ultrasonic bone cutter head and ultrasonic bone cutter system

Abstract

The application provides an ultrasonic bone knife head and an ultrasonic bone knife system. The ultrasonic bone knife system comprises an ultrasonic host, a transducer and an ultrasonic bone knife head. The transducer is connected to the ultrasonic bone knife head. The ultrasonic host provides electric energy for the transducer. The transducer is used for converting electric energy into mechanical vibration. The ultrasonic bone knife head comprises a knife rod and a cutting part connected to one end of the knife rod. The cutting part has a multi-prism structure and a plurality of side surfaces. The plurality of side surfaces comprises at least two connected cutting surfaces. The cutting surface has at least two cutting grooves. The opposite sides of the cutting groove are respectively formed with cutting teeth. The cutting teeth have wall surfaces facing the cutting groove. The relative distance between at least a part of the two wall surfaces located on the opposite sides of the cutting groove gradually increases from the bottom of the cutting groove to the opening direction. The application can improve the cutting noise of the ultrasonic bone knife head, improve the use experience of medical staff, and reduce the damage of noise to the hearing of medical staff.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, and more specifically, relates to an ultrasonic bone scalpel tip and an ultrasonic bone scalpel system. Background Technology

[0002] The amplitude of an ultrasonic bone scalpel tip is generally positively correlated with the cutting speed; the higher the required cutting speed, the larger the amplitude. However, the larger the amplitude of the ultrasonic bone scalpel tip, the greater the noise, which reduces the user experience for medical staff and may even cause some damage to their hearing. Utility Model Content

[0003] The purpose of this application is to provide an ultrasonic bone scalpel tip and an ultrasonic bone scalpel system to solve the technical problem of high cutting noise in the existing ultrasonic bone scalpel tip.

[0004] To achieve the above objectives, in a first aspect, the technical solution adopted in this application is: to provide an ultrasonic bone scalpel tip, including a shank and a cutting portion connected to one end of the shank, wherein the cutting portion is a multi-faceted pyramidal structure and has multiple side surfaces; the multiple side surfaces include at least two connected cutting surfaces, each cutting surface having at least two cutting grooves, each cutting groove having cutting teeth formed on opposite sides, each cutting tooth having a wall facing the cutting groove, and the relative distance between at least a portion of the two walls located on opposite sides of the cutting groove gradually increasing from the bottom of the cutting groove to the opening direction.

[0005] In some embodiments, the extending direction of the cutting groove forms a first angle with the axial direction of the tool holder that is not 90 degrees.

[0006] Alternatively, the direction of the cutting groove is perpendicular to the axial direction of the tool holder.

[0007] In some embodiments, the extending direction of the cutting groove forms a first angle with the axial direction of the tool holder, the first angle being in the range of 20 degrees to 70 degrees.

[0008] In some embodiments, the cutting grooves are distributed sequentially along the axial direction of the tool holder.

[0009] In some embodiments, the cutting tooth has a dividing groove that extends at least through the top region of the cutting tooth along the axial direction of the tool holder.

[0010] In some embodiments, the two connected cutting surfaces are symmetrically arranged, the cutting teeth in the two connected cutting surfaces are symmetrically arranged, and the dividing grooves in the two connected cutting surfaces are symmetrically arranged.

[0011] In some embodiments, the dividing grooves on two adjacent cutting teeth are staggered along the extension direction of the cutting teeth.

[0012] In some embodiments, the cutting portion further includes a first drainage groove and at least two drainage surfaces, wherein the two drainage surfaces extend from opposite sides of the first drainage groove to the corresponding cutting surface; the drainage surface is formed with a second drainage groove, which extends from the first drainage groove to the cutting groove.

[0013] In some embodiments, the outer peripheral surface of the tool holder is formed with a plurality of inclined grooves that are spaced apart circumferentially and extend spirally.

[0014] In some embodiments, the ultrasonic bone scalpel tip further has a through hole extending through the scalpel and the cutting portion along the axial direction of the scalpel shank.

[0015] Secondly, this application also provides an ultrasonic bone scalpel system, including an ultrasonic host, a transducer, and the aforementioned ultrasonic bone scalpel head. The transducer is connected to the ultrasonic bone scalpel head, the ultrasonic host provides electrical energy to the transducer, and the transducer is used to convert the electrical energy into mechanical vibration.

[0016] The beneficial effects of the ultrasonic bone scalpel tip and ultrasonic bone scalpel system provided in this application are as follows: By gradually increasing the relative distance between at least a portion of the two walls located on opposite sides of the cutting groove along the bottom of the cutting groove towards the opening, when the ultrasonic bone scalpel tip vibrates along the axial direction of the shank, the coolant in the cutting groove will be inclined outward by the walls, reducing the noise caused by the coolant impacting the walls along the axial direction of the shank. This embodiment, through the design of the inclined extension of the walls, can improve the cutting noise of the ultrasonic bone scalpel tip, enhance the user experience for medical personnel, and reduce the noise damage to their hearing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the ultrasonic bone scalpel head provided in the first embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the first side structure of the ultrasonic bone scalpel head provided in the first embodiment of this application;

[0020] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0021] Figure 4 This is a schematic diagram of the second side structure of the ultrasonic bone scalpel head provided in the first embodiment of this application;

[0022] Figure 5 for Figure 4 A magnified structural diagram of part B in the middle;

[0023] Figure 6 This is a three-dimensional structural diagram of the cutting part in the ultrasonic bone scalpel head provided in the second embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the side structure of the cutting part in the ultrasonic bone scalpel head provided in the third embodiment of this application;

[0025] Figure 8 for Figure 7 A schematic diagram of the cross-sectional structure of CC;

[0026] Figure 9 A schematic diagram of the drainage surface side of the cutting section in the ultrasonic bone scalpel head provided in the first embodiment of this application;

[0027] Figure 10 This is a schematic diagram of the axial direction structure of the cutting part in the ultrasonic bone scalpel head provided in the first embodiment of this application.

[0028] The following are the labeling elements in the figure:

[0029] 100. Cutting section; 101. First end; 102. Second end; 110. Cutting surface; 111. Cutting groove; 111a. First cutting groove; 111b. Second cutting groove; 111c. Third cutting groove; 1111. Wall surface; 112. Cutting tooth; 112a. First cutting tooth; 112b. Second cutting tooth; 112c. Third cutting tooth; 1121. Contact surface; 1122. Dividing groove; 120. Cutting edge; 130. Drainage surface; 131. Second drainage groove; 140. First drainage groove; 200. Tool holder; 210. First rod segment; 220. Second rod segment; 230. Third rod segment; 240. First transition segment; 250. Second transition segment; 260. Inclined groove; 300. Through hole. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0033] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] In orthopedic, dental, and other surgical procedures, ultrasonic bone scalpels are frequently used to cut, grind, plan, and scrape the bone treatment area. Clinically, ultrasonic bone scalpels are mainly used in spinal surgery, neurosurgery, maxillofacial surgery, and joint osteotomy, encompassing procedures such as laminectomy, osteotomy, interbody fusion, and anterior cervical subtotal corpectomy.

[0035] Laminectomy is a surgical procedure that reduces bony compression by increasing the volume of the spinal canal in the cervical spine. Depending on the incision method, it is classified as single-door, double-door, or intermediate-door. Currently, the most commonly used surgical method is the single-door procedure. One side is the incision side where the lamina is cut, and the other side is the portafilter side where the lamina is not completely cut. The portafilter side incision is V-shaped. By pushing the lamina along the portafilter side, the overall volume of the spinal canal can be increased, reducing nerve compression and achieving the desired surgical effect.

[0036] The amplitude of the ultrasonic bone scalpel tip is generally positively correlated with the cutting speed; the higher the required cutting speed, the larger the amplitude. However, the larger the amplitude of the ultrasonic bone scalpel tip, the greater the noise, reducing the user experience for medical staff and potentially causing hearing damage. Specifically, during the cutting process, the ultrasonic bone scalpel tip vibrates along the axis of the shank 200, causing the coolant in its cutting groove to also vibrate along the axis of the shank (hereinafter referred to as the axial direction) and impact the side walls, generating significant noise.

[0037] Therefore, this application provides an ultrasonic bone scalpel tip and ultrasonic bone scalpel system. By extending the wall of the cutting groove 111 outward at an angle, the coolant in the cutting groove 111 is inclined outward through the inclined wall to reduce the noise caused by the coolant hitting the wall along the axial direction of the scalpel 200.

[0038] Please refer to the following: Figures 1 to 5 The ultrasonic bone scalpel head provided in the embodiments of this application will now be described in detail.

[0039] The ultrasonic bone scalpel head includes a shank 200 and a cutting section 100 connected to one end of the shank 200. The cutting section 100 has a multi-faceted pyramidal structure and multiple sides. The multiple sides include at least two connected cutting surfaces 110. Each cutting surface 110 has at least two cutting grooves 111. Cutting teeth 112 are formed on opposite sides of each cutting groove 111. Each cutting tooth 112 has a wall surface 1111 facing the cutting groove 111. The relative distance between at least a portion of the two wall surfaces 1111 on opposite sides of the cutting groove 111 gradually increases from the bottom of the cutting groove 111 to the opening direction.

[0040] The multi-faceted cutting section 100 has multiple sides, which refer to the sides between the two ends of the cutting section 100. Specifically, the cutting section 100 has a first end 101 and a second end 102 disposed opposite to each other. The first end 101 is used to connect with the tool holder 200, and the second end 102 is the end of the cutting section 100 that is away from the tool holder 200. The multiple sides of the cutting section 100 refer to the multiple sides of the cutting section 100 located between the first end 101 and the second end 102, and these multiple sides are connected sequentially from end to end along the circumference of the cutting section 100.

[0041] Multiple sides include at least two connected cutting surfaces 110. When the pyramidal structure includes two cutting surfaces 110, the pyramidal structure also includes at least one third surface for connecting the two cutting surfaces 110, that is, the pyramidal structure is at least a triangular pyramidal structure.

[0042] Additionally, it should be noted that cutting teeth 112 are formed on opposite sides of the cutting groove 111. This means that the cutting teeth 112 are connected to the cutting groove 111. By forming the cutting groove 111, cutting teeth 112 can be formed on opposite sides of the cutting groove 111. The cutting groove 111 is located between two adjacent cutting teeth 112. The cutting tooth 112 includes two wall surfaces 1111 facing the two adjacent cutting grooves 111 respectively and a contact surface 1121 connecting the two wall surfaces 1111. The two wall surfaces 1111 and the contact surface 1121 together form the surface of the cutting tooth 112. The contact surface 1121 is the surface of the cutting tooth 112 located on its outer periphery, that is, the surface of the cutting tooth 112 used to contact the bone surface. The contact surfaces 1121 of multiple cutting teeth 112 constitute the cutting surface 110.

[0043] It should be noted that the cutting groove 111 is formed by the inward concavity of the cutting surface 110, and the cutting groove 111 opens at the position corresponding to the cutting surface 110. The bottom of the cutting groove 111 is the position where the cutting groove 111 is opposite to the opening. The relative distance between at least a portion of the two wall surfaces 1111 located on opposite sides of the cutting groove 111 gradually increases along the direction from the bottom of the cutting groove 111 to the opening. The two wall surfaces 1111 can be inclined from the bottom of the cutting groove 111 to the opening in a direction away from the cutting groove 111, or they can be inclined from a position at a predetermined distance from the bottom of the cutting groove 111 (e.g., 1 / 3 of the distance from the bottom) to the opening in a direction away from the cutting groove 111. That is, the two wall surfaces 1111 do not have to start to incline from the bottom.

[0044] The ultrasonic bone scalpel tip provided in this embodiment gradually increases the relative distance between at least a portion of the two wall surfaces 1111 located on opposite sides of the cutting groove 111 along the direction from the bottom of the cutting groove 111 to the opening. This allows the coolant in the cutting groove 111 to be tilted outward by the wall surfaces 1111 when the ultrasonic bone scalpel tip vibrates along the axial direction of the scalpel 200, reducing the noise caused by the coolant impacting the wall surfaces 1111 along the axial direction of the scalpel 200. This embodiment, through the inclined extension design of the wall surfaces 1111, can improve the cutting noise of the ultrasonic bone scalpel tip, enhance the user experience for medical personnel, and reduce the noise damage to their hearing.

[0045] In some embodiments, please refer to Figure 3 The extension direction of the cutting groove 111 is perpendicular to the axial direction of the tool holder 200.

[0046] In some embodiments, please refer to Figure 3 Each cutting groove 111 is sequentially distributed along the axial direction of the tool holder 200. Specifically, the cutting part 100 has a first end 101 and a second end 102 arranged opposite to each other along the axial direction of the tool holder 200. The cutting part 100 has at least two cutting grooves 111 and at least two cutting teeth 112. The at least two cutting grooves 111 are sequentially spaced from the first end 101 to the second end 102 of the cutting part 100, and the at least two cutting teeth 112 are sequentially spaced from the first end 101 to the second end 102 of the cutting part 100. The cutting teeth 112 are connected to the cutting grooves 111. The at least two cutting grooves 111 and the at least two cutting teeth 112 are arranged in the following order: cutting groove 111, cutting tooth 112, cutting groove 111, cutting tooth 112... That is, at least one wall surface 1111 of the cutting tooth 112 faces the cutting groove 111.

[0047] Furthermore, the cutting tooth 112 located between two adjacent cutting grooves 111 has a smaller contact area between its two wall surfaces 1111 from the tooth root to the tooth tip, which reduces the contact area between the two adjacent wall surfaces 1111 of the cutting tooth 112. This reduces the contact area between the entire cutting surface 110 and the bone surface, thereby reducing cutting noise and increasing cutting efficiency.

[0048] In some embodiments, please refer to Figure 5 The second included angle between the two side walls 1111 of the cutting tooth 112 is an acute angle. The acute angle makes the cutting tooth sharper and the cutting effect better. It is understood that in other embodiments of this application, the second included angle may also be an obtuse angle, and this is not the only limitation.

[0049] In some embodiments, please refer to Figure 3 The walls 1111 on both sides of the cutting tooth 112 are connected by a circular arc surface, meaning the cutting tooth 112 is roughly V-shaped, and the contact surface 1121 of the cutting tooth 112 is a circular arc surface. Here, a circular arc surface refers to a surface whose cross-section along the axis of the tool holder 200 is an arc. This design not only increases the inclination angle of the wall surface 1111 towards the contact surface 1121, making it easier for the coolant in the cutting groove 111 to be drawn out to the contact surface 1121, reducing noise caused by the coolant vertically impacting the wall surface 1111, but also ensures that the contact surface 1121 is a circular arc surface, resulting in line contact between the contact surface 1121 and the bone surface, reducing the overall contact area between the cutting surface 110 and the bone surface, thus reducing cutting noise. Tests have shown that the design of the cutting wall surface 1111 can reduce noise by 30%-50%. It is understood that in other embodiments of this application, the contact surface 1121 may also be a plane, that is, the cross section of the contact surface 1121 along the axial direction of the tool holder 200 is a straight line, which is not a unique limitation here.

[0050] In some embodiments, please refer to Figure 3 The ultrasonic bone scalpel tip includes two cutting surfaces 110, which are symmetrically arranged and connected to each other. The two cutting surfaces 110 are connected by a cutting edge 120, and their cross-sections roughly form a V-shape. Here, the cross-section refers to the section perpendicular to the axis of the scalpel 200. During use, the ultrasonic bone scalpel tip can perform bone grinding operations on the portacular side through the cutting edge 120 between the two cutting surfaces 110. While performing normal bone grinding operations, this ultrasonic bone scalpel tip, due to its V-shaped front end and small area, has a fast grinding speed. Its large rear end provides the surgeon with a good field of vision. Furthermore, its unique full V-shaped structural design allows the surgeon to create a closed V-shaped groove on the portacular side bone side from any operating angle, reducing the area of ​​the cut window, facilitating the surgeon's use, and improving surgical efficiency.

[0051] In some embodiments, please refer to Figure 3 and Figure 5 The cutting surface 110 is an arc-shaped surface, so that the contact between the cutting surface 110 and the bone surface is a contact between the arc-shaped surface and the plane, thereby reducing the contact area between the cutting surface 110 and the bone surface and reducing the cutting effect. It can be understood that in other embodiments of this application, the cutting surface 110 may also be a plane, and this is not the only limitation.

[0052] In some embodiments, please refer to Figure 3 and Figure 5 The cutting grooves 111 on the two cutting surfaces 110 are symmetrical and connected, and the cutting teeth 112 on the two cutting surfaces 110 are symmetrical and connected. This arrangement not only ensures the uniformity of the cutting effect of the two cutting surfaces 110, but also ensures that the coolant in the cutting grooves 111 of the two cutting surfaces 110 is interconnected, increasing the connectivity of the coolant.

[0053] In some embodiments, please refer to Figure 3 and Figure 5 In a cutting section 100, the two connecting cutting teeth 112 on two adjacent cutting surfaces 110 are collectively referred to as cutting strips (not shown in the figure). Each cutting surface 110 includes at least two cutting strips, meaning each cutting surface 110 includes at least two cutting teeth 112. The more cutting strips there are, the more cutting edges the cutting section 100 has, and the better the cutting efficiency. However, the number of cutting strips should not be too high, as too many strips will result in insufficient strength of the cutting teeth 112 and low cutting efficiency. For example, the number of cutting strips can also be three or four.

[0054] For some specific embodiments, please refer to Figure 5 Each cutting surface 110 is provided with three cutting teeth 112 and three cutting grooves 111. The three cutting teeth 112 are respectively a first cutting tooth 112a, a second cutting tooth 112b, and a third cutting tooth 112c. The three cutting grooves 111 are respectively a first cutting groove 111a, a second cutting groove 111b, and a third cutting groove 111c. The first cutting groove 111a is close to the first end 101 of the cutting part 100, and the third cutting tooth 112c is close to the second end 102 of the cutting part 100. The first cutting groove 111a, the first cutting tooth 112a, the second cutting groove 111b, the second cutting tooth 112b, the third cutting groove 111c, and the third cutting tooth 112c are distributed sequentially from the first end 101 to the second end 102 of the cutting part 100. Please also refer to... Figure 5The included angle between the first cutting tooth 112a and the second cutting tooth 112b is an acute angle. However, for the third cutting tooth 112c, since the third cutting tooth 112c is located at the second end 102 of the cutting part 100, in order to ensure that the end face of the second end 102 of the cutting part 100 is a plane with a sufficiently large area, the two wall surfaces 1111 on both sides of the third cutting tooth 112c are obtuse angles.

[0055] Understandably, in other embodiments of this application, the number of cutting surfaces 110 may be three or more, and two adjacent cutting surfaces 110 may be asymmetrically arranged. The number of cutting teeth 112 and cutting grooves 111 may also be two, four, or more.

[0056] In some embodiments, please refer to Figure 6 The cutting tooth 112 has a dividing groove 1122, which extends at least through the top region of the cutting tooth 112 along the axial direction of the tool holder 200. The dividing groove 1122 allows the coolant in the cutting groove 111 to be tilted outwards by the wall surface 1111 when the ultrasonic bone scalpel tip vibrates along the axial direction of the tool holder 200. Furthermore, the coolant in the cutting groove 111 can flow through the dividing groove 1122 to adjacent cutting grooves 111 or to the outside, thus enabling communication between the coolants in adjacent cutting grooves 111. This reduces the probability of coolant impacting the wall surface 1111 and further reduces cutting noise.

[0057] In some embodiments, please refer to Figure 6 The cutting tooth 112 has a contact surface 1121 connecting two adjacent wall surfaces 1111, and the dividing groove 1122 is formed by the concave indentation of the contact surface 1121 of the cutting tooth 112. The dividing groove 1122 not only allows the coolant in adjacent cutting grooves 111 to communicate with each other, preventing coolant from remaining between the narrow-spaced cutting grooves 111 during high-frequency vibration of the ultrasonic bone scalpel tip, thus reducing noise generated by the coolant vibrating back and forth in the cutting grooves 111, but also reduces the area of ​​the contact surface 1121 by penetrating the contact surface 1121 of the cutting tooth 112, thereby reducing the contact area between the entire cutting surface 110 and the bone surface, further reducing noise during the cutting process. Furthermore, it reduces the machining difficulty of the dividing groove 1122. It is understood that in other embodiments of this application, the dividing groove 1122 may not penetrate the contact surface 1121, that is, a through hole may be formed in the cutting tooth 112 to connect the two cutting grooves 111; this is not a unique limitation.

[0058] In some embodiments, please refer to Figure 6The dividing groove 1122 extends along the axial direction of the tool holder 200, thereby reducing the resistance of the coolant flowing through the dividing groove 1122. It can be understood that in other embodiments of this application, the extending direction of the dividing groove 1122 may also form an angle with the axial direction of the tool holder 200, thereby increasing the length of the dividing groove 1122 to accommodate more coolant.

[0059] In some embodiments, please refer to Figure 6 The transverse cross-section of the dividing groove 1122 is rectangular or square. It is understood that in other embodiments of this application, the transverse cross-section of the dividing groove 1122 may also be arc-shaped, triangular or other shapes, and is not limited here.

[0060] In some embodiments, please refer to Figure 6 The dividing grooves 1122 on two adjacent cutting teeth 112 are staggered along the extension direction of the cutting teeth 112. This arrangement prevents the coolant from being directly led outward along the axis of the tool holder 200 through each dividing groove 1122, which would result in insufficient coolant in the cutting groove 111.

[0061] Optionally, the number of dividing grooves 1122 on each cutting tooth 112 can be one or more, depending on the length of the cutting tooth 112. When the length of the cutting tooth 112 is large, more dividing grooves 1122 can be provided; when the length of the cutting tooth 112 is small, fewer dividing grooves 1122 can be provided. For example, since the cutting part 100 has a multi-faceted pyramidal structure, the lengths of the first cutting tooth 112a, the second cutting tooth 112b, and the third cutting tooth 112c gradually decrease. The two first cutting teeth 112a are each provided with three dividing grooves 1122, the two second cutting teeth 112b are each provided with two dividing grooves 1122, and the two third cutting teeth 112c are each provided with one dividing groove 1122. The dividing groove 1122 of the third cutting tooth 112c is used to lead the coolant in the third cutting groove 111c to the outside of the second end 102 of the cutting part 100.

[0062] In some embodiments, please refer to Figure 6 The dividing grooves 1122 in the two adjacent cutting surfaces 110 are symmetrically arranged, that is, the number, position, shape and size of the dividing grooves 1122 in the two cutting teeth 112 in the same cutting bar are the same. It can be understood that in other embodiments of this application, the dividing grooves 1122 in the two adjacent cutting surfaces 110 may also be asymmetrically arranged, for example, at least one of the following is different: the number, position, shape and size of the dividing grooves 1122 in the two cutting surfaces 110.

[0063] In some other embodiments of this application, the dividing groove 1122 may not be provided on the cutting tooth 112, which can also reduce the contact area between the contact surface 1121 and the bone surface. Specifically, the contact surface 1121 of the cutting tooth 112 has a plurality of spaced protrusions. The protrusions contact the bone surface to reduce the contact area between the cutting surface 110 and the bone surface, thereby reducing cutting noise and increasing cutting efficiency.

[0064] Specifically, protrusions can be formed by knurling, or by machining or casting.

[0065] In some embodiments, please refer to Figure 1 The outer circumferential surface of the cutter shank 200 has multiple circumferentially spaced and spirally extended inclined grooves 260. Specifically, the inclined grooves 260 extend spirally in a first direction, which has both an axial component and a circumferential component of the ultrasonic bone scalpel head. This configuration converts the axial vibration of the ultrasonic bone scalpel head into circumferential vibration, thereby achieving the transverse torsional motion required for cutting and grinding human tissue. It can convert the ultrasonic energy of longitudinal vibration into the ultrasonic energy of longitudinal torsional vibration. The longitudinal torsional vibration mode can simultaneously exhibit longitudinal and circumferential vibration, which can greatly reduce cutting noise while completing rapid bone grinding and V-shaped surface cutting.

[0066] In some embodiments, the number of inclined grooves 260 ranges from 2 to 12. For example, the number of inclined grooves 260 can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12. The number of inclined grooves 260 should not be too few, as this would make it difficult to achieve the desired longitudinal torsion effect; nor should the number of inclined grooves 260 be too many, as this would lead to excessive longitudinal torsion and affect the overall effect.

[0067] Preferably, each inclined groove 260 is distributed at equal intervals around the circumference of the tool holder 200, thereby making the longitudinal torsion effect of the tool holder 200 uniformly distributed throughout the circumference.

[0068] In some embodiments, the depth of the groove 260 ranges from 0.2mm to 1.5mm. For example, the depth of the groove 260 can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm. The depth of the groove 260 refers to the distance the groove 260 extends vertically inward from the outer circumferential surface of the tool holder 200. The depth of the groove 260 cannot be too small, as this would make it difficult for the groove 260 to achieve the desired longitudinal torsion effect; conversely, the depth of the groove 260 cannot be too large, as this would lead to excessive longitudinal torsion.

[0069] In some embodiments, the width of the groove 260 ranges from 0.1mm to 3mm. For example, the width of the groove 260 can be 0.1mm, 0.3mm, 0.5mm, 0.7mm, 0.9mm, 1.1mm, 1.3mm, 1.5mm, 1.7mm, 1.9mm, 2.1mm, 2.3mm, 2.5mm, 2.7mm, 2.9mm, or 3mm. The width of the groove 260 refers to its width along the circumference of the tool holder 200, and the width of the groove 260 is evenly distributed along the first direction. The width of the groove 260 cannot be too small, as this would make it difficult to achieve the desired longitudinal torsion effect; nor can the width be too large, as this would lead to excessive longitudinal torsion.

[0070] In some embodiments, please refer to Figure 1 , Figure 7 and Figure 8 The cutter shank 200 includes a first segment 210, a second segment 220, and a third segment 230 arranged sequentially along its axial direction. The outer diameters of the first segment 210, the second segment 220, and the third segment 230 decrease sequentially. A first transition section 240 connects the first segment 210 and the second segment 220, and a second transition section 250 connects the second segment 220 and the third segment 230. The end of the third segment 230 away from the second segment 220 is connected to the cutting section 100. The first segment 210 is connected to the transducer. A slanted groove 260 is formed in the second segment 220. By dividing the cutter shank 200 into the first segment 210, the second segment 220, and the third segment 230, whose outer diameters decrease sequentially along the axial direction of the cutter shank 200, a large amplitude ratio is achieved between the head and tail ends of the ultrasonic bone scalpel tip, thereby greatly increasing the cutting speed. Meanwhile, by setting a first transition section 240 between the first rod section 210 and the second rod section 220, and setting a second transition section 250 between the second rod section 220 and the third rod section 230, the outer diameter of the ultrasonic bone scalpel tip gradually changes from the first rod section 210 to the second rod section 220, and gradually changes from the second rod section 220 to the third rod section 230, thereby reducing the concentrated stress at the connection and reducing the processing difficulty.

[0071] In some embodiments, please refer to Figure 8 The ultrasonic bone scalpel tip also has a through hole 300 that extends through the scalpel 200 and the cutting section 100 along the axial direction of the scalpel 200. The through hole 300 can increase the torsional efficiency of the ultrasonic scalpel, reduce noise, and can also be used to transport coolant to the cutting section 100 to remove the heat generated by the cutting section 100, or to draw out liquid near the cutting section 100 through the through hole 300.

[0072] Optionally, the through hole 300 is located at the center of the tool holder 200, and the through hole 300 is coaxial with the tool holder 200.

[0073] Optionally, the through hole 300 is a hole with a constant inner diameter; or, the through hole 300 can also be a stepped hole; or, the through hole 300 is a hole with a gradually changing inner diameter.

[0074] Optionally, the depth of the groove 260 is less than the thickness of the sidewall of the tool holder 200, and the groove 260 is not connected to the through hole 300.

[0075] In some embodiments, please refer to Figure 9 and Figure 10 The cutting section 100 also includes two drainage surfaces 130, which are connected to two cutting surfaces 110 respectively. The two drainage surfaces 130 form an included angle with each other and are used to drain external coolant to the two cutting surfaces 110. That is, the cutting section 100 is pyramidal in shape. The external coolant refers to coolant delivered to the blade surface through other structures. For example, a sleeve can be fitted over the ultrasonic bone scalpel blade, and coolant can be delivered between the ultrasonic bone scalpel blade and the sleeve. When the coolant flows to the drainage surfaces 130, it can be drained to the cutting surfaces 110, thereby cooling each cutting surface 110. This ensures that the temperature of the ultrasonic bone scalpel blade remains within a safe range, reducing damage to tissues and secondary injury to the patient, and guaranteeing surgical safety. It is understood that in other embodiments of this application, the number of drainage surfaces 130 may also be three or more.

[0076] In some embodiments, please refer to Figure 9 and Figure 10 The ultrasonic bone scalpel tip also has a first drainage groove 140 for introducing external coolant, wherein two drainage surfaces 130 extend from opposite sides of the first drainage groove 140 to the corresponding cutting surfaces 110. The first drainage groove 140 allows the external coolant to be stored within it and possesses a certain flow driving force, thereby ensuring that the coolant flows evenly to the drainage surfaces 130 on both sides. It is understood that in other embodiments of this application, the ultrasonic bone scalpel tip may not have a first drainage groove 140, in which case the two drainage surfaces 130 are connected; this is not a limiting factor.

[0077] Optionally, the first drainage groove 140 extends from the first end 101 of the cutting section 100 to pass through the second end 102.

[0078] In some embodiments, please refer to Figure 9A second drainage groove 131 is formed concavely on the drainage surface 130, extending from the first drainage groove 140 to the cutting groove 111. This arrangement allows the coolant in the first drainage groove 140 to be quickly guided into the cutting groove 111 through the second drainage groove 131, thereby rapidly reducing the temperature of the ultrasonic bone scalpel tip and enabling the coolant to be used as cutting fluid. Simultaneously, the coolant in the first drainage groove 140 can also be drained from the drainage surface 130 into the cutting surface 110 to reduce the cutting temperature of the cutting surface 110.

[0079] In some other embodiments of this application, the extension direction of the cutting groove 111 can also be set to form a first angle with the axial direction of the tool holder 200 that is not 90 degrees. That is, the extension direction of the cutting groove 111 is neither perpendicular nor parallel to the axial direction of the tool holder 200. This way, when the ultrasonic bone scalpel head vibrates along the axial direction of the tool holder 200, the coolant in the cutting groove 111 will be drawn outward along the extension direction of the cutting groove 111 and will not impact the wall surface 1111 perpendicularly, thereby reducing noise.

[0080] Preferably, the first included angle is in the range of 20 degrees to 70 degrees, that is, the first included angle can be 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, or 70 degrees, etc. The first included angle cannot be too large, otherwise the noise reduction effect will be poor; the first included angle cannot be too small, otherwise the cutting effect will be poor. By limiting the first included angle to 20 degrees to 70 degrees, the noise reduction effect can be improved while ensuring the cutting effect.

[0081] In other embodiments of this application, the wall surface 1111 of the cutting tooth 112 facing the cutting groove 111 can also be configured to be perpendicular to the axial direction of the tool holder 200. Simultaneously, a dividing groove 1122 is provided on the cutting tooth 112, extending at least through the top region of the cutting tooth 112 along the axial direction of the tool holder 200. The dividing groove 1122 enables communication between adjacent cutting grooves 111, reducing noise generated by the coolant in the cutting groove 111 due to impact with the wall surface 1111.

[0082] In some other embodiments of this application, the cutting portion 100 may not include the two drainage surfaces 130 and the first drainage groove 140, but instead connect the two cutting surfaces 110 to opposite ends through a plane to form the cutting portion 100 into a triangular pyramid shape.

[0083] On the other hand, embodiments of this application also provide an ultrasonic bone scalpel system, including the aforementioned ultrasonic bone scalpel head. Furthermore, the ultrasonic bone scalpel may also include an ultrasonic main unit and a transducer, with the transducer connected to the ultrasonic bone scalpel head. The ultrasonic main unit provides electrical energy to the transducer, which converts the electrical energy into mechanical vibration. The ultrasonic bone scalpel system of this application, through the aforementioned ultrasonic bone scalpel head configuration, can reduce the noise generated during application.

[0084] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify or combine the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications, combinations or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An ultrasonic bone scalpel tip, characterized in that, The tool includes a tool holder (200) and a cutting section (100) connected to one end of the tool holder (200). The cutting section (100) is a multi-faceted pyramid structure and has multiple sides. The multiple sides include at least two connected cutting surfaces (110). The cutting surfaces (110) have at least two cutting grooves (111). Cutting teeth (112) are formed on opposite sides of the cutting grooves (111). The cutting teeth (112) have wall surfaces (1111) facing the cutting grooves (111). The relative distance between at least a portion of the two wall surfaces (1111) located on opposite sides of the cutting grooves (111) gradually increases from the bottom of the cutting grooves (111) to the opening direction.

2. The ultrasonic bone scalpel head as described in claim 1, characterized in that, The extending direction of the cutting groove (111) forms a first angle with the axial direction of the tool holder (200) that is not 90 degrees. Alternatively, the extending direction of the cutting groove (111) is perpendicular to the axial direction of the tool holder (200).

3. The ultrasonic bone scalpel tip as described in claim 1, characterized in that, The extending direction of the cutting groove (111) forms a first angle with the axial direction of the tool holder (200), and the first angle ranges from 20 degrees to 70 degrees.

4. The ultrasonic bone scalpel tip according to any one of claims 1 to 3, characterized in that, Each of the cutting grooves (111) is distributed sequentially along the axial direction of the tool holder (200).

5. The ultrasonic bone scalpel tip according to any one of claims 1 to 3, characterized in that, The cutting tooth (112) has a dividing groove (1122) that extends at least through the top region of the cutting tooth (112) along the axial direction of the tool holder (200).

6. The ultrasonic bone scalpel tip as described in claim 5, characterized in that, The dividing grooves (1122) on two adjacent cutting teeth (112) are staggered along the extension direction of the cutting teeth (112).

7. The ultrasonic bone scalpel tip according to any one of claims 1 to 3, characterized in that, The cutting section (100) further includes a first drainage groove (140) and at least two drainage surfaces (130), wherein the two drainage surfaces (130) extend from opposite sides of the first drainage groove (140) to the corresponding cutting surface (110); the drainage surface (130) is formed with a second drainage groove (131), which extends from the first drainage groove (140) to the cutting groove (111).

8. The ultrasonic bone scalpel tip according to any one of claims 1 to 3, characterized in that, The outer peripheral surface of the tool holder (200) is formed with a plurality of inclined grooves (260) that are distributed circumferentially and extend spirally.

9. The ultrasonic bone scalpel tip according to any one of claims 1 to 3, characterized in that, The ultrasonic bone scalpel tip also has a through hole (300) that extends through the scalpel (200) and the cutting part (100) along the axial direction of the scalpel (200).

10. An ultrasonic bone scalpel system, characterized in that, The device includes an ultrasound host, a transducer, and an ultrasonic bone scalpel head as described in any one of claims 1 to 9, wherein the transducer is connected to the ultrasonic bone scalpel head, the ultrasound host provides electrical energy to the transducer, and the transducer is used to convert the electrical energy into mechanical vibration.

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