Composite vibration transducer, ultrasonic operation osteotome and ultrasonic operation system

Abstract

The invention provides a composite vibration transducer, an ultrasonic operation osteotome and an ultrasonic operation system. The composite vibration transducer comprises a transducer body and a composite vibration converter, one end of the composite vibration converter is detachably connected with the transducer body, the other end of the composite vibration converter is detachably connected with the tool bit, and at least one groove is formed in the outer wall face of the composite vibration converter. And when the composite vibration converter and the energy converter are in a detached state, the energy converter can be detachably connected with the tool bit. The length of the composite vibration converter is integral multiples of the half-wavelength of longitudinal waves, transmitted to the tool bit through the transducer, of longitudinal vibration generated by the piezoelectric ceramics in the resonance system, and the resonance system is formed by a structural system formed by connecting the transducer and the tool bit. Compared with the prior art, the composite vibration transducer has the advantages that the cost can be reduced, and the defects that the cutting and bone grinding effects are poor due to the arrangement of a motor or the composite vibration transducer is difficult to hold by an operator due to large vibration can be overcome.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and in particular to a composite vibration transducer, an ultrasonic surgical osteotome and an ultrasonic surgical system. Background Art

[0002] With the rapid development of modern medicine, ultrasonic surgical instruments have been increasingly used in clinical surgical treatments. They apply ultrasonic energy to surgical operations and have the characteristics of fine cutting, safety, tissue selectivity and low-temperature hemostasis. They have greatly enriched the means of surgical operations, improved the quality of surgical operations, and alleviated patients' pain to a certain extent.

[0003] However, traditional ultrasonic cutters can only vibrate back and forth in the longitudinal direction, making bone cutting inefficient. In addition, the friction between the surgical cutter and the wound surface is large, which can easily cause the temperature of the cutting wound surface to rise and even cause thermal damage to the nerves and blood vessels near the wound.

[0004] The prior art also has a cutter head that can generate compound vibrations, which can also achieve the effect of compound vibrations when connected to a transducer, but the cutter head is generally a disposable consumable. Each processing requires a bevel groove feature to be processed on the tool rod of the cutter head, and the transducer is used hundreds to thousands of times. This makes the operation inconvenient and the processing cost high.

[0005] By improving the handle and adding a motor to drive the tool to rotate, the longitudinal torsion effect in the compound vibration can also be achieved, but on the one hand, the motor drive will jump when it first contacts hard tissue and will damage soft tissue when it contacts soft tissue, and it does not have the characteristic of cutting hard but not soft. Although a high-speed motor can effectively improve the cutting efficiency, this ultrasonic handle with a motor has the disadvantages of poor cutting and bone grinding effect or being difficult for the operator to hold due to large vibration. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the prior art in realizing the longitudinal torsional effect in composite vibration, which has high cost, poor cutting and bone grinding effect or is difficult for the operator to hold, and to provide a composite vibration transducer, an ultrasonic surgical bone knife and an ultrasonic surgical system.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] A composite vibration transducer for ultrasonic surgical equipment, the composite vibration transducer comprising a transducer and a composite vibration converter, one end of the composite vibration converter being detachably connected to the transducer, and the other end being detachably connected to a cutter head, and at least one groove being arranged on an outer wall surface of the composite vibration converter;

[0009] Wherein, when the composite vibration converter and the transducer are in a disassembled state, the transducer can also be detachably connected to the cutter head;

[0010] The length of the composite vibration converter is an integer multiple of half the wavelength of the longitudinal wave of the longitudinal vibration generated by the piezoelectric ceramic transmitted to the tool head through the transducer in the resonance system, wherein the resonance system is formed by a structural system consisting of the transducer and the tool head.

[0011] In this solution, when the transducer is detachably connected to the cutter head, the longitudinal vibration of the cutter head is realized under the action of the longitudinal wave; when the transducer is loaded with a composite vibration converter and the composite vibration converter is detachably connected to the cutter head, since a groove is provided on the composite vibration converter, when the longitudinal vibration is transmitted to the position of the groove, the longitudinal vibration can be converted into torsion or lateral vibration to realize the longitudinal torsion or longitudinal bending composite vibration of the cutter head. Compared with the method of machining an inclined groove on the cutter head in the prior art to realize composite vibration, the present application only needs to load a composite vibration converter to realize it, and the cost is greatly reduced. Compared with the method of realizing composite vibration by adding an additional motor in the prior art, the present application only needs to load a composite vibration converter, and the stability when realizing composite vibration is higher, and it can also overcome the defects of poor cutting and bone grinding effects caused by the setting of the motor or the defect of being difficult to be held by the operator due to large vibration. In addition, the length of the composite vibration converter in this solution can keep the frequency of the original resonance system basically unchanged.

[0012] Preferably, the transducer comprises a front cover plate, and the composite vibration converter is threadedly connected to the front cover plate.

[0013] In this solution, the above-mentioned structural setting is adopted, the connection method is simple, and the installation and disassembly of the composite vibration converter and the front cover plate are convenient, and the switching between the longitudinal vibration of the cutter head and the composite vibration is convenient, which is beneficial to reduce the cost of the composite vibration transducer and simplify the structure of the composite vibration transducer.

[0014] Preferably, the front cover plate has a first threaded portion at one end close to the cutter head, and the two ends of the composite vibration converter have a second threaded portion and a third threaded portion respectively;

[0015] The composite vibration converter is threadedly connected to the first threaded portion through the second threaded portion;

[0016] The composite vibration converter is used for threaded connection with the tool head through the third threaded portion.

[0017] In the present solution, the above-mentioned structural setting is adopted, and the composite vibration converter is connected to the front cover plate and the cutter head by threads. The connection method is simple, which facilitates the installation and removal of the composite vibration converter and the front cover plate, and facilitates the switching between the longitudinal vibration of the cutter head and the composite vibration, which is conducive to reducing the cost of the composite vibration transducer and simplifying the structure of the composite vibration transducer. In addition, the front cover plate can be connected to the cutter head or the composite vibration converter through the first threaded portion, that is, when the composite vibration converter needs to be loaded, the original connection structure (i.e., the first threaded portion) can be directly used without the need to set up a structure for connecting the front cover plate to the composite vibration converter, which is conducive to further simplifying the structure of the composite vibration transducer and further reducing the cost of the composite vibration transducer.

[0018] Preferably, the first threaded portion and the third threaded portion are external threads, and the second threaded portion is an internal thread.

[0019] Preferably, the groove is located at one end of the composite vibration converter close to the transducer.

[0020] In this solution, since the location where the composite vibration converter is connected to the transducer is the longitudinal vibration node, the above-mentioned structural arrangement is adopted to help ensure the effect of composite vibration.

[0021] Preferably, the number of the grooves is multiple, and the multiple grooves are evenly distributed along the periphery of the composite vibration converter;

[0022] Wherein, the groove is an oblique groove or a spiral groove.

[0023] In this solution, the above structure is adopted, and according to different usage or setting requirements, the number, shape, angle and depth of the grooves can be adjusted, the longitudinal torsion ratio can be controlled, and the corresponding longitudinal torsion ratio output can be achieved according to the requirements. In addition, multiple grooves are evenly distributed along the periphery of the composite vibration converter, which is convenient for processing and conducive to the stability of the cutter head when performing composite vibration.

[0024] The present invention also provides an ultrasonic surgical bone knife, which comprises a knife head and the above-mentioned composite vibration transducer, wherein the knife head is detachably connected to the composite vibration converter or the transducer.

[0025] In the present scheme, since the composite vibration transducer can realize the conversion between longitudinal vibration and composite vibration, and the cost of realizing composite vibration is low, the stability when realizing composite vibration is high, the cutting and bone grinding effects are better, and it is also easy for the operator to hold, the ultrasonic surgical bone knife including the composite vibration transducer also has the same advantages, that is, the cost of realizing composite vibration of the ultrasonic surgical bone knife is low, the cutting and bone grinding effects are better, and it is also easy for the operator to hold.

[0026] Preferably, the length of the composite vibration converter and the cutter head after assembly is an integer multiple of half the wavelength of the longitudinal wave.

[0027] In the present scheme, since in the resonance system, when the composite vibration converter is not loaded, the connection position between the transducer and the cutter head is at the vibration node, the above-mentioned structural setting is adopted so that after the transducer is loaded with the composite vibration converter and the cutter head, the connection position between the transducer and the composite vibration converter is still at the vibration node, which is beneficial to ensure that the frequency of the overall resonance system remains unchanged.

[0028] Preferably, the length of the blade head is an integer multiple of half the wavelength of the longitudinal wave.

[0029] In this solution, the above structural setting is adopted to further ensure that the frequency of the overall resonant system remains unchanged.

[0030] The present invention also provides an ultrasonic surgical system, which includes the above-mentioned ultrasonic surgical bone knife and an electrosurgical host, wherein the ultrasonic surgical bone knife is electrically connected to the electrosurgical host, the electrosurgical host is used to transmit electrical energy to the ultrasonic surgical bone knife, and the ultrasonic surgical bone knife is used to convert the electrical energy into vibration of the knife head for cutting.

[0031] The positive and progressive effects of the present invention are:

[0032] For the composite vibration transducer in the present invention, when the composite transducer is detachably connected to the cutter head, the longitudinal vibration of the cutter head is realized under the action of the longitudinal wave; when the transducer is loaded with a composite vibration converter and the composite vibration converter is detachably connected to the cutter head, since a groove is provided on the composite vibration converter, when the longitudinal vibration is transmitted to the position of the groove, the longitudinal vibration can be converted into torsion or lateral vibration to realize the longitudinal torsion or longitudinal bending composite vibration of the cutter head. Compared with the method of machining an inclined groove on the cutter head in the prior art to realize composite vibration, the present application only needs to load a composite vibration converter to realize it, and the cost is greatly reduced. Compared with the method of realizing composite vibration by adding an additional motor in the prior art, the present application only needs to load a composite vibration converter, and the stability when realizing composite vibration is higher, and it can also overcome the defects of poor cutting and bone grinding effects caused by the setting of the motor or the defects of being difficult to be held by the operator due to large vibration. In addition, the length of the composite vibration converter in this scheme can keep the frequency of the original resonance system basically unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of a composite vibration transducer according to an embodiment of the present invention.

[0034] Figure 2 FIG. 4 is a schematic diagram of the internal structure of a composite vibration transducer according to another embodiment of the present invention.

[0035] Figure 3 The figure is a schematic structural diagram of a front cover plate of a composite vibration transducer according to an embodiment of the present invention.

[0036] Figure 4 The figure is a schematic structural diagram of a composite vibration converter of a composite vibration transducer according to an embodiment of the present invention.

[0037] Figure 5 It is a schematic diagram of the structure of an ultrasonic surgical bone knife according to an embodiment of the present invention, corresponding to a schematic diagram of the structure of a composite vibration transducer connected to a knife head when the composite vibration transducer is not loaded with a composite vibration converter.

[0038] Figure 6 This is another structural schematic diagram of an ultrasonic surgical bone knife according to an embodiment of the present invention, corresponding to a structural schematic diagram of a composite vibration transducer connected to a knife head when the composite vibration transducer is loaded with the composite vibration converter.

[0039] Figure 7 For Figure 6 Schematic diagram of the corresponding internal structure.

[0040] Description of reference numerals:

[0041] 10 Transducers

[0042] 20Front cover

[0043] 201 first thread portion

[0044] 30 Flange

[0045] 40 composite vibration converter

[0046] 401 slot

[0047] 402 third thread portion

[0048] 50 blades

[0049] 60 torque wrench action point

[0050] P1 The connection between the cutter head and the front cover

[0051] The connection between the P2 front cover and the composite vibration converter

[0052] The connection between the P3 cutter head and the composite vibration converter DETAILED DESCRIPTION

[0053] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0054] like Figures 1 to 7As shown, this embodiment provides a composite vibration transducer for ultrasonic surgical equipment, the composite vibration transducer includes a transducer 10 and a composite vibration converter 40, one end of the composite vibration converter 40 is detachably connected to the transducer 10, and the other end is detachably connected to the cutter head 50, and at least one groove 401 is provided on the outer wall surface of the composite vibration converter 40. When the composite vibration converter 40 and the transducer 10 are in a disassembled state, the transducer 10 can also be detachably connected to the cutter head 50. The length of the composite vibration converter 40 is an integer multiple of half the wavelength of the longitudinal wave generated by the piezoelectric ceramic and transmitted to the cutter head 50 through the transducer 10 in the resonance system, wherein the resonance system is formed by the structural system composed of the transducer 10 and the cutter head 50.

[0055] In this embodiment, when the transducer 10 is detachably connected to the cutter head 50, the longitudinal vibration of the cutter head 50 is realized under the action of the longitudinal wave; when the transducer 10 is loaded with the composite vibration converter 40 and the composite vibration converter 40 is detachably connected to the cutter head 50, since the composite vibration converter 40 is provided with a groove 401, when the longitudinal vibration is transmitted to the position of the groove 401, the longitudinal vibration can be converted into torsion or lateral vibration to realize the longitudinal torsion or longitudinal bending composite vibration of the cutter head 50. Compared with the method of machining the inclined groove 401 on the cutter head 50 in the prior art to realize the composite vibration, the present application only needs to load the composite vibration converter 40 to realize it, and the cost is greatly reduced. Compared with the method of realizing the composite vibration by adding an additional motor in the prior art, the present application only needs to load the composite vibration converter 40, and the stability when realizing the composite vibration is higher, and it can also overcome the defects of poor cutting and bone grinding effect caused by the setting of the motor or the defect of being difficult to be held by the operator due to large vibration. In addition, the length of the composite vibration converter 40 in this scheme can keep the frequency of the original resonance system basically unchanged.

[0056] It should be noted that longitudinal waves refer to waves along the direction of sound propagation.

[0057] The following is a brief description of the contents related to the principles of ultrasonic longitudinal vibration and ultrasonic composite (longitudinal-torsional) vibration in this embodiment.

[0058] About Ultrasonic Longitudinal Vibration

[0059] The wave velocity of titanium alloy is 4871.23 m / s, the resonant frequency is set to 25.5±0.5 kHz, and the wavelength range of longitudinal wave in titanium alloy is between 187.34 mm and 194.84 mm.

[0060] The ultrasonic vibration (resonance) system composed of the transducer 10 and the cutter head 50 usually has an overall length that is an integer multiple of half the wavelength of the longitudinal wave. This length can ensure that the output longitudinal displacement is maximum. There will be slight differences when the shape cross-section changes significantly. For example, the cross-section changes dramatically at the flange 30 position, and includes piezoelectric ceramics and an aluminum alloy front cover plate 20, with an overall length of 214.50 mm.

[0061] About Ultrasonic Longitudinal-Torsional Vibration

[0062] When the longitudinal vibration of the longitudinal wave is transmitted to the interface between the slot 401 and the air, the axial motion of the particle there is decomposed into longitudinal and tangential motions, and the tangential velocity causes the particle to twist, generating torque and producing longitudinal-torsional vibrations on a macro scale.

[0063] It can be seen from the above that the wavelength range is between 187.34mm-194.84mm. Since the length of the original resonance system is 214.5mm, the frequency of the original resonance system can be maintained unchanged only when the length of the designed composite vibration converter 40 is an integer multiple of half the wavelength. The length of the composite vibration converter 40 is controlled to be around 93-97mm. When the length of the embodiment is 96.2mm, its frequency changes from 25.498KHz to 25.510KHz, which remains basically unchanged.

[0064] Regarding the groove 401 provided on the composite vibration converter 40, in an embodiment, the following description is required:

[0065] (1) Regarding the number of the grooves 401, in this embodiment, it is set to be a plurality of grooves 401, and the plurality of grooves 401 are evenly distributed along the outer circumference of the composite vibration converter 40. As for the specific number of the grooves 401, there is no specific restriction in this embodiment, and it can be set according to actual needs;

[0066] (2) Regarding the shape of the groove 401, it can be an oblique groove 401 or a spiral groove 401;

[0067] (3) According to different usage or setting requirements, the number, shape, angle and depth of the grooves 401 can be adjusted to control the longitudinal torsion ratio, thereby achieving the corresponding longitudinal torsion ratio output according to the requirements. In addition, the plurality of grooves 401 are evenly distributed along the periphery of the composite vibration converter 40, which is convenient for processing and conducive to the stability of the cutter head 50 during composite vibration;

[0068] (4) In the preferred configuration, the groove 401 is located at one end of the composite vibration converter 40 close to the transducer 10. Since the composite vibration converter 40 is connected to the transducer 10 at the longitudinal vibration node, the above-mentioned structural configuration is conducive to ensuring the composite vibration effect.

[0069] like Figure 1 to Figure 2 , Figures 4 to 7 As shown, the transducer 10 includes a front cover plate 20, and the composite vibration converter 40 is threadedly connected to the front cover plate 20. With such a configuration, the connection method is simple, and it is convenient to install and disassemble the composite vibration converter 40 and the front cover plate 20, and it is convenient to switch between the longitudinal vibration and the composite vibration of the cutter head 50, which is beneficial to reducing the cost of the composite vibration transducer and simplifying the structure of the composite vibration transducer.

[0070] In addition, a flange 30 is provided on the front cover plate 20, and the flange 30 is also located at the vibration node, so as to facilitate the fixation of the transducer 10. The front cover plate 20 also schematically shows a torque wrench action point 60 for cooperating with a torque wrench.

[0071] Among them, the vibration node is also called the mechanical vibration mode node. The mode node refers to the intersection node of the mode shape and the original shape of the structure at a certain order of natural frequency. The amplitude at the mode node is zero, and the vibration directions on both sides of the vibration node are opposite.

[0072] Specifically, the front cover plate 20 has a first threaded portion 201 at one end close to the cutter head 50, and the two ends of the composite vibration converter 40 respectively have a second threaded portion and a third threaded portion 402. The composite vibration converter 40 is threadedly connected to the first threaded portion 201 through the second threaded portion. The composite vibration converter 40 is threadedly connected to the cutter head 50 through the third threaded portion 402.

[0073] Accordingly, the composite vibration converter 40 is connected to the front cover plate 20 and the cutter head 50 by threads, and the connection method is simple, which facilitates the installation and disassembly of the composite vibration converter 40 and the front cover plate 20, and facilitates the switching between the longitudinal vibration and the composite vibration of the cutter head 50, which is beneficial to reduce the cost of the composite vibration transducer and simplify the structure of the composite vibration transducer. In addition, the front cover plate 20 can be connected to the cutter head 50 or the composite vibration converter 40 through the first threaded portion 201, that is, when the composite vibration converter 40 needs to be loaded, the original connection structure (i.e., the first threaded portion 201) can be directly used without the need to set up a structure for connecting the front cover plate 20 with the composite vibration converter 40, which is beneficial to further simplify the structure of the composite vibration transducer and further reduce the cost of the composite vibration transducer.

[0074] As an example, in this embodiment, the first threaded portion 201 and the third threaded portion 402 are external threads, and the second threaded portion is an internal thread.

[0075] In other alternative embodiments, the first threaded portion 201 and the third threaded portion 402 may be configured as internal threads, and the second threaded portion may be configured as external threads.

[0076] like Figure 5As shown, it shows a schematic diagram of the structure of the composite vibration transducer connected to the cutter head 50 when the composite vibration converter 40 is not loaded, that is, a schematic diagram of the structure of the front cover plate 20 connected to the cutter head 50. Among them, P1 in the figure schematically shows the connection between the cutter head 50 and the front cover plate 20.

[0077] like Figure 6 and Figure 7 As shown, it shows a schematic diagram of the structure of the composite vibration transducer when it is loaded with the composite vibration converter 40 and connected to the cutter head 50, that is, it shows a schematic diagram of the structure of the composite vibration converter 40 connected to the cutter head 50. Among them, Figure 6 P2 in the figure schematically shows the connection between the front cover plate 20 and the compound vibration converter 40 , and P3 schematically shows the connection between the cutter head 50 and the compound vibration converter 40 .

[0078] This embodiment also provides a specific ultrasonic surgical device, namely, an ultrasonic surgical osteotome. Figures 5 to 7 As shown, the ultrasonic surgical bone knife includes a knife head 50 and the above-mentioned composite vibration transducer, and the knife head 50 is detachably connected to the composite vibration converter 40 or the transducer 10.

[0079] Among them, since the composite vibration transducer can realize the conversion between longitudinal vibration and composite vibration, and the cost of realizing composite vibration is low, the stability when realizing composite vibration is high, the cutting and bone grinding effects are better, and it is also easy for the operator to hold, therefore, the ultrasonic surgical bone knife containing the composite vibration transducer also has the same advantages, that is, the ultrasonic surgical bone knife realizes composite vibration at a low cost, has better cutting and bone grinding effects, and is also easy to be held by the operator.

[0080] Furthermore, in a preferred configuration, the length of the composite vibration converter 40 and the cutter head 50 after assembly is an integer multiple of a half wavelength of the longitudinal wave.

[0081] Among them, since in the resonance system, when the composite vibration converter 40 is not loaded, the connection position between the transducer 10 and the cutter head 50 is at the vibration node, the above-mentioned structural setting is adopted, so that after the transducer 10 is loaded with the composite vibration converter 40 and the cutter head 50, the connection position between the transducer 10 and the composite vibration converter 40 is still at the vibration node, which is beneficial to ensure that the frequency of the overall resonance system remains unchanged.

[0082] Furthermore, the length of the blade head 50 can be set to an integral multiple of a half wavelength of the longitudinal wave. This arrangement is conducive to further ensuring that the frequency of the overall resonance system remains unchanged.

[0083] It should be noted that the length of the cutter head 50 is preferably set to an integer multiple of the half wavelength of the longitudinal wave. In other alternative embodiments, the length of the cutter head 50 is not limited thereto, as long as it can keep the frequency of the resonant system unchanged after the composite vibration converter 40 is loaded.

[0084] The rotation angle of the blade head 50 of the ultrasonic surgical bone knife provided in this embodiment is less than 360°, so that when transmitting composite vibration, the damage to soft tissue when cutting hard tissue can be further reduced.

[0085] This embodiment also provides an ultrasonic surgical system, which includes the above-mentioned ultrasonic surgical bone knife and an electrosurgical host. The ultrasonic surgical bone knife is electrically connected to the electrosurgical host. The electrosurgical host is used to transmit electrical energy to the ultrasonic surgical bone knife, and the ultrasonic surgical bone knife is used to convert the electrical energy into vibration of the blade head 50 for cutting.

[0086] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A composite vibration transducer for ultrasonic surgical equipment, characterized in that: The composite vibration transducer comprises a transducer and a composite vibration converter, one end of the composite vibration converter is detachably connected to the transducer, and the other end is detachably connected to the cutter head, and at least one groove is arranged on the outer wall surface of the composite vibration converter; Wherein, when the composite vibration converter and the transducer are in a disassembled state, the transducer can also be detachably connected to the cutter head; The length of the composite vibration converter is an integer multiple of half the wavelength of the longitudinal wave of the longitudinal vibration generated by the piezoelectric ceramic transmitted to the tool head through the transducer in the resonance system, wherein the resonance system is formed by a structural system consisting of the transducer and the tool head.

2. The composite vibration transducer according to claim 1, characterized in that: The transducer comprises a front cover plate, and the composite vibration converter is threadedly connected to the front cover plate.

3. The composite vibration transducer according to claim 2, characterized in that: The front cover plate has a first threaded portion at one end close to the cutter head, and the two ends of the composite vibration converter have a second threaded portion and a third threaded portion respectively; The composite vibration converter is threadedly connected to the first threaded portion through the second threaded portion; The composite vibration converter is used for threaded connection with the tool head through the third threaded portion.

4. The composite vibration transducer according to claim 3, characterized in that: The first threaded portion and the third threaded portion are external threads, and the second threaded portion is an internal thread.

5. The composite vibration transducer according to claim 1, characterized in that: The groove is located in the composite vibration converter at one end close to the transducer.

6. The composite vibration transducer according to any one of claims 1 to 5, characterized in that: The number of the grooves is multiple, and the multiple grooves are evenly distributed along the outer circumference of the composite vibration converter; Wherein, the groove is an oblique groove or a spiral groove.

7. An ultrasonic surgical osteotome, characterized in that: It comprises a cutter head and the composite vibration transducer according to any one of claims 1 to 6, wherein the cutter head is detachably connected to the composite vibration converter or the transducer.

8. The ultrasonic surgical osteotome according to claim 7, characterized in that: The length of the composite vibration converter and the cutter head after being assembled is an integral multiple of a half wavelength of the longitudinal wave.

9. The ultrasonic surgical osteotome according to claim 7 or 8, characterized in that: The length of the blade head is an integral multiple of half the wavelength of the longitudinal wave.

10. An ultrasonic surgical system, characterized in that: It includes an ultrasonic surgical bone knife and an electrosurgical host as described in any one of claims 7 to 9, wherein the ultrasonic surgical bone knife is electrically connected to the electrosurgical host, the electrosurgical host is used to transmit electrical energy to the ultrasonic surgical bone knife, and the ultrasonic surgical bone knife is used to convert the electrical energy into vibration of the blade head for cutting.

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