Ultrasonic bone knife head

Abstract

The invention discloses an ultrasonic bone knife head, comprising a knife bar (1), a knife head end (2) and a liquid injection part (3), one end of the liquid injection part (3) is connected to the knife bar (1), and the other end of the liquid injection part (3) is connected to the knife head end (2). The ultrasonic bone knife head also comprises a hollow liquid injection channel (10), the hollow liquid injection channel (10) penetrates from the tail end of the knife bar (1) along the axial direction of the knife bar (1) to the liquid injection part (3), and a transverse liquid guide channel (20) is provided in the liquid injection part (3) and is transversely penetrated along the axis of the knife bar (1) substantially perpendicular to the axis of the knife bar (1), the transverse liquid guide channel (20) is connected to the hollow liquid injection channel (10), and the transverse liquid guide channel (20) forms an opening on the side of the liquid injection part (3). The ultrasonic bone knife head of the invention allows the cooling liquid to fully flow to the knife head without being dispersed by ultrasonic vibration excitation, thereby ensuring that the end of the knife head is fully cooled during use.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to an ultrasonic bone knife head. Background Art

[0002] In orthopedic surgery, ultrasonic bone knives are often used to cut, grind, plan, scrape or shape bones. The current ultrasonic bone knife blade is a blade that is mainly used for cutting. This blade is in line with the doctor's usage habits, provides a good hand feel, and has a very suitable cutting speed. However, the cooling of the blade blade has always been a big problem. The traditional methods include direct cooling and hollow cooling. Fig.16 and Fig.17 The ultrasonic bone knife head of the prior art is shown. Fig.16 As shown, the ultrasonic bone knife head using direct cooling in the traditional method includes a knife rod 1' and a knife head end 2'. Although the direct cooling method is simple and easy to implement, the cooling liquid flow is easily stimulated and dispersed by the knife head when falling, thereby reducing the cooling effect. Fig.17 The figure shows an ultrasonic bone knife blade using a hollow cooling method in the traditional method, in which a hollow injection groove 10' is formed. Although the hollow cooling method allows the cooling liquid to directly reach the blade end 2', the existence of the hollow groove 10' destroys the complete connection structure of the blade, which reduces the life of the blade, and the blade is easily broken into fragments and invades the body tissue, causing medical accidents. Summary of the invention

[0003] The object of the present invention is to provide an ultrasonic bone knife head, which includes a knife rod, a knife head end and an injection part, one end of the injection part is connected to the knife rod, and the other end of the injection part is connected to the knife head end. The ultrasonic bone knife head also includes a hollow injection channel, and the hollow injection channel runs from the tail end of the knife rod to the injection part along the axial direction of the knife rod. A transverse liquid guide channel is provided in the injection part, which runs transversely along the axis of the knife rod and is roughly perpendicular to the axis of the knife rod. The transverse liquid guide channel is connected to the hollow injection channel, and the transverse liquid guide channel forms an opening on the side of the injection part.

[0004] In the ultrasonic bone knife blade of the present invention, preferably, the liquid injection portion and the blade end portion have different thicknesses, and the liquid injection portion and the blade end portion are transitionally connected via a wedge-shaped transition portion.

[0005] In the ultrasonic bone knife blade of the present invention, preferably, the angle between the inclined plane of the wedge-shaped transition portion and the axial direction of the blade end is less than 10 degrees.

[0006] In the ultrasonic bone knife blade of the present invention, preferably, the shape of the blade end is a plane sheet with two roughly parallel wide planes or a plane wedge with two wide planes sandwiched at a certain angle.

[0007] In the ultrasonic bone knife blade of the present invention, preferably, a cutting portion is formed at the front end of the blade end, and the cutting portion is semicircular, quarter-circular, or hook-shaped.

[0008] In the ultrasonic bone knife blade of the present invention, preferably, the blade end is bent toward one side along a direction perpendicular to a wide plane of the blade end.

[0009] In the ultrasonic bone knife blade of the present invention, preferably, the angle between the blade end and the central axis of the blade rod is 0 to 30 degrees.

[0010] In the ultrasonic bone knife blade of the present invention, preferably, the blade end is bent toward one side along a direction parallel to the wide plane of the blade end.

[0011] In the ultrasonic bone knife blade of the present invention, preferably, the angle between the blade end and the central axis of the blade rod is 0 to 45 degrees.

[0012] In the ultrasonic bone knife blade of the present invention, preferably, cutting teeth are formed on one side or both sides of the blade at the end of the blade.

[0013] In the ultrasonic bone knife head of the present invention, preferably, the cutting teeth are pointed teeth or square teeth, and the tooth tips of the cutting teeth all protrude forward along the axial direction of the knife rod.

[0014] In the ultrasonic bone knife blade of the present invention, preferably, the liquid injection portion is cylindrical, and is sequentially formed with a thick portion and a thin portion along the length from the blade rod to the end of the blade, and two liquid outlet surfaces roughly parallel to the wide plane of the end of the blade are formed in the thin portion, the two liquid outlet surfaces are roughly parallel to each other, and the transverse liquid guide channel forms openings at the two liquid outlet surfaces, respectively.

[0015] Through the above technical solution, the ultrasonic bone knife head of the present invention fully utilizes the structural characteristics of the knife head, and by providing an axial hollow liquid injection channel on the knife rod and a transverse liquid guide channel on the liquid injection part, the ultrasonic cooling liquid passes through the hollow liquid injection channel and flows out from the side opening of the transverse liquid guide channel. As a result, the ultrasonic bone knife head of the present invention can make the cooling liquid fully flow to the knife head without being dispersed by ultrasonic vibration excitation, ensuring that the end of the knife head is fully cooled during use, while ensuring the integrity of the knife head structure, ensuring the life of the knife head, avoiding the risk of the knife head breaking into pieces and invading body tissue when it breaks, and improving the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a stereoscopic view showing an ultrasonic bone knife head with a liquid injection portion of the present invention;

[0017] Figure 2 1. is a front view showing an ultrasonic bone knife head with a liquid injection portion of the present invention;

[0018] Figure 3 It is a front view of the ultrasonic bone knife head according to the first embodiment of the present invention;

[0019] Figure 4 is a top view of the ultrasonic bone knife head according to the first embodiment of the present invention;

[0020] Figure 5 is a stereoscopic diagram of an ultrasonic bone cutting tool head according to a first embodiment of the present invention;

[0021] Figure 6 It is a partial enlarged view of the end of the blade of the ultrasonic bone knife blade according to the first embodiment of the present invention;

[0022] Figure 7 is a stereoscopic view of an ultrasonic bone knife head according to a second embodiment of the present invention;

[0023] Figure 8 It is a partial enlarged view of the end of the blade of the ultrasonic bone knife blade according to the second embodiment of the present invention;

[0024] Fig. 9 is a front view of an ultrasonic bone knife head according to a third embodiment of the present invention;

[0025] Fig.10 is a stereoscopic view of an ultrasonic bone cutting tool head according to a fourth embodiment of the present invention;

[0026] Fig.11 is a front view of an ultrasonic bone knife head according to a fourth embodiment of the present invention;

[0027] Fig.12 is a top view of an ultrasonic bone knife head according to a fifth embodiment of the present invention;

[0028] Fig.13 is a stereoscopic view of an ultrasonic bone cutting tool head according to a fifth embodiment of the present invention;

[0029] Fig.14 is a stereoscopic view of an ultrasonic bone knife head according to a sixth embodiment of the present invention;

[0030] Fig.15 is a top view of an ultrasonic osteotome blade head according to a sixth embodiment of the present invention;

[0031] Fig.16 It is a stereoscopic diagram of a direct cooling ultrasonic bone knife head in the prior art;

[0032] Fig.17 It is a front view of a hollow cooling ultrasonic bone knife head in the prior art.

[0033] Reference numerals:

[0034] 1', 1 ~ knife bar, 2', 2 ~ knife head end, 10' ~ hollow groove, 3 ~ liquid injection part, 4 ~ wedge-shaped transition part, 5 ~ liquid outlet surface, 10 ~ hollow liquid injection channel, 20 ~ transverse liquid guide channel, 21 ~ cutting tooth, 22 ~ cutting part, 23 ~ wide plane, 31 ~ thick part, 32 ~ thin part. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "lateral", "vertical" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. Among them, "wide plane" is relative to the plane wedge, and "thick part" and "thin part" are also relative to each other.

[0037] In addition, in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The present invention is further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0039] Figure 1 , Figure 2 The main structure of the ultrasonic bone knife head of the present invention is shown. Figure 1 is a stereoscopic view showing an ultrasonic bone knife head with a liquid injection portion of the present invention, Figure 21 is a front view showing the ultrasonic bone knife head with a liquid injection portion of the present invention. Figure 1 , Figure 2 As shown, the ultrasonic bone knife head of the present invention includes a knife rod 1, a knife head end 2 and an injection part 3, one end of the injection part 3 is connected to the knife rod 1, and the other end of the injection part 3 is connected to the knife head end 2. The ultrasonic bone knife head also includes a hollow injection channel 10, and the hollow injection channel 10 penetrates from the tail end of the knife rod 1 along the axial direction of the knife rod 1 to the injection part 3. A transverse liquid guide channel 20 is provided in the injection part 3, which is transversely penetrated along the axis of the knife rod 1 and is roughly perpendicular to the axis of the knife rod 1. The transverse liquid guide channel 20 is connected to the hollow injection channel 10 and forms an opening on the side of the injection part 3.

[0040] Figure 3 to Figure 6 The structure of the ultrasonic bone cutting tool head according to the first embodiment of the present invention is shown. Figure 3 is a front view of the ultrasonic bone knife head according to the first embodiment of the present invention, Figure 4 is a top view of the ultrasonic bone knife head according to the first embodiment of the present invention; Figure 5 is a stereoscopic diagram of an ultrasonic bone cutting tool head according to a first embodiment of the present invention; Figure 6 FIG. 1 is a partial enlarged view of the end of the ultrasonic bone cutting head of the first embodiment of the present invention. Figures 3 to 6 As shown, the ultrasonic bone scalpel head of the first embodiment of the present invention comprises a shank 1, a shank end 2 and a liquid injection portion 3, one end of the liquid injection portion 3 is connected to the shank 1, and the other end of the liquid injection portion 3 is connected to the shank end 2. The ultrasonic bone scalpel head also comprises a hollow liquid injection channel 10, the hollow liquid injection channel 10 penetrates from the tail end of the shank 1 along the axial direction of the shank 1 to the liquid injection portion 3, and a transverse liquid guide channel 20 is provided in the liquid injection portion 3, which is substantially perpendicular to the axis of the shank 1 and is transversely penetrated, and the transverse liquid guide channel 20 is connected to the hollow liquid injection channel 10, and an opening is formed on the side of the liquid injection portion 3. In addition, in the ultrasonic bone scalpel head of the first embodiment of the present invention, a cutting portion 22 in the shape of a quarter circle is formed at the front end of the shank end 2, and a cutting tooth 21 is arranged on a single side of the cutting portion 22. That is, in a normal use state, a cutting tooth 21 is arranged on the upper edge of the shank end 2 of the ultrasonic bone scalpel head. The cutting teeth 21 are sharp teeth, and the tips of the cutting teeth 21 protrude forward along the axial direction of the knife rod 1. Of course, the present invention is not limited thereto, and the cutting teeth 21 may also be arranged at the lower edge of the blade end 2 of the ultrasonic bone knife blade.

[0041] According to the ultrasonic bone knife head of the first embodiment of the present invention, it makes full use of the structural characteristics of the knife head. By setting an axial hollow injection channel 10 on the knife rod 1 and a transverse liquid guide channel 20 on the injection part 3, the ultrasonic cooling liquid passes through the hollow injection channel 10 and flows out from the side opening of the transverse liquid guide channel 20, fully flows to the knife head without being dispersed by ultrasonic vibration excitation, ensuring that the end 2 of the knife head is fully cooled during use. In order to enhance the cutting performance of the ultrasonic bone knife head, a cutting portion 22 can also be formed at the front end of the knife head end 2. A cutting tooth 21 can also be formed on one side of the blade of the knife head end 2, and the tooth tip of the cutting tooth 21 protrudes forward along the axial direction of the knife rod 1. In this way, the ultrasonic cooling liquid flow can be excited forward when it flows to the tooth tip position, and will not be excited and dispersed around, further improving the cooling efficiency of the ultrasonic bone knife head. At the same time, the ultrasonic energy can be more concentrated on the cutting part, improving the cutting efficiency.

[0042] In addition, in the ultrasonic bone knife blade of the first embodiment of the present invention, it is preferred that the thickness of the liquid injection portion 3 is different from that of the blade end 2, and the liquid injection portion 3 and the blade end 2 are transitionally connected by a wedge-shaped transition portion 4. The ultrasonic cooling liquid flowing out from the side opening of the transverse liquid guide channel 20 flows along the wedge-shaped transition portion 4 to fully flow to the blade end 2 without being dispersed by the ultrasonic vibration excitation, ensuring that the blade end 2 is fully cooled during use. The wedge-shaped transition portion 4 is used to connect the liquid injection portion 3 and the blade end 2, and can also ensure the integrity of the blade structure, ensure the strength and life of the blade, avoid the risk of the blade breaking into pieces when it breaks, and improve the safety of the operation. Preferably, the angle between the inclined plane of the wedge-shaped transition portion 4 and the axial direction of the blade end 2 is less than 10 degrees. The wedge-shaped transition portion 4 helps the ultrasonic cooling liquid flow toward the blade end 2 to achieve the purpose of fully cooling the blade end 2.

[0043] In addition, in the ultrasonic bone knife blade of the first embodiment of the present invention, it is preferred that the liquid injection portion 3 is cylindrical, and a thick portion 31 and a thin portion 32 are formed in sequence from the blade rod 1 to the blade end 2, and two liquid outlet surfaces 5 are formed in the thin portion 32, which are roughly parallel to the wide plane 23 of the blade end 2, and the two liquid outlet surfaces 5 are roughly parallel to each other, and the transverse liquid guide channel 20 forms openings at the two liquid outlet surfaces 5. Among them, the thick portion 31 can effectively ensure the integrity of the blade structure, ensure the strength and life of the blade, avoid the risk of breaking into pieces when the blade breaks, and improve the safety of the operation. The thin portion 32 allows the ultrasonic cooling liquid flowing out of the side opening of the transverse liquid guide channel 20 to flow so that it can fully flow to the blade end 2 without being dispersed by the ultrasonic vibration excitation, ensuring that the blade end 2 is fully cooled during use.

[0044] In addition, in the ultrasonic bone knife blade of the first embodiment of the present invention, the shape of the blade end 2 can be a plane sheet with two roughly parallel wide planes 23, or can be a plane wedge with a certain angle between the two wide planes 23. More preferably, the side of the plane wedge perpendicular to the two wide planes 23 is an isosceles trapezoid. Of course, according to different specific usage conditions, the side of the plane wedge perpendicular to the two wide planes 23 can be designed into other shapes, such as a right-angled trapezoid, etc.

[0045] Figure 7 and Figure 8 The ultrasonic bone cutting tool head according to the second embodiment of the present invention is shown. Figure 7 A stereoscopic view of an ultrasonic bone cutting tool head according to a second embodiment of the present invention is shown. Figure 8 FIG. 2 shows a partial enlarged view of the end of the ultrasonic bone knife blade of the second embodiment of the present invention. Figure 7 As shown, the second embodiment of the present invention is basically the same as the first embodiment of the present invention. The ultrasonic bone knife head of the second embodiment of the present invention also includes a cylindrical knife bar 1, a sheet-like knife head end 2, that is, two wide planes 23 and a trapezoidal plane with a certain angle between the two wide planes 23. The injection portion 3 connects the knife bar 1 and the knife head end 2. The hollow injection channel 10 runs through the injection portion 3 from the tail end of the knife bar 1 along the axial direction of the knife bar 1, and the transverse liquid guide channel 20 is arranged on the injection portion 3 along the axis perpendicular to the knife bar 1. The transverse liquid guide channel 20 is connected to the hollow injection channel 10, and the transverse liquid guide channel 20 forms an opening on the side of the injection portion 3. A quarter-circular cutting portion 22 is formed at the front end of the knife head end 2. The difference from the first embodiment is that in the ultrasonic bone knife head of the second embodiment of the present invention, the cutting teeth 21 are formed on both sides of the blade of the knife head end 2, that is, in normal use, the cutting teeth 21 are formed on the upper edge and lower edge of the knife head end 2 of the ultrasonic bone knife. The cutting teeth 21 may be sharp teeth, such as Figure 7 The cutting teeth 21 may also be square teeth, such as Figure 8 shown.

[0046] According to the above structure of the ultrasonic bone knife blade of the second embodiment of the present invention, the structural characteristics of the blade can be fully utilized. By setting an axial hollow injection channel 10 on the blade rod 1 and a transverse liquid guide channel 20 on the injection portion 3, the ultrasonic cooling liquid passes through the hollow injection channel 10 and flows out from the side opening of the transverse liquid guide channel 20, fully flows to the blade without being dispersed by ultrasonic vibration excitation, ensuring that the blade end 2 is fully cooled during use. At the same time, by setting cutting teeth 21 on both sides of the blade end 2, the cutting performance and flexibility of the ultrasonic bone knife blade are enhanced.

[0047] Fig. 9 FIG. 2 shows an ultrasonic bone cutting head according to a third embodiment of the present invention. Fig. 9As shown, the ultrasonic bone knife head of the third embodiment of the present invention is basically similar to the ultrasonic bone knife head of the second embodiment of the present invention, except that the cutting portion 22 formed at the front end of the blade end 2 is semicircular, and the cutting teeth 21 are arranged on both sides of the blade of the blade end 2. That is, in normal use, the upper edge and the lower edge of the blade end 2 of the ultrasonic bone knife are provided with cutting teeth 21. However, the present invention is not limited to this, and the cutting teeth 21 can also be arranged on a single side of the blade of the blade end 2, that is, the cutting teeth 21 are formed on one of the upper edge or the lower edge of the blade end 2 of the ultrasonic bone knife. By improving the shape of the blade end 2, it is possible to cut different parts, thereby making the surgical operation more convenient.

[0048] Fig.10 and Fig.11 The ultrasonic bone cutting head according to the fourth embodiment of the present invention is shown. Fig.10 is a stereoscopic view of an ultrasonic bone knife head according to a fourth embodiment of the present invention, Fig.11 FIG. 4 is a front view of an ultrasonic bone cutting head according to a fourth embodiment of the present invention. Figure 10-11 As shown, the ultrasonic bone scalpel head of the fourth embodiment of the present invention also includes a shank 1, a shank end 2 and a liquid injection part 3, one end of the liquid injection part 3 is connected to the shank 1, and the other end of the liquid injection part 3 is connected to the shank end 2. The ultrasonic bone scalpel head also includes a hollow liquid injection channel 10, which runs from the tail end of the shank 1 along the axial direction of the shank 1 to the liquid injection part 3, and a transverse liquid guide channel 20 is provided in the liquid injection part 3, which is substantially perpendicular to the axis of the shank 1 and is transversely penetrated, and the transverse liquid guide channel 20 is connected to the hollow liquid injection channel 10, and the transverse liquid guide channel 20 forms an opening on the side of the liquid injection part 3. Among them, different from the first embodiment, in the ultrasonic bone scalpel head of the fourth embodiment of the present invention, a hook-shaped cutting part 22 is formed at the front end of the shank end 2, and a cutting tooth 21 is arranged on a single side, i.e., the inner side, of the blade of the shank end 2. That is, in a normal use state, the cutting tooth 21 is arranged on the upper edge of the shank end 2 of the ultrasonic bone scalpel. The cutting teeth 21 are sharp teeth, and the tips of the cutting teeth 21 protrude forward along the axial direction of the knife rod 1. Of course, the present invention is not limited to this, and the cutting teeth 21 can also be arranged at the lower edge, i.e., the outer side, of the blade end 2 of the ultrasonic bone knife blade, and the cutting teeth 21 can also be square teeth.

[0049] In order to enhance the versatility of the ultrasonic osteotome blade, that is, to enable operations on more surgical sites during surgery, the present invention further provides a fifth embodiment and a sixth embodiment. Fig.12 is a top view of an ultrasonic bone knife head according to a fifth embodiment of the present invention, Fig.13 FIG. 5 is a three-dimensional diagram of an ultrasonic bone cutting head according to a fifth embodiment of the present invention. Figure 12-13As shown, the fifth embodiment of the present invention is basically the same as the third embodiment, except that the blade end 2 of the ultrasonic bone knife blade of the fifth embodiment of the present invention is bent toward one side along a direction perpendicular to the wide plane 23 of the blade end 2. Preferably, the angle between the blade end 2 and the central axis of the blade rod 1 is 0 to 30 degrees. In addition, as Fig.12 and Fig.13 As shown, preferably, the bending part of the blade end 2 is located at the wedge-shaped transition part 4, thereby ensuring the strength and life of the ultrasonic bone knife blade and preventing the ultrasonic bone knife blade from being easily broken.

[0050] Figure 14-15 A sixth embodiment of an ultrasonic bone cutting tool head according to the present invention is shown. Fig.14 is a stereoscopic view of an ultrasonic bone knife head according to a sixth embodiment of the present invention, Fig.15 FIG. 6 is a top view of an ultrasonic bone cutting head according to a sixth embodiment of the present invention. Fig.14 and Fig.15 As shown, the difference between the sixth embodiment of the present invention and the second embodiment of the present invention is that the blade end 2 of the ultrasonic bone knife blade of the sixth embodiment of the present invention is bent toward one side along a direction parallel to the wide plane 23 of the blade end 2. Preferably, the angle between the blade end 2 and the central axis of the shank 1 is 0 to 45°. However, the present invention is not limited to this, and the blade end 2 can also be bent at other angles or in other directions. By designing the blade end 2 to be bent toward one side along a direction parallel to the wide plane 23 of the blade end 2, it can facilitate the operator's grip, avoid operator fatigue caused by the operator's wrist being kept at the same tilt angle for a long time, and affect the efficiency and accuracy of the operation.

[0051] It should be noted that the above six embodiments are only representative embodiments of the ultrasonic bone knife of the present invention and are not intended to limit the present invention. That is, of course, depending on the specific usage, the cutting portion of the blade end 2 can also be designed in other shapes, such as a triangle, and the cutting teeth 21 can be set on one side of the blade of the blade end 2, or on both sides of the blade of the blade end 2.

[0052] In summary, the ultrasonic bone knife head of the present invention fully utilizes the structural characteristics of the knife head. By setting an axial hollow injection channel 10 on the knife rod 1 and a transverse liquid guide channel 20 on the injection part 3, the ultrasonic cooling liquid passes through the hollow injection channel 10 and flows out from the side opening of the transverse liquid guide channel 20, fully flows to the knife head without being dispersed by ultrasonic vibration excitation, ensuring that the end 2 of the knife head is fully cooled during use. At the same time, the integrity of the knife head structure can be guaranteed, the strength and life of the knife head can be guaranteed, the danger of breaking into pieces when the knife head breaks can be avoided, and the safety of the operation is improved. The cooling liquid smoothly reaches the knife head, which can ensure that the bone surface being cut in the process of bone cutting maintains a reasonable temperature, which can reduce the probability of bone tissue cell necrosis, and can make the cut bone tissue heal faster, shortening the patient's surgical recovery time. Under this design, by changing the shape of the end of the knife head, the needs of various surgical operation methods and parts can be met. In addition, by setting cutting teeth at the cutting part of the end of the knife head, the energy of the ultrasonic wave can be concentrated to the cutting part to the maximum extent, fully ensuring the efficiency of the operation.

[0053] The tail of the ultrasonic bone knife head of the present invention is connected to a specific ultrasonic transducer, for example, by threaded connection and tightened with a corresponding wrench, and then the ultrasonic transducer is connected to a specific ultrasonic host to start working.

[0054] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An ultrasonic bone knife head, comprising a knife rod (1), a knife head end (2) and a liquid injection part (3), wherein one end of the liquid injection part (3) is connected to the knife rod (1), and the other end of the liquid injection part (3) is connected to the knife head end (2), characterized in that: The ultrasonic bone knife head also includes a hollow injection channel (10), the hollow injection channel (10) penetrates from the rear end of the knife rod (1) along the axial direction of the knife rod (1) to the injection portion (3), the injection portion (3) is sequentially formed with a thick portion (31) and a thin portion (32) along the direction from the knife rod (1) to the knife head end (2), and the shape of the knife head end (2) is a plane sheet with two wide planes (23) roughly parallel to each other or a plane sheet with two wide planes (23) sandwiched between them. The invention relates to a flat wedge-shaped device with a certain angle, wherein two liquid outlet surfaces (5) are formed at the thin portion (32) and are roughly parallel to the wide plane (23) of the end portion of the blade head (2), and a transverse liquid guide channel (20) is provided at the liquid injection portion (3) and is horizontally penetrated along an axis roughly perpendicular to the knife rod (1), wherein the transverse liquid guide channel (20) is connected to the hollow liquid injection channel (10), and the transverse liquid guide channel (20) forms an opening on the side of the liquid injection portion (3).

2. The ultrasonic bone knife head according to claim 1, characterized in that: The thickness of the liquid injection portion (3) and the end portion (2) of the cutter head are different, and the liquid injection portion (3) and the end portion (2) of the cutter head are transitionally connected via a wedge-shaped transition portion (4).

3. The ultrasonic bone cutting head according to claim 2, characterized in that: The angle between the inclined plane of the wedge-shaped transition portion (4) and the axial direction of the cutter head end (2) is less than 10 degrees.

4. The ultrasonic bone cutting head according to claim 3, characterized in that: A cutting portion (22) is formed at the front end of the blade end (2), and the cutting portion (22) is semicircular, quarter-circular, or hook-shaped.

5. The ultrasonic bone knife head according to claim 3, characterized in that: The cutter head end (2) is bent toward one side along a direction perpendicular to a wide plane (23) of the cutter head end (2).

6. The ultrasonic bone cutting head according to claim 5, characterized in that: The angle between the end of the cutter head (2) and the central axis of the cutter rod (1) is 0 to 30 degrees.

7. The ultrasonic bone cutting tool head according to claim 3, characterized in that: The cutter head end (2) is bent toward one side along a direction parallel to the wide plane (23) of the cutter head end (2).

8. The ultrasonic bone cutting head according to claim 7, characterized in that: The angle between the end of the cutter head (2) and the central axis of the cutter rod (1) is 0 to 45 degrees.

9. The ultrasonic osteotome head according to any one of claims 4 to 8, characterized in that: Cutting teeth (21) are formed on one side or both sides of the blade of the blade head end (2).

10. The ultrasonic bone cutting head according to claim 9, characterized in that: The cutting teeth (21) are pointed teeth or square teeth, and the tooth tips of the cutting teeth (21) all protrude forward along the axial direction of the knife rod (1).

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