Tool bit for taking out bone ring in oral implant bone grafting

Abstract

The invention belongs to the field of medical apparatus and instruments, and particularly relates to a tool bit for taking out a bone ring in oral implant bone grafting. The tool bit for taking out the bone ring in the oral implant bone grafting comprises a fan-shaped blade, the knife handle is divided into a first knife handle, a second knife handle and a knife handle neck, the first knife handle and the second knife handle are both of cylindrical structures with uniform thickness, one end of the first knife handle is connected with the blade, and the other end of the first knife handle is connected with the second knife handle through the bent knife handle neck; the knife body comprises a wrench position and a connecting part, one end of the wrench position is connected with the second knife handle, the other end of the wrench position is connected with the connecting part, and the connecting part is connected with the external threads on the ultrasonic osteotome handle through the internal threads. In practical application, the bone knife used for taking out the bone ring in oral cavity bone grafting extends from a hole in the middle of the bone ring to the bottom of the hole, the joint of the bone ring and the basal part is cut off in the front, back, left and right directions, the bone ring is separated from surrounding bone tissue, and therefore the bone ring is easily taken out.

Description

Technical Field

[0001] The invention belongs to the field of medical instruments, and in particular relates to a cutter head for removing bone rings in oral implant bone grafting. Background Art

[0002] Dental implants are an important means of repairing missing teeth. When implants are made, sufficient bone mass is required at the site. However, some patients have bone defects ( Figure 1 ), therefore, bone grafting is required before or during implantation. Among the bone grafting methods, there is a very practical and effective method: bone ring technology. The application process of bone ring technology is: implant the bone ring and the implant at the same time ( Figure 2 At present, most bone ring grafting surgeries use autologous bone rings. The preparation process of the bone rings is as follows: first, use a conventional hollow drill and implantation tools to prepare the bone rings in the bone donor area, and then remove the bone rings ( Figure 3 ).

[0003] The key difficulty of bone ring preparation technology is how to remove the bone ring. Currently, there is no special removal tool. The commonly used removal method is to pry it with a general instrument. First, it is difficult to pry it out. Second, the bone ring is easy to break during the prying process, and the operation will fail. Although the bone ring technology is very practical and effective, the difficulty in removal and the high risk limit its wide application. Therefore, there is a need for a method that can effectively remove the bone ring to make up for this defect in the bone ring preparation process. Summary of the invention

[0004] Based on the shortcomings of the bone ring removal method in the prior art: difficult to remove, uneven bottom of the bone ring, easy breakage of the bone ring, and lack of practical and convenient bone ring removal tools, the purpose of this application is to provide a knife head for removing bone rings in oral implant bone grafting.

[0005] The blade head for bone ring removal provided by the present application can be assembled on an ultrasonic bone knife and used together with an ultrasonic bone knife machine. The ultrasonic bone knife is a mature osteotomy tool, and there is no suitable blade head in conventional blade heads. Therefore, the present application designs a previously unavailable blade head suitable for removing bone rings.

[0006] Based on the above objectives, this application provides the following technical solutions:

[0007] One of the technical solutions of the present application provides a cutter head for removing bone rings in oral implant bone grafting, the cutter head comprising:

[0008] Blade: fan-shaped;

[0009] The knife handle is divided into a first knife handle, a second knife handle and a knife handle neck; the first knife handle and the second knife handle are both cylindrical structures with uniform thickness; one end of the first knife handle is connected to the blade, and the other end is connected to the second knife handle through a curved knife handle neck;

[0010] The blade body comprises a wrench position and a connecting portion; one end of the wrench position is connected to the second knife handle, and the other end is connected to the connecting portion; the connecting portion is used to connect to the ultrasonic bone knife handle;

[0011] The blade, handle and blade body are an integrally formed structure.

[0012] Furthermore, the above structure can also be expressed as: the blade, the first handle, the handle neck, the second handle, the wrench position, and the connecting part are connected in sequence.

[0013] Furthermore, the cutter head used for removing the bone ring in oral implant bone grafting is a left-opening cutter head or a right-opening cutter head, the opening directions of the cutting edges on the blades of the left-opening cutter head and the right-opening cutter head are opposite, and the left-opening cutter head and the right-opening cutter head are in a mirror-symmetrical relationship.

[0014] Furthermore, the tool head for removing bone rings in oral implant bone grafting includes a conventional-sized bone ring removal tool head and / or a fine-sized bone ring removal tool head; the conventional-sized bone ring removal tool head is used for cutting and removing conventional-sized bone rings, and the fine-sized bone ring removal tool head is used for cutting and removing small-sized bone rings; the blade radius of the conventional-sized bone ring removal tool head is 3.20 to 3.40 mm, and the blade radius of the fine-sized bone ring removal tool head is 2.6 to 2.75 mm; the radius of the blade is the sum of the fan radius and the radius of the cross-section of the handle; the thickness of the blade is 0.4 to 0.6 mm.

[0015] Furthermore, the blade is perpendicular to the central axis of the first handle; the curvature of the blade is 45 to 60 degrees;

[0016] Furthermore, rounded corners are provided at both ends of the circular arc of the blade to prevent the blade from getting stuck or being broken at sharp corners during bone cutting.

[0017] Furthermore, the bending angle of the handle neck is 110° to 130°, that is, the angle between the first handle and the second handle is 110° to 130°; the handle neck is smoothly connected to the first handle and the second handle; the length of the first handle is 20 to 30 mm, and the diameter is 1.0 to 1.2 mm; the length of the second handle is 20 to 30 mm, and the diameter is 1.0 to 1.2 mm.

[0018] Furthermore, the wrench bit is a regular quadrilateral or a regular hexagon, and the nominal diameter is 7 to 9 mm.

[0019] In some specific embodiments provided in the present application, the wrench position is a regular quadrilateral wrench position; the knife head for removing the bone ring matches the handle of the ultrasonic bone knife.

[0020] Furthermore, the connection portion is provided with an internal thread, and the internal thread is used to be connected to the external thread of the handle of the ultrasonic osteotome.

[0021] Furthermore, the material of the cutter head is any one of stainless steel, cobalt alloy, and titanium alloy; preferably high carbon steel, cobalt-nickel alloy, and nickel-titanium alloy.

[0022] The second technical solution of the present application provides an ultrasonic bone knife, comprising the above-mentioned knife head for removing bone rings in oral implant bone grafting, and an ultrasonic bone knife handle connected to the knife head.

[0023] When in use, the ultrasonic bone knife is connected to an ultrasonic device and is used to remove bone rings in oral implant bone grafting.

[0024] Furthermore, the ultrasonic bone cutter is connected to the ultrasonic device via a connecting line, and the ultrasonic device controls the ultrasonic bone cutter via the connecting line. The ultrasonic device is provided with an ultrasonic bone cutter handle bracket, which is used to clamp the ultrasonic bone cutter handle and place the ultrasonic bone cutter.

[0025] In some embodiments, the ultrasonic device is equipped with an infusion bottle / bag and an infusion bottle / bag holder. The infusion bottle / bag is used to hold physiological saline, is connected to the ultrasonic device through a hose, and is fixed to the rear of the ultrasonic device through the infusion bottle / bag holder. A pump is provided in the middle of the ultrasonic device to control the flow of physiological saline, which is used to rinse the wound surface / affected area with physiological saline when the connection between the bone ring and the surrounding bone tissue is cut off, thereby reducing the heat generated during grinding.

[0026] Furthermore, the inner hole diameter of the bone ring is 2.8-3.5 mm.

[0027] Furthermore, when used, a bone ring structure is first prepared with a hollow drill and an implant reamer, and then the cutter head is extended from the hole in the middle of the bone ring to the bottom of the hole, and the blade is manually controlled to rotate along the central axis of the first handle, and the cutter head is slightly vibrated in conjunction with an ultrasonic device to cut off the connection between the bone ring and the base in the forward, backward, left and right directions, so that the bone ring is disconnected from the surrounding bone tissue, thereby easily removing the bone ring. In actual applications, doctors / operators can select a cutter head with a blade opening in different directions according to the different patient positions or the up, down, left, and right positions of the affected area, thereby achieving cutting and removal of the bone ring.

[0028] The ultrasonic bone knife uses high-intensity focused ultrasound technology to convert electrical energy into mechanical energy through a transducer. Through high-frequency ultrasonic vibrations, the water in the contacted tissue cells is vaporized and the protein hydrogen bonds are broken, thereby completely destroying the bone tissue that needs to be cut during surgery. When in use, the temperature of the ultrasonic bone knife head is lower than 38°C and the surrounding propagation distance is less than 200 microns. Since this high-intensity focused ultrasound only has a destructive effect on bone tissue of a specific hardness, it will not only not damage blood vessels and nerve tissues, but also stop bleeding at the surgical wound, further reducing the incision of minimally invasive surgery, greatly improving the accuracy, reliability and safety of the surgery.

[0029] In some specific embodiments of the present application, the tools for preparing the bone ring are a ring drill and an implant cavity reaming drill.

[0030] Compared with the prior art, this application has at least the following beneficial technical effects:

[0031] (1) Compared with other bone grafting techniques, bone ring technology has the advantages of good osteogenesis, fewer surgeries, and shorter course of disease, which enables patients to receive more satisfactory treatment, reduce pain, and save costs and time.

[0032] (2) The set of blades for bone ring removal provided in this application makes the application of bone ring technology more perfect, making it a more ideal and widely used bone grafting method related to dental implant treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of bone defect;

[0034] Figure 2 Schematic diagram of simultaneous implantation of bone ring and implant;

[0035] Figure 3 Schematic diagram of the bone ring before and after removal;

[0036] Figure 4 A side view of a set of cutting tips for bone ring removal provided for the present application;

[0037] Figure 5 A front view of a set of cutting heads for bone ring removal provided in the present application;

[0038] Figure 6 It is a partial enlarged view of the cutter head structure;

[0039] Figure 7 It is the state when the blade head is connected to the ultrasonic bone knife handle;

[0040] Figure 8 It is a schematic diagram of the structure of the ultrasonic osteotome;

[0041] Fig. 9A ring drill used in bone grafting for oral implants;

[0042] Fig.10 An implant cavity expansion drill used in oral implant bone grafting;

[0043] Fig.11 is a cross-sectional schematic diagram of the bone ring structure;

[0044] The numbers in the figure indicate:

[0045] 1- Blade;

[0046] 2-handle, 21-first handle, 22-handle neck, 23-second handle;

[0047] 3-blade, 31-wrench position, 32-connecting part;

[0048] 4-blade head; 5-ultrasonic bone knife handle; 6-connecting line; 7-ultrasonic device; 8-ultrasonic bone knife handle bracket;

[0049] 91-hose, 92-infusion bottle / bag holder, 93-infusion bottle / bag. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with specific embodiments. It should be noted that the following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, several variations and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0052] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0053] It should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] Embodiment 1 provides a cutter head for removing bone rings in oral implant bone grafting, the structure of which is referenced to Figures 4 to 7 .

[0055] This set of blades includes 2 pairs of blades of different sizes. The two blades on the left are slightly larger and are regular-sized blades, which are used to cut and remove ordinary-sized bone rings. The two blades on the right are slightly smaller and are fine-sized blades, which are used to cut and remove fine-sized bone rings. Figure 4 , Figure 5 ).

[0056] Taking the leftmost cutter head as an example, the structure of each cutter head includes:

[0057] The blade 1 is fan-shaped, with a central angle of 45°, a radius of 3.25 mm, and rounded corners at both ends of the arc. The radius of the blade is 3.25 mm = the radius of the fan + the radius of the cross section of the handle; the blade 1 (its enlarged structure is as shown in FIG. Figure 6 The first knife handle 21 is connected to the first knife handle 21, which is a cylindrical shape with uniform thickness, a diameter of 1.1mm, and a length of 20mm, and is connected to the knife handle neck 22; the knife handle neck 22 is bent at an angle of 120°, and the lower end is connected to the second knife handle 23, which is a cylindrical shape with uniform thickness, a diameter of 1.1mm, and a length of 20mm; the second knife handle 23 is connected to a regular quadrilateral wrench position 31, the nominal diameter of the wrench position 31 is 8mm, and the lower end is connected to the connecting portion 32; the connecting portion 32 is cylindrical, and an internal thread is provided at the bottom. The above first knife handle 21, neck 22, and second knife handle 23 together constitute the knife handle 2; the wrench position 31 and the connecting portion 32 together constitute the blade 3. The above blade 1, knife handle 2, and blade 3 are an integral structure, and together constitute a knife head 4 for removing bone rings.

[0058] like Figure 7 As shown, the blade head 4 is connected to the external thread provided on the ultrasonic bone knife handle 5 through the internal thread of the connecting portion 32, and a connecting line 6 is provided at the tail of the handle to connect with the ultrasonic equipment.

[0059] Embodiment 2 provides a method for using the above-mentioned blade head for removing bone rings in oral implant bone grafting and ultrasonic bone knife

[0060] The ultrasonic bone knife is connected to the ultrasonic device 7 via a connecting line 6. An ultrasonic bone knife handle bracket 8 is provided on the ultrasonic device 7. When not in use, the ultrasonic bone knife is placed on the ultrasonic bone knife handle bracket 8. When in use, the ultrasonic bone knife is removed from the ultrasonic bone knife handle bracket 8.

[0061] The ultrasonic device 7 is also provided with an infusion bottle / bag 93 and an infusion bottle / bag bracket 92. The infusion bottle / bag 93 is used to hold physiological saline, is connected to the ultrasonic device 7 through a hose 91, and is fixed to the rear of the ultrasonic device 7 through the infusion bottle / bag bracket 92. A small horizontal flow pump is provided inside the ultrasonic device 7, and the two ends of the pump are respectively connected to the hose 91 and the ultrasonic cleaning head to control the physiological saline to flow from the infusion bottle / bag 93 into the ultrasonic cleaning head to rinse the affected area (refer to Figure 8 ).

[0062] In practical applications, first use a hollow drill and an implant reamer (such as Fig. 9 , Fig.10 The ring drill and implant hole reamer shown in the figure are used to grind the bone into Fig.11 The shape is shown, and then the blade head 4 of the bone knife for removing the bone ring in oral implant bone grafting provided in Example 1 of the present application is extended from the hole in the middle of the bone ring to the bottom of the hole, and the connection between the bone ring and the base is cut in the front, back, left and right directions, so that the bone ring is disconnected from the surrounding bone tissue, thereby easily removing the bone ring.

[0063] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A cutter head for removing bone rings in oral implant bone grafting, characterized in that: The cutter head comprises: Blade (1): fan-shaped; The knife handle (2) is divided into a first knife handle (21), a second knife handle (23) and a knife handle neck (22); the first knife handle (21) and the second knife handle (23) are both cylindrical structures with uniform thickness; one end of the first knife handle (21) is connected to the blade (1), and the other end is connected to the second knife handle (23) through the curved knife handle neck (22); The blade body (3) comprises a wrench position (31) and a connecting portion (32); one end of the wrench position (31) is connected to the second blade handle (23), and the other end is connected to the connecting portion (32); the connecting portion (32) is used to connect to the ultrasonic bone knife handle (5); The blade (1), the handle (2) and the blade body (3) are an integrally formed structure.

2. A cutter head for removing bone rings in oral implant bone grafting according to claim 1, characterized in that: The cutter head used for removing the bone ring in oral implant bone grafting is a left-opening cutter head or a right-opening cutter head. The opening directions of the cutting edges on the blades of the left-opening cutter head and the right-opening cutter head are opposite, and the left-opening cutter head and the right-opening cutter head are in a mirror-symmetrical relationship.

3. A cutter head for removing bone rings in oral implant bone grafting according to claim 2, characterized in that: The cutter head for removing bone rings in oral implant bone grafting comprises a conventional-sized bone ring removal cutter head and / or a fine-sized bone ring removal cutter head; the conventional-sized bone ring removal cutter head is used for cutting and removing conventional-sized bone rings, and the fine-sized bone ring removal cutter head is used for cutting and removing fine-sized bone rings; the blade radius of the conventional-sized bone ring removal cutter head is 3.20-3.40 mm, and the blade (1) radius of the fine-sized bone ring removal cutter head is 2.6-2.75 mm; the radius of the blade is the sum of the fan-shaped radius and the radius of the cross-section of the handle; the thickness of the blade (1) is 0.4-0.6 mm.

4. The cutter head for removing bone rings in oral implant bone grafting according to claim 2, characterized in that: The blade (1) is perpendicular to the central axis of the first handle (21); the curvature of the blade (1) is 45° to 60°.

5. The cutter head for removing bone rings in oral implant bone grafting according to claim 2, characterized in that: Rounded corners are arranged at both ends of the blade arc.

6. The cutter head for removing bone rings in oral implant bone grafting according to claim 1, characterized in that: The bending angle of the knife handle neck (22) is 110° to 130°, and the knife handle neck (22) is smoothly connected to the first knife handle (21) and the second knife handle (23); the length of the first knife handle (21) is 20 to 30 mm, and the diameter is 1.0 to 1.2 mm; the length of the second knife handle (23) is 20 to 30 mm, and the diameter is 1.0 to 1.2 mm.

7. The cutter head for removing bone rings in oral implant bone grafting according to claim 1, characterized in that: The spanner position (31) is a regular quadrilateral or a regular hexagon, and has a nominal diameter of 7 to 9 mm.

8. The cutter head for removing bone rings in oral implant bone grafting according to claim 1, characterized in that: The connecting portion (32) is provided with an internal thread, and the internal thread is used to be connected to the external thread of the ultrasonic osteotome handle (5).

9. The cutter head for removing bone rings in oral implant bone grafting according to claim 1, characterized in that: The material of the cutter head (4) is any one of stainless steel, cobalt alloy and titanium alloy.

10. An ultrasonic osteotome, characterized in that: It comprises the cutter head (4) for removing bone rings in oral implant bone grafting as described in claim 1, and an ultrasonic bone cutter handle (5) connected to the cutter head (4).

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