Root canal file for tooth treatment

Abstract

The utility model belongs to the technical field of dental appliances, and particularly relates to a root canal file for dental treatment. By arranging the stop ring and the rod body II with the small diameter, when the root canal file is fractured in the operation process, the fractured part is concentrated in the area of the rod body II instead of being located below the stop ring, so that the fractured part cannot be completely embedded into teeth. Therefore, the rod body II can be taken out from the teeth by using a tool, and more serious problems cannot be caused. In addition, the stress dispersion part is located in the rod body II, and the stress concentration phenomenon generated when the root canal file rotates in the root canal is effectively prevented through at least one horizontal through hole. And the design of the stress dispersion part can enable the rotating force to be uniformly transmitted to the tail end of the root canal file, so that stress concentration is reduced, and the stability and safety of the root canal file are improved. In conclusion, stable operation of the root canal file in the tooth treatment process is effectively ensured, meanwhile, the risk of accidental injury is reduced, and the success rate and efficiency of treatment are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of dental appliances, and in particular relates to a root canal file for tooth treatment. Background Art

[0002] Root canal therapy is a common dental treatment that aims to remove and fill the root canal of a damaged tooth. During this procedure, the dentist will open the crown of the diseased tooth, clean the root canal, and use a set of fine and flexible root canal files to clean and shape the root canal. These root canal files can be operated manually or connected to an electric motor. During the cleaning and shaping process, the root canal file will rotate and move in order to penetrate deep into the root canal and remove diseased tissue along the way.

[0003] The existing root canal file is composed of a spiral blade, and its spiral direction is a right-handed thread. When the root canal file is rotated clockwise, the working blade enters the root canal and cuts the root canal wall to remove the lesion. Due to the right-handed thread direction of the working blade, there is both circumferential cutting and cutting in the rotational direction during the operation. Therefore, when the rotation rate is too fast or the size of the root canal file is greatly different from the actual root canal diameter, the blade may cut too deep, resulting in insufficient circumferential cutting force to cut off, thereby causing the occurrence of a jamming phenomenon.

[0004] If the root canal file is blocked in the root canal but continues to rotate, a twisting force will be applied, causing changes in the metal structure. When the rotating instrument continues to rotate after engaging the dentin, the metal material of the instrument will undergo irreversible structural changes. This irreversible change in the metal material will eventually lead to torsional fatigue, which will cause the instrument to break, and may eventually cause the metal at the end to break inside the tooth. In clinical treatment, if this happens, it is very difficult to handle, and treatment methods such as tooth extraction may be required, resulting in more serious consequences. Utility Model Content

[0005] In order to solve the defects of the prior art mentioned above, the utility model provides a root canal file for tooth treatment.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A root canal file for tooth treatment comprises a handle, a rod, and a file body composed of a spiral blade working area and a tip guide head. The handle is detachably connected to the head, the rod serves as a connecting piece, and a stop ring is fixedly arranged at the connection between the rod and the file body.

[0008] Optionally, the working area with the spiral blade is cone-shaped and the blade rotation direction is left-handed.

[0009] Optionally, the cross-sectional shape of the file body is circular, triangular or quadrilateral.

[0010] Optionally, the file body is made of nickel-titanium alloy wire or medical strong elastic stainless steel wire material.

[0011] Optionally, the cone-shaped file body has a taper of 0-15°.

[0012] Optionally, the cross-sectional shape of the stop ring may be circular or polygonal.

[0013] Optionally, the rod body above the stop ring includes a rod body I and a rod body II with different diameters, the diameter of the rod body I is larger than that of the rod body II, the lower end of the rod body II is fixedly connected to the stop ring, and the upper end is fixedly connected to the end of the rod body I, and the end of the rod body I away from the rod body II is fixedly connected to the handle.

[0014] Optionally, the diameter range of the rod body I is 0.6mm-1.0mm, and the diameter range of the rod body II is 0.3mm-0.6mm.

[0015] Optionally, a stress dispersion portion consisting of at least one horizontal through hole is also provided in the rod body II to effectively prevent stress concentration when the root canal file rotates in the root canal.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] In the present technical solution, by providing a stop ring and a small diameter rod body II, when the root canal file breaks during operation, the broken parts will be concentrated in the area of ​​the rod body II, rather than below the stop ring, so that the broken parts will not be completely embedded in the tooth. Therefore, the rod body II can be removed from the tooth using tools without causing more serious problems. In addition, the stress dispersion part is located in the rod body II, and through at least one horizontal through hole, the stress concentration phenomenon that occurs when the root canal file rotates in the root canal is effectively prevented. The design of the stress dispersion part can evenly transmit the rotational force to the end of the root canal file, reduce stress concentration, and improve the stability and safety of the root canal file. In summary, the setting of the stop ring and the design of the rod body II and the stress dispersion part effectively ensure the stable operation of the root canal file during tooth treatment, while reducing the risk of accidental injury and improving the success rate and efficiency of treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0019] Figure 1 A three-dimensional diagram of the root canal file for tooth treatment in the utility model;

[0020] Figure 2 for Figure 1 Schematic cross-section of a root canal file used in tooth treatment. DETAILED DESCRIPTION

[0021] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0022] This embodiment provides a root canal file for tooth treatment, referring to Figure 1 , 2 It includes a handle 1 and a rod 2, and a file body 3 composed of a working area 301 with a spiral blade and a tip guide head 302. The working area with a spiral blade is cone-shaped and its blade rotation direction is left-handed. The handle 1 is detachably connected to the head, the rod serves as a connecting part, and the file body 3 is a surgical operating part, which acts in the root canal of the tooth by screwing in.

[0023] In an optional manner, the cross-sectional shape of the file body 3 is circular, triangular or quadrilateral, etc., and the file body 3 is made of nickel-titanium alloy wire or medical strong elastic stainless steel wire. The cone-shaped file body 3 has a taper of 0-15°.

[0024] According to the different types of the handle 1, it can be divided into two types: hand-use and machine-use, which are specifically as follows:

[0025] Hand-held root canal file: The handle 1 and the file body 3 are directly injection molded to form an integrated structure. This design is simple, easy to use, and suitable for manual operation, such as hand-held rotation operation.

[0026] Machine root canal file: The handle 1 is made of a durable material such as copper or stainless steel. The handle 1 of the machine root canal file is mechanically connected to the file body 3, which can be a threaded connection, a clamping connection or other mechanical connection methods. This design is suitable for mechanical operation, such as in dental surgery, when used with electric instruments, with greater power and precision.

[0027] As an improved solution, a fixed stop ring 4 can be provided at the connection between the rod portion 2 of the root canal file and the file body 3. During the operation, when the file body 3 is screwed inwardly and embedded into the root canal of the tooth, the stop ring 4 can limit the screwing depth of the file body 3, thereby ensuring the accuracy and safety of the treatment. This design can effectively control the screwing depth of the root canal file and avoid potential risks caused by excessive screwing, such as damage to the root apex or surrounding tissues of the tooth. At the same time, the provision of the stop ring 4 can also improve the accuracy of the doctor's operation, making the treatment process more controllable and reliable. In general, by providing the stop ring 4 below the rod portion 2 of the root canal file, a safer and more reliable treatment tool can be provided for dentists, thereby improving the success rate and efficiency of root canal treatment.

[0028] In an optional solution, the cross-sectional shape of the stop ring 4 can be circular, quadrilateral or other polygonal. The purpose of such design is to meet the needs of different doctors and patients, as well as the characteristics of different tooth morphologies. Regardless of the shape, the main function of the stop ring 4 is to limit the screw-in depth of the root canal file to ensure the safety and accuracy of the operation.

[0029] As an improved solution, two parts with different diameters can be designed on the rod body above the stop ring 4, which are named rod body I 201 and rod body II 202. Among them, the diameter of rod body I 201 is larger than that of rod body II 202. Their connection relationship is as follows: the lower end of rod body II 202 is fixedly connected to the stop ring 4, and the upper end is fixedly connected to the end of rod body I 201. In addition, the other end of rod body I 201 is fixedly connected to the handle 1.

[0030] With such a design, when the root canal file breaks during operation, the broken parts will be concentrated in the area of ​​the rod body II 202, rather than below the stop ring 4. Combined with the structure of the stop ring 4, even if it breaks, the broken parts will not be completely embedded in the tooth. Therefore, the rod body II 202 can be removed from the tooth using tools without causing more serious problems. This improved solution can improve the safety of the root canal file, reduce the impact that may be caused by the breakage, and also facilitate the handling of the broken parts.

[0031] Optionally, the diameter range of the rod body I 201 is: 0.6mm-1.0mm, optionally, the diameter range of the rod body I 201 is 0.8mm; the diameter range of the rod body II 202 is 0.3mm-0.6mm, optionally, the diameter range of the rod body II 202 is 0.5mm.

[0032] As an improved solution, a stress dispersion portion 5 is provided in the rod body II 202, and the portion includes at least one horizontal through hole. Such a design can effectively prevent the stress concentration phenomenon that occurs when the root canal file rotates in the root canal.

[0033] Specifically, the stress dispersion part 5 is located below the head of the root canal file and is connected by at least one horizontal through hole. These horizontal through holes divide the cross section of the stress dispersion part 5 into several parts, so that when the root canal file rotates in the root canal of the tooth, the stress will not be concentrated at a specific location. In this way, the rotational force can be evenly transmitted to the end of the root canal file, effectively preventing the root canal file from breaking.

[0034] It is particularly noteworthy that the stress dispersion part 5 combines the large rotational torque transmitted by the head of the root canal file. When this torque force is first transmitted to the stress dispersion part 5, the stress concentration is minimized by dividing the cross section. In this way, the torque force can be evenly dispersed to the entire cross section, so that the root canal file can rotate stably and transmit the rotational force directly to the nerve treatment part of the tooth.

[0035] In addition, if the root canal file generates stress sufficient to cause breakage after entering the root canal, the stress dispersion portion 5 will be twisted and entangled first. In this way, the operator can sense the problem before the root canal file breaks and adjust the surgical method in time to avoid the subsequent breakage of the file body 3 and the sinking into the root canal.

[0036] When the utility model is in use:

[0037] When the machine is operated, through the unique motor setting, the utility model instrument first enters the tooth root canal in a cutting manner, and then rotates in the opposite direction to release to form a reciprocating motion. 3 to 6 reciprocating motions complete a 360° rotation cutting. In the case of reciprocating motion, the smaller the rotation angle, the safer the operation. Through left-hand rotation rotation cutting and right-hand rotation release, the rotation angle of left-hand cutting is 90 to 270°, and the rotation angle of right-hand release is 30 to 180°, so that the file body 3 can automatically move toward the root apex. Due to the unique reciprocating angle design, the instrument works in a relatively pressure-free state within its own elastic limit, and its cutting angle is larger than the reversal angle, so it can avoid deformation or breakage of the file body 3 while entering a good state of immediate cutting and good guidance of the file body 3 along the root canal.

[0038] When operated manually, since the spiral direction of the working cutting edge of the root canal file is left-handed, the instrument direction of the blade is opposite to the spiral direction of the blade, that is, no cutting along the rotational direction will occur in the rotational entry direction of the file body 3, but immediate cutting and immediate entry, which is a good operating working state of immediate entry and immediate cutting.

[0039] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A root canal file for tooth treatment, characterized in that: include: The utility model comprises a handle and a rod, and a file body composed of a spiral blade working area and a tip guide head. The handle is detachably connected to the machine head, and the rod serves as a connecting piece. A stop ring is fixedly arranged at the connection between the rod and the file body below.

2. A root canal file for tooth treatment according to claim 1, characterized in that: The working area of ​​the spiral blade is cone-shaped and the blade rotation direction is left-handed.

3. A root canal file for tooth treatment according to claim 1, characterized in that: The cross-sectional shape of the file body is circular, triangular or quadrilateral.

4. A root canal file for tooth treatment according to claim 1, characterized in that: The file body is made of nickel-titanium alloy wire or medical strong elastic stainless steel wire.

5. The root canal file for tooth treatment according to claim 1, characterized in that: The cone-shaped file body has a taper of 0-15°.

6. A root canal file for tooth treatment according to claim 1, characterized in that: The cross-sectional shape of the stop ring can be circular or polygonal.

7. A root canal file for tooth treatment according to claim 1, characterized in that: The rod body above the stop ring includes a rod body I and a rod body II with different diameters. The diameter of the rod body I is larger than that of the rod body II. The lower end of the rod body II is fixedly connected to the stop ring, and the upper end is fixedly connected to the end of the rod body I. The end of the rod body I away from the rod body II is fixedly connected to the handle.

8. A root canal file for tooth treatment according to claim 7, characterized in that: The diameter range of the rod body I is: 0.6mm-1.0mm, and the diameter range of the rod body II is 0.3mm-0.6mm.

9. The root canal file for tooth treatment according to claim 7, characterized in that: A stress dispersion portion consisting of at least one horizontal through hole is also provided in the rod body II, which effectively prevents stress concentration from occurring when the root canal file rotates in the root canal.

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