CN114452019A - Root canal file system - Google Patents
Root canal file system Download PDFInfo
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- CN114452019A CN114452019A CN202210119754.3A CN202210119754A CN114452019A CN 114452019 A CN114452019 A CN 114452019A CN 202210119754 A CN202210119754 A CN 202210119754A CN 114452019 A CN114452019 A CN 114452019A
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- 210000004262 dental pulp cavity Anatomy 0.000 title claims abstract description 150
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims description 3
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract description 8
- 238000005553 drilling Methods 0.000 description 7
- 230000006978 adaptation Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000003902 lesion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002560 therapeutic procedure Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 208000024216 Periapical disease Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/40—Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots
- A61C5/42—Files for root canals; Handgrips or guiding means therefor
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Neurosurgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention provides a root canal file system, which comprises a first root canal file, a second root canal file and a third root canal file, wherein the first root canal file, the second root canal file and the third root canal file respectively comprise a handle part and a blade part which is integrally connected with one end of the handle part; the blade part comprises a tail blade connected to one end of the handle part, a middle blade connected to the end of the tail blade far away from the handle part and a tip blade connected to one end of the middle blade far away from the tail blade; the blade part of each root canal file comprises at least three spiral blades, the cross section of the blade part of the first root canal file is triangular, the cross section of the blade part of the second root canal file is square, and the cross section of the third root canal file is convex triangular; the outside diameter ratio of the cutting edge part of the third canal file, the second canal file and the first canal file to the position of the preset length at the end part is 1.2-3.0: 1.05-1.8: 1.0. only adopt three root canal files to realize root canal preparation, can reduce the operation degree of difficulty of root canal preparation, raise the efficiency.
Description
Technical Field
The invention belongs to the technical field of dental medical instruments, and particularly relates to a root canal file system.
Background
Root canal therapy (root canal therapy) is the most commonly used effective treatment method for endodontic and periapical diseases in the dental medical industry, mainly by removing most of the infectious material in the root canal by mechanical and chemical methods, and by filling the root canal and closing the crown, preventing the occurrence of periapical lesions and promoting the healing of the already-occurring periapical lesions.
In the mechanical method of the root canal treatment process, a root canal file is required, and in the related art, a root canal preparation is generally performed by using six root canal files, but the scheme using six root canal files is complex to operate and low in efficiency in the root canal preparation process.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a root canal file system, which only adopts three root canal files to realize root canal preparation, can reduce the operation difficulty of the root canal preparation and improve the efficiency.
In order to solve the technical problems, the present invention provides a root canal file system, which comprises a first root canal file, a second root canal file and a third root canal file, wherein each of the first root canal file, the second root canal file and the third root canal file comprises a handle part and a blade part integrally connected to one end of the handle part; the blade part comprises a tail blade connected to one end of the handle part, a middle blade connected to the tail blade and far away from the end of the handle part, and a tip blade connected to one end of the middle blade and far away from the tail blade;
the blade part of each root canal file comprises at least three spiral blades, the cross section of the blade part of the first root canal file is triangular, the cross section of the blade part of the second root canal file is square, and the cross section of the third root canal file is convex triangular;
the outer diameter ratio of the cutting edge part of the third canal file, the second canal file and the first canal file to the position with the preset length at the end part is 1.2-3.0: 1.05-1.8: 1.0.
further, the ratio of the outer diameters of the tail edge, the middle edge and the tip edge of the first rasp is 3.5-5: 1.8-2.5: 1.
further, the external diameter ratio of the tail edge, the middle edge and the tip edge of the second rasp is 2.7-5.5: 1.9-3.8: 1.
further, the ratio of the outer diameters of the tail edge, the middle edge and the tip edge of the third rasp is 1.7-5.0: 1.4-3.1: 1.
further, the length of the blade part is 15-20 mm, the diameter of the handle part is 1-1.3 mm, and the outer diameter of the blade part gradually increases from the end part of the tip part towards the handle part.
Further, the first root canal file has an outer diameter of 0.15 to 0.17mm at an end of the tip edge remote from the shank portion, and the first root canal file has an outer diameter of 0.18 to 0.22mm at an end of the tip edge remote from the shank portion by 3 mm; the outer diameter of the middle blade of the first root canal file at a position 9mm away from one end of the tip blade away from the handle part is 0.35-0.40 mm; the first file has a trailing edge with an outer diameter of 0.65-0.80 mm at a distance of 15mm from an end of the tip edge remote from the shank.
Further, the second file has an outer diameter of 0.16 to 0.18mm at an end of the pointed edge remote from the handle, and the second file has an outer diameter of 0.30 to 0.35mm at a position 3mm from an end of the pointed edge remote from the handle; the middle blade of the second root canal file has an outer diameter of 0.55 to 0.70mm at a position 9mm from the end of the tip blade away from the shank portion; the trailing edge of the second file has an outer diameter of 0.85 to 0.95mm at a distance of 15mm from the end of the tip edge remote from the shank portion.
Further, the third file has an outer diameter of 0.20 to 0.40mm at an end of the tip edge remote from the shank portion, and the third file has an outer diameter of 0.25 to 0.60mm at an end of the tip edge remote from the shank portion by 3 mm; the middle blade of the third root canal file has an outer diameter of 0.60 to 0.85mm at a position 9mm from one end of the tip blade away from the shank portion; the outer diameter of the trailing edge of the third root canal file at a position 15mm from the end of the tip edge remote from the shank portion is 0.9 to 1.05 mm.
Further, each of the root canal files is made of nitinol.
Further, the length of the blade part of the first canal file is 19-20 mm; the blade parts of the second and third rasps have a length of 16-18 mm.
Compared with the prior art, the root canal file system has the advantages that:
the cutting edge part cross section of first root canal file and third root canal file is triangle-shaped and protruding triangle-shaped respectively, and consequently, the cutting edge part of first root canal file and third root canal file all has three cutting flutes, and the cutting edge part cross section of second root canal file is the square, and consequently, the cutting edge part of second root canal file has four cutting flutes, sets up to 1.2-3.0 through the external diameter ratio with the cutting edge part of third root canal file, second root canal file and first root canal file apart from its tip predetermined length position: 1.05-1.8: 1.0, first root canal file, second root canal file and third root canal file can be used for the drilling cutting to the root canal in proper order to the realization is enlarged progressively cutting of root canal, only adopts three root canal files to realize root canal preparation, can reduce the operation degree of difficulty that root canal prepared, raises the efficiency.
Drawings
FIG. 1 is a schematic view of a first root canal file of the system of root canal files in an embodiment of the present invention;
FIG. 2 is a schematic view of a second file of the file system of the present invention;
FIG. 3 is a schematic view of a third file of the endodontic system of an embodiment of the present invention.
In the drawings, each reference numeral denotes: 1. a first canal file; 2. a second pipe file; 3. a third canal file; 10. a handle; 20. a knife edge part; 201. a tail edge; 202. a middle blade; 203. a tip edge.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example (b):
in the present embodiment, referring to fig. 1-3, the root canal file system comprises a first root canal file 1, a second root canal file 2 and a third root canal file 3, each of the first root canal file 1, the second root canal file 2 and the third root canal file 3 comprising a shank portion 10 and a blade portion 20 integrally connected to one end of the shank portion 10; the blade portion 20 includes a trailing edge 201 connected to one end of the shank 10, a middle edge 202 connected to the trailing edge 201 at an end away from the shank 10, and a tip edge 203 connected to an end of the middle edge 202 away from the trailing edge 201; the blade part 20 of each root canal file comprises at least three spiral blades, the cross section of the blade part 20 of the first root canal file 1 is triangular, the cross section of the blade part 20 of the second root canal file 2 is square, and the cross section of the third root canal file 3 is convex triangular; the ratio of the outer diameter of the blade part 20 of the third root canal file 3, the second root canal file 2 and the first root canal file 1 from the position of the predetermined length at the end part thereof is 1.2-3.0: 1.05-1.8: 1.0.
the blade part 20 cross-section of first root canal file 1 and third root canal file 3 is triangle-shaped and convex triangle-shaped respectively, therefore, the blade part 20 of first root canal file 1 and third root canal file 3 all has three cutting flutes, and the blade part 20 cross-section of second root canal file 2 is the square, and consequently, the blade part 20 of second root canal file 2 has four cutting flutes, sets up to 1.2-3.0 through the external diameter ratio of the blade part 20 of third root canal file 3, second root canal file 2 and first root canal file 1 apart from its tip predetermined length position: 1.05-1.8: 1.0, first root canal file 1, second root canal file 2 and third root canal file 3 can be used for the drilling cutting to the root canal in proper order to the realization is enlarged progressively cutting to the root canal, only adopts three root canal files to realize root canal preparation, can reduce the operation degree of difficulty that root canal prepared, raises the efficiency.
In this embodiment, each of the canal files is made of nitinol. Therefore, the material has good deformability, good wear resistance and good toughness, is suitable for cutting and drilling teeth, and is not easy to break.
The ratio of the outer diameters (average of the corresponding site outer diameters) of the trailing edge 201, the middle edge 202, and the tip edge 203 of the first root canal file 1 is 3.5 to 5: 1.8-2.5: 1. preferably, the ratio of the outer diameters of the trailing edge 201, the middle edge 202 and the tip edge 203 of the first root canal file 1 is 3.6 to 4.5: 1.9-2.4: 1.
specifically, the outer diameter of the first root canal file 1 at the end of the tip edge 203 far from the handle 10 is 0.15-0.17 mm, and the outer diameter of the first root canal file 1 at the end of the tip edge 203 far from the handle 10 is 3mm is 0.18-0.22 mm; the middle blade 202 of the first root canal file 1 has an outer diameter of 0.35 to 0.40mm at a distance of 9mm from the end of the tip blade 203 remote from the shank 10; the trailing edge 201 of the first file 1 has an outer diameter of 65-80 mm at a distance of 15mm from the end of the tip edge 203 remote from the shank 10. Preferably, in the present embodiment, the first file 1 has an outer diameter of 0.16mm at the end of the point blade 203 remote from the handle 10, and the first file 1 has an outer diameter of 0.20mm at the end of the point blade 203 remote from the handle 10 by 3 mm; the middle blade 202 of the first file 1 has an outer diameter of 0.38mm at a distance of 9mm from the end of the tip blade 203 remote from the shank 10; the trailing edge 201 of the first file 1 has an outer diameter of 0.72mm at a distance of 15mm from the end of the tip edge 203 remote from the shank 10. Through the setting of aforementioned each parameter, can make first root canal file 1 have good deformability to, the transition nature of each part cutting part is better, cuts out the pore structure along the extending direction of root canal more easily. It should be understood that, in practical applications, the parameters of the various parts of the first canal file 1 can be adaptively configured within the aforementioned parameters, and are not limited herein.
The external diameter ratio of the tail edge 201, the middle edge 202 and the tip edge 203 of the second tubular file 2 is 2.7-5.5: 1.9-3.8: 1. preferably, the ratio of the outer diameters of the tail edge 201, the middle edge 202 and the tip edge 203 of the second rasp 2 is 2.8 to 5.5: 1.9-3.7: 1.
specifically, the outer diameter of the second rasp 2 at the end of the tip edge 203 away from the handle 10 is 0.16-0.18 mm, and the outer diameter of the second rasp 2 at the end of the tip edge 203 away from the handle 10 is 3mm is 0.30-0.35 mm; the middle edge 202 of the second canal file 2 has an outer diameter of 0.55-0.70 mm at a distance of 9mm from the end of the tip edge 203 away from the shank 10; the trailing edge 201 of the second canal file 2 has an outer diameter of 0.85-0.95 mm at a distance of 15mm from the end of the tip edge 203 remote from the shank 10. Preferably, in the present embodiment, the second rasp 2 has an outer diameter of 0.17mm at the end of the tip edge 203 away from the handle 10, and the second rasp 2 has an outer diameter of 0.32mm at the end of the tip edge 203 away from the handle 10; the middle edge 202 of the second canal file 2 has an outer diameter of 0.62mm at a distance of 9mm from the end of the tip edge 203 remote from the shank 10; the trailing edge 201 of the second canal file 2 has an outer diameter of 0.92mm at a distance of 15mm from the end of the tip edge 203 remote from the shank 10. Through the setting of aforementioned each parameter, can make second root canal file 2 have good deformability on the one hand, and, the transition nature of each part cutting part is better, cuts a pore structure along the extending direction of root canal more easily, and on the other hand, such parameter setting cuts processing along the route in the hole that first root canal file 1 cut out more easily, thereby enlarges the aperture, and, owing to with the adaptation of boring of first root canal file 1, can make second root canal file 2 be more difficult to damage, and cutting efficiency is higher. It should be understood that, in practical applications, the parameters of the various parts of the second canal file 2 can be adaptively configured within the aforementioned parameters, and are not limited thereto.
The ratio of the outer diameters of the tail blade 201, the middle blade 202 and the tip blade 203 of the three-root canal file is 1.7-5.0: 1.4-3.1: 1. preferably, the ratio of the outer diameters of the tail edge 201, the middle edge 202 and the tip edge 203 of the three files is 2.5-4.2: 1.9-3.1: 1.
specifically, the third file 3 has an outer diameter of 0.20 to 0.40mm at the end of the tip edge 203 away from the handle 10, and the third file 3 has an outer diameter of 0.25 to 0.60mm at the end of the tip edge 203 away from the handle 10; the middle blade 202 of the third file 3 has an outer diameter of 0.60 to 0.85mm at a distance of 9mm from the end of the tip blade 203 remote from the shank 10; the trailing edge 201 of the third file 3 has an outer diameter of 0.9 to 1.05mm at a distance of 15mm from the end of the tip edge 203 remote from the shank 10. Preferably, in the present embodiment, the outer diameter of the third file 3 at the end of the point blade 203 remote from the handle 10 is 0.25mm, and the outer diameter of the third file 3 at the end of the point blade 203 remote from the handle 10 is 0.43 mm; the middle blade 202 of the third file 3 has an outer diameter of 0.69mm at a distance of 9mm from the end of the tip blade 203 remote from the shank 10; the trailing edge 201 of the third file 3 has an outer diameter of 1.05mm at a distance of 15mm from the end of the tip edge 203 remote from the shank 10. Through the setting of aforementioned each parameter, can make third root canal file 3 have good deformability on the one hand, and, the transition nature of each part cutting part is better, cut a pore structure along the extending direction of root canal more easily, and on the other hand, such parameter setting cuts processing along the route in the hole that second root canal file 2 cut out more easily, thereby enlarges the aperture, and, owing to with the adaptation of boring of second root canal file 2, can make third root canal file 3 be more difficult to damage, cutting efficiency is higher. It should be understood that, in practical applications, the parameters of the parts of the third canal file 3 can be adaptively configured within the aforementioned parameters, and are not limited herein.
The parameter of the second root canal file 2 is relevant with the parameter of the first root canal file 1, with the processing in the hole that the first root canal file 1 of adaptation processed, the parameter of the third root canal file 3 is relevant with the parameter of the second root canal file 2, with the processing in the hole that the second root canal file 2 of adaptation processed, through the setting of above-mentioned each parameter, can make the drilling processing action adaptation of adjacent times more, progressive nature is better, the effect of drilling is better, drilling efficiency is better, more not fragile after carry out the root canal file of drilling processing, and, can reduce the operation number of times of changing the root canal file, reduce the operation complexity.
The length of the blade part 20 is 15-20 mm, the diameter of the shank part 10 is 1-1.3 mm, and the outer diameter of the blade part 20 is gradually increased from the end of the tip part 203 toward the shank part 10. Preferably, the length of the blade part 20 of the first root canal file 1 is 19-20 mm; the blade part 20 of the second and third rasp 2, 3 has a length of 16-18 mm. Specifically, in the present embodiment, the length of the blade portion 20 of the first root canal file 1 is 19.5mm, the length of the blade portion 20 of the second root canal file 2 and the third root canal file 3 is 17mm, the diameter of the shank portion 10 of the first root canal file 1 and the second root canal file 2 is 1mm, and the diameter of the shank portion 10 of the third root canal file 3 is 1.2 mm.
The following table shows examples of setting parameters of the first file 1, the second file 2 and the third file 3, it should be understood that the parameters in the following table are only examples and are not intended to limit the scope of the present invention.
Table one: root canal file parameter table
Wherein D0 is the outer diameter of the file at the end of the point blade remote from the handle; d3 is the outer diameter of the file at a distance of 3mm from the end of the point blade away from the handle; d9 is the external diameter of the middle blade of the root canal file at the position 9mm away from one end of the tip blade far away from the handle part; d15 is the outer diameter of the tail edge of the file at 15mm from the end of the tip edge remote from the shank. Note: the outer diameter is in mm (millimeters).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A root canal file system is characterized by comprising a first root canal file, a second root canal file and a third root canal file, wherein the first root canal file, the second root canal file and the third root canal file respectively comprise a handle part and a blade part which is integrally connected with one end of the handle part; the blade part comprises a tail blade connected to one end of the handle part, a middle blade connected to the tail blade and far away from the end of the handle part, and a tip blade connected to one end of the middle blade and far away from the tail blade;
the blade part of each root canal file comprises at least three spiral blades, the cross section of the blade part of the first root canal file is triangular, the cross section of the blade part of the second root canal file is square, and the cross section of the third root canal file is convex triangular;
the outer diameter ratio of the cutting edge part of the third canal file, the second canal file and the first canal file to the position with the preset length at the end part is 1.2-3.0: 1.05-1.8: 1.0.
2. the system of claim 1, wherein the first file has a ratio of outer diameters of the trailing edge, the middle edge and the tip edge of 3.5 to 5: 1.8-2.5: 1.
3. the system of claim 1, wherein the second file has a ratio of outer diameters of the trailing edge, the middle edge and the apical edge of 2.7-5.5: 1.9-3.8: 1.
4. the system of claim 1, wherein the ratio of the outer diameters of the trailing edge, the middle edge and the tip edge of the third file is 1.7-5.0: 1.4-3.1: 1.
5. the endodontic file system according to any one of claims 1 to 4, wherein the length of said blade portion is 15 to 20mm, the diameter of said shank portion is 1 to 1.3mm, and the outer diameter of said blade portion is gradually increased from the end of said tip edge toward the direction of said shank portion.
6. The system of claim 5, wherein the first file has an outer diameter of 0.15-0.17 mm at an end of the point blade remote from the handle portion, and an outer diameter of 0.18-0.22 mm at a distance of 3mm from an end of the point blade remote from the handle portion; the outer diameter of the middle blade of the first root canal file at a position 9mm away from one end of the tip blade away from the handle part is 0.35-0.40 mm; the first root canal file has a trailing edge with an outer diameter of 0.65 to 0.80mm at a distance of 15mm from an end of the tip edge remote from the shank portion.
7. The system according to claim 5, wherein said second file has an outer diameter of 0.16-0.18 mm at an end of said point blade remote from said handle portion, and an outer diameter of 0.30-0.35 mm at a position 3mm from an end of said point blade remote from said handle portion; the middle blade of the second root canal file has an outer diameter of 0.55 to 0.70mm at a position 9mm from the end of the tip blade away from the shank portion; the trailing edge of the second file has an outer diameter of 0.85 to 0.95mm at a distance of 15mm from the end of the tip edge remote from the shank portion.
8. The system according to claim 5, wherein said third file has an outer diameter of 0.20-0.40 mm at an end of said point edge remote from said handle portion, and an outer diameter of 0.25-0.60 mm at an end of said point edge remote from said handle portion by 3 mm; the middle blade of the third root canal file has an outer diameter of 0.60 to 0.85mm at a position 9mm from one end of the tip blade away from the shank portion; the outer diameter of the trailing edge of the third root canal file at a position 15mm from the end of the tip edge remote from the shank portion is 0.9 to 1.05 mm.
9. The system of claim 5, wherein each of said files is made of nitinol.
10. The endodontic file system of claim 5 wherein the blade portion of said first canal file has a length of 19-20 mm; the blade parts of the second and third canal files have the length of 16-18 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210119754.3A CN114452019B (en) | 2022-02-08 | 2022-02-08 | Root canal file system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210119754.3A CN114452019B (en) | 2022-02-08 | 2022-02-08 | Root canal file system |
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| CN114452019A true CN114452019A (en) | 2022-05-10 |
| CN114452019B CN114452019B (en) | 2024-06-14 |
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| CN202210119754.3A Active CN114452019B (en) | 2022-02-08 | 2022-02-08 | Root canal file system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203943750U (en) * | 2014-01-01 | 2014-11-19 | 龙小平 | Reciprocating left revolving blade root canal file |
| CN204446150U (en) * | 2014-12-19 | 2015-07-08 | 上海埃蒙迪材料科技股份有限公司 | Convex nickel-titanium instruments |
| CN206995351U (en) * | 2017-02-23 | 2018-02-13 | 四川省海纳联创医疗器械有限公司 | A kind of high efficiency root canal file for treating root pipe |
| AU2021102253A4 (en) * | 2021-04-29 | 2021-06-17 | Changzhou United Dental Medical Instrument Co., Ltd. | Root canal file with discontinuous spiral cutting blade |
| CN213552491U (en) * | 2020-10-26 | 2021-06-29 | 深圳市雅维医疗器械有限公司 | Many pyramids root canal file |
-
2022
- 2022-02-08 CN CN202210119754.3A patent/CN114452019B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203943750U (en) * | 2014-01-01 | 2014-11-19 | 龙小平 | Reciprocating left revolving blade root canal file |
| CN204446150U (en) * | 2014-12-19 | 2015-07-08 | 上海埃蒙迪材料科技股份有限公司 | Convex nickel-titanium instruments |
| CN206995351U (en) * | 2017-02-23 | 2018-02-13 | 四川省海纳联创医疗器械有限公司 | A kind of high efficiency root canal file for treating root pipe |
| CN213552491U (en) * | 2020-10-26 | 2021-06-29 | 深圳市雅维医疗器械有限公司 | Many pyramids root canal file |
| AU2021102253A4 (en) * | 2021-04-29 | 2021-06-17 | Changzhou United Dental Medical Instrument Co., Ltd. | Root canal file with discontinuous spiral cutting blade |
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| Publication number | Publication date |
|---|---|
| CN114452019B (en) | 2024-06-14 |
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