CN115091126A - Processing technology of low internal stress root canal file - Google Patents
Processing technology of low internal stress root canal file Download PDFInfo
- Publication number
- CN115091126A CN115091126A CN202210697934.XA CN202210697934A CN115091126A CN 115091126 A CN115091126 A CN 115091126A CN 202210697934 A CN202210697934 A CN 202210697934A CN 115091126 A CN115091126 A CN 115091126A
- Authority
- CN
- China
- Prior art keywords
- root canal
- canal file
- file
- heat treatment
- internal stress
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000004262 dental pulp cavity Anatomy 0.000 title claims abstract description 81
- 238000005516 engineering process Methods 0.000 title claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000005491 wire drawing Methods 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 6
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims 2
- 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 1
- 239000000725 suspension Substances 0.000 abstract description 5
- 230000008030 elimination Effects 0.000 abstract description 3
- 238000003379 elimination reaction Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/007—Alloys based on nickel or cobalt with a light metal (alkali metal Li, Na, K, Rb, Cs; earth alkali metal Be, Mg, Ca, Sr, Ba, Al Ga, Ge, Ti) or B, Si, Zr, Hf, Sc, Y, lanthanides, actinides, as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
Abstract
The invention discloses a processing technology of a low internal stress root canal file, belonging to the technical field of root canal file manufacturing. A processing technology of a low internal stress root canal file comprises the following steps: s1: carrying out wire drawing treatment on the wire by using wire drawing equipment; s2: processing the wire material into a conical root canal file, wherein the two ends of the conical root canal file are respectively provided with a fabrication hole; s3: performing stress-relief heat treatment on the conical root canal file to enable the root canal file to be suspended on a heat treatment clamp in a posture that a thin end is arranged above and a thick end is arranged below; s4: and (4) carrying out thread processing on the outer wall of the root canal file. The root canal file can be in a suspension state during heat treatment, and a heavy object is suspended below the root canal file, so that the elimination of internal stress in the root canal file can be accelerated, the heat treatment efficiency is improved, and the stress accumulation of the root canal file in the processing and heat treatment processes is reduced.
Description
Technical Field
The invention relates to the technical field of manufacturing of root canal files, in particular to a processing technology of a low internal stress root canal file.
Background
The description of the background of the invention pertaining to the related art to which the present invention pertains is given for the sole purpose of illustrating and facilitating an understanding of the summary of the invention and is not to be construed as an admission that the applicant is explicitly aware or inferred as prior art to the filing date of the first filed application for the present invention.
The snap failure of an endodontic file can be broadly divided into two modes, torsional snap and rotational fatigue snap. Torsional fracture refers to the fracture of the instrument caused by the fact that the tip or any part of the file is stuck in the narrow part of the root canal, and the handle part of the file is still rotating and exceeds the maximum elastic deformation limit of the material of the file. The breakage is mostly caused by small instruments and tips of the instruments, and the small instruments are mostly used for preparing root tip bending parts and are easy to be clamped to cause breakage. The surface of the device that is subject to torsional fracture often has visible deformations such as untwisting, irregular or reverse tightening of the threads, etc. The fatigue fracture is caused by metal bending fatigue, and although the root canal file is not locked in the root canal, the root canal file is continuously stretched and compressed in the process of repeated rotation of the bending part to generate metal fatigue, so that the root canal file is fractured under the condition that the elasticity limit of the root canal file is far smaller than the elasticity limit of the instrument. This type of file breakage, which often occurs without any signs, is considered to be an important factor in the breakage of machine files. And root canal file is at the biggest influence factor of rupture inefficacy in-process and derive from its inside stress variation, and current root canal file only can experience brief heat treatment in the course of working, and this heat treatment process not only can't eliminate root canal file's internal stress completely, still can't play the optimizing action to the distribution and the gathering of internal stress, leads to root canal file's life limited.
Disclosure of Invention
The invention aims to provide a processing technology of a low internal stress root canal file, which aims to solve the problem that the service life of the root canal file is influenced by prior optimization of the internal stress of the root canal file.
The technical scheme for solving the technical problems is as follows:
a processing technology of a low internal stress root canal file comprises the following steps:
s1: carrying out wire drawing treatment on the wire by using wire drawing equipment;
s2: processing the wire material into a conical root canal file, wherein the two ends of the conical root canal file are respectively provided with a fabrication hole;
s3: performing stress-relief heat treatment on the conical root canal file to enable the root canal file to be suspended on a heat treatment clamp in a posture that a thin end is arranged above and a thick end is arranged below;
s4: and (4) carrying out thread processing on the outer wall of the root canal file.
Further, in step S2, the center line of the circular holes at both ends of the file coincides with the axial centerline of the file.
Further, in step S3, a suspension wire is inserted into the hole at the root canal file tip, and the end of the suspension wire is connected to the heat treatment jig.
Further, in step S3, a hanging wire is inserted through the hole at the butt end of the file, and a weight is suspended from the hanging wire and suspended below the file.
Further, in step S3, the weight of the weight is 1.5 to 2 times the weight of the root canal file.
Further, in step S1, the wire is made of a nickel titanium alloy.
Further, in step S1, the content of titanium atoms in the nickel-titanium alloy is 20% to 40%, and the content of nickel atoms is: 20 to 30 percent.
Further, in step S3, the heat treatment temperature is 350 to 450 ℃, and the heat treatment time is: 1.5H to 2H.
The invention has the following beneficial effects:
in the production and manufacturing of the root canal file, the wire drawing treatment is firstly carried out, so that the internal lattice performance of the root canal file is optimized; the process holes are respectively formed in the two ends of the root canal file, so that the root canal file can be in a suspension state during heat treatment, and a heavy object is suspended below the root canal file, so that the elimination of internal stress in the root canal file can be accelerated, the heat treatment efficiency is improved, and the stress accumulation of the root canal file in the processing and heat treatment processes is reduced; the direction of the tension of the root canal file by the weight is consistent with the axial extension direction of the root canal file, so that the internal stress of the root canal file can be eliminated, and extra deformation caused by the action of external force can be avoided; compare prior art can be by a wide margin optimization its inside stress distribution and the gathering condition through the root canal file after the aforesaid is handled, guarantee its self intensity under high strength user state to root canal file's life has been improved.
Drawings
FIG. 1 is a schematic view of a file according to the present invention;
FIG. 2 is a process flow diagram of the inventive process.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Referring to fig. 1 and 2, a process for processing a low internal stress root canal file comprises the following steps:
s1: carrying out wire drawing treatment on the wire by using wire drawing equipment; the surface wire drawing treatment is a surface treatment means for forming lines on the surface of a workpiece by grinding a product to achieve a decorative effect, so that the texture of a metal material can be reflected. In the wire drawing treatment process of the process, the ultrasonic wave generating device can generate ultrasonic waves in response to the latest ultrasonic wire drawing process, and the ultrasonic waves are contacted with the wire drawing oil in the lubricating pool to generate a cavitation effect to form ultrasonic oscillation, so that the crystal lattice of the wire is refined, the plasticity and toughness of the wire are improved, the strength and hardness of the wire are improved, and the breakage is reduced.
The wire material adopted by the application is made of nickel-titanium alloy, the content of titanium atoms in the nickel-titanium alloy is 20% -40%, and the content of nickel atoms is as follows: 20 to 30 percent.
S2: processing the wire material into a conical root canal file, wherein the two ends of the conical root canal file are respectively provided with a fabrication hole; the tapered root canal file after processing is close to the finished final shaping shape of the existing root canal file to the fabrication hole center line at both ends of the root canal file coincides with the axial center line of the tapered root canal file, and the root canal file is suspended and placed when the subsequent heat treatment is convenient by arranging the fabrication hole.
S3: performing stress-relief heat treatment on the conical root canal file to enable the root canal file to be suspended on a heat treatment clamp in a posture that a thin end is arranged above and a thick end is arranged below; during suspension, a lifting rope penetrates through the technical hole at the thin end of the root canal file, and the end part of the lifting rope is connected with the heat treatment fixture. A lifting rope is inserted into the technical hole at the thick end of the root canal file, a heavy object is suspended on the lifting rope, and the heavy object is suspended below the root canal file. And the weight of the heavy object is 1.5-2 times of the self weight of the root canal file. Make the root canal file that suspends in midair the in-process receive the pulling force direction of heavy object unanimous with the axial extension direction of self, can eliminate self internal stress on the one hand, on the other hand can not produce extra deflection because of the exogenic action. In addition, suspend the heavy object in midair below the root canal file, can accelerate the inside elimination that possesses the internal stress of root canal file, improve heat treatment efficiency, reduce the stress concentration of root canal file in processing and heat treatment process
The temperature during the heat treatment is 350-450 ℃, and the time of the heat treatment is as follows: 1.5H to 2H.
S4: processing the outer wall of the root canal file by threads; after the stress-relieving heat treatment is carried out on the root canal file, the outer wall of the thin end of the root canal file is processed through related components, so that the outer wall of the root canal file is spiral.
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, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A processing technology of a root canal file with low internal stress is characterized by comprising the following steps:
s1: carrying out wire drawing treatment on the wire by using wire drawing equipment;
s2: processing the wire material into a conical root canal file, wherein the two ends of the conical root canal file are respectively provided with a fabrication hole;
s3: performing stress-relief heat treatment on the conical root canal file to enable the root canal file to be suspended on a heat treatment clamp in a posture that a thin end is arranged above and a thick end is arranged below;
s4: and (4) carrying out thread machining on the outer wall of the root canal file.
2. The process according to claim 1, wherein in step S2, the connection line of the centers of the fabrication holes at the two ends of the file coincides with the axial centerline of the file.
3. The process of claim 4, wherein in step S3, a lifting rope is inserted into the hole at the thin end of the file, and the end of the lifting rope is connected to the heat treatment fixture.
4. The process of claim 5, wherein in step S3, a rope is inserted into the hole at the butt end of the file, and a weight is suspended from the rope and suspended below the file.
5. The process for preparing a low internal stress root canal file according to claim 5, wherein in step S3, the weight of the weight is 1.5 to 2 times of the self weight of the root canal file.
6. The process of claim 1, wherein in step S1, the wire is made of nitinol.
7. The process for processing a low internal stress root canal file according to claim 2, wherein in step S1, the content of titanium atoms in the nickel-titanium alloy is 20% to 40%, and the content of nickel atoms is: 20 to 30 percent.
8. The process for machining a low internal stress root canal file according to any one of claims 1 to 7, wherein the heat treatment temperature is 350 ℃ to 450 ℃ and the heat treatment time is: 1.5H to 2H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697934.XA CN115091126B (en) | 2022-06-20 | 2022-06-20 | Processing technology of low internal stress root canal file |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697934.XA CN115091126B (en) | 2022-06-20 | 2022-06-20 | Processing technology of low internal stress root canal file |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115091126A true CN115091126A (en) | 2022-09-23 |
| CN115091126B CN115091126B (en) | 2024-03-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210697934.XA Active CN115091126B (en) | 2022-06-20 | 2022-06-20 | Processing technology of low internal stress root canal file |
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| Country | Link |
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| CN (1) | CN115091126B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9313964U1 (en) * | 1993-09-15 | 1993-12-02 | Beinlich Agrarpumpen Und Masch | Irrigation machine |
| CN104630730A (en) * | 2015-02-17 | 2015-05-20 | 哈尔滨工程大学 | Surface modification method of NiTi alloy martensitic root canal file |
| CN205433942U (en) * | 2015-12-17 | 2016-08-10 | 广州医科大学附属口腔医院 | Root canal file frame |
| CN108788644A (en) * | 2018-06-21 | 2018-11-13 | 深圳市葆丰医疗器械有限公司 | A kind of preparation method of the flexible root canal file of Nitinol |
| CN110155871A (en) * | 2019-04-25 | 2019-08-23 | 平高集团有限公司 | Wall bushing hoisting tooling |
| CN110497163A (en) * | 2019-09-26 | 2019-11-26 | 江苏盛玛特新材料科技有限公司 | A kind of lamination combined type root canal file and its processing technology |
| CN114150185A (en) * | 2021-12-17 | 2022-03-08 | 沈阳博尔雅生物科技有限公司 | Ultra-tough root canal file with Af being more than or equal to 45 ℃ and preparation method thereof |
-
2022
- 2022-06-20 CN CN202210697934.XA patent/CN115091126B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9313964U1 (en) * | 1993-09-15 | 1993-12-02 | Beinlich Agrarpumpen Und Masch | Irrigation machine |
| CN104630730A (en) * | 2015-02-17 | 2015-05-20 | 哈尔滨工程大学 | Surface modification method of NiTi alloy martensitic root canal file |
| CN205433942U (en) * | 2015-12-17 | 2016-08-10 | 广州医科大学附属口腔医院 | Root canal file frame |
| CN108788644A (en) * | 2018-06-21 | 2018-11-13 | 深圳市葆丰医疗器械有限公司 | A kind of preparation method of the flexible root canal file of Nitinol |
| CN110155871A (en) * | 2019-04-25 | 2019-08-23 | 平高集团有限公司 | Wall bushing hoisting tooling |
| CN110497163A (en) * | 2019-09-26 | 2019-11-26 | 江苏盛玛特新材料科技有限公司 | A kind of lamination combined type root canal file and its processing technology |
| CN114150185A (en) * | 2021-12-17 | 2022-03-08 | 沈阳博尔雅生物科技有限公司 | Ultra-tough root canal file with Af being more than or equal to 45 ℃ and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN115091126B (en) | 2024-03-01 |
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