阅读说明：本技术 一种高疲劳寿命NiTi合金根管锉及其工艺 (NiTi alloy root canal file with long fatigue life and process thereof ) 是由 宋鸿武 石常磊 李嘉伟 郭繁荣 李洪亮 于 2020-07-17 设计创作，主要内容包括：本发明公开了一种高疲劳寿命NiTi合金根管锉及其工艺,包括手柄,所述手柄的一端固定连接有螺纹头,所述螺纹头的另一端固定连接有工作杆,所述手柄的另一端固定连接有球形安装头,所述手柄的两侧表面均设有长条凹槽,所述长条凹槽的底面设有中间通孔,所述螺纹头的表面螺纹按照有定位环,所述定位环的表面设有防滑凸起,所述防滑凸起的两侧面均设有导向圆弧,所述工作杆采用NiTi合金制成,能够极大缩短加工时间并保证所述高疲劳寿命NiTi合金根管锉的质量,并且抛光工艺采取电解抛光,显著提高所述高疲劳寿命NiTi合金根管锉的表面光洁度,采用高真空和气氛复合热处理工艺,使得所述高疲劳寿命NiTi合金根管锉具有良好的韧性,利于推广使用。(The invention discloses a high fatigue life NiTi alloy root canal file and a process thereof, the file comprises a handle, one end of the handle is fixedly connected with a screw head, the other end of the screw head is fixedly connected with a working rod, the other end of the handle is fixedly connected with a spherical mounting head, the surfaces of two sides of the handle are respectively provided with a strip groove, the bottom surface of the strip groove is provided with a middle through hole, the surface of the screw head is provided with a positioning ring according to a screw thread, the surface of the positioning ring is provided with an anti-skid bulge, two side surfaces of the anti-skid bulge are respectively provided with a guide arc, the working rod is made of NiTi alloy, the processing time can be greatly shortened, the quality of the high fatigue life NiTi alloy root canal file can be ensured, the polishing process adopts electrolytic polishing, the surface smoothness of the high fatigue life NiTi alloy root canal file is, the NiTi alloy root canal file with the long fatigue life has good toughness, and is beneficial to popularization and use.)

1. A high fatigue life NiTi alloy root canal file and process thereof, comprises a handle (1), and is characterized in that: the one end fixedly connected with screw thread head (11) of handle (1), other end fixedly connected with work rod (12) of screw thread head (11), the spherical installation head (13) of other end fixedly connected with of handle (1), the both sides surface of handle (1) all is equipped with rectangular recess (14), through-hole (15) in the middle of the bottom surface of rectangular recess (14) is equipped with, the surface screw thread of screw thread head (11) is according to having holding ring (16), the surface of holding ring (17) is equipped with anti-skidding arch (17), the both sides face of anti-skidding arch (17) all is equipped with direction circular arc (18), work rod (12) adopt the NiTi alloy to make.

2. The high fatigue life NiTi alloy root canal file and process thereof of claim 1, wherein: the working rod (12) is of a spiral structure, and the diameter of the working rod is gradually reduced from the root position to the end position.

3. The high fatigue life NiTi alloy root canal file and process thereof of claim 1, wherein: the NITi alloy comprises Ni 54-57%, Ti 34-36% and the balance of unavoidable impurities.

4. The high fatigue life NiTi alloy root canal file and process thereof of claim 3, wherein: the inevitable impurity content is C: less than or equal to 0.040, less than or equal to 0.040 of O, less than or equal to 0.005 of N, less than or equal to 0.005 of H, less than or equal to 0.050 of Co, less than or equal to 0.010 of Cr, less than or equal to 0.010 of Cu, less than or equal to 0.050 of Fe and less than or equal to 0.025 of Nb.

5. The high fatigue life NiTi alloy root canal file and process thereof of claim 1, wherein: the process comprises the following steps:

s1, processing the nickel-titanium alloy wire with a preset diameter by a numerical control machine tool to obtain a plurality of mechanically processed and formed nickel-titanium alloy flexible elastic root canal files;

s2, carrying out mechanical grinding treatment on the root canal file;

s3, polishing the surface of the ground root canal file;

and S4, performing heat treatment on the polished nickel-titanium alloy flexible elastic root canal file.

6. The NiTi alloy root canal file with high fatigue life and the process thereof as claimed in claim 5, wherein: and the grinding treatment process in the step S2 adopts the transmission of a machine tool lead screw.

7. The NiTi alloy root canal file with high fatigue life and the process thereof as claimed in claim 5, wherein: the polishing process of step S3 employs an electropolishing process.

8. The NiTi alloy root canal file with high fatigue life and the process thereof as claimed in claim 5, wherein: the heat treatment of the step S4 adopts a high vacuum and atmosphere composite heat treatment process.

Technical Field

The invention relates to the field of medical instruments, in particular to a NiTi alloy root canal file with long fatigue life and a process thereof.

Background

Root canal therapy (root canal therapy) is the most commonly used internationally effective treatment for endodontic and periapical diseases. The principle of endodontics is to remove most of the infectious material in the root canal by mechanical and chemical means and to prevent the occurrence of periapical lesions or to promote the healing of already occurring periapical lesions by filling the root canal, closing the crown.

Thorough, comprehensive cleaning capacity can be carried out when having satisfied root canal therapy, and the root canal file should satisfy the requirement of three aspect at least: firstly, the root canal file has certain cutting capacity so as to efficiently remove lesion tissues and complete the shaping of the root canal; secondly, the front end of the root canal file has certain flexibility, so that the root canal file can be guided to smoothly reach the bottom of the root canal, the tip of the root canal can be cleaned and shaped, and steps or side penetration on the inner wall of the root canal can be prevented; thirdly, the root canal file should have high bending fatigue fracture life, prevent the fracture of root canal file when using, cause the medical accident.

The existing stainless steel root canal file has good cutting capacity, but because the stainless steel has high rigidity, the inner surface step of the root canal is easy to penetrate, and in addition, the existing process can not ensure the surface roughness and can not meet the use requirement when in processing and production, and the processing process cost of the working rod part is high, so that the working rod part is not beneficial to control and use and needs to be improved. .

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a high fatigue life NiTi alloy root canal file and a process thereof, wherein the high fatigue life NiTi alloy root canal file is automatically recovered to a special alloy with an original shape at a certain specific temperature and has good plasticity, so that the advantage of the selected nickel titanium alloy as a raw material is more obvious than that of stainless steel, and meanwhile, the grinding is carried out in a screw transmission mode, so that the high fatigue life NiTi alloy root canal file has good processing precision and efficiency, the processing time can be greatly shortened, the quality of the high fatigue life NiTi alloy root canal file is ensured, the polishing process adopts electrolytic polishing, the surface smoothness of the high fatigue life NiTi alloy root canal file is obviously improved, and the high vacuum and atmosphere composite heat treatment process is adopted, so that the high fatigue life NiTi alloy root canal file has good toughness and is beneficial to popularization and use.

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides a high fatigue life NiTi alloy root canal file and technology, includes the handle, the one end fixedly connected with screw thread head of handle, the other end fixedly connected with working beam of screw thread head, the spherical installation head of other end fixedly connected with of handle, the both sides surface of handle all is equipped with rectangular recess, the bottom surface of rectangular recess is equipped with middle through-hole, the surface screw thread of screw thread head is according to having the holding ring, the surface of holding ring is equipped with the non-skid stud, the both sides face of non-skid stud all is equipped with the direction circular arc, the working beam adopts the NiTi alloy to make.

Preferably, the working rod has a spiral structure, and the diameter of the working rod is gradually reduced from the root position to the end position.

Preferably, the NITi alloy includes Ni 54-57%, Ti 34-36%, and the balance unavoidable impurities.

Preferably, the unavoidable impurity content is C: less than or equal to 0.040, less than or equal to 0.040 of O, less than or equal to 0.005 of N, less than or equal to 0.005 of H, less than or equal to 0.050 of Co, less than or equal to 0.010 of Cr, less than or equal to 0.010 of Cu, less than or equal to 0.050 of Fe and less than or equal to 0.025 of Nb.

Preferably, the process comprises the following steps:

s1, processing the nickel-titanium alloy wire with a preset diameter by a numerical control machine tool to obtain a plurality of mechanically processed and formed nickel-titanium alloy flexible elastic root canal files;

s2, carrying out mechanical grinding treatment on the root canal file;

s3, polishing the surface of the ground root canal file;

and S4, performing heat treatment on the polished nickel-titanium alloy flexible elastic root canal file.

6. The NiTi alloy root canal file with high fatigue life and the process thereof as claimed in claim 5, wherein: and the grinding treatment process in the step S2 adopts the transmission of a machine tool lead screw.

Preferably, the polishing process of step S3 is an electrolytic polishing process.

Preferably, the heat treatment of the step S4 adopts a high vacuum and atmosphere combined heat treatment process.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of a connecting via of the present invention;

FIG. 3 is a cross-sectional schematic view of the retaining ring of the present invention.

The reference numbers in the figures illustrate:

1, a handle, 11 thread heads, 12 working rods, 13 spherical mounting heads, 14 long-strip grooves, 15 middle through holes, 16 positioning rings, 17 anti-skid protrusions and 18 guide arcs.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

Referring to fig. 1-3, a high fatigue life NiTi alloy root canal file and process thereof, including a handle 1, one end of the handle 1 is fixedly connected with a screw head 11, the other end of the screw head 11 is fixedly connected with a working rod 12 to form a screw conical file structure for root canal treatment, the other end of the handle 1 is fixedly connected with a spherical mounting head 13 which can be mounted on an operation device for positioning, which is not described again, the two side surfaces of the handle 1 are both provided with strip grooves 14, the bottom surface of the strip groove 14 is provided with a middle through hole 15 which can form groove parts on both sides, thus playing a role of limiting connection, avoiding slipping and falling off, ensuring the stability of installation and positioning of the device, facilitating operation and use, the surface thread of the screw head 11 can be mounted and fixed by screw thread according to a positioning ring 16, being convenient and stable, facilitating positioning and installation and use, avoid the dislocation to interfere, the surface of holding ring 17 is equipped with anti-skidding arch 17, anti-skidding arch 17's both sides face all is equipped with direction circular arc 18, can level and smooth connection anti-skidding arch 17, so both can play anti-skidding effect through anti-skidding arch 17, can avoid again to connect the position too sharply and the fish tail finger, do benefit to connect the use, safety and stability, the working rod 12 adopts the NiTi alloy to make.

Preferably, the working rod 12 has a spiral structure, and the diameter of the working rod gradually decreases from the root position to the end position, so that a conical file structure can be formed, and the operation and the use are convenient.

Preferably, the NITi alloy includes Ni 54% -57%, Ti 34% -36%, and the balance unavoidable impurities.

Preferably, the unavoidable impurity content is C: less than or equal to 0.040, less than or equal to 0.040 of O, less than or equal to 0.005 of N, less than or equal to 0.005 of H, less than or equal to 0.050 of Co, less than or equal to 0.010 of Cr, less than or equal to 0.010 of Cu, less than or equal to 0.050 of Fe and less than or equal to 0.025 of Nb.

Preferably, the process comprises the following steps:

s1, processing the nickel-titanium alloy wire with a preset diameter by a numerical control machine tool to obtain a plurality of mechanically processed and formed nickel-titanium alloy flexible elastic root canal files;

s2, carrying out mechanical grinding treatment on the root canal file;

s3, polishing the surface of the ground root canal file;

and S4, performing heat treatment on the polished nickel-titanium alloy flexible elastic root canal file.

6. The NiTi alloy root canal file with high fatigue life and the process thereof as claimed in claim 5, wherein: and the grinding treatment process in the step S2 adopts the transmission of a machine tool lead screw.

Preferably, the polishing process of step S3 is an electrolytic polishing process.

Preferably, the heat treatment of the step S4 adopts a high vacuum and atmosphere combined heat treatment process. The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.