Three-dimensional self-adjusting root canal file and processing technology thereof
阅读说明：本技术 一种三维自调整根管锉及其加工工艺 (Three-dimensional self-adjusting root canal file and processing technology thereof ) 是由 黄兵民 刘晶 向义 于 2019-10-25 设计创作，主要内容包括：本发明的一种三维自调整根管锉及其加工工艺,先将两种或同种材质拉拔复合制成成复合胚体,作为根管锉的坯料,然后在复合胚体的不同部分分别加工出手柄、连接杆和锉体。该工艺的优势在于,以复合胚体的方法巧妙的将两种不同或相同的金属材料高强度以及完全无缝的进行结合,结合强度远胜胶粘和机械组装的方法。由于是对一整个坯料直接进行减材加工,加工精度要远高于加工两个组件在对其进行组装的情况。本发明通过打孔塞丝、套管切割或套管塞丝的方法,在金属棒的芯棒上制作自由端向外张开的金属刷丝。结合金属棒与金属管拉拔复合的制作工艺,使金属刷丝与芯棒、金属管同步拉拔及退火,金属刷丝也能牢固地连接在芯棒上。(The invention relates to a three-dimensional self-adjusting root canal file and a processing technology thereof, wherein two or the same material is firstly drawn and compounded into a composite embryonic body which is used as a blank of the root canal file, and then a handle, a connecting rod and a file body are respectively processed at different parts of the composite embryonic body. The process has the advantages that the method of compounding the blank body skillfully combines two different or same metal materials in a high-strength and completely seamless manner, and the combination strength is far superior to that of an adhesive method and a mechanical assembly method. Because the whole blank is directly subjected to the material reducing processing, the processing precision is far higher than the case that two components are processed and assembled. The invention relates to a method for manufacturing a metal brush wire with a free end expanding outwards on a core rod of a metal rod by a method of punching a plug wire, cutting a sleeve or plugging the sleeve. The metal brush wire, the core rod and the metal tube are synchronously drawn and annealed by combining the drawing and compounding manufacturing process of the metal rod and the metal tube, and the metal brush wire can also be firmly connected to the core rod.)
1. A processing technology of a three-dimensional self-adjusting root canal file comprises the following steps:
s1, manufacturing a metal bar, and manufacturing metal brush wires on the surface of the mandrel;
s2, manufacturing a composite blank body, wherein the composite blank body comprises a metal pipe and a metal rod, and placing the metal rod in the metal pipe for integral drawing and annealing to enable the metal pipe to form a compact package outside the metal rod;
s3, cold-drawing the composite embryo body until the diameter of the composite embryo body is slightly larger than or equal to the maximum diameter of the root canal file;
s4, dividing the composite blank into a handle and a file; removing the outer layer metal tube of the file body to expose the inner metal rod;
s5 shaping the metal brush wire on the metal bar.
2. The process of claim 1, wherein the self-adjusting file comprises: in the step S1, the core rod is a hollow tube, a hole is formed in the core rod, and a metal brush wire is inserted into the hole; and a part of the metal brush wires are arranged in the holes, and a part of the metal brush wires are attached to the outer surface of the core rod.
3. The process of claim 1, wherein the self-adjusting file comprises: in step S1, a plurality of layers of tubes are nested outside the mandrel to form the metal rod.
4. The process of claim 3, wherein the self-adjusting file comprises: in step S4, the tube is cut into a plurality of segments of rings in the circumferential direction, except for the mandrel, and a portion of the rings away from the handle is cut into an elongated strip in the axial direction.
5. The process of claim 1, wherein the self-adjusting file comprises: in the step S1, a plurality of circular rings are arranged on the outer surface of the mandrel at intervals, and a metal brush wire is inserted between the circular rings and the mandrel; the free ends of the metal brush wires extend out of the circular ring.
6. The process of claim 5, wherein the self-adjusting file comprises: the extending directions of the metal brush wires on each circular ring are the same or different.
7. A three-dimensional self-adjusting file made using the process of claim 1, wherein: the metal pipe comprises a metal pipe and a metal rod, wherein the shape of the inner surface of the metal pipe is matched with the shape of the outer surface of the metal rod; the metal rod is arranged in the metal pipe, and the metal pipe forms a compact package outside the metal rod; the metal pipe of the file body part is removed, and the metal rod inside is exposed outside; the surface of the metal rod is provided with metal brush wires with free ends which are outwards opened.
8. A three-dimensional self-adjusting file made using the process of claim 2, wherein: the metal pipe comprises a metal pipe and a metal rod, wherein the shape of the inner surface of the metal pipe is matched with the shape of the outer surface of the metal rod; the metal rod is arranged in the metal pipe, and the metal pipe forms a compact package outside the metal rod; the metal pipe of the file body part of the root canal file is removed, and the internal metal rod is exposed outside; the metal rod is a hollow core rod with a hole, one section of the metal brush wire is placed in the hole, and the other end of the metal brush wire is outwards opened to form the metal brush wire.
9. A three-dimensional self-adjusting root canal file made using the process of claim 3 or 4, wherein: the metal pipe comprises a metal pipe and a metal rod, wherein the shape of the inner surface of the metal pipe is matched with the shape of the outer surface of the metal rod; the metal rod is arranged in the metal pipe, and the metal pipe forms a compact package outside the metal rod; the metal pipe of the file body part of the root canal file is removed, and the internal metal rod is exposed outside; nesting a plurality of layers of pipes outside a core rod of the metal rod, wherein the pipes are cut into a plurality of sections of circular rings, and the parts of the circular rings, which are far away from a handle, are cut into slender strips; the free ends of the strips flare outwardly to form the metal brush filaments.
10. A three-dimensional self-adjusting file made using the process of claim 5, wherein: the metal pipe comprises a metal pipe and a metal rod, wherein the shape of the inner surface of the metal pipe is matched with the shape of the outer surface of the metal rod; the metal rod is arranged in the metal pipe, and the metal pipe forms a compact package outside the metal rod; the metal pipe of the file body part of the root canal file is removed, and the internal metal rod is exposed outside; a plurality of circular rings are arranged on the outer surface of the mandrel of the metal rod at intervals, and metal brush wires are inserted between the circular rings and the mandrel; the free ends of the metal brush wires extend out of the circular ring.
Technical Field
The invention relates to the field of medical instruments, in particular to a root canal file which can adapt to the internal form of a root canal of a tooth and can perform three-dimensional self-adjustment on the appearance of the file body and a processing technology thereof.
Background
The machine-used titanium-nickel alloy root canal file appears in the last 90 th century, and is popularized and applied in China around 2010, so that the level and efficiency of root canal treatment in the department of oral medicine are greatly improved. Particularly in the preparation of complex and fine root canals, it has significant advantages over conventional stainless steel root canal files. Compared with a stainless steel file body, the nickel-titanium alloy file body has the characteristics of good elasticity, low hardness, good flexibility and the like, can complete the preparation of the root canal in a shorter time, and simultaneously avoids excessive cutting of dentin in the root canal, thereby being deeply favored by oral clinicians.
At present, most of nickel-titanium alloy root canal files sold above adopt the modes of twisting, grinding, chemical treatment and the like, a file body is in a single-strand conical shape with threads, and the cross section of the file body is in a triangular shape, a rectangular shape and the like with a protruding part. In the root canal therapy art, the file body of root canal file is high-speed rotatory to the heart in patient's root canal under root canal motor's drive, and the protruding portion of the file body produces the cutting to the root canal wall at rotatory in-process to realize the effect of efficient clean and preparation root canal, beat the basis for the root canal therapy step on next step. Then, since the rotational trajectory of the file body is circular and most root canals have an oval or fissure-shaped cross-sectional configuration, it is difficult for the conventional nickel-titanium file to sufficiently clean the edges of the root canal.
For more thorough preparation of the root canal for endodontic procedures, a flocked file is disclosed, for example, in U.S. patent publication No.
The flexible fiber itself has a problem of being easily worn, and it is difficult to cut the inner wall of the root canal when rotating at a high speed, and it is impossible to completely remove plaque, residue, calculus, etc. attached to the inner wall of the root canal, and thus it is difficult to satisfy the requirement of the root canal preparation for sufficient cleaning of the root canal.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a three-dimensional self-adjusting root canal file with a metal brush wire, which is characterized in that an embryonic body is made by compounding a plurality of layers of materials outside a metal rod in which the metal brush wire is arranged, and then a handle and a file body are respectively processed on different parts of the same embryonic body, and a processing technology of the root canal file. Compared with the prior art that the fiber or metal bristles are adhered or welded to the file body, the metal brush wire is not easy to fall off when being elastically bent and deformed along with the shape of the root canal, so that the accuracy and the effect of the structural strength operation of the metal brush wire are greatly improved, and the failure probability in clinical use is reduced.
The technical scheme of the invention is as follows:
a processing technology of a three-dimensional self-adjusting root canal file comprises the following steps:
s1, manufacturing a metal bar, and manufacturing metal brush wires on the surface of the mandrel;
s2, manufacturing a composite blank body, wherein the composite blank body comprises a metal pipe and a metal rod, and placing the metal rod in the metal pipe for integral drawing and annealing to enable the metal pipe to form a compact package outside the metal rod;
s3, cold-drawing the composite embryo body until the diameter of the composite embryo body is slightly larger than or equal to the maximum diameter of the root canal file;
s4, dividing the composite blank into a handle and a file; removing the outer layer metal tube of the file body to expose the inner metal rod;
s5 shaping the metal brush wire on the metal bar.
In the step S1, the core rod is a hollow tube, a hole is formed in the core rod, and a metal brush wire is inserted into the hole; and a part of the metal brush wires are arranged in the holes, and a part of the metal brush wires are attached to the outer surface of the core rod.
In step S1, a plurality of layers of tubes are nested outside the mandrel to form the metal rod.
In step S4, the tube is cut into a plurality of segments of rings in the circumferential direction, except for the mandrel, and a portion of the rings away from the handle is cut into an elongated strip in the axial direction.
In the step S1, a plurality of circular rings are arranged on the outer surface of the mandrel at intervals, and a metal brush wire is inserted between the circular rings and the mandrel; the free ends of the metal brush wires extend out of the circular ring.
The extending directions of the metal brush wires on each circular ring are the same or different.
A three-dimensional self-adjusting root canal file manufactured by the process is characterized in that: the metal pipe comprises a metal pipe and a metal rod, wherein the shape of the inner surface of the metal pipe is matched with the shape of the outer surface of the metal rod; the metal rod is arranged in the metal pipe, and the metal pipe forms a compact package outside the metal rod; the metal pipe of the file body part is removed, and the metal rod inside is exposed outside; the surface of the metal rod is provided with metal brush wires with free ends which are outwards opened.
A three-dimensional self-adjusting root canal file manufactured by the process is characterized in that: the metal pipe comprises a metal pipe and a metal rod, wherein the shape of the inner surface of the metal pipe is matched with the shape of the outer surface of the metal rod; the metal rod is arranged in the metal pipe, and the metal pipe forms a compact package outside the metal rod; the metal pipe of the file body part of the root canal file is removed, and the internal metal rod is exposed outside; the metal rod is a hollow core rod with a hole, one section of the metal brush wire is placed in the hole, and the other end of the metal brush wire is outwards opened to form the metal brush wire.
A three-dimensional self-adjusting root canal file manufactured by the process is characterized in that: the metal pipe comprises a metal pipe and a metal rod, wherein the shape of the inner surface of the metal pipe is matched with the shape of the outer surface of the metal rod; the metal rod is arranged in the metal pipe, and the metal pipe forms a compact package outside the metal rod; the metal pipe of the file body part of the root canal file is removed, and the internal metal rod is exposed outside; nesting a plurality of layers of pipes outside a core rod of the metal rod, wherein the pipes are cut into a plurality of sections of circular rings, and the parts of the circular rings, which are far away from a handle, are cut into slender strips; the free ends of the strips flare outwardly to form the metal brush filaments.
A three-dimensional self-adjusting root canal file manufactured by the process is characterized in that: the metal pipe comprises a metal pipe and a metal rod, wherein the shape of the inner surface of the metal pipe is matched with the shape of the outer surface of the metal rod; the metal rod is arranged in the metal pipe, and the metal pipe forms a compact package outside the metal rod; the metal pipe of the file body part of the root canal file is removed, and the internal metal rod is exposed outside; a plurality of circular rings are arranged on the outer surface of the mandrel of the metal rod at intervals, and metal brush wires are inserted between the circular rings and the mandrel; the free ends of the metal brush wires extend out of the circular ring.
The invention has the following technical effects:
the invention provides a processing technology of a three-dimensional self-adjusting root canal file, which aims at the defects that the rotating track of a root canal file body is circular, the rotating speed is high, and attached fibers or metal bristles are easy to fall off, and provides a root canal file with metal brush wires, which is processed by adopting a composite embryoid body technology. The blank of the root canal file is a composite blank formed by drawing and compounding two or the same material, and then a handle, a connecting rod and a file body are respectively processed on different parts of the composite blank. The process has the advantage that the method of compounding the blank body skillfully combines two different or same metal materials in a high-strength and completely seamless mode, and the combination strength is far superior to that of an adhesive method and a mechanical assembly method. When the file body and the handle are manufactured, the material is directly reduced for a whole blank, the processing technology is continuous and has no error superposition, and therefore, the processing precision is far higher than the situation that the handle and the file body are processed respectively and then are assembled and connected.
The composite blank body of the three-dimensional self-adjusting root canal file is formed by placing a metal rod into a metal pipe, synchronously drawing and annealing for multiple times, so that the metal rod and the metal pipe are properly deformed, the metal pipe tightly wraps the metal rod or the metal rod bundle inside the metal pipe, and a stable connecting structure is formed between the metal pipe and the metal rod.
Further, since the shape of the inner surface of the metal pipe is matched with the shape of the outer surface of the metal rod, the sectional shape of the metal rod is a circle, an ellipse, or a polygon having a protrusion. In carrying out the root canal operation in-process, when using the root canal file to grind the brill operation, because the metal pipe closely wraps up the metal rod, relative displacement can not take place for file body and handle, even do not have welding or bonding between metal pipe and the metal rod, also can guarantee that the root canal file has high performance of controlling at the operation in-process.
The invention relates to a method for manufacturing a metal brush wire with a free end expanding outwards on a core rod of a metal rod by a method of punching a plug wire, cutting a sleeve or plugging the sleeve. The metal brush wire, the core rod and the metal tube are synchronously drawn and annealed by combining the drawing and compounding manufacturing process of the metal rod and the metal tube, and the metal brush wire can also be firmly connected to the core rod. Therefore, the problem that fluff fibers are easy to fall off in the flocking on the surface of the core rod in the prior art is solved, and the stability and the using effect of equipment in the operation are ensured.
The composite blank body has simple manufacturing process, the inner material and the outer material can be flexibly matched, the metal pipe and the metal rod of the composite blank body can be made of different materials, the use effect is not influenced while the material of the file body is ensured to meet the operation requirement, and the cost is convenient to control.
Drawings
FIG. 1 is a schematic view of a hollow mandrel used in example 1
FIG. 2 is a schematic view of the piercing on the mandrel in example 1
FIG. 3 is a schematic view showing a metal rod made by inserting a metal brush wire into a mandrel hole in example 1
FIG. 4 is a schematic view showing the insertion of a metal rod into a metal pipe in example 1
FIG. 5 is a schematic view of the composite green body obtained in example 1
FIG. 6 is a schematic view showing the case of removing part of the metal pipe of the rasp body in example 1
FIG. 7 is a schematic view showing the configuration of a brush wire of a roller brush in which the free ends of the metal brush wires are spread outward in example 1
FIG. 8 is a schematic view of a processing handle in example 1
FIG. 9 is a schematic view showing that the file is formed into a reverse tapered shape in example 1
FIG. 10 is a schematic view showing the insertion of a multi-layer metal pipe around a mandrel in example 2
FIG. 11 is a schematic view showing the insertion of a metal rod into a metal pipe in example 2
FIG. 12 is a schematic view of the composite green body obtained in example 2
FIG. 13 is a view showing the
FIG. 14 is a schematic view showing the cutting of the tube material into an elongated strip attached to a circular ring in example 2
FIG. 15 is a schematic view showing the shaping of a metallic brush wire having its free ends opened to the outside in example 2
FIG. 16 is a schematic view showing the same protruding direction of the metallic brush filaments embedded in the circular ring in example 3
FIG. 17 is a schematic view showing the insertion of a metal rod into a metal pipe in example 3
FIG. 18 is a view showing a case where a part of the metal pipe of the rasp body is removed in example 3
FIG. 19 is a schematic view of a processing handle in example 3
FIG. 20 is a view showing the configuration in which the free ends of the metallic brush filaments are formed to be flared outward in example 3
FIG. 21 is a schematic view showing the manner in which brush wires of different projecting directions are inserted into a ring according to example 4
FIG. 22 is a view showing the configuration in which the free ends of the metallic brush filaments are formed to be flared outward in example 4
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.