CN217593086U

CN217593086U - Novel root canal file

Info

Publication number: CN217593086U
Application number: CN202220819820.3U
Authority: CN
Inventors: 黄兵民; 刘晶; 向义; 林琳
Original assignee: Jiangsu Shengmate New Material Technology Co ltd
Current assignee: Jiangsu Shengmate New Material Technology Co ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-10-18
Anticipated expiration: 2032-04-08

Abstract

The utility model discloses a novel root canal file to the ingenious combination with two kinds of different or the same metal material high strength and complete seamless of method of compound idiosome, process out handle, connecting rod and file body respectively in the different parts of compound idiosome. One or more slag removing grooves are formed in the outer surface of the file body along the axial direction, and the depth of each slag removing groove is 0.05-0.4 mm. Because the surface of the file body sets up the scarfing cinder slot along the axis direction for the piece that produces when the abrasive drilling operation can temporarily hold in the slot, is favorable to timely clean the operation face, avoids the piece to be detained in drilling.

Description

Novel root canal file

Technical Field

The utility model relates to the field of medical equipment, concretely relates to novel root canal file.

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.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, provided one kind earlier through the compound preparation idiosome of multilayer material, later through the root canal file of integrative or the mode processing handle of components of a whole that can function independently and file the body. Compare in the prior art who uses single material, the utility model discloses a compound idiosome can superpose other good materials of welding property, improves the poor problem of nickel titanium alloy welding property, and greatly reduces the rate of utilization of high-priced material to improve the efficiency of course of working, thereby reduce the cost of manufacture of root canal file by a wide margin.

The technical scheme of the utility model as follows: a novel root canal file is characterized in that: the metal bar drawing device comprises a hollow metal tube and one or more than one metal bar, wherein the metal bar is placed in the metal tube and integrally drawn with the metal tube, so that the metal tube forms compact package outside the metal bar; the metal pipe positioned at the file body part of the root canal file is removed layer by layer, and the inner metal rod is exposed outside; the metal rod of the file body is a cone with a thread on the surface, and the cross section of the file body is gradually changed from the handle direction to the tip direction and comprises a polygon and a polygon; the size of an included angle between the inclined direction of the thread of the file body and the radial direction of the file body is continuously changed from the direction of the handle to the direction of the tip; one or more slag removing grooves are formed in the outer surface of the cone along the axial direction, and the depth of each slag removing groove is 0.05-0.4 mm; the metal tube at the handle portion of the file is retained and the outer surface of the metal tube at the handle portion is provided with anti-slip lines or surfaces.

Furthermore, the cross section of the file body can be in a shape of a triangle, a regular triangle, a rectangle with a concave bevel edge, a rectangle with a curved side quadrangle, two staggered semicircles or a four-tooth arris.

Furthermore, the angle of the screw thread gradually increases from the handle direction to the tip direction.

Further, the direction close to the handle is 30 degrees, the middle part is 40 degrees and the tip end is 50 degrees.

Further, the angle of the screw thread gradually decreases from the handle direction to the tip direction.

Further, the direction of approach to the handle is 50 °, the middle is 40 °, and the tip is 30 °.

Furthermore, the angle of the thread is small in the middle and large at two ends.

Further, the direction of approach to the handle was 40 °, the middle 30 °, and the tip 40 °.

The technical effects of the utility model are as follows:

the utility model discloses material to root canal file among the prior art is expensive, the processing cost is high, machining efficiency is low shortcoming, provides an adopt integral type root canal file of compound idiosome technology processing. 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 advantages that 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.

Further, the utility model discloses a compound idiosome technology is through putting into metal pole back a lot of synchronous an organic whole draw, annealing in the metal tube, makes moderate degree warp between metal pole and the metal tube, and the metal tube closely wraps up its inside metal rod or metal rod bundle, and then makes to form stable connection structure between metal tube and the metal rod. The combination of two different or identical metal materials with high strength and complete seamless performance has strength far superior to that of gluing and mechanical assembling. When the file is manufactured, because the material reduction processing is directly carried out on the whole blank, the processing technology is continuous and has no error superposition, thereby simplifying the processing technology and improving the accuracy.

Because the surface of the filing body is provided with the slag removal groove along the axial direction, the chips generated during the grinding and drilling operation can be temporarily contained in the groove, the operation surface is favorably cleaned in time, and the chips are prevented from being detained in the drilled holes

Drawings

FIG. 1 is a schematic view of the metal tube structure of the present invention

FIG. 2 is a schematic cross-sectional view of the metal rod of the present invention placed in the metal tube

FIG. 3 is a schematic view of the present invention with the file and the connecting rod removed

FIG. 4 is a schematic view of the file body and the integrally formed handle of the present invention

FIG. 5 is a schematic view showing that the sectional shape of the file body of the present invention gradually changes from a triangular shape having a concave part on the bevel side to a regular triangular shape from the handle direction toward the tip direction

FIG. 6 is a schematic view showing that the cross-sectional shape of the file body of the present invention gradually changes from a rectangular shape with a small aspect ratio to a rectangular shape with a large aspect ratio from the handle direction toward the tip direction

FIG. 7 is a schematic view showing that the cross-sectional shape of the file body of the present invention gradually changes from a curved four-sided shape to a staggered semi-circular shape from the handle direction toward the tip direction

FIG. 8 is a schematic view showing that the cross-sectional shape of the file body of the present invention gradually changes from a square-tooth ridge shape to a rectangular shape from the handle direction to the tip direction

FIG. 9 shows the central asymmetrical shape of the file with optional cross section

FIG. 10 shows a file with a central symmetrical cross-section

FIG. 11 is a schematic view showing the gradually increasing angle of the thread of the file body from the handle to the tip

FIG. 12 is a schematic view showing that the angle of the thread of the file body of the present invention gradually decreases from the handle direction to the tip direction

FIG. 13 is a schematic view showing the middle of the angle of the screw thread of the file body of the present invention being small and the two ends being large

FIG. 14 is a schematic view showing the large middle angle and the small ends of the thread of the file body of the present invention

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Because nickel titanium alloy is expensive, and the root canal file is disposable consumptive material, for reduce cost, the titanium nickel alloy root canal file on the existing market all adopts the nickel titanium file body and stainless steel handle to process production respectively. The nickel-titanium alloy material has poor welding performance and cannot be combined with the stainless steel handle in a welding mode, so that all manufacturers assemble the nickel-titanium alloy material and the stainless steel handle in a gluing or assembling mode. The assembly process generally has the problems of poor cohesive structure strength, difficulty in ensuring assembly accuracy and the like. Especially, in the application process of the product, namely when the product is assembled on a root canal motor and rotates and grinds the root canal of the tooth at a higher rotating speed, the loosening and even separation are easy to occur, which brings extremely adverse effect to the treatment of an oral clinician.

As shown in fig. 1 and fig. 2, the composite blank of the novel root canal file of the present invention comprises a metal tube 1 and a metal rod 2, wherein the metal rod 2 is drawn synchronously with the metal tube 1 in the metal tube 1, and the metal tube 1 forms a compact and stable wrapping structure outside the metal rod 2.

And (3) performing cold-drawing diameter reduction on the composite body of the metal pipe 1 and the metal rod 2 until the diameter of the composite body is slightly larger than or equal to the diameter of a handle required by the root canal file to form a composite embryo body.

As shown in fig. 3, the composite embryo is processed by reducing the material, namely, a handle 3, a file body 4 and a connecting rod 5 of the stroke root canal file; partially removing the metal tube 1 on the outer layer of the connecting rod 5 to enable the thickness of the metal tube 1 attached to the outer part of the connecting rod 5 to be 0.05-0.4 mm; the outer layer metal tube 1 of the file body 4 is removed by grinding or chemical means, and the inner metal rod 2 is exposed.

As shown in FIG. 4, the metal rod 2 is formed into a file 4 having a screw thread on the surface thereof, the screw thread being distributed in a shape which tends to be close to the tip; and a slag removing groove 6 for containing crushed slag is longitudinally arranged on the outer surface of the cone, and the depth of the slag removing groove is 0.05-0.4 mm. The handle 3 is machined into a required shape, and the outer surface of the handle is provided with anti-skidding threads or anti-skidding surfaces, wherein the anti-skidding surfaces are multi-edge surfaces arranged along the circumferential direction of the handle.

In this embodiment, the cross-sectional shape of the rasp body 4 may be a circle, a polygon or a polygon which is continuously changed from the handle direction to the tip direction. For example, as shown in FIG. 5, the cross-sectional shape of the rasp body 4 gradually changes from a triangular shape having a concave on the hypotenuse to a regular triangular shape from the handle direction toward the tip direction. As shown in FIG. 6, the cross-sectional shape of the rasp body 4 is changed from a rectangular shape having a small aspect ratio to a rectangular shape having a large aspect ratio from the handle direction toward the tip direction. As shown in FIG. 7, the cross-sectional shape of the rasp body 4 is gradually changed from a curved four-sided shape to a displaced semicircular shape from the handle direction toward the tip direction. As shown in fig. 8, the cross-sectional shape of the rasp body 4 is gradually changed from four-tooth edge shape to rectangle from the handle direction to the tip direction.

Thus, the cross-sectional shape of the rasp body 4 may be the same in the direction from the handle to the tip, or may be a combination of various shapes. The cross-sectional shape may be selected from a centrally asymmetric shape as shown in fig. 9 and a centrally symmetric shape as shown in fig. 10.

In this embodiment, the size of the included angle between the inclined direction of the thread of the file body 4 and the radial direction of the file body can be changed from the direction of the handle to the direction of the tip. As shown in fig. 11, the angle of the thread gradually increases from the handle direction to the tip direction, for example, 30 ° in the direction close to the handle 3, 40 ° in the middle, and 50 ° at the tip. As shown in fig. 12, the angle of the thread decreases from the handle direction to the tip, for example, 50 ° in the direction close to the handle 3, 40 ° in the middle, and 30 ° at the tip. As shown in fig. 13, the angle of the thread is small in the middle and large at both ends, e.g. 40 ° towards the handle 3, 30 ° in the middle and 40 ° at the tip. As shown in fig. 14, the angle of the thread is large in the middle and small at the ends, e.g. 30 ° towards the handle 3, 40 ° in the middle and 30 ° at the tip.

It should be noted that the above-described embodiments can enable those skilled in the art to more fully understand the present invention, but do not limit the present invention in any way. Therefore, although the present invention has been described in detail with reference to the drawings and examples, it should be understood by those skilled in the art that the present invention can be modified or replaced by other embodiments, and in any case, all technical solutions and modifications which do not depart from the spirit and scope of the present invention should be covered by the scope of the present invention.

Claims

1. A novel root canal file is characterized in that: the metal bar drawing device comprises a hollow metal tube and one or more than one metal bar, wherein the metal bar is placed in the metal tube and integrally drawn with the metal tube, so that the metal tube forms compact package outside the metal bar; the metal pipe positioned at the file body part of the root canal file is removed layer by layer, and the internal metal rod is exposed outside; the metal rod of the file body is a cone with a thread on the surface, and the cross section of the file body is gradually changed from the handle direction to the tip direction and comprises a polygon and a polygon; the size of an included angle between the inclined direction of the thread of the file body and the radial direction of the file body is continuously changed from the direction of the handle to the direction of the tip;

one or more slag removing grooves are formed in the outer surface of the cone along the axial direction, and the depth of each slag removing groove is 0.05-0.4 mm; the metal tube at the handle portion of the file is retained and the outer surface of the metal tube at the handle portion is provided with anti-slip lines or surfaces.

2. The novel root canal file according to claim 1, wherein: the cross section of the file body can be in a shape of a triangle, a regular triangle, a rectangle with a curved side quadrangle, two staggered semicircles or a four-tooth arris with a concave oblique side.

3. The novel root canal file according to claim 1 or 2, wherein: the angle of the screw thread gradually increases from the handle direction to the tip direction.

4. The novel file according to claim 3, wherein: the approach handle direction is 30 °, the middle 40 ° and the tip 50 °.

5. The novel root canal file according to claim 1 or 2, wherein: the angle of the screw thread is gradually reduced from the handle direction to the tip direction.

6. The novel root canal file according to claim 5, wherein: the direction near the handle is 50 degrees, the middle part is 40 degrees, and the tip end is 30 degrees.

7. The novel root canal file according to claim 1 or 2, wherein: the angle of the thread is small in the middle and large at two ends.

8. The novel root canal file according to claim 7, wherein: the direction of the handle is 40 degrees, the middle part is 30 degrees and the tip is 40 degrees.