CZ27094A3 - Dental root instrument k-file and process for producing thereof - Google Patents

Abstract

The K-file Dental root instrument consists of a handle (2) and in it there is a flexible bar, which tapers towards the top (1), for insertion into the root canal. The bar (1) is equipped with a rotary quadruple thread spiral (4) with grooves terminating in the cutting and return edges modified along its length, the cross-section of which is oval. The side spiral groove (9) terminates in the blade of the cutting edge (6) on its larger diameter (7) and the side spiral groove (9) terminates in the blade of the return edge (5) on its lower diameter (8). By rotating grinding on the basic semi-product of the cone a head (3) is created, then while the basic semi-product is rotated and moved the spiral groove is ground (9) and the blade of the cutting edge (6) is ground at an angle of the blade less than 50 degrees on the first spiral (4), and the spiral groove (9') is ground and the blade of the return edge (5) is ground at an angle greater than 120 degrees during the gradual turning and moving on the second spiral (4). The final shaped semi-product is equipped with a handle.<IMAGE>

Description

Field of the Invention - Dental root tool k-pinpin and process for its production

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental root tool for a nail file. comprising a flexible, tapered rod for widening and cleaning the root canals of the teeth and a method for producing the same.

BACKGROUND OF THE INVENTION

In general, there are three types of hand-held and root root tools that are used to clean the root canals. The first is the intracranial piiník or. K-pin. It is essentially a conical rod with a square magic axially twisted way. to create a tool. Twist creates four spiral cutting edges on the tool. This tool is generally considered to be the strongest of all three types of tools used for this purpose. It is used as a piin <there. wherein it is to be reciprocated by axial movement into the root canal to remove the pulp from the canal. . j,

The second type of tool is a conical rod with a triangular base. This rod is also twisted so. to form a tool, the twisting forming three helical cutting edges on the tool. This tool is generally considered to be the best cutting tool and is preferably used as a spacer. it is introduced into the root canal and rotated so. to expand and enlarge! channel. ....... ...

The third type of tool is. Hedstrom's file - Hedstrcm's file is a cylindrical conical rod that is grooved by grinding along a cone in a helical pattern in such a way as to form the final tool. Hedstrom's file is generally regarded as' ·· »<!., I .....

the widest of these tools, but at the same time is considered a tool. which has the best waste disposal characteristics. Each of these three tools has certain advantages.

For example, a K-pin or square tool is rigid but has a worse cutting performance than a triangular tool and does not have such a waste insertion characteristic as. Hedstrom piiník. Terno piiník, however, is the widest of all the above

tools.

The last 2 rows of these dental root instruments are K-flex. Its characteristic lies in it. it has two edges sharper than the other two. This interdental tool combines the best capabilities of each of the three standard types and is a solid tool with relatively good cutting and waste disposal characteristics. The tool can be characterized by one aspect, namely the pin or extension part, which is made by twisting along a conical rod with a parallelogram base. In other words, the cut of the rod has the shape of a parallelogram with two acute and two obtuse angles. This twisting arrangement gives a file with a larger diameter, approximately corresponding. the diagonal of the parallelogram. The spiral cutting edges formed when the bar is twisted only extend along the ends of the main diameter of the in-tool tool. The disadvantage of this tool is that. that the cutting edge does not have a perfect cutting edge, which is evident on this tool, especially at the tip. This lack of manifestation! especially at small diameters and is caused by the production technology, because the clamping jaws distort the individual edges during the turning; ...

It is known to produce a tool as described above, which is produced by grinding a conical rod into a shape with a parallelogram profile: This profile is either a rhombus 7 '', 7 '' ', 7' ''. /.7 or kcsodéiník. After the bar has been shaped by grinding so that its cross section has an appropriate parallelogram shape, the base blank is axially twisted by 10 to

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or more. This twirling udeii will set up cryri spiral gates. The tool thus fixed is attached to the handle in any manner known for completing tarpaulins. Despite the fact that the tool is manufactured, they exhibit very good tensile properties or good stiffness. it is not negligible that for their production one additional technological operation is necessary, which is necessary to create spiral edges.

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The nature of the invention

The above drawbacks are overcome by the dental root tool to the piinix folding the flexible o to the top of the tapering rod for introduction into the

-3kcnálku. whose essence lies in it. the rod is opcTrená rotary double-helix. the cross-section of which is oval with the cutting edge and the leading edge between them. wherein the cutting edge and the leading edge are provided along the entire length of the helix.

The advantage of the dental k-file root is that the cutting edges of the grinding tool have a long tool life. Team. that the helix is ground and not twisted, the tool is also characterized by high flexibility when used in indirect dental channels. High durability is achieved by this. that the cutting edges have a bite angle less than 50 ° and the trailing edges have a cutting edge angle greater than 20 ^° . wherein the rod is terminated by a tip of approximately 60 °.

Using ground two-wire helix. oválovitého oňtu profile when the angle of the cutting edge of less than 50 ⁰ and the angle bníu discharge edge i20 greater than ⁵ is achieved by the effects of high cutting tools, large material removal and improved removal of shavings waste. This feature is achieved by grinding the cutting edge at a predetermined angle ... The essence of the preferred method of manufacturing a dental instrument is that. that. by rotary grinding, the tip of the cone is tilted first by tipping, then, with successive rotation and simultaneous movement of the workpiece bases, the cutting edge is ground by a coincidence of the cutting edge less than an angle. 50 / jnq first screwboy, then. se _; the base blank is rotated with an angle of less than 90 and the grinding of the cutting edge is performed. .. .- - - r - γ * ¹ · .....

discharge edges with an angle greater than 20 ^° from successive rotation and simultaneous r. .7 ~ -cr ys-u.

The second helical feed and thus shaped piece are provided with a handle. This method of production makes it possible to omit one technological operation and tc tapping.

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The tool according to the invention will be explained with reference to the drawing in which: FIG

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Fig. 4 shows a complex view of the aenthal root tool K-pin handle; Fig. 2 shows a detailed illustration of the dental root tool k-file. Fig. 3 shows a dental root tool K-file with an oval profile in section.

DETAILED DESCRIPTION OF THE INVENTION

The described dental root tool k-file according to Fig. 1 comprises a handle 2 which has protrusions 12 in its central part. to facilitate tool handling. Its truncated cone-shaped T-shaped part is provided with a ground rotating double-point helix 4 of an oval profile. Further, cutting edges 5, whose cutting edges have an angle of less than 50 [deg.], Are provided on the ground rotary double-helix I. and, on the other hand, the trailing edges δ. whose blades have an angle greater than 120 °. The rod 1 is terminated by a tip 3 whose angle is approximately 60 °. This grinding configuration gives a tool with a larger diameter 7 corresponding to the cutting edge 5 and a smaller diameter 3 corresponding to the leading edge δ. The helical cutting edge 6 only extends along the ends of the larger diameter 7 of the tool while the leading edge 6 extends only along the ends of the minor diameter 8.

The dental root instrument K-piiník is used to clean c of the dental canal. The tool is handled manually in that way; it is gripped between the fingers by the handle 2 in - ·· -. ~ - * 7- · '- · · - ^ · \. -. , V.i.r> - ·. ? In place of its projections 12 and in a rotary motion, the cutting edge edges 5 are removed from the pulp which is the cutting edge edges away from the tooth channels.

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The dental instrument is manufactured on a single-purpose machine. wherein the first grinding wheels polished tip 3 with an angle OO ^0th Simultaneously with this operation, the déntáiní root of the K-file is aligned to the working length. The first helix 4 is formed with the rotation of the elements i with respect to the abrasive elements

^{1 to 5-} discs at its current shift. This procedure is no R / CCE j. Oroveae grinding cutting edges of the cutting edge 5 with an angle of less than 50 ^0. Between the first cut of the first helix and the second helix, the rod 1 is rotated by an angle less than 90 ^° . This operation results in an oval cross-section. Next, the distance between the grinding wheel and the tool to be ground is changed and the second helix 4 is continued to be ground while the rod 1 is rotated with respect to the grinding wheels at the same time. In this way, the cutting edges of the leading edges 6 with a cutting angle greater than 120 ° are ground.

Industrial applicability

The dental root instrument K-file is applicable in dentistry. The geometrical shape of the coiin is out of use for the conventional rotary / impact cannula suitable for use in dental drills provided with a drip. In this case, in addition to the rotary motion, the K-file also performs a return movement in the direction of the tool axis. In this way of use, the shape advantages of the K-pillar are manifested. which is characterized by high cutting power. which is related to the large amount of mcteria c and hence the spread

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kanalkuzubu.

Claims (3)

PATENT CLAIMS What is claimed is: 1. A dental root instrument k-ptik comprising a flexible and tapering rod for insertion into a root canal, characterized in. The rod (1) is provided with a rotating double-point helix (4). Its cross-section is oval with the cutting edge lip (5) and the leading edge lip (6) therebetween. wherein the cutting edges (5) and the leading edges (δ) are provided along the entire length of the helix (4). 2. The root tool according to claim 1, characterized in that. that. the cutting edge (5) has a cutting edge angle of less than 50 ^° and the leading edge (δ) has a cutting edge angle greater than the rod (1) being terminated by a tip (3) whose angle is approximately 0 ° C. 3. A method for producing a diurnal root k-pin tool according to claim 1, characterized in that? with it. In this case, by rotary grinding, on the base cone-shaped workpiece, the tip is first tipped, then with gradual rotation and simultaneous movement of the workpiece, the cutting edge is cut with a bnt angle less than 50 ^° nc by the first helix. then rotates about poiotovar base angle is less than 90 - and through the grinding-cutting-discharge nrany úhiem with greater-than 120 inclined with ^'0 for the gradual and simultaneous rotation dosuvu but the second helix and the preform thus provided with the handle.