JP6861330B1 - Periodontal equipment polishing method and polishing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a periodontal instrument polishing device capable of safely, easily and highly accurately polishing a periodontal instrument such as a curette and a scaler without requiring much skill. SOLUTION: A disk is fixed to a rotating shaft connected to a motor inside a main body, and water resistant sandpaper is reattachably attached to the upper surface of the rotating disk via an adhesive double-sided tape to form a polishing sheet. .. By addressing and sliding the blade surface of the periodontal instrument at an appropriate angle and pressure while using a water supply device and an angle guide together on the stable polishing surface formed by the rotation of the polishing sheet. Safe and easy high-precision polishing is possible. [Selection diagram] Fig. 1

Description

The present invention is a polishing device for improving the polishing of periodontal instruments such as curettes and scalers, and in particular, periodontal instrument polishing in which water-resistant sandpaper is reattached to a rotating disk to form a polishing sheet. Regarding the device.

Periodontal disease, which is also called a national disease, affects about 70% of adults now, and the proportion of people with advanced periodontal disease has not improved. For the prevention and treatment, it is most important to remove plaque and tartar deposited in the gap called the periodontal pocket between the tooth and the gum, and to smooth the root surface.

At that time, the instrument used is a periodontal instrument such as a curette or a scaler (hereinafter referred to as a periodontal instrument). The periodontal instrument is an instrument with an extremely fine blade that is inserted into an extremely narrow periodontal pocket with a width of about 0.5 mm to remove tartar adhering to the root surface and for cleaning contaminated cementum.

In order to improve treatment efficiency, it is indispensable to use a sharp-edged instrument. However, it is extremely difficult to accurately polish an instrument with an extremely small cutting edge having a major axis of about 4 mm and a blade width of about 1 mm.

Conventionally, as shown in FIG. 2, in the case of manual polishing, the periodontal instrument is held in one hand and the grindstone 16 is held in the other hand for polishing, but both hands are freehand and reliable. It is difficult to fix the blade, and it is also difficult to directly see the cutting edge, and it is extremely difficult to accurately polish a small blade having a major axis of about 4 mm and a blade width of about 1 mm, which has been performed by a limited number of skilled workers. General workers such as dentists and dental hygienists were inefficient in terms of time and labor, and the workers were under great stress. (See Non-Patent Document 1 and Non-Patent Document 2)

Further, although the grindstone is expensive, if the polishing performance deteriorates due to uneven wear and wear, it has to be replaced, which causes a problem in terms of cost. Further, although the periodontal instrument is extremely expensive, if the cutting edge is worn or deformed due to improper polishing work, it must be discarded at an early stage, which poses a big problem in terms of cost.

Further, in the case of mechanical polishing, most of the polishing devices perform polishing by rotating or reciprocating the grindstone by driving a motor, but the moving speed of the grindstone is relatively fast, and the grain size of the grindstone is about 600. Since it is relatively rough, the cutting edge of the periodontal instrument wears a lot. Furthermore, most of them are dry sharpening that does not use water or oil, and there are problems that the fine cutting edge of periodontal instruments is easily affected by frictional heat and the material deteriorates and the instruments do not last long. Although the grindstone itself is expensive, if the polishing performance deteriorates due to clogging with metal powder, or if uneven wear or wear occurs, it is necessary to replace the grindstone, which poses a problem in terms of cost. (See Non-Patent Document 3, Non-Patent Document 4,)

There is also a mechanical polishing method in which the periodontal instrument is fixed with a cage and linked with a motor-driven rotary grindstone to automatically polish the cutting edge of the periodontal instrument, but it is extremely expensive. Therefore, the operation is complicated, it takes time to fix one instrument to the cage, and if the fixing is inaccurate, it is difficult to accurately polish the cutting edge. There were problems such as the grindstone having a relatively coarse grain of about 600 to 800 and a large amount of wear on the cutting edge. (See Patent Document 1 and Non-Patent Document 5)

In general dental clinics, attempts have been made in various ways to sharply regenerate the cutting edge of a dull periodontal instrument as if it were new. However, it is impossible to secure mechanical equipment with a well-equipped manufacturing process for periodontal instruments and skilled workers, and general workers such as dentists and dental hygienists in accurate polishing of periodontal instruments. Many of them were under intense stress.
In general dental clinics, it has been desired to develop a polishing device that does not require much skill and can sharply regenerate a dull periodontal instrument as if it were new with a machine that is easy to handle.

Patent 2555591

Masami Sato The, Sharpening, Ishiyaku Publications, Inc., May 20, 2017, p. 1-82 Hiroshi Nakatani et al., Gakken Shoin, Scaling & Root Planing, October 1, 2006, P.M. 32-40, P.M. 82-88 Instrument Electric Sharpener, LM Rondo Plus, Shiramizu Trading Co., Ltd., 2016 Sharpener Ribbon Instruction Manual, YDM Co., Ltd., Morita Co., Ltd., 2017 Periostar 3000 Instruction Manual, Shiramizu Trading Co., Ltd., 2013

Considering the manufacturing process of periodontal instruments such as curettes and scalers, a skilled craftsman injects sufficient water into the polished surface of the edge of a large, thick, disc-shaped grindstone that rotates vertically to keep the blade surface of the instrument constant. It is common that a sharp cutting edge is formed by applying at an angle and a constant pressure, and a sharp instrument is manufactured. In recent years, robots have begun to be introduced into the manufacturing process.

In general clinics, attempts to regenerate the cutting edge of a dull instrument as sharply as before have been made by various methods. However, it was impossible to secure equipment and skilled craftsmen, and it was extremely difficult to sharply regenerate the cutting edge of a periodontal instrument having an extremely fine blade.

Conventional periodontal instruments have been polished manually or mechanically using a grindstone. Most of the grindstones used have a grain size in the 600s, which is relatively coarse. When the cutting edge polished with a coarse whetstone is enlarged, it has a large serrated shape as described later with reference to FIG. 8, and the tip of the large serrated cutting edge is abraded by use and becomes rounded and sharp. It is easy to lose the sharpness and reduce the sharpness. On the other hand, if it is polished with a grindstone having a very fine particle size, the cutting edge has an extremely small serrated shape, and the sharpness is not easily deteriorated. However, the finer the particle size of the grindstone, the more likely it is that the polishing performance will deteriorate due to clogging due to metal powder, which causes a contradiction.

Further, in general, when polishing the blade of an instrument including a periodontal instrument, the most stable polishing can be performed by fixing both the instrument and the grindstone.

In the polishing of periodontal instruments, manual polishing is performed by holding both the periodontal instrument and the grindstone by hand, so that the fixing becomes unstable and accurate polishing is difficult. In mechanical polishing, a stable polishing surface can be secured by rotating or reciprocating the grindstone, but if the grain size of the grindstone is fine, the polishing performance tends to deteriorate due to clogging of metal powder, etc., and the grain size becomes coarse to some extent. Therefore, there are problems that the periodontal instrument is heavily worn and that the material of the cutting edge of the periodontal instrument is easily deteriorated due to frictional heat because it is difficult to grind with water.

In view of the above-mentioned problems of the prior art, the present invention provides a periodontal instrument having an extremely fine blade in a general dental clinic, such as a dentist, a dental hygienist, etc., without requiring much skill. It is an object of the present invention to provide an improved periodontal instrument polishing device so that a worker can perform polishing safely, easily and with higher precision.

In order to achieve the above object, in the present invention, a rotating shaft connected to a motor housed inside the main body protrudes from the upper surface of the main body, and is attached to the upper surface of a disk fixed to the rotating shaft via an adhesive double-sided tape. It is characterized in that a polishing sheet (hereinafter, a rotating disk to which a circular water resistant sandpaper is attached is referred to as a polishing sheet) is provided by attaching a water resistant sandpaper to a reattachable type.

The polishing apparatus for periodontal instruments of the present invention has a structure having a rotation speed adjusting function and a rotation direction reversing function.

The particle size of the water resistant sandpaper is coarse (400 to 600), medium (800 to 1000), fine (1200 to 2000), and extra fine (3000).

The circular water-resistant sandpaper to be attached to the rotating disk has a slightly larger diameter than the rotating disk, and has a through hole in the center having a slightly larger diameter than the rotating shaft protruding from the upper surface of the main body. Further, the adhesive double-sided tape attached to the back surface of the circular water-resistant sandpaper is provided with a bow-shaped protrusion as a part of the release paper.

It is equipped with a water supply device that can be detachably used and a blade angle guide.

The water supply device has an upper and lower opening formed of a rectangular plate-shaped frame, and a rectangular parallelepiped sponge brush having substantially the same shape and a slightly larger size is press-fitted into the space surrounded by the plate-shaped frame. .. The lower end of the sponge brush slightly protrudes from the plate-shaped frame and comes into contact with the polishing sheet. The plate-shaped frame is fixed to the left side of the center on the rear surface of the arm member whose front surface crosses the upper surface of the central portion of the rotating disk.

The arm member has a circular cross section, a rod shape, passes through the center of the rotating disk, and extends laterally above the rotating disk in parallel with the rotating disk at short intervals. Both ends are slightly longer than the rotating disk and bend downward at a right angle, showing a U-shape toward the bottom with hanging legs, and the legs are attached to and detached from the receiver provided on the side surface of the main body. It can be fixed by screwing or the like. A disk is fixedly installed at an appropriate position on the leg.

A rectangular notch with a major axis slightly shorter than the radius of the rotating disk is formed on the front surface of the right half of the arm member, and an inclined surface (hereinafter referred to as a notched slope) descending forward and downward is formed. However, the notched slope forms an angle of 40 degrees with respect to the rotating sheet to form a blade angle guide.

The periodontal instrument polishing device according to the present invention has the above-mentioned configuration and has the following effects.

(1) A stable polishing surface is formed by rotating the polishing sheet, and while looking directly at the cutting edge of the periodontal instrument, hold the instrument firmly with both hands or one hand using the blade angle guide, and it is appropriate. Since it is possible to concentrate on angle adjustment and pressure adjustment, more accurate polishing becomes possible (see FIG. 3).

(2) Even if the grindstone is expensive, if the polished surface is worn or unevenly worn due to use, the polishing performance will deteriorate and it will have to be replaced. By using inexpensive, replaceable water-resistant sandpaper instead of the grindstone, high-precision polishing performance can be maintained, leading to further cost reduction.

(3) The particle size of the water resistant sandpaper is 400 to 3000, coarse (400 to 600), medium (800 to 1000), fine (1200 to 2000), and extra fine (3000). It has a wide width and can be used in various situations of the cutting edge of periodontal instruments. That is, if there is a large amount of wear such as chipping or deformation of the cutting edge, coarse or medium grain is used for fine finish polishing after shape correction, and if the sharpness is simply reduced, fine or extra fine grain is applied from the beginning. By using eye objects, wear of the cutting edge of the instrument is minimized, and more delicate and high-precision polishing becomes possible.

(4) By supplying water to the polished surface made of rotating water-resistant sandpaper and performing so-called water polishing, static electricity and frictional heat are suppressed and polishing residue is discharged, resulting in a clean and stable finish. In addition to being obtained, it is possible to prevent metal deterioration and prolong the life of the equipment.

(5) By using the periodontal instrument polishing device of the present invention configured as described above, general work such as a dentist or a dental hygienist in a general dental clinic does not require a high degree of skill. A person can polish periodontal instruments safely, easily, and with high accuracy.

(6) By always using sharp instruments, periodontal disease treatment such as tartar removal becomes easier, which not only reduces the fatigue of surgeons such as dentists and dental hygienists, but also makes patients feel comfortable. Improve satisfaction.

In Japan, where the super-aging society is advancing, the relationship between periodontal disease and general health is being criticized, and it is possible that improving the effect of periodontal disease treatment can contribute to the extension of healthy life expectancy.

It is a perspective view which shows the whole of the polishing apparatus for periodontal instruments by one Embodiment of this invention. It is a figure which shows one Embodiment of the periodontal instrument manual polishing. It is a perspective view which shows one Embodiment (curette polishing) of the periodontal instrument polishing apparatus of this invention. It is a perspective view of the arm member fixed to the left and right side surface receivers, and is the enlarged view of the blade angle guide. (The main body is omitted). It is a figure which shows the polishing apparatus for periodontal instruments of this invention, and is the exploded perspective view at the time of turning an arm member. It is an exploded perspective view of the polishing sheet of the polishing apparatus for periodontal instruments of this invention, (A) is a water resistant sandpaper, (B) is an adhesive double-sided tape, and (C) is a rotating disk. It is a partial perspective view of a periodontal instrument (curette), and is an enlarged perspective view of the blade portion thereof. It is a comparative enlarged view of the same magnification of the cut edge of the periodontal instrument (curette) for coarse polishing and ultra-fine polishing, (A) is an enlarged view of the cutting edge after coarse polishing, and (B) is after ultra-fine polishing. It is an enlarged view of the cut edge of. It is a partially enlarged cross-sectional view showing an embodiment of curette polishing using a blade angle guide, and (A) is a cross section taken along the line AA'of FIG. 6 (B), with the upper edge of the notched slope as a fulcrum. The shank shows polishing at an angle of 30 degrees with the polishing sheet, (B) is the cross section along the BB'line of FIG. 6 (B), and the first shank is in contact with the blade angle guide slope and polished. Polishing at an angle of 40 degrees with the sheet is shown, (C) is the CC'line of FIG. 6 (B), and the first shank is 65 degrees with the polishing sheet with the lower edge of the notched slope as the fulcrum in the cross section. It is an enlarged cross-sectional view which shows the polishing in the state of the angle of. (A) is a partial perspective view of a periodontal instrument (sickle-shaped scaler), and (B) is a cross section of the blade portion along the DD'line at an angle of about 10 degrees between the first shank and the polishing sheet. It is an enlarged cross-sectional view which shows the state of polishing.

Hereinafter, a practical form embodying the present invention will be described with reference to the drawings. In the following description in the drawings, the upper side shows the upper surface of the device of the present invention, the lower side shows the lower surface of the device, the right side shows the right side surface when the device is viewed from the front, and the left side shows the device from the front. The left side surface when viewed is shown, the front surface shows the front surface of the device, and the rear surface shows the rear surface of the device.

With reference to FIG. 1, the periodontal instrument polishing apparatus of the present practical form includes a rotating disk 6 fixed to a motor-driven rotating shaft 4 protruding from the upper surface of the main body 2. A water resistant sandpaper 8 is attached to the upper surface of the rotating disk 6 via an adhesive double-sided tape to form a polishing sheet 10. The periodont instrument polishing device of the present invention includes a rotation speed adjusting knob 12 and a rotation direction changeover switch 14, and the rotating disk 6 is capable of adjusting the rotation speed and reversing forward and reverse, and is suitable for delicate polishing of an extremely small cutting edge. Is.

With reference to FIG. 3, a stable polishing surface is formed by rotating the polishing sheet 10, and when polishing the periodontal instrument, both hands are used with the water supply device 26 and the blade angle guide 20 looking directly at the cutting edge. Alternatively, the instrument can be held firmly with one hand and can be slid while concentrating on appropriate angle adjustment and pressure adjustment, enabling more accurate polishing.

With reference to FIGS. 4 and 7, on the front surface of the right half of the arm member 18 extending laterally above the center of the rotating disk 6, with a major axis slightly shorter than the radius of the rotating disk 6. A rectangular notch is formed to form an inclined surface that descends forward and downward, that is, a notched slope 76. The notched slope 76 forms an angle of 40 degrees with respect to the polishing sheet 10 to form a blade angle guide 20. Stable polishing can be performed by sliding the blade surface onto the polishing sheet 10 while applying the first shank 48 of the periodontal instrument held by the fingers parallel to the notched slope 76, with respect to the upper surface 54 of the blade portion. The side surface 56 is formed at an angle of 70 degrees. That is, a cutting edge having a cutting edge 60 of 70 degrees is formed. However, the angle of the cutting edge 60 differs depending on the type of periodontal instrument, and further, as will be described later with reference to FIG. 7, even in the same instrument, depending on the portion of the blade 46, for example, the base 66 of the blade 46. Since the angle of the cutting edge 60 is different between the central portion 68 and the tip portion 70, the blade angle guide 20 should be considered as a guide only.

By polishing the surface of the water resistant sandpaper 8 while wetting it with water, so-called water sharpening can be performed. Wetting with water is carried out by any suitable method.

With reference to FIGS. 3 and 4, a rectangular plate-shaped frame 22 is fixed to the rear surface of the left half from the center of the arm member 18, and a rectangular parallelepiped sponge brush 24 having a size slightly larger than the plate-shaped frame 22 is press-fitted. Water is supplied to the polished surface composed of the water resistant sandpaper 8 which rotates by dropping water from the upper surface as appropriate to the sponge brush 24 which is in contact with the surface of the water resistant sandpaper 8 by using the water supply device 26. be able to. In this case, by adding a very small amount of neutral detergent to water (1 to 2 drops of neutral detergent in 50 CC of water), it acts as a surfactant, the water repellency of the water resistant sandpaper surface is suppressed, and it is easy to get wet.
Further, it is efficient to immerse the sponge brush in water in advance, squeeze it lightly, and then drop water on the upper surface of the sponge brush with a dropper or the like.

Alternatively, a brush of an appropriate size may be moistened with water and applied to the surface of the water resistant sandpaper 8 to wet the surface. At that time, it goes without saying that a very small amount of neutral detergent is added to the water. The amount of water on the surface of the water-resistant sandpaper 8 is sufficient to be slightly wet, and it is not necessary to pour water to the surroundings because it is polishing an instrument with a fine blade.
Water is supplied to the polished surface made of the rotating water resistant sandpaper 8 to enable water polishing and suppress static electricity and frictional heat. In addition, sharpening residue is discharged, a clean and stable finish can be obtained, metal deterioration can be prevented, and the instrument can be used for a long time.

With reference to FIG. 5, the arm member 18 crossing the polishing sheet 10 is rotated around the left side receiver 30 of the main body because the arm member 18 is detached forward from the receiver by loosening the screw fixing of the right side receiver 28 of the main body. It is possible, and since it is detached from the upper surface of the main body, the water resistant sandpaper 8 attached to the rotating disk 6 on the upper surface of the main body can be easily replaced at the time of replacement.

Further, as will be described later with reference to FIG. 10, depending on the type of periodontal instrument, polishing without the arm member 18 may be more preferable.

With reference to FIGS. 3 and 4, the ring 32 fixed at an appropriate position on the arm member 18 leg includes a portion in which the arm member 18 extends laterally above the center of the rotating disk 6. It acts as a stopper to prevent sinking so that the distance from the rotating disk 6 is appropriate.

With reference to FIG. 6A, a through hole 34 having a diameter slightly larger than that of the rotating shaft 4 is provided at the center of the water resistant sandpaper 8 having a diameter slightly larger than that of the rotating disk 6. It serves as a guide hole and facilitates positioning when it is attached to the rotating disk 6. Further, referring to FIG. 6B, the adhesive double-sided tape 36 attached to the back surface of the water-resistant sandpaper 8 is provided with a bow-shaped protruding portion 38 as a part of the release paper, and this portion where the adhesive material is missing is removed. If the release paper is peeled off by pinching, the work of attaching to the rotating disk 6 becomes easy. Further, since the used water-resistant sandpaper 8 has a slightly larger diameter than the rotating disk 6, the re-covering work can be facilitated by pinching and peeling off the portion slightly protruding from the rotating disk 6.

The grain size of the water resistant sandpaper is as wide as 400 to 3000, coarse (400 to 600), medium (800), fine (1000 to 1200), and extra fine (3000), and the periodontal period. It is possible to handle various situations of the cutting edge of equipment, that is, if the cutting edge is chipped, deformed, etc., and the wear is large, coarse or medium-sized ones should be used to correct the shape of the cutting edge, and then fine or extra-fine ones should be used for finish polishing. If the sharpness is simply reduced, use fine or extra-fine ones from the beginning to minimize wear on the cutting edge of the instrument, and use the rotating disk speed adjustment function for delicate polishing. Is possible. However, this is a guideline, and the particle size of the water resistant sandpaper 8 may be selected according to the actual conditions such as the state of the equipment.

In addition, the shape of the cutting edge of a new instrument does not always meet the needs of the user, and customization such as narrowing the width or thinning the cutting edge of a curette or the like is sometimes necessary. This can be easily achieved by using the periodontal instrument polishing device of the present invention.

Frequent replacement of expensive grindstones is problematic in terms of both time and cost. Inexpensive water-resistant sandpaper can be easily replaced with new water-resistant sandpaper if the polished sand-coated surface is worn away and the polishing performance deteriorates, and high-precision polishing can be maintained.

With reference to FIG. 7, polishing of the curette 40, which is most commonly used in the treatment of periodontal disease, will be described as a first embodiment. The structure of the curette 40 is large and can be divided into three parts: a grip portion 42, a neck portion 44 (shank, hereinafter referred to as a shank), and a blade portion 46. The shank 44 is a connecting portion between the grip portion 42 and the blade portion 46, and its length and bending are devised so that it can easily reach the work portion.

The ones closest to the blade portion 46 are called the first shank 48, the second shank 50, and further the third shank 52. The morphology of the second shank 50 and the third shank 52 is extremely complicated depending on the part to be used, such as the anterior tooth part, the small molar tooth part, the molar tooth part, and the upper, lower, left and right parts. Since the structure in which the upper surface 54 of the blade portion 46 is tilted by about 20 degrees is common to all types, no matter how complicated the shape of the entire shank 44 is during polishing, the polished surface obtained by the rotation of the polishing sheet 10 and the first Considering only the angle of one shank 48, the angle of the polished surface of the side surface 56 of the blade slid on the polished surface is determined, that is, the angle of the cutting edge is determined.

With reference to FIG. 7 again, the blade portion 46 is composed of an upper surface 54, a side surface 56, and a back surface 58, has a substantially triangular cross section, and the line where the upper surface 54 and the side surface 56 intersect is called a cutting edge 60. Configure. If the cutting edge 60 becomes a sharp line, the cutting edge becomes sharp, and if the cutting edge 60 wears and the angle changes due to the work, it becomes rounded, and if it becomes a loose surface, the cutting edge becomes dull.
Further, an enlarged view of the cutting edge 60 when polished with coarse-grained water-resistant sandpaper 8 is a large sawtooth-shaped cutting edge 62 as shown in FIG. 8 (A), whereas it is fine as shown in FIG. 8 (B). When polished with water resistant sandpaper for the eyes, it becomes a small serrated incisal edge 64 for the eyes. If the tip of a large serrated edge is rounded, the sharpness is likely to decrease, and even if the tip of a small serrated edge is rounded, it is not easily affected and the sharpness is not easily reduced. This is the reason why fine-grained grindstones are generally used for finish polishing when sharpening blades.

With reference to FIGS. 7 and 9, in the curette blade 46, the upper surface 54 of the blade 46 is tilted about 20 degrees with respect to the first shank 48, and the central portion 68 of the blade 46 is inclined with respect to the upper surface 54. The side surface 56 of the blade is formed at about 70 degrees. It should be noted that the angle of the cutting edge is slightly different depending on the part of the blade. Generally, the angle between the upper surface 54 and the side surface 56 of the curette blade 46 is about 80 degrees at the base 66 as shown in FIG. 9 (A) and about 70 degrees at the central 68 as shown in FIG. 9 (B). As shown in FIG. 9C, the tip 70 is about 45 degrees and becomes thinner toward the tip, so to speak, the side surface 56 of the blade is not linear but curved in the longitudinal direction.

The angle formed by the polished surface obtained by rotating the polishing sheet 10 and the first shank 48 is changed to, for example, 30 degrees at the base 66 of the blade portion 46, 40 degrees at the central portion 68, and 65 degrees at the tip portion 70. By changing the angle, the angle formed by the upper surface 54 and the side surface 56, that is, the angle of the cutting edge can be finely adjusted to be 80 degrees, 70 degrees, and 45 degrees, respectively.

At this time, the use of the blade angle guide 20 is extremely effective. That is, as shown in FIGS. 9 (A), 9 (B), and 9 (C), with the notched slope 76 of the blade angle guide 20 forming an angle of 40 degrees with the polished surface as a fulcrum, in FIG. 9 (A). As shown, in the base 66 of the blade 46, the angle of the first shank 48 with respect to the polishing sheet 10 is set to 30 degrees with the upper edge 72 of the notched slope of the blade angle guide 20 as a fulcrum, and the central portion as shown in FIG. 9 (B). At 68, the angle of the cutting edge is changed to 40 degrees parallel to the notched slope 76, and at the tip 70, the angle of the cutting edge is changed to 65 degrees with the lower edge 74 of the notched slope as the fulcrum as shown in FIG. 9 (C). It is possible to polish the base portion 66 at 80 degrees, the central portion 68 at 70 degrees, and the tip portion 70 at 45 degrees.

At this time, by rotating the polishing sheet 10 from the cut edge 60 to the lower side of the side surface 56, that is, toward the back surface 58, polishing burrs are less likely to occur. Further, water polishing becomes possible by wetting the surface of the water resistant sandpaper 8 using the attached water supply device 26.

Polishing of a sickle-shaped scaler will be described as a second embodiment with reference to FIG. The blade portion 46 of the sickle-shaped scaler has a sickle-shaped side view and an acute-angled triangular cross section, and side surfaces 56 are formed on both sides at an angle of about 80 degrees with respect to the upper surface 54, and a cut edge 60 is formed. The blade portion 46 becomes thinner toward the tip, but is not linear but slightly curved.

Although it is difficult to polish a blade having such a shape by a conventional method whether it is a manual type or a mechanical type, if the periodontal instrument polishing device of the present invention is used, the side surface 56 of the blade can be attached to the polishing sheet 10. The cutting edge having the slightly curved side surface 56 can be easily and highly accurately polished by polishing while slightly rotating the shank around the shaft. At that time, as shown in FIG. 10B, the angle between the upper surface 54 and the side surface 56 of the blade of the sickle-shaped scaler is 80 degrees, and the angle formed by the polishing sheet 10 and the first shank 48 is about 10 degrees, so to speak, an instrument. It is necessary to lay it down considerably, and it may be better to perform polishing without using the blade angle guide 20. The water supply in this case is slightly applied to the surface of the water resistant sandpaper 8 by impregnating a brush of an appropriate size with water as described in the section of the mode for carrying out the invention, paragraph No. 0040. You may.

Other instruments such as tooth extraction elevators and surgical spoons can be polished safely, easily and with high precision.

By using the periodontal instrument polishing device of the present invention, in addition to fine small instruments and dental small instruments in various fields, for example, the tip of a small screwdriver, the tip of a cone, etc. can be safely and easily polished with high precision. It is possible.

2, main body 4, rotation shaft 6, rotation disk 8, water resistant sandpaper 10, polishing sheet 12, rotation speed adjustment knob 14, rotation direction changeover switch 16, grindstone 18, arm member 20, blade angle guide 22, plate-shaped frame 24, sponge brush 26, water supply device 28, right surface receiver 30, left surface receiver 32, ring 34, through hole 36, adhesive double-sided tape 38, release sandpaper bow-shaped protrusion 40, curette 42, grip portion 44 , Neck (shank)
46, blade 48, first shank 50, second shank 52, third shank 54, upper surface 56, side surface 58, back surface 60, cut edge 62, coarsely polished cut edge 64, extra fine polished cut edge 66, base 68, Central part 70, tip part 72, notched slope upper edge 74, notched slope lower edge 76, notched slope

Claims (9)

A rotary shaft 4 connected to a motor built in the main body 2 projects onto the upper surface of the main body to include a rotary disk 6 fixed to the rotary shaft 4, and can be freely attached to the rotary disk 6. The polishing sheet 10 is formed by attaching a circular water-resistant sandpaper 8 having substantially the same diameter, and the rotation is detachably screwed and fixed to the receivers 28 and 30 fixed to the left and right sides of the main body. The arm member 18 that crosses the central portion of the disk 6 is provided with a water supply device 26 that wets the surface of the water-resistant sandpaper with water, and a blade angle guide 20 that adjusts the angle of the cutting edge of the periodontal instrument to the polishing sheet 10. A periodontal instrument polishing device characterized by this. A polishing method using the periodontal instrument polishing device according to claim 1, wherein the blade of the periodontal instrument is polished using water-resistant sandpaper 8 attached to a motor-driven rotating disk 6. In the polishing sheet 10 made of rotating water-resistant sandpaper 8, the blade to be polished is pressed at the correct angle, and the periodontal instrument held with one or both hands in order to obtain a predetermined cutting edge angle. A polishing method characterized in that one shank 48 is polished while changing the cutting edge angle with the cutting edge angle guide 20 as a fulcrum. The polishing method using the periodontal instrument polishing device according to claim 1, wherein a sponge brush 24 containing water is press-fitted into a plate-shaped frame 22 constituting the water supply device 26, and the surface of the water-resistant sandpaper 8 is formed. A polishing method characterized by preventing a decrease in the hardness of the cutting edge of an instrument by supplying water to the surface of the water resistant sandpaper 8 by pressure contacting the sandpaper and performing so-called water polishing. The periodontal instrument polishing apparatus according to claim 1, wherein the rotating disk 6 has a speed adjusting function and a rotation direction reversing function. Regarding the receivers 28 and 30 fixed to the side surface of the main body for fixing the arm member 18, the receiver 30 on the left side surface is provided with a through hole from the upper surface to the lower surface, and the receiver 28 on the right side surface penetrates. The periodontal instrument polishing apparatus according to claim 1, wherein the front surface of the hole is opened to form a U-shaped groove. The thick wire-shaped arm member 18 having a circular cross section is U-shaped, crosses above the center of the rotating disk, and swivels around the hanging leg that is penetrated into the receiver 30 on the left side. One of the hanging legs is fitted into the U-shaped groove of the receiver 28 on the right side from the front and fixed by screwing, and the ring 32 that vertically positions the arm member 18 at an appropriate position of the leg. The periodontal instrument polishing apparatus according to claim 1, wherein the periodontal instrument polishing apparatus is fixed. A rectangular plate-shaped frame 22 is fixedly fixed to the left half from the center of the arm member 18, and a sponge brush 24 having a size slightly larger than the plate-shaped frame 22 is press-fitted to form the water supply device 26. The period according to claim 1, wherein a notched slope 76 provided on the front surface of the right half of the arm member 18 at an angle of 40 degrees with respect to the polishing sheet 10 serves as a blade angle guide 20. Tool polishing equipment. The water-resistant sandpaper 8 has a circular shape having substantially the same diameter as the rotating disk 6, and a through hole 34 having a diameter slightly larger than that of the rotating shaft 4 is provided in the center thereof, and the adhesive double-sided tape 36 is attached to the back surface. The periodontal instrument polishing apparatus according to claim 1, wherein the release paper is provided with a bow-shaped protruding portion 38. The first aspect of claim 1, wherein the water resistant sandpaper 8 has a particle size of 400 to 3000, a wide range from coarse to medium, and fine to ultrafine, and can be used for cutting edges in various situations. Periodontal instrument polishing device.

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