JPS59201765A - Dental metal-made polishing strip and manufacturing method thereof - Google Patents

Abstract

PURPOSE:To enable a polishing work from rough stage to finishing stage to be easily and securely performed only with an one time mounting operation by brazing abrasive grains for both rough polishing and fine polishing on the same surface or different surfaces divided into right and left, on a stainless steel-made substrate. CONSTITUTION:For rought polishing abrasive grains and successive fine polishing abrasive grains fixed on a substrate, a combination of particle diameters respectively ranging from 40 to 150mum and from 7 to 30mum is most suitable, and a hard particle having 7 or more in Mohs hardness is proper. As to a method for simultaneously fixing two kinds of polishing abrasive grains different from each other in the particle size on a metal substrate, an auxiliary frame having frame holes on both left and right sides is put on the metal substrate, each sort of pasty mixture yielded from metal wax powder and polishing abrasive grains by changing their mixing ratio according to the particle size of the polishing abrasive grains is forced to flow into the frame and homogenized by means of a vibrator and dried, and the frame is removed and heated by an electric furnace to melt the metal wax, allowing the polishing abrasive grains to be fixed on the substrate. A substance to be filled between adjoining surfaces of the teeth can be polished by said polishing strip from rough stage to finishing stage only with a one time operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes metal drawings (Uf J〆;), which are mainly used by dentists when polishing interproximal fillings of patients' teeth. It is divided into metal dental abrasive strips and synthetic resin dental abrasive strips, but when polishing interproximal fillings,
Depending on how the dentist handles the tooth, or the thickness and shape of the tooth-proximal filling, the abrasive grains may fall off, the abrasive grain fixing layer may be deformed, or the substrate may be deformed.

After polishing the interproximal filling, use the abrasive strip again.
7 + Perform sterilization. In order to clean the contaminants stuck between the abrasive grains, it may be necessary to submerge them in a cleaning liquid for a day or night, or to immerse them in a cleaning liquid for 10 minutes in an ultrasonic cleaner. After oscillating for ~20 seconds or completely removing contaminants from cuttings that may have adhered between the abrasive grains, the material was heated at 180°C for 1 hour in a dry heat oven to sterilize it. It was.

During this cleaning and sterilization process, the substrate in conventional dental abrasive strips may discolor, deform (7, or
While there are cases where the polishing abrasive grain adhesion layer is deformed and the polishing ability and operability of the tooth-proximal filling are compromised when reused, conventional dental polishing methods is for polishing (il
(Most of the grains have one type of particle size, which caused operational problems. In other words, when a dentist polishes a patient's interproximal tooth filling, they first need to use coarse polishing, which has an excellent polishing effect. Dental stool with abrasive grains R;'・S) l) Perform most of the rough polishing work in advance with a whelk. Next, the current state of fine polishing abrasive grains
Adjustment according to the surface condition of tooth V4 contact surface μl'M11 to select and polish the knob. A second polishing operation is performed to make the surface of the tooth-proximal filling smooth by iJT polishing. To this end, a coarse dental abrasive strip is first removed from a predetermined storage location and a coarse abrasive operation is performed on the patient within 11+r<1. Next, remove this item from inside the L]lr, return it to the designated storage location, then remove the tartar abrasive strip with fine abrasive grains and perform the same operation.'' - Grinding II-ζ Finish your work. Depending on the number of areas to be polished, this procedure must be repeated at least several times, which is cumbersome for the dentist and the patient.

From the above, the performance of the tartar abrasive strip used when polishing the tooth-proximal filling is as follows: 1) During the polishing process of the tooth-proximal filling, the polishing strip can be used for polishing the tooth-proximal filling.

Dropping of grains, deformation of the abrasive grain fixation layer or deformation of the substrate,
There should be no fear of discoloration.

2) After polishing the tooth-proximal filling, in order to clean and sterilize contaminants from cuttings stuck between the polishing abrasive grains, while using an ultrasonic cleaner or immersing the tooth in a cleaning solution, i. There is no risk of discoloration, deformation, or falling off of the substrate and abrasive grain fixation layer during heating in a dry heat sterilizer or dry heat sterilizer.

3) Once a tartar abrasive strip is taken out of storage, it is possible to complete the rough and final polishing operations in one operation without having to put it back. It is necessary to satisfy the factors. For this purpose (rJ, it is necessary to fix two types of polishing abrasive grains with different particle sizes on one metal substrate,
On a conventional metal substrate, coarse polishing abrasive grains and fine polishing abrasive grains are separated into left and right sides and fixed on the same surface (7 or 4111, respectively, using the wax imprinting method), or simply by bonding. Technically, the polishing abrasive grains were layer 1 because of the corrective agent.

The present inventors have worked diligently to create a metal dental abrasive strip that satisfies all of the conditions (1) to 3) above. We have discovered a method in which polishing abrasive grains with two different pushing forces (1) are divided into left and right parts and fixed to the same or each light beam by a waxing method, and this product has been created. The present invention relates to an abrasive strip and a method for producing the abrasive strip.The abrasive strip is coated on a substrate made of metal, particularly stainless steel. A full-pressure dental abrasive using polishing abrasive grains of ~60μ7+1 is applied to the left and right sides of the same surface, each with the same surface name, using the same method. When polishing interproximal tooth fillings, the polishing work can be easily and reliably performed from rough polishing to rough polishing in one loading operation [7]. At the same time, we succeeded in making the tooth contact surface filling mechanically and chemically stable against ω (a after abrasion), cleaning, and sterilization. As mentioned above, the polishing work for fillings requires sequential use of dental polishing strips, from dental polishing strips with coarse abrasive grains to i-dental polishing strips with fine abrasive grains, which is complicated. In contrast, when using the metal dental polishing strip according to the present invention, it is possible to complete the rough polishing and final polishing of the tooth proximal filling in one operation. Dropping of abrasive grains or deformation of the abrasive grain adhesion layer during cleaning with an ultrasonic cleaner, etc. after polishing an object, immersing it in a cleaning solution, or heating it in a dry heat sterilizer. However, the use of the metal dental abrasive strip of the present invention minimizes such risks and saves time and operation for dentists and patients. 1 burden
By reducing the number of offspring by one and being able to withstand mechanical and chemical treatments, it makes a great contribution to the hygiene of dentists and patients, and its effects are remarkable.

The details of the present invention are as follows.

The core of the present invention is to fix two types of polishing abrasive grains with different particle sizes to the same or different surfaces of a metal substrate, leaving an abrasive-free part between the left and right sides (7) and fixing them to the left and right sides. This method (grinding using the metal manufacturing method in which the coarse polishing abrasive grains obtained by tζ and the grains are fixed to if) During the polishing operation, most of the objectives can be achieved by performing the 11th polishing operation on the abrasive grain surface where the coarse polishing abrasive grains are present, but next, it is necessary to make this surface even more smooth. correction.

Yamashina J4'1 made of the same gold plate was used for finishing polishing work.
Coarse polishing of abrasive strips, abrasive grains ("I")
! l; l: A11 with fine abrasive grains on 7 sides
(By moving it toward the grain surface, it is possible to transfer the metal dental abrasive strip, which has a small internal cavity and is divided into left and right sides on the same surface, such as small children, etc.)
7/ In this case, if one end of the metal plate entering the oral cavity may damage the oral cavity or make it difficult for the dentist to operate, do not use this, but separate the metal plate into different sides on the left and right. Metal teeth f4.11] using a polishing strip fixed with
Rotate the abrasive grain surface of the same metal dental polishing knob on which the 11th thick abrasive grains are facing towards the opposite side where the fine abrasive grains are located. By using the full-flex dental abrasive strip with other dual-phase abrasives (IJ knobs), it is greatly possible to operate the same metal abrasive strip without having to replace it with the IJ knob. In this case, as already mentioned, the metal dental abrasive strip of the present invention exhibits superior abrasive work ability and durability compared to conventional dual-phase abrasive strips. Dental abrasive strips are not particularly limited to the type of metal as long as they have appropriate corrosion resistance to cleaning fluids used in dental clinics, etc.
Use an appropriate fixing method. Copper-based alloys (brass), nickel-based alloys, aluminum-based alloys, iron-based alloys, stainless steel-based alloys, etc. can be used, but under the conditions of dentist removal or intraoral conditions. Materials that can be used hygienically include:
Stainless steel type is preferable to 1% iron type.

Polishing tool for metal south and old use
C is usually intended for polishing the tooth surface 1-IJ and adjacent 1.11), ;,';-11sl. Therefore, when the adjacent one box is J +,, ′, insert it between the peaks and push it to the control tooth surface; The abrasive grains of Mokin+, i5-manufactured 1 and 1 strips are the size of one side of the metal substrate, or the left side of the front side and the right side of the back side (III" or (1) Attach it to the right side and the left side of the back side.
2mm to 5M+4 depending on the length of the crown of the E3 tooth part
limited to the range of 1. People's Grinding Knowledge 1. The length of the fixed surface of the old abrasive grains is 40 to 60 m when inserted into the interdental area and performs the polishing operation with reduced reciprocation [judged from n-works]
The length was limited to m. Furthermore, the thickness of the metal substrate requires appropriate strength, but the thickness is 1 to 1, and it becomes difficult to insert it into the interdental area.Q, 5 Z+rn, lν,
Limited to ding.

Metal dental abrasive according to the present invention 2, trifle kl, depth/diameter 1
．． 1. Two types of polishing abrasive grains are made of the same metal JHt.
-The metal 1 of the present invention is fixed to the plate.
q, 'i 1': The important part of the convenient polishing strip is σ[grinding with a length of 1 to 15 ml11 between the hard parts of large abrasive grains of different roughness 2·[ΦlI. The purpose is to leave a non-polishing abrasive grain portion where the abrasive grains do not stick. That is, the fixed layer of polishing abrasive grains is usually made of gold depending on the size of the ω1 abrasive grains and the thickness of the fixed layer.The thinner the substrate is, the easier it is to insert it between the teeth. It is used by inserting between the teeth from the non-abrasive abrasive part. When inserting, the lower side to be inserted differs depending on the state of the contact points between the teeth. If the insertion point is small, the length of the non-abrasive abrasive grain part can be inserted even by one length, so the minimum is one basket, and the width between adjacent teeth is large, and it can be inserted gradually by making some reciprocating movement when inserting. It is better to have a longer length of the abrasive grain part for non-polishing, so taking into consideration ease of operation, the upper limit was set at 15 yen.

As mentioned above, the metal abrasive strip of the present invention can be used for rough polishing of tooth-proximal fillings.
In order to achieve this goal, the selection of polishing abrasive grains is important; coarse polishing abrasive grains have a grain size of 40 to 150/Im, followed by fine polishing abrasive grains. It was confirmed that a combination of grains of 7 to 30μ7n was optimal. In other words, 1! with a grain size of 150 μm or more as abrasive grains for rough polishing. If you use '11 polishing abrasive grains, the polishing effect (l) will be excellent, but it will significantly damage the polished surface and create large scars that will be difficult to remove and repair in subsequent finishing polishing operations. If abrasive grains with a particle diameter of 4 Q It n+ or less are used, the polishing efficiency will drop to a point where the polishing process will take a long time. Fine, I+llllω■ It is better to use finer abrasive grains than L, but actual operability is related to the polishing efficiency in combination with coarse abrasive grains. Therefore 'r1.1. (Of IF≠I JTI (i!
(If you use abrasive grains with a particle size of 40 to 150 μm in the ladle, use fine abrasive grains with a particle size of 7 to 30 μm.
I think ilfH grains are the best. In other words, if you use abrasive grains with a diameter of 30/1 m or more for fine polishing, the surface will become slightly rougher than the final polished surface.
Finishing O
When using polishing abrasive grains with a size of 7'L or less, the deviation is θ[1
The yarn efficiency decreases by a factor of 1, the polishing work time becomes longer, and it becomes difficult to control the thickness of the polishing abrasive grain fixing layer.

The purpose of use of the metal dental abrasive strip of the present invention is to polish the proximal surface of the southern tusk directly as described in [7] above, and to
IJ) The abrasive grains are not particularly limited as long as they have a hardness that is necessary for polishing tooth proximal fillings with a Knoop hardness of 30 to 150 and tooth enamel with a Knoop hardness of around 34θ. That is, as long as the hard particles have a Mohs hardness of 7 or more, hard particles such as carborundum, alundum, diamond, carbide '4h+, and %M compound, which are usually easy to handle, are suitable.

The metal abrasive strip of the present invention (for painting) is produced by the wax 1l-I method. In this method, it consists of an upper plate and a lower plate, and an abrasive grain fixing layer for polishing is placed on the right or left side of the upper plate, or on both the left and right sides. A heat-resistant metal substrate is fixed to a ceramic auxiliary frame with frame holes, and a fine powder of low-melting metal wax such as silver wax is applied to the metal substrate in each hole for polishing. After pouring a mixture of abrasive grains into a paste with Frank's aqueous solution and homogenizing the mixture using a vibrator, it was dried at an appropriate temperature, and the auxiliary frame was heated under the setting sun. dissolve, ';, lil, 1) L
To fix the problem, place the abrasive grains on top of the metal substrate. 2 with different particle sizes (Ilihl's il)
After fixing the abrasive polishing "l" between the left side of the surface and fixing it, and fixing the abrasive grains, fix the sleeve J〆frame again. The part where the polishing abrasive grain fixed layer is placed on the right side or left side of the other side is covered over the auxiliary frame with heat insulation to prevent the silver wax from remelting. Since the color has been discolored by the super-flux, remove it by draining the boiling water. Although it is necessary to protect the wax from oxidation and rain, similar results can be obtained by replacing the atmosphere in the electric furnace with argon, nitrogen, etc. (<1 scum). A method of placing polishing abrasive grains of two types with different grain sizes on one metal board (2 substrates - A paste-like mixture in which the mixing ratio of metal solder powder and polishing abrasive grains was varied depending on the particle size of the polishing abrasive grains was layered on the substrate, and a paste-like mixture was applied to each frame in the same manner as [-1]. It is preferable to use spherical particles produced by the atomization method as the metal brazing powder used in the Ro-I-1 method.

The metal dental abrasive strip of the present invention will be explained below. Fig. 1 is a front cross-sectional view of an example of the present invention's drawing-making laboratory/strip before cutting, and in the figure, 1 is a metal substrate, and 2 is a metal plate fixed to the surface of this substrate by a wax coating method. Coarse polishing abrasive grains 6 are similarly fixed to the surface of the substrate opposite to Japanese polishing abrasive grains 2, and fine polishing abrasive grains 6 are firmly fixed by a fixing layer 4. FIG. 2 is a plan view of an example of the product of the present invention, FIG. 6 is a front sectional view after cutting, and FIG. 4 is a plan view of the same.

Next, an embodiment of the dental polishing string of the present invention will be described.

Examples 1 to 2 and Comparative Examples 1 to 5 were prepared as described below, subjected to the respective tests, and the results were summarized ((displayed).

Example 1 Length 130 m" + 'I'M 60" + Thickness o
1mm] Cocoon scrap board 7 is made of ceramic and the size of the hole is 65mm long. 1 cocoon is 55mm wide and 5Q+u+, 55mm wide.
The dragon is divided into left and right sides, fixed with an auxiliary frame whose central partition has a length of 15 cocoons, and first, carborundum abrasive grains with a grain size of 74 to 88 μn1 are coated with 60 to 70% of their weight in silver wax. Mix fine powder, make a paste in an aqueous flux solution, pour it into one of the auxiliary frames, and then reduce the particle size to 15 to 18 μm.
Carborundum of m (i + (sai Q Niso (Q ITi:
':, i;', f/) 40 to 50 silver wax fine powder was mixed and made into a paste in an aqueous flux solution, and poured into the other frame of the auxiliary frame. After making the distribution of the abrasive grains uniform using vibration, the material was dried in dry heat for 100" CI time. After that, the auxiliary frame was removed and the material was placed in an electric furnace 7b, and the inner glue was rapidly loosened by 5". After sufficiently replacing the surrounding air with argon gas, the temperature inside the furnace was increased to 45%.
After raising the temperature to 0℃ and completely melting the fine silver screw powder, it is cooled in a furnace and cooled to remove all of the abrasive grains.
A 11g 55 mm abrasive strip using metal drawing was prepared, leaving a non-abrasive abrasive grain part with a width of VCj S tntn at the center of the substrate, and after thoroughly washing it in d1z immersed water, it was phase-polished using a cutter. Cut into 971131 pieces of metal tartar abrasive F with a length of 60 mm for the abrasive grain part, a length of 45 mm for the abrasive grain part for fine polishing, and a width of 4 mm for both abrasive grain parts /C8 Example 2 Length 130 Ho 2 60m wide door, 0.011m thick stainless steel board made of ceramic, frame hole size is approximately 5Qmm long, width 55xx divided into left and right, medium heat partition length. Fix it with an auxiliary frame with a diameter of 1 Qmm, and first apply 5 of its weight to arantum abrasive grains with a grain size of 44 to 53 μm.
A fine powder of silver wax of 0 to 6 CJ56 was mixed and made into a paste in an aqueous flux solution, then poured into one frame of the υ frame, and then 60 to 60 of the weight of the powder was poured into one of the frames of the υ frame, and then 60 to 60 of the weight was applied to Alundum abrasive grains with a particle size of 9 to 12 μm. A mixture of 40% silver wax fine powder and paste in an aqueous flux solution was poured into the other frame of the auxiliary frame, and the distribution of the polishing abrasive grains was made uniform using the vibration of a vibrator. After that, heat it in a dry heat for 100' (
111. Let it dry for 1 hour. After that, remove the auxiliary frame in the evening)
1. Put it in an electric furnace and change the atmosphere inside the electric furnace.
After sufficiently purging with gas, the temperature inside the furnace was raised to 450 ''C for about 1 month, and after completely melting the fine wax powder, the furnace was cooled. to fix the
3. Leave a 10 inch wide non-abrasive grain part in the center of the board.
A high-use metal abrasive strip of 1'7455 mm was prepared, thoroughly washed in boiling water, and then cut into two pieces using a cutting machine. For ♂Kawagami) I.

Gold with a length of 45mm and a width of 4.5mm! , □Made by 3E, 1
′! 'Iri111 #) Cut into 11 wear rings [7
Ta.

Example 6 A stainless steel substrate with a length of 13Q+mm, a width of 60mm, and a thickness of Q, imm is made of ceramic.
Have 5 chickens divided on the left and right, and put 1 tithe on medium heat. / Fix the auxiliary frame with a length of J part of 111 m, and first
~149μm alundum abrasive grains':r! ,ffH
A mixture of 80~90% silver wax fine powder, made into a paste in an aqueous flux solution, was poured into one of the auxiliary frames, and then alumina abrasive grains with a diameter of 15~18 μm were added. Its weight: 11. Mix fine powder of 40 to 50 rivets and screws, make a paste in 1 solution of Franks water, pour it into the other frame of the auxiliary frame, and use the vibration of Pibray 17 to polish the abrasive grains. After making the distribution uniform, the material was dried in a dryer for 1 hour.Then, the auxiliary frame was removed and the material was placed in an electric furnace, and the atmosphere in the electric furnace was sufficiently replaced with argon gas. The temperature inside the furnace was raised to 450°C at a rate of 1 to completely melt the fine silver screw powder, and then cooled in the furnace to fix the alundum abrasive grains. A metal dental abrasive string with a width of 55+xm was prepared, leaving the grain part, and after washing thoroughly in boiling water, it was cut into pieces using a cutting machine to cut the abrasive grain part in length to 50 mm.
Length of fine polishing abrasive part: 60 Dragons: 7 Width of polishing abrasive part: 3
A gold FA dental abrasive strip of 17 mm was cut into 17 pieces.

Example 4 A stainless steel substrate with a length of 160 mm, a width of 60 mm, a thickness of o, and 0.05 mm was made of ceramic, and the size of the frame hole was divided into left and right sides with a length of 5Q+xm and a width of 55+ nm,
Fix the central partition with an auxiliary frame with a length of 5 mm,
First, a fine powder of 50 to 60 φ tack screws was mixed with alundum abrasive grains having a particle size of 44 to 56 μn, and the mixture was made into a paste in a Franks aqueous solution, and poured into one frame of the The vibration of the vibrator is used to uniformize the distribution of the abrasive grains (after 7 cycles, the particles are dried in a dryer for 10 minutes).
It was dried at 0°C for 1 hour. After that, remove the auxiliary frame, put it in an electric furnace, replace the atmosphere inside the electric furnace with argon gas, raise the temperature inside the furnace to 450℃, and completely melt the rivet and screw powder. , furnace cooling, and cooling to fix the alundum abrasive grains. After that, an auxiliary frame was fixed on the opposite side of the two polishing abrasive grains, and 60 to 40% of the weight of the fine powder of rivet screws was applied to the alundum abrasive grains with a grain size of 7 to 12 μm.・Pour the mixture into a paste in Frank's water diaphragm into the other auxiliary frame, use the vibration of the vibrator to uniformize the distribution of coarse abrasive grains, and then lower the temperature in the furnace. The temperature was raised to 450° C. to completely melt the silver screw powder. In this case, the part to which the polishing abrasive grains were initially fixed was isolated from the heat source using a heat insulating system to prevent it from melting again. Then, cool in the furnace.

A complete dental abrasive string of 55 mm was made by fixing the cooled rare random abrasive grains and having a 5 mm wide non-abrasive abrasive grain part in the center of the substrate17, and after thoroughly washing it in boiling water, it was cut. Using a machine, the metal drawing abrasive strips were cut into 20 strips with a coarse abrasive grain part length of 5Q mm, a fine abrasive abrasive grain part length of 60111111°, and an OF abrasive grain part width of 2.5 mm. . A front sectional view of the product of this example is shown in FIG. 5, and a plan view thereof is shown in FIG.

Comparative Example 1 Synthetic resin dental abrasive string, length 175mm
A commercially available product having a width of 3.9 mm and a thickness of 015 mm, the seed grains of the polishing abrasive grains were alundum abrasive grains, and most of the grain sizes were 7 to 90 μm was prepared.

Comparative Example 2 Metal dental abrasive strip, length 1 mm,
The width is 40 mm, the thickness is 0.08 mm, and the type of polishing abrasive grains are alundum abrasive grains, and most of the grain sizes of the polishing abrasive grains are 15 to 18 mm.
A commercially available product having a diameter of μm was prepared.

Test results The dental abrasive strips made of gold 1iJi and synthetic resin of the above examples and comparative examples were used for the following experiments.
The results are summarized in Tables 1, 2, and 6.

For the surface roughness test, a 5X5X10 block of the tooth-proximal filling was prepared, and using this as the machining advantage, for Examples 1 to 4, the order of phase polishing abrasive grains, followed by micro-polishing abrasive grains was applied. For Comparative Examples 1 and 2, the polishing work was performed independently for 30 seconds, and the surface roughness of the workpiece was measured using a surface roughness meter.
The results obtained are shown in Table 1.

Table 1 1'Lz... 10-point average roughness Deterioration test of the substrate and polishing abrasive grain fixing layer is used in the surface roughness test / This dental polishing tool is attached to the knob surface. This is to clean the cutting waste from the surface filling and sterilize it so that it can be used again.It is immersed in a cleaning solution at room temperature for 12 hours, then subjected to ultrasonic cleaning for 20 seconds in that state, and then soaked in distilled water. After cleaning and drying, the substrate was heated at 180° C. for 1 hour in a dry heat sterilizer, and each time the substrate and (Df abrasive grain fixed layer) were observed for changes in appearance or color using a stereoscopic microscope.

The results are shown in Table 2.

Measure 2 Table Sterilization - Heating in a dry heat sterilizer for 180" CI hours ○
No abnormality △ - Abnormal in some cases × Abnormal Comparative example 1~
2 respectively, making it easy to insert between the teeth.

We asked them to answer in 3 stages: normal and difficult, and also asked them to answer in 6 stages: easy, normal, and easy when transitioning from general polishing work to finishing polishing work. The monitoring results obtained are shown in Table 3.

Table 3 Table 1 shows the surface roughness test results, which are the combinations of polishing abrasive grains of Examples and Comparative Examples, and the measurement results of the surface roughness of the workpiece obtained by this combination.

Conventionally, when polishing interproximal tooth fillings, as mentioned in 7/ "The origin of coarse polishing abrasive grains", a number of dental polishing strips with coarse polishing strips and fine polishing abrasive grains are used. Different types are used immediately, but depending on the combination of abrasive grains, excellent polishing effects can be obtained by performing the polishing process at least twice.

Table 2 shows the results of deterioration tests due to differences in substrate material and abrasive particle fixation method. The most stable material is considered to be stainless steel.

Table 3 shows that a non-abrasive abrasive part is provided in the center of the board↓
These are the results of monitoring the transition time and operability when transitioning from abrasive work for insertion between teeth to abrasive work. Compared to the comparative example, it feels very easy to insert between the teeth, and the transition time is about 1. It has been shortened to 〉,,).

As is clear from the above results, the Yama 4-1 river polishing strike IJ pump of the present invention is safe for old dental clinics, is economical, can be used for a month, and can shorten the intercostal space during polishing work by 81 times. This is an abrasive strip for use.

[Brief explanation of drawings]

Fig. 1 is a front cross-sectional view of a metal south-grid coarse polishing slab l-'J according to the present invention, Fig. 2 is a soil surface 1-1 of the product of the present invention, and Fig. 3 is a cross-sectional view of the product of the present invention after cutting. 4 is a plan view of the product of the present invention after cutting; FIG. 5 is a front sectional view of the product of the present invention after cutting when polishing abrasive grains are fixed to the artificial light surface;
21 &d, are they very different? A top view of the product of the present invention after cutting is shown in which the abrasive grains for 1-1 kneading are fixed (7).

Claims (1)

[Claims] 1) Examples of front and back surfaces of a metal substrate having a width of 2 to 5 mm.
On the right side of the top surface and on the left side of the back side, two rows of abrasive grains with different particle sizes are placed, one of which has a grain size of 40 to 150 μm, and the other grain of which has a grain size of 7 to 60 μm. Metal dental abrasives having a thickness of 40 to 60 mm and a thickness of Q, 5 mm or less, with a length of 1 to 15 mm in the middle part, leaving a part that does not have any abrasive grains. strip. 2) A polishing strip for metal teeth according to claim 1, wherein the polishing abrasive grains are hard abrasive particles having a Mohs hardness of 7 or more. 6) A heat-resistant powder or fine powder consisting of an upper plate and a lower plate, with one hole provided on either the left or right side of the upper plate, and phase 1 abrasive grains with most of the particle sizes ranging from 40 to 15,074″. and finish polishing abrasive grains with most of the grain sizes of 7 to 30 μm, and a mixture of metal wax and abrasive grains with a diagonal diameter are mixed with a Franks aqueous solution to form a paste l. Pour it on the left and right sides of either side, or on the right side or left side of the front side and the left side or right side of the back side, at intervals of 1 to 15 mm, pie-break it, mix it evenly, and then dry it,
Next, remove the auxiliary frame and heat it in an electric furnace to give it a gold price of 7%.
1. A method for producing metal dental abrasive strips using the wax method, which comprises melting wax, subsequently cooling it, and then cutting it into predetermined dimensions.