JPH07124180A - Method for printing denture or dental plate - Google Patents

Abstract

PURPOSE:To easily and surely print the denture or dental plate without particular coloration by irradiating the denture or dental plate with a laser, then printing the denture or dental plate. CONSTITUTION:The denture is easily detached and the information is rapidly obtd. even if a sick and wounded person loses consciousness if the plate mucous membrane surface of the complete denture or partial denture is printed with the items necessary for first aid. The denture or dental plate is printed by irradiating the same with the laser on consideration for such requirement. A YAG laser, carbon dioxide laser, semiconductor laser, etc., are usable for the laser. Above all, the lasers of >=1W and generally about 10W output are optimum. The denture or dental plate printed by irradiating the denture or dental plate with the laser is colorable by dyestuff. Edible dyestuff, etc., having high safety in hygiene are used as the dyestuff.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for printing on a denture or a denture base using a laser.

[0002]

2. Description of the Related Art In Japan, in 2020, there were 31.88 million elderly people over the age of 65, accounting for about 23.6% of the total population, and one in four people was 65.
Expected to be older than age. Moreover, as the number of elderly families increases, the proportion of “one-person living alone” and “households with only an elderly couple” in the elderly population is projected to increase. On the other hand, in recent years, the number of accidents involving the elderly has increased, and the name of the person concerned is often unknown at the emergency site. In such cases, the denture wear rate of the elderly is increasing year by year, so when an ambulance crew or local volunteers observe the condition of the symptom and take first-aid measures, they should always look inside the oral cavity. ing.

Therefore, if the necessary information for emergency is printed on the floor mucosal surface of the full denture or the local denture, even if the victim becomes unconscious, the denture can be easily removed and information can be obtained quickly. Although it is possible, the current situation is that no such treatment is actually taken.

Therefore, the present inventor, as described in JP-A-4-44752, provides a denture or a denture base with a coloring agent containing at least a pigment, irradiates a laser and, if necessary, does not need to do so. We proposed a printing method characterized by removing various colorants. However, since the laser used here has a low output, it was used for fixing the colorant.

[0005]

DISCLOSURE OF THE INVENTION As a result of intensive studies, the present inventor has found that it is possible to print on a denture or a denture base by using a laser of relatively small size and high output without particular coloring. Heading out, the present invention was reached. Also, the laser
They also found that they can be colored after printing.

[0006]

The present invention provides a printing method for printing by irradiating a denture or a denture base with a laser.

As the laser, a YAG laser, a carbon dioxide laser, a semiconductor laser or the like can be used. Among them, an output of 1 W or more, generally about 10 W is most suitable. Such a laser can perform clear printing on a wide range of objects such as plastics, ceramics, organic materials and plated metal materials. Further, since there is no physical contact between the marking head and the marking object, even a curved object can be marked without damaging it due to mechanical stress. -King is possible.

Further, since recent lasers are provided with a marking image and operating software capable of completely controlling the marking conditions, not only characters but also bar codes are displayed.
Marks and patterns can be easily marked. Laser irradiation can be performed in units of seconds. In particular, the marking depth can be adjusted by changing the laser irradiation time and adjusting the output, and the laser irradiation time can be changed depending on the object and the location.

The denture or denture base printed by irradiating a laser can be colored with a dye. As the dye, a food dye having high safety and health is used. The dye may be used alone or in combination with a binder resin, a solvent and an additive. Note that the binder
As for the resin and the additive, it is preferable to use those having high safety similarly to the dye.

As the edible dye, synthetic tar dyes and aluminum lakes thereof, inorganic pigments, natural dyes, squid ink, and haguro are used. It should be noted that only the use standard is set for natural pigments, and the component standard and the use standard are set for others, so it is necessary to use them in conformity with these standards. In particular, synthetic tar dyes and their aluminum lakes cannot be used as food dyes unless they have passed the national and prefectural product inspections.
Be careful.

Although these food dyes can be used as they are, they may be dispersed in a resin if necessary. The method of dispersing the dye is not particularly limited, but it is the easiest and easiest to disperse it by a sand mill. As the resin, a natural resin and a synthetic resin can be used, but a natural resin is preferable. Cellulose is a natural resin.
And derivatives thereof, chitosan, sodium alginate, polysaccharides such as starch, and polyamines.

The synthetic resin is preferably polymethylmethacrylate used for the denture base or denture, ceramic, or a resin containing an acrylic ester, which has good adhesiveness to metal. The resin containing an acrylic ester can be obtained by copolymerizing a monomer containing an α, β-unsaturated double bond in the presence of a radical initiator. Examples of the monomer containing an α, β-unsaturated double bond include an alkyl methacrylic ester having 1 to 22 carbon atoms and an alkyl acrylic ester having 1 to 22 carbon atoms.

As long as it is not deteriorated by oral saliva and does not change even when immersed in an aqueous solution of a denture cleansing agent, a (meth) acrylic ester having a hydroxyl group or a (meth) acrylic ester having a carboxyl group is used as needed. Alternatively, it is also possible to copolymerize a (meth) acrylic ester having nitrogen. Further, a graft or block copolymer of an acrylic resin and an epoxy resin can be used as well.

[0014]

The present invention will be described in more detail based on the following examples. In addition, a part represents a weight part in an Example.

Example 1 Carbon dioxide laser with an output of 10 W
Was printed on the denture. The marking field
The marking was 5 mm × 10 mm, the marking line width was 0.3 mm, the depth was 200 μm, and the required time was 2 seconds. When the marked denture was immersed in a commercially available denture cleanser for 3 days, no change was observed and clear marking was obtained.

[Embodiment 2] Carbon dioxide laser with an output of 5 W
Was used to print on the denture base. The marking field was 5 mm × 5 mm, the marking line width was 0.2 mm, the depth was 100 μm, and the required time was 1 second. Next, squid ink 10
Part, hydroxypropyl cellulose and 10 parts of ion-exchanged water were dispersed in a sand mill, and the resulting ink was applied onto a marked denture to color letters. The extra colored portion was wiped off with a cloth moistened with water, and then dried at room temperature for 24 hours. When the marked denture was immersed in a commercially available denture cleanser for 3 days, no change was observed and clear marking was obtained.

[Embodiment 3] Carbon dioxide laser with an output of 10 W
The bar code was printed on the denture by using. Marking field is 10mm x 20mm, marking line width is 0.2mm, depth
At 100 microns, the required time was 4 seconds. Then, an ink prepared by dispersing 10 parts of squid ink, 10 parts of hydroxypropyl cellulose and 100 parts of ion-exchanged water in a sand mill was applied on a marked denture to color characters. Wipe off the excessively colored parts with a cloth dampened with water and leave at room temperature for 24 hours.
After hours dried. When the marked denture was immersed in a commercially available denture cleanser for 3 days, no change was observed and clear marking was obtained.

[0018]

According to the present invention, it is possible to quickly and easily perform cleaning-resistant marking on a denture or denture base. The marking can be colored as required and can be printed on a bar code, so that it is very useful industrially such that information can be quickly obtained in the case of an unexpected accident.

Claims (3)

[Claims] 1. A printing method comprising irradiating a denture or a denture base with a laser for printing. 2. A printing method comprising coloring a denture or a denture base printed by laser irradiation with a dye. 3. The printing method according to claim 1, wherein the printing by laser irradiation is a bar code.