JPS63292961A - Apparatus for sterilizing dental impression - Google Patents

Abstract

PURPOSE:To enhance the certainty of the disinfection and sterilization of a dental impression and a dental impression material, by allowing the outlet of an ozonizer and the inlet of an ozone killer to communicate with a sterilizing chamber having a freely openable and closable hermetically closed structure having the metal net tray receiving the dental impression and dental impression material mounted therein. CONSTITUTION:The outlet 2a of an ozonizer 2 is allowed to communicate with a sterilizing chamber 1 having a hermetically closed structure, in which a metal net tray 14 receiving a dental impression and a dental impression material is mounted, through a valve 3a and the inlet 5a of an ozone killer 5 is allowed to communicate with the sterilizing chamber 1 through a valve 6. An ozonized gas is sent to the inlet 5a of the ozone killer 5 through the valve 6 to be decomposed by heating or a catalyst or adsorbed by an adsorbent and an ozone monitor 15 confirms that the concn. of ozone becomes a safe state to discharge ozonized gas to the open air through a valve 16. Next, when a pump 17 is operated, the ozone gas in the sterilizing chamber 1 passes through a valve 3b to be sent into the ozonizer 2 from an inlet 2b and again receives ozonizing action herein to issue from the outlet 2a thereof to be recirculated to the sterilizing chamber 1 through the valve 3a.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to the impression formed by pressing an impression material such as clay-like soft synthetic rubber onto the patient's teeth when a dentist takes a mold of the patient's teeth. 2. Description of the Prior Art Regarding Apparatus for Disinfecting and Sterilizing Impression Materials Conventionally, impressions and impression materials are generally disinfected and sterilized by heating.

The heating may cause the impression to become soft and lose its shape, or may damage the material of the impression material. Therefore, disinfection and sterilization cannot be carried out reliably, which may cause various problems.

In order to reduce this problem, it is preferable to use highly concentrated ozone gas, but in this case, the equipment for generating ozone gas is 1 m long, so the ozonizer is generally large in size, and its power supply is also expensive, especially when the ozone gas is used. Considering the effects on the human body caused by ozone leaking into the outside air, it is not possible to increase the concentration of ozone gas to effectively disinfect and sterilize it, so there is a limit to its reliability.

Problems to be Solved by the Invention The present invention solves the above-mentioned problems when performing disinfection and sterilization using heat and high-concentration ozone gas, namely, the problem of the material of the tooth mold and impression material due to the heat of the dental impression to be disinfected and sterilized. The purpose is to improve the reliability of disinfection and sterilization compared to conventional methods by eliminating various risks caused by damage and leakage of ozone gas.

Another purpose is to increase the generation efficiency of the ozonizer and make the ozonizer compact.Another purpose is to make the ozone gas more effective and effective at disinfecting and sterilizing.

Means for Solving the Problems This invention provides ozone gas production by connecting the outlet of an ozonizer to a sealable sterilization chamber containing a built-in tray, and communicating an ozone removal device (hereinafter referred to as Ozone 2) to the sterilization chamber. This is a method for disinfecting and sterilizing tooth impressions. In this case, it is preferable that the tray has an air-permeable structure such as a perforated wire mesh plate, and the material thereof is made of a material having sufficient resistance to high concentration ozone, such as stainless steel or Teflon, and it is preferable that the tray is extractable.

It should be noted that the ozonizer is embedded in a fine ceramic dielectric with a planar dielectric, a linear corona discharge electrode provided on the inner surface of the dielectric, a high-frequency high-voltage power supply connected between the two electrodes, and a high-frequency high-voltage power source formed inside the dielectric. It may also be constructed with a bath surface infestation generation area.

Operation: The ozone gas generated by the ozonizer is supplied from its outlet into a disinfection and sterilization chamber that can be opened and closed for airtight self-filling through the tray, and it adheres to the dental impressions and impression materials, etc. that have been stored in the tray in advance. Bacteria, etc.; C: Ozone gas is applied.

This is disinfected and sterilized, and the ozone gas after use is sent to the inlet of the oshi/kira, where it is removed to ensure that it does not affect the human body, and this is confirmed with an ozone gas monitor before being discharged into the outside air. It is something.

Furthermore, the ozonizer may be of any type,
In particular, the ozone gas supplied from the outlet of the ozonizer is used to transfer the oxygen gas or oxygen in the air introduced into the creeping discharge generating area inside the fine ceramic dielectric of the ozonizer to the linear corona discharge electrode and the fine ceramic dielectric. It is preferable to use one that gasifies ozone by the action of creeping discharge generated by a high-frequency, high-voltage power source connected between planar induction electrodes embedded in the wafer.

Embodiment An embodiment of this invention will be described with reference to the accompanying drawings.
As shown in the figure, the outlet 2a of the sterilization chamber IK ozonizer 2, which has a sealed structure with a built-in wire mesh tray 14, is connected to the pulp 3a.
Along with communicating through.

The inlet 5a of the sterilization chamber IK ozone killer 5 is communicated with the pulp 6, and the ozonizer is constructed as shown in Figures 3 and 4 as follows.

A planar induction electrode 8 is embedded within the thickness of a fine safe dielectric material 7 made of high-purity alumina porcelain, etc., and the dielectric material 7
A plurality of linear corona discharge electrodes 9 are provided in parallel on the inner surface of the dielectric body 7, a high frequency high voltage power source 10 is connected between the two electrodes 8 and 9, and the linear corona discharge electrode 9 is looped inside the dielectric body 7. A creeping discharge generation area 11 is formed near the dielectric body 7, and a cooling device such as a cooling fin is provided outside the dielectric body 7 as required.

The sterilization chamber 1 also has a door 2 that can be opened and closed freely, and the inside thereof is equipped with a dental impression device and impression material (as shown in Figure 2).
The tray 5 is designed so that a plurality of stainless steel wire mesh trays 14 having ears for accommodating containers (not shown) can be retractably accommodated.

From the inlet 2b of the ozonizer 20, oxygen, which is a raw material gas, or air, or an oxygen enrichment device is used to increase the oxygen concentration and supply air into the ozonizer, and the high-frequency and high-voltage power supply 10 is used to supply the linear corona discharge electrode 9 and the planar induction electrode 8. A high frequency and high voltage is applied across the line to generate a creeping discharge near the linear corona discharge electrode 9, which acts on the oxygen, air, etc. to turn it into ozonized gas.

Now, in Figure 1, the high frequency high voltage power supply 10 is switched on to operate the ozonizer 2, and the pulp 6.16,1 is turned on.
Open 8o and 3a, close pulp 3b and 4a (
Then, air 21 enters the activated carbon tank 19 from the outside, and the air 21
After ammonia and sulfur dioxide gas, which are trace interfering substances, are removed, the ozone is sent to the ozonizer 2 via the dehumidifier J and the pulp 18, where it is converted into ozone gas by the above action, increases its sterilizing power, and passes through the pulp 3a. It is sent to the sterilization chamber 1.

The ozonized gas is sent from the sterilization chamber 1 through the pulp 6 to the inlet 5a of the ozone killer 5, and the ozone concentration is reduced to a predetermined value of 1, for example 0, by destruction of the ozone gas by heating, decomposition by a catalyst, adsorption by an adsorbent, etc. .Ozone monitor 15 confirms that it is below 1 ppm and safe! It is then discharged to the outside air through the pulp 16.

Next, the pulps 3a and 3b are opened, the pulps 18 and 6 are closed, and the bonder 17 is activated to form a circulation path between the sterilization chamber 1 and the ozonizer 2 via the pulps aa and ab. ozone gas.

It passes through the pulp 3b and is sent into the ozonizer 2 from the ozonizer inlet 2b, where it is again subjected to ozone gasification.
It exits from the outlet 2a and circulates into the sterilization chamber 1 via the pulp 3a. When repeating this, the ozone gas concentration in the sterilization chamber 1 can be increased to about 10,000 to 30,000 PPM to strengthen the sterilization and disinfection effect.

Also, at this time, since the tray in the sterilization chamber 1 is a wire mesh tray 14, the contact area between the dental impression and impression material housed inside the wire mesh tray 14 and the ozone gas is much greater than when using a dish-shaped tray. , and the sterilizing and disinfecting effect can be further enhanced.

In some cases, after the circulation operation is completed, the pulp 4a is opened, the pulp 3b is closed, and the circulation bonder 13 is activated to pass the ozonized gas generated in the above manner through the pulp 4a1 between the sterilization chamber 1 and the humidifier 4. It is also possible to further increase the disinfecting power by circulating and humidifying the ozonated gas.

Note that at this time, the ozonizer 2 may be stopped and the humidification operation described above may be performed.

The above operations sterilize and disinfect bacteria adhering to the dental impression and impression material previously stored in the sterilization chamber 1. When the sterilization is completed, the supply voltage to the ozonizer 2 is turned off to stop its operation, and the pulps 3b and 4a are closed to produce the pulp 6.3a.

16.Open 18, ozonizer 2. The ozonized gas in the sterilization chamber 1 is replaced with ozone-free air or oxygen, etc., and then released to the outside through the ozone gas monitor 15, and then the door of the sterilization chamber 1 is opened and the required tooth mold is removed. pull out the wire mesh tray 14 containing the impression device and impression material,
This completely prevents the ozonized gas toxic to the human body from flowing out through the door from the sterilizer N1.

In this case, close 3b, 4a, 16, 18 and open Akp 3a.
.

6 is opened, the bonder 17 is operated, and the highly concentrated ozonized gas in the sterilization chamber 1 is transferred to the ozone killer 5, ozone monitor 15, pump 17. The ozone is circulated through the ozonizer 2 which is in a stopped state, the ozone is removed by the ozone killer 5, and after confirming with the ozone gas monitor 15 that the ozone concentration has reached a completely safe level, the pump 17 is stopped. The door of the sterilization chamber 1 may be opened by pulling out the wire mesh tray 14.

Also, when using air as the raw material gas, an ozonizer 20
The inlet 2b has a pump 17. An activated carbon tank 19 for sequentially adsorbing and removing SO1, ammonia, etc. through the air supply pulp 18. By operating the pump 17 since a dehumidifying Masuda made of Molecu 2 Sieg or silica gel is connected.

The air 21 sucked into the pump 17 is sequentially dehumidified and SO
After removing 8 and ammonia, the ozone is supplied to the ozonizer 2 via the supply pulp 18 and the pump 17 to generate highly concentrated ozone.

In this case, instead of the air 21, it is also possible to use pure oxygen contained in the oxygen cylinder 22, or a gas whose oxygen concentration has been increased in the air using a suitable oxygen enrichment device.

When using an oxygen cylinder, the supply pulp 18 is switched to the oxygen cylinder n through a three-way valve.

Furthermore, a cooling device of cooling fins 12 formed on the outside of the fine ceramic dielectric 7 constituting the ozonizer 2 cools the heat generated during the creeping discharge of the ozonizer 2, increases the efficiency of ozone gas generation, and once the ozone gas is generated, This prevents ozone gas from returning to oxygen through thermal decomposition.

In this case, a water cooling jacket may be provided on the outside of the cylindrical fine ceramic dielectric material 7 for cooling, or an electronic cooling element may be provided on the outside of the dielectric material 7 for cooling.

If dental impressions or impression materials that have been sterilized using this device are used in the patient's oral cavity, there is a risk of damaging the gums due to strong oxidation.

Therefore, it is important to remove ozone by immersing them in an alkaline solution such as sodium bicarbonate to neutralize the high concentration of ozone, or by wiping them with gauze soaked in the same alkaline solution. effect of
-This invention has the above-mentioned configuration,
In particular, the ozone gas concentration in the sterilization chamber can be significantly increased by incorporating a wire mesh tray containing dental impressions and impression materials, and communicating the outlet of the ozonizer and the inlet of the ozone killer to the sterilization chamber, which has a sealed structure that can be opened and closed. At the same time, the contact area between the dental impression and impression material housed in the wire mesh tray and the ozone gas is also increased compared to before.

It is possible to further enhance the disinfection and sterilization effect, thereby increasing the certainty of disinfection and sterilization.

In addition, by constructing the ozonizer with a creeping discharge generation area formed between a planar induction electrode and a linear corona discharge electrode inside a ceramic dielectric, both electrodes, and a high-frequency, high-voltage power supply, ozone generation efficiency can be improved. The ozonizer is significantly improved, and along with the increase in the ozone gas concentration, it is possible to efficiently sterilize bacteria attached to tooth impressions and impression materials, and the ozonizer is smaller, reducing the space occupied by the entire sterilization device. can do.

[Brief explanation of the drawing]

Figure 1 shows an outline of the configuration of the disinfection and sterilization device of the present invention. Figure 2 is a perspective view of a wire mesh tray containing dental impression material. ? What is the 3rd figure? An enlarged vertical cross-sectional view of the main parts of the ozonizer in Figure 1, ',? 4
The figure is a sectional view taken along the line 11-1 in Figure 3. l... Sterilization chamber 2... Ozonizer 4... Humidifier 5... Ozone killer 7... Fine ceramic dielectric 8... Planar induction electrode 9... Linear corona discharge electrode 10 ... High frequency high voltage power supply 11 ... Creeping discharge generation area 14 ... Wire mesh tray 15 ... Ozone gas monitor 19 ... Activated carbon tank ... Dehumidifier

Claims (1)

[Scope of Claims] 1. A sterilization device for dental impressions, characterized in that an outlet of an ozonizer and an inlet of an ozone killer are communicated with a sterilization chamber that has a built-in tray and is closed and can be opened and closed. 2. The dental impression sterilization device according to claim 1, wherein the tray is made of a material having air permeability. 3. The dental impression sterilization device according to claim 1 or 2, wherein the tray is composed of a wire mesh or a perforated plate. 4. The ozonizer consists of a planar induction electrode embedded in a fine ceramic dielectric, a linear corona discharge electrode provided on the inner surface of the dielectric, a high-frequency high-voltage power source connected between the two electrodes, and the inside of the dielectric. 2. The dental impression sterilization device according to claim 1, further comprising: a creeping discharge generation area formed in a sterilizing device for a tooth impression. 5. The dental impression sterilization device according to any one of claims 1 to 3, characterized in that the tray is supported so as to be extractable. 6. The dental impression sterilization device according to claim 4, wherein the dielectric constituting the ozonizer has a cylindrical shape and is provided with a cooling device on its outer surface. 7. The dental impression sterilization device according to claim 1 or 4, wherein the ozone killer is connected to an ozone gas monitor downstream thereof. 8. The dental impression sterilization device according to claim 1 or 4, wherein the inlet of the ozonizer is connected in series with a pump, a dehumidifier, and an activated carbon tank. 9. The dental impression sterilization device according to claim 1 or 4, characterized in that the inlet of the ozonizer is communicated with a sterilization chamber via a pump. 10. The dental impression sterilization device according to claim 1, wherein the outlet of the ozone killer is communicated with a sterilization chamber via a pump.