JP2894472B2 - Root canal cleanser - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel paste-type chemical canalizing agent for root canal containing sodium hypochlorite as a main component and used in the dental field.

[0002]

2. Description of the Related Art In dental treatment, cleaning and enlargement of a root canal using an organic dissolving agent for chemically dissolving and removing residual dental pulp and necrotic putrefactive substances in the root canal are performed.
Such organic solubilizers are referred to as root canal cleansers. Currently used root canal enlargement agents include a 3-10% by weight sodium hypochlorite solution, an EDTA preparation, a phenolsulfonic acid preparation and the like.
Sodium hypochlorite solutions of 10 to 10% by weight are widely used.

[0003]

However, in the case of a liquid root canal cleaning diluent such as a sodium hypochlorite solution, it is inconvenient to fill the root canal with a liquid. Drained fluid may drain from the root canal into the mouth during treatment, causing discomfort to the patient. An object of the present invention is to solve the problem of such a root canal enlargement agent.

[0004]

Means for Solving the Problems In order to achieve the above object, the present inventors have studied to make the sodium hypochlorite solution viscous and to use it as a paste-type root canal cleaning agent. However, sodium hypochlorite is strongly alkaline, and does not easily form a gel or paste with an organic thickener as usually used. Then, as a result of further study, it was found that the use of inorganic montmorillonite could provide a paste-type preparation suitable for expanding and cleaning the root canal, and completed the present invention.

[0005] That is, the present invention provides a paste-type new root canal enlargement agent comprising sodium hypochlorite and montmorillonite. Also,
The present invention also provides a process for producing a root canal enlargement agent, characterized in that montmorillonite swollen with water or a buffer is mixed with sodium hypochlorite to obtain a paste type.

[0006] The sodium hypochlorite to be used may be one used for a conventional root canal cleaning diluent.
Although not particularly limited, it is usually 3 to 10% by weight, preferably 6 to 10% by weight based on the total amount of the root canal cleaning diluent.
% By weight.

Montmorillonite (hydrated aluminum silicate)
May be any commercially available one, and the compounding amount is not particularly limited, but is usually 3 to 10% by weight, preferably 4 to 10% by weight based on the total amount of the root canal cleaning magnifier.
6% by weight.

The root canal enlargement agent of the present invention can be produced, for example, by mixing montmorillonite swollen with water or a buffer and sodium hypochlorite by a method known per se. Buffers used for swelling of montmorillonite include a buffer consisting of disodium phosphate / sodium hydroxide, a buffer consisting of glycine / sodium chloride / sodium hydroxide, a buffer consisting of borax / sodium hydroxide, hydrochloric acid / carbonic acid A buffer having a pH of 10 to 14, such as a buffer composed of sodium, a buffer composed of sodium carbonate and sodium hydrogen carbonate, and the like.

The root canal enlargement agent of the present invention can be used in the same manner as a conventional liquid agent. That is, the paste-type preparation using the montmorillonite of the present invention is not a mere gel or paste, but a thixotropic preparation. There is a property of returning to. For this reason, the same effect as the liquid agent is maintained in the cleaning effect in the root canal.

[0010]

Next, the present invention will be described in more detail by way of examples. In the examples, “parts” means parts by weight. Example 1 90 parts of water or buffer was added to 4 parts of montmorillonite to swell, and then accurately weighed sodium hypochlorite 6
Was added and stirred to obtain a paste-type root canal enlarger having a total amount of 100 parts.

Example 2 After 10 parts of montmorillonite was swelled by adding 80 parts of water or a buffer solution, 10 parts of sodium chlorite accurately weighed was added, and the mixture was stirred to make the total amount 100 parts. A tube cleaning extender was obtained.

Example 3 After 5 parts of montmorillonite was swelled by adding 92 parts of water or a buffer, sodium chlorite 3 weighed accurately was weighed.
Was added and stirred to obtain a paste-type root canal enlarger having a total amount of 100 parts.

Example 4 After swelling 7 parts of montmorillonite with 85 parts of water or a buffer solution, 8 parts of sodium hypochlorite accurately weighed were added, and the mixture was stirred to make the total amount 100 parts. A tube cleaning extender was obtained.

Example 5 89 parts of water or a buffer solution was added to 5 parts of montmorillonite to swell, and then accurately weighed sodium hypochlorite 6
Was added and stirred to obtain a paste-type root canal enlarger having a total amount of 100 parts.

Example 6 After swelling 10 parts of montmorillonite with 84 parts of water or a buffer solution, 6 parts of sodium hypochlorite accurately weighed were added, and the mixture was stirred to make the total amount 100 parts. A tube cleaning extender was obtained.

Table 1 shows the results of a comparison of the clinical feeling of use between a commercially available 10% by weight sodium hypochlorite solution and the preparation of the present invention.

[0017]

[Table 1]

As shown in Table 1, the preparation of the present invention has viscosity and lubricity, is easier to fill the root canal, is easier to use, and has no residual feeling as compared with a liquid preparation. In addition, the state of foaming due to mixing with hydrogen peroxide solution was examined, and the cleaning effect by foaming was examined. Table 2 shows the results.

[0019]

[Table 2]

As shown in Table 2, the preparation of the present invention has a small foam and a long foaming time, so that the cleaning effect is further improved.

[0021]

The preparation of the present invention has the following advantages as compared with the conventional liquid sodium hypochlorite. (1) Attached to the tip of a file or the like, or filled into a syringe, and can be easily carried into the root canal. (2) The preparation carried into the root canal does not easily flow out of the root canal during treatment. (3) There is a lubricating action in the root canal, which facilitates the treatment operation. (4) Dental cuttings are included in the preparation and are easily transported out of the root canal. (5) It reduces irritation to the apical periodontal tissue. (6) The root canal can be cleaned by alternately using 3% hydrogen peroxide and the foaming action of the two reactions, but since the foaming occurs gently and gradually, the contents of the root canal can be washed out of the root canal. Emissions are assured.

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yamamoto ▲ Hiro ▼ Next 4-7-25 Nakazakurazuka, Toyonaka-shi, Osaka (56) References JP-A-3-279330 (JP, A) JP-A-62-120306 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61K 6/00 CA (STN)

Claims (4)

(57) [Claims] 1. A paste type root canal enlarger comprising sodium hypochlorite and montmorillonite. 2. The blending amount of sodium hypochlorite is 3-1.
The root canal cleaning diluent according to claim 1, which is 0% by weight. 3. The root canal enlargement agent according to claim 1, wherein the amount of montmorillonite is 3 to 10% by weight. 4. A method for producing a root canal enlargement agent, comprising mixing montmorillonite swollen with water or a buffer solution with sodium hypochlorite to form a paste type.