JPH11302122A - Separating material for dental use - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a separating material for dental use capable of preventing the adhesion of a resin used as an adhesive, a restorative agent, etc., in the dental treatment to a contact surface of a dentin surface, a prosthesis surface, a mucous membrane surface in an oral cavity, etc., and easily separating both and good in operating efficiency such as coating or removal. SOLUTION: This separating material contains (A) 15-95 pts.wt. of a water-soluble or a water-dispersible hydroxyl group-containing compound having at least two hydroxyl groups in the molecule and <=15 deg.C solidifying point, e.g. ethylene glycol and (B) 5-85 pts.wt. of a water-soluble or a water-dispersible hydroxyl group-containing compound having at least two hydroxyl groups in the molecule and >=30 deg.C solidifying point, e.g. polyethylene glycol [the sum total of ingredients (A) and (B) is 100 pts.wt.].

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separating material for dental treatment, and more particularly, to a resin used as an adhesive or a restorative material and a contact surface such as a tooth surface, a prosthetic surface, or an oral mucosal surface. The present invention relates to a dental separation material used to prevent sticking.

[0002]

2. Description of the Related Art In dental treatment, an adhesive made of various resins is used to adhere a restoration to a tooth or a restoration. In this case, in the adhesive restoration of the restoration, the excess adhesive that has overflowed often adheres to the surface of the tooth, the surface of the prosthesis, the surface of the oral mucosa, the surface of the gingiva, or the like that does not require adhesion, and hardens. Unnecessarily sticky,
Removal of the hardened adhesive requires a great deal of effort, and can cause gingivitis if the hardened adhesive is incompletely removed beneath the gingiva.

[0003] Conventionally, an indirect method has been used for repairing deep carious cavities. In this method, a cavity is formed, an impression for preparing a restoration is taken, the cavity is temporarily covered with a temporary sealing material, and after the restoration is completed, the temporary sealing material is removed again and the restoration is attached. I do. However, this method requires several visits, and there is a concern that open dentin is susceptible to bacterial infection. For this reason, it is desirable to use a direct repair method in which an uncured resin is filled in place immediately after the cavity is formed, and a cured product that is cured by exposure to ultraviolet light is prepared and mounted. Since it is necessary to take out, surface-treat the surface in the cavity, and apply an adhesive, a separating material capable of reliably separating the cavity wall from the cured restoration is indispensable.

[0004] As described above, the adhesive adheres to a portion where the adhesive is unnecessary, and a separating material capable of separating the cured product after curing, and a cavity which is indispensable when the carious cavity is repaired by a direct method. There is a need for a separator that reliably separates the wall and the cured restoration. Of course, it is desirable that the operability of the separating material is good.

[0005] JP-B-63-37082 discloses polyethylene glycol 100 having an average molecular weight of 150 to 420.
A surface coating agent for completely leveling the surface of a dental resin restorative, which is obtained by mixing paste parts of 20 parts by weight and 20 to 200 parts by weight of polyethylene glycol having an average molecular weight of 1,800 to 20,000 is described. However,
The publication only describes that the surface coating is used to block oxygen with a polymerization-curable dental restorative material that is susceptible to polymerization inhibition by oxygen in the air. It is neither disclosed nor suggested for use as a separating material.

[0006]

An object of the present invention is to provide a resin used as an adhesive or restorative material in dental treatment with a contact surface such as a tooth surface, a prosthetic surface or an oral mucosa surface. An object of the present invention is to provide a dental separation material which can prevent sticking and can be easily separated from each other, and has good operability such as application and removal. Another object of the present invention is to provide a dental separation material capable of reliably separating a restoration, which is a cured product of an uncured curable resin filled in the cavity, from the cavity in the direct restoration method. .

[0007]

The present invention relates to the following dental separating material. (1) (A) having at least two hydroxyl groups in the molecule,
(B) a water-soluble or water-dispersible hydroxyl-containing compound having a freezing point of 15 ° C. or lower and 15 to 95 parts by weight;
It has at least two hydroxyl groups in the molecule and has a freezing point of 30
C. or higher and contains 5 to 85 parts by weight of a water-soluble or water-dispersible hydroxyl group-containing compound (here, the total of (A) and (B) is 100 parts by weight). Dental separation material. (2) The dental separation material according to the above (1), wherein the compound (B) is polyethylene glycol. (3) After forming a cavity in the carious tooth, apply a separating material to the cavity surface, then fill and cure the curable resin, take out the cured resin from the cavity, pre-treat the cavity surface and cure with adhesive (1) or a method for repairing a cavity of a carious tooth, which comprises bonding the cured resin body to a cavity, wherein the resin is used as a separating material applied to the cavity surface before filling with an uncured curable resin. The dental separating material according to (2).

The "water dispersibility" of the water-dispersible compound used in the present invention is as follows: 90% by weight of water and 10% by weight of (A)
Alternatively, it means that the compound (B) is dispersed and the layers are not separated by standing at room temperature for 30 minutes. The “water solubility” of the water-soluble compound used in the present invention means that the solubility in water is 5% by weight or more.

The hydroxyl group-containing compound (A) used in the present invention has at least two hydroxyl groups in the molecule and has a freezing point of 15 ° C. or lower, preferably 10 ° C. or lower. And (A) the hydroxyl group-containing compound is water-dispersible or water-soluble. When the hydroxyl group-containing compound (A) is water-soluble, the solubility in water is preferably 50% by weight or more, and most preferably dissolved in water at an arbitrary ratio. Examples of such (A) hydroxyl group-containing compounds include glycols such as ethylene glycol, propylene glycol and butanediol; polyhydric alcohols such as glycerin, 1,2,4-butanetriol and erythritol;
Polyethylene glycol of not more than 00, and molecular weight of 20
Preferable examples include polypropylene glycol of 00 or less. Among them, glycerin and polyethylene glycol having a molecular weight of 400 or less are particularly preferred.
These (A) hydroxyl group-containing compounds can be used alone or in combination of two or more.

The hydroxyl group-containing compound (B) used in the present invention has at least two hydroxyl groups in the molecule, and has a freezing point of 30 ° C. or higher, preferably 35 ° C. or higher, more preferably 40 ° C. or higher. And (B) the hydroxyl group-containing compound is water-dispersible or water-soluble. When the hydroxyl group-containing compound (B) is water-soluble, the solubility in water is preferably 50% by weight or more, and most preferably dissolved in water at an arbitrary ratio. Examples of (B) the hydroxyl group-containing compound include polyethylene glycol having an average molecular weight of 1,000 to 70,000, and polypropylene glycol and polyvinyl alcohol which are solid at room temperature. Among them, polyethylene glycol having an average molecular weight of 1300 to 50,000 is preferred. These (B) hydroxyl group-containing compounds can be used alone or in combination of two or more.

In the present invention, the freezing points of (A) the hydroxyl group-containing compound and (B) the hydroxyl group-containing compound are determined according to JIS K
0065. The average molecular weight is a value determined from a hydroxyl value by a neutralization titration method according to JIS K0070.

The compounding ratio of the both hydroxyl group-containing compounds is (A)
(B) 15 to 95 parts by weight, preferably 25 to 9 parts by weight of (A) a hydroxyl group-containing compound, with the total of both compounds being 100 parts by weight.
0 parts by weight, 5 to 85 parts by weight, preferably 10 to 75 parts by weight of the compound (B). When the compounding ratio of the compounds (A) and (B) is in the above range, the fluidity of the separating material is increased, and the separating material does not sag from the application surface, and the expected separating effect is not impaired, and the separating material becomes hard. As a result, the operability such as coating is not deteriorated.

In dental restorations, the surface that prevents sticking from the adhesive has various shapes. Therefore, it is desired that the separating material has low fluidity under normal operating temperature conditions and a small change in consistency. In the separation material of the present invention, two kinds of hydroxyl group-containing compounds having specific different freezing points, that is, a compound which is liquid at room temperature and a compound which is solid at room temperature, are blended, so that the compound can be used in a normal use environment (15 ° C. to 30 ° C.). ℃) is a paste without fluidity, little change in consistency,
It also has the advantage that it can be easily removed by washing with water. The consistency is measured according to JIS T6602 (measurement temperature 23
C), preferably 10 to 70, more preferably 15 to 65.

According to the present invention, it is possible to prepare a separation material in a form suitable for the intended use by appropriately mixing two kinds of polyvalent hydroxyl group-containing compounds having a specific freezing point. For example, tooth surface,
When the adhesive adheres to the prosthesis surface, oral mucosa surface, subgingival margin, etc., in order to easily separate and remove the cured product, the separating material applied to these surfaces should be applied with high consistency Preferably, it is easy. In this case, the hydroxyl group-containing compound having a freezing point of the compound (A) of 15 ° C. or lower is preferably 80 to 95 parts by weight, when the total amount of the hydroxyl group-containing compounds (A) and (B) is 100 parts by weight, More preferably, the solidification point of the compound (B) is 30 ° C.
By mixing the above-mentioned hydroxyl group-containing compound in a proportion of preferably 20 to 5 parts by weight, more preferably 15 to 10 parts by weight, a soft paste-like separating material having high consistency can be obtained.

[0015] Such a high-consistency separating material is used before applying an adhesive to a predetermined portion, and in advance, a portion that does not require adhesion, such as a tooth surface, a prosthetic surface, an oral mucosal surface, or a subgingival margin. Is applied at a coating amount of about 0.005 to 0.05 g / cm ² . By performing such a coating treatment, even if the adhesive sticks to the above-mentioned portion and is cured, the cured product can be easily separated and removed with, for example, a dental probe.

In the above-mentioned direct repair method, when the separation material requires low consistency and pressure resistance, the solidification point is set to 15 with the total amount of the hydroxyl group-containing compounds (A) and (B) being 100 parts by weight. (A) a hydroxyl group-containing compound having a freezing point of at most 40 to 15 parts by weight, more preferably 30 to 20 parts by weight; More preferably 70 to
By blending at a ratio of 80 parts by weight, a paste-like separating material having low hardness and high pressure resistance can be obtained.

When a caries tooth is directly treated using such a low-consistency hard paste-like separating material, the following method is used. That is, after the cavity is formed in the carious tooth, the separating material of the present invention is applied to the cavity surface. The application amount is about 0.002 to 0.01 g / cm ² . Thereafter, the cavity is filled with a curable resin and cured by exposure to actinic rays such as ultraviolet rays. Next, the resin cured body as a restoration is taken out from the cavity. At this time, since the cavity surface is previously coated with the dental separation material of the present invention, the cavity can be easily removed from the cavity. Next, the surface of the cavity from which the restoration has been removed is pre-treated, an adhesive is applied, and the restoration is fitted into the cavity and adhered to restore the cavity of the carious tooth. At the time of this bonding, the separation can be easily performed by applying a separating material to a portion that does not require bonding, as described above.

Further, since the dental separation material of the present invention is water-soluble or water-dispersible, it can be easily removed from the oral cavity by washing with water when it becomes unnecessary after application.

The separating material of the present invention contains the above two kinds of hydroxyl group-containing compounds as essential components, but other additives can be added as long as the object of the present invention is not impaired. Examples of the additive include known colorants such as pigments and dyes, water-miscible solvents such as water and alcohol, water-soluble polymers, and inorganic particles such as silica fine particles.

As the resin to be separated by the separation material of the present invention, the above-mentioned adhesives and repair materials are typical, but the separation material of the present invention is a resin used for other purposes and a contact surface thereof. Can also be applied to separation from

[0021]

Industrial Applicability The dental separation material of the present invention has good operability and separation ability for dental treatment, and adheres a resin used as an adhesive or a repair material to a contact surface such as a tooth surface. Can be prevented. Thus, for example, even if the adhesive used to adhere the therapeutic restoration to the dentin adheres to the dentin surface, prosthesis surface, oral mucosal surface, and cured resin surface that do not require the adhesive, If the dental separating material of the present invention is applied to the tooth surface in advance, the cured adhesive can be easily separated with a dental probe or the like. In addition, when performing the cavity repair method of carious teeth by the direct method,
After the cavity is formed, the restoration material of the present invention is applied to the cavity wall in advance, so that the restoration material hardened in the cavity can be reliably separated from the cavity wall. Can be easily performed.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to the following examples.

Example 1 (Production of Separating Materials 1 to 4 of the Present Invention) Production of Separating Material 1 30 g of glycerin (coagulation point of about 0 ° C.) and polyethylene glycol (PEG) 1540 (coagulation point of 40 to 50 ° C., number average molecular weight 1540) 70 g in a glass container,
Until a solution was obtained. Allow the solution to cool to room temperature,
A white hard paste (separation material 1) was obtained. The consistency of the separation material 1 was measured by the method of measuring the consistency according to JIS T6602 (measurement temperature 2
3 ° C.). Approximately 0.002 to 0.01 g of separation material 1 is placed on the cervical portion of the bovine tooth placed vertically.
/ Cm ² and allowed to stand for 1 minute. When the degree of sagging from the applied part was observed at a temperature of 37 ° C., no sagging from the applied position was observed.

Production of Separating Materials 2 to 4 Separating materials 2 to 4 were produced in the same manner as in the production method of the separating material 1 with the compounds shown in Table 1 and the compounding ratio thereof. Separation material 2-4
Is as shown in Table 1. When the degree of sagging was observed in the same manner as in the case of the separation material 1, no sagging was observed.

Example 2 (Production of Separating Materials 5 to 8) Production of Separating Material 5 PEG400 (solidification point: 4 to 8 ° C., number average molecular weight: 400)
85 g and 15 g of PEG 4000 (freezing point: 50 to 60 ° C., number average molecular weight: 4000) were placed in a glass container and heated to 70 ° C. to obtain a solution. The solution was allowed to cool to room temperature to obtain a translucent white soft paste-like separating material 5. The consistency of the separation material 5 was measured by the consistency measurement method (measuring temperature 23 ° C.) of JIS T6602, and it was 36. The separation material is 0.005 to 0.05 on the cervical part of the bovine tooth installed vertically.
After applying g / cm ² and allowed to stand for 1 minute, the degree of sagging from the applied part was observed at a temperature of 37 ° C., and no sagging from the applied position was observed.

Production of Separators 6 to 8 Separators 6 to 8 were produced in the same manner as in the production method of the separator 5 with the compounds shown in Table 1 and the compounding ratio thereof. Separation material 6-8
Is as shown in Table 1. When the degree of sagging was observed in the same manner as in the case of the separation material 5, no sagging was observed.

[0027]

[Table 1] The number average molecular weight of each polyethylene glycol is as follows. PEG400: 400 PEG1540: 1500 PEG2000: 2000 PEG4000: 3000

Example 3 (Evaluation of Separation Ability of Separating Materials 1 to 4) A cavity having a diameter of about 2 to 3 mm and a depth of 2 mm was formed on the front labial surface of the bovine.
After applying the separating material 1 to the inner wall of the cavity with a cotton swab, a commercially available composite resin “XRV Herculite (manufactured by KERR,
(Trademark) ". After irradiating and curing the composite resin filled in the cavity with a visible light irradiator for 60 seconds, it was confirmed that the cured resin body could be easily removed with tweezers. Separation materials 2 to 4 were also evaluated for separation performance in the same manner as in the method for confirming separation material 1. Regardless of which separation material was used, the cured resin body was easily removed from the cavity.

Comparative Example 1 The same procedure as in Example 3 was carried out except that only the operation of applying the separation material was omitted, and it was evaluated whether or not the resin body filled and cured in the bovine cavity could be taken out. Was.

Example 4 (Evaluation of Separation Ability of Separating Materials 5 to 8) Separating material 5 was applied to the cervical surface of bovine anterior teeth and the surface of Co-Cr alloy polished with # 2000 SiC abrasive paper, followed by brushing. A mixture of commercially available adhesive Super Bond (manufactured by Sun Medical Co., Ltd.) was applied and cured. After the adhesive was cured, it was evaluated whether the cured adhesive could be easily removed with a dental probe. Separation materials 6 to 8 were also evaluated for separation performance in the same manner as in the method for confirming separation material 5. The cured adhesive material could be easily removed using any of the separation materials.

Comparative Example 2 Cobalt polished with a # 2000 SiC abrasive paper and the cervical surface of the bovine anterior teeth in the same manner as in Example 4 without applying the separating material.
When the mixed mud of Super Bond was applied to the surface of the Cr alloy and cured to evaluate whether or not it could be easily removed, the cured adhesive could not be removed.

Claims (3)

[Claims] (A) 15 to 95 parts by weight of a water-soluble or water-dispersible hydroxyl-containing compound having at least two hydroxyl groups in a molecule, having a freezing point of 15 ° C. or lower, and (B) 5 to 85 parts by weight of a water-soluble or water-dispersible hydroxyl-containing compound having at least two hydroxyl groups in the molecule, having a freezing point of 30 ° C. or higher (where the total of (A) and (B) Is 100 parts by weight). 2. The dental separation material according to claim 1, wherein the compound (B) is polyethylene glycol. 3. After forming a cavity in a carious tooth, a separating material is applied to the cavity surface, and then a curable resin is filled and cured, a cured resin body is taken out from the cavity, and the surface of the cavity is pre-treated and an adhesive material is provided. 2. A method for repairing a cavity of a carious tooth, comprising bonding a cured resin body cured by the method to a cavity, wherein the method is used as a separating material applied to the cavity surface before filling with an uncured curable resin. Or the dental separating material according to 2.