JPH06135813A - Dental filler composition - Google Patents
Dental filler compositionInfo
- Publication number
- JPH06135813A JPH06135813A JP4282891A JP28289192A JPH06135813A JP H06135813 A JPH06135813 A JP H06135813A JP 4282891 A JP4282891 A JP 4282891A JP 28289192 A JP28289192 A JP 28289192A JP H06135813 A JPH06135813 A JP H06135813A
- Authority
- JP
- Japan
- Prior art keywords
- root canal
- pts
- filler
- weight
- composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- Dental Preparations (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は歯科用充填材組成物に関
するものである。詳しくは、充填後に根管や窩洞等の内
部で膨張することにより優れた封鎖性を発現する、歯科
用充填材組成物に関するものである。FIELD OF THE INVENTION The present invention relates to a dental filling composition. More specifically, the present invention relates to a dental filler composition that exhibits excellent sealing properties by expanding inside the root canal, cavity, etc. after filling.
【0002】[0002]
【従来の技術】根管充填材とは、根管治療において、根
管清掃、形成された根管空洞を封鎖して根管から歯周組
織への感染路を遮断するための材料である。従って、根
管充填材に求められる所要性質は、複雑な形態によく適
合し、緊密な封鎖性を発現することである。従来の代表
的な根管充填材料は、ガッタパーチャポイントである。
これは主にガッタパーチャと酸化亜鉛からなる円錐状の
ゴム質の材料である。これを根管に複数本挿入し、それ
以上挿入できなくなるほど緊密に充填した後、根管の外
にはみ出ている部分を熱した器具で切断、圧接し、その
上からセメント等で押さえて封鎖する方法(側方加圧充
填法)が、最も一般的に行われている。しかしながら一
般に根管の形状は複雑であり、ガッタパーチャポイント
と根管壁との間に間隙が生じる可能性が高く、十分な封
鎖性は期待できない。そのような欠点を改善する方法と
して、歯科用セメント(糊剤)のようなペースト状のも
のとガッタパーチャポイントとの組み合わせで使用する
方法もあるが、セメントとガッタパーチャポイントとの
馴染みが悪い等の問題があり、十分な封鎖性が得られて
いないのが現状である。2. Description of the Related Art A root canal filling material is a material for root canal cleaning and sealing of a root canal cavity formed in a root canal treatment to block an infection path from a root canal to a periodontal tissue. Therefore, the required property required for the root canal filling material is that it is well adapted to a complicated morphology and exhibits a tight sealing property. A typical conventional root canal filling material is a gutta-percha point.
It is a conical rubbery material consisting mainly of gutta-percha and zinc oxide. Insert multiple pieces of this into the root canal, and fill the root canal so tightly that it cannot be inserted any more.Then, cut off the part protruding outside the root canal with a heated instrument, press it, and press it with cement etc. to close it. The method (side pressure filling method) is most commonly used. However, in general, the shape of the root canal is complicated, and a gap is likely to occur between the gutta-percha point and the root canal wall, and sufficient sealing performance cannot be expected. As a method of improving such a defect, there is a method of using a paste-like material such as dental cement (gluing agent) in combination with the gutta-percha point, but the problem that the cement and the gutta-percha point are not well-known However, the current situation is that sufficient blocking performance has not been obtained.
【0003】[0003]
【発明が解決しようとする課題】本願発明者らは、根管
等に対する封鎖性が単独で優れる充填材組成物を開発す
べく、鋭意研究を重ねた。DISCLOSURE OF THE INVENTION The inventors of the present invention have conducted extensive studies to develop a filler composition which is excellent in the ability to seal root canals and the like alone.
【0004】[0004]
【課題を解決するための手段】その結果、高吸水性樹脂
を適当な割合で配合してなる組成物が、好ましい性質を
有することを見いだし、本願発明を開発するに至った。As a result, the inventors have found that a composition prepared by mixing a highly water-absorbent resin in an appropriate ratio has desirable properties, and have developed the present invention.
【0005】即ち、本願発明は、(A)熱可塑性弾性樹
脂10〜90重量部、(B)充填材10〜90重量部、
及び(C)高吸水性樹脂0.1〜10重量部[但し、
(A)+(B)は100重量部であり、(C)は(A)
+(B)の合計量100重量部当たりの量を示す]を含
有してなることを特徴とする歯科用充填材組成物であ
る。That is, according to the present invention, (A) 10 to 90 parts by weight of thermoplastic elastic resin, (B) 10 to 90 parts by weight of filler,
And (C) 0.1 to 10 parts by weight of super absorbent resin [however,
(A) + (B) is 100 parts by weight, (C) is (A)
+ Indicates the total amount of (B) per 100 parts by weight]] is a dental filler composition.
【0006】本願発明に使用される熱可塑性弾性樹脂
は、常温では弾性を有しており、比較的低温で軟化する
ものであれば、特に限定されない。代表的なものを具体
的に示せば、ガッタパーチャ、ポリイソプレン、スチレ
ン系熱可塑性エラストマー、オレフィン系熱可塑性エラ
ストマー、ウレタン系熱可塑性エラストマー、ポリエス
テル系熱可塑性エラストマー、1,2−ポリブタジエン
系熱可塑性エラストマー等が挙げられる。The thermoplastic elastic resin used in the present invention is not particularly limited as long as it has elasticity at room temperature and softens at a relatively low temperature. Typical examples are gutta-percha, polyisoprene, styrene-based thermoplastic elastomer, olefin-based thermoplastic elastomer, urethane-based thermoplastic elastomer, polyester-based thermoplastic elastomer, and 1,2-polybutadiene-based thermoplastic elastomer. Is mentioned.
【0007】該熱可塑性弾性樹脂の適当な配合量は、1
0〜90重量部である。10重量部より少ない場合は、
組成物が常温で弾性を示さず、その結果高吸水性樹脂の
吸水膨張効果が発現されにくくなる。また、90重量部
を越える場合は、組成物の強度が不十分となるため、充
填操作が困難となる。A suitable blending amount of the thermoplastic elastic resin is 1
0 to 90 parts by weight. If less than 10 parts by weight,
The composition does not exhibit elasticity at room temperature, and as a result, the water-absorption expansion effect of the highly water-absorbent resin becomes difficult to be exhibited. On the other hand, if the amount exceeds 90 parts by weight, the strength of the composition becomes insufficient and the filling operation becomes difficult.
【0008】なお、上記配合量は、熱可塑性弾性樹脂と
後述する充填材との合計量が100重量部となるように
配合した時の量である。充填材の配合量も同様である。The above blending amount is the amount when blended so that the total amount of the thermoplastic elastic resin and the below-mentioned filler is 100 parts by weight. The same applies to the compounding amount of the filler.
【0009】本願発明に使用される充填材は、無機物粉
体、有機物粉体、有機無機複合物粉体など何ら制限され
ず、またそれらを組み合わせて混合したものでも良い。
代表的ものを具体的に示せば、酸化亜鉛、粉砕石英、湿
式シリカ、乾式シリカ、カーボンブラック、ケイソウ
土、ガラス繊維、アルミナ、マグネシア、炭酸カルシウ
ム、炭酸マグネシウム、粉砕ポリマー、粉末ポリマーな
どが挙げられる。ただし、根管充填材として使用する場
合は、臨床上、根管充填材にはX線造影性がなければな
らないので、充填材の中の少なくとも1種は重金属化合
物であることが好ましい。その代表的なものを具体的に
示せば、リチウム、バリウム、ストロンチウム、ジルコ
ニウム等の酸化物や塩等が挙げられる。The filler used in the present invention is not limited to an inorganic powder, an organic powder, an organic-inorganic composite powder, or may be a mixture of them in combination.
Typical examples include zinc oxide, crushed quartz, wet silica, dry silica, carbon black, diatomaceous earth, glass fiber, alumina, magnesia, calcium carbonate, magnesium carbonate, crushed polymer, and powdered polymer. . However, when used as a root canal filler, clinically, the root canal filler must have an X-ray contrast property, and therefore at least one of the fillers is preferably a heavy metal compound. Typical examples thereof include oxides and salts of lithium, barium, strontium, zirconium and the like.
【0010】該充填材の配合量は10〜90重量部が適
当である。10重量部未満の場合、組成物の強度は不十
分となり、充填操作が困難となる。また90重量部を越
える場合は、組成物が弾性の乏しいものとなるため、高
吸水性樹脂の吸水膨張効果が十分に発現されない。The compounding amount of the filler is appropriately 10 to 90 parts by weight. When the amount is less than 10 parts by weight, the strength of the composition becomes insufficient and the filling operation becomes difficult. On the other hand, when it exceeds 90 parts by weight, the composition becomes poor in elasticity, so that the water-absorption expansion effect of the highly water-absorbent resin is not sufficiently exhibited.
【0011】本願発明に使用される高吸水性樹脂は、本
来水溶性である電解質ポリマーの鎖同士をゆるく橋かけ
したもので、その網目の中に自重の数十倍から数千倍以
上の水分を保持することができるものである。The superabsorbent resin used in the present invention is obtained by loosely bridging the chains of an electrolyte polymer which is originally water-soluble, and has a water content of several tens to several thousand times its own weight in the mesh. Is the one that can hold.
【0012】該高吸水性樹脂の代表的なものを具体的に
示せば、ポリアクリル酸ソーダ、アクリル酸・ビニルア
ルコール共重合体、酢酸ビニル・アクリル酸エステル共
重合体鹸化物、ポリビニルアルコール・無水マレイン酸
反応物、イソブチレン・マレイン酸共重合物架橋体、ポ
リアクリロニトリル系鹸化物、澱粉・アクリロニトリル
グラフト共重合体鹸化物、カルボキシメチルセルロース
架橋物などが挙げられる。これらの高吸水性樹脂はジェ
ットミルなどの公知の方法で粉砕し、粒径数百μm〜
0.1μmの粉体にしたものが好適に使用できる。特に
充填材組成物をできるだけ均一に膨張させるためには、
より粒径の小さい20μm以下のものが好ましい。Typical examples of the highly water-absorbent resin are sodium polyacrylate, acrylic acid / vinyl alcohol copolymer, vinyl acetate / acrylic acid ester copolymer saponified product, polyvinyl alcohol / anhydrous. Examples thereof include a maleic acid reaction product, an isobutylene / maleic acid copolymer crosslinked product, a polyacrylonitrile-based saponified product, a starch / acrylonitrile graft copolymer saponified product, and a carboxymethylcellulose crosslinked product. These highly water-absorbent resins are pulverized by a known method such as a jet mill to have a particle size of several hundred μm
A powder of 0.1 μm can be preferably used. In particular, in order to expand the filler composition as uniformly as possible,
Those having a smaller particle size of 20 μm or less are preferable.
【0013】該高吸水性樹脂を配合してなる歯科用充填
材組成物は、例えば、根管内に充填された後、組織液を
吸収して適度に膨張し、根管壁面に密着し、優れた封鎖
性を発現する。A dental filling composition containing the superabsorbent resin is, for example, filled in the root canal, absorbs tissue fluid and appropriately expands, and adheres well to the wall surface of the root canal. Expresses a blocking property.
【0014】この高吸水性樹脂の配合量は、前記熱可塑
性弾性樹脂と充填材の合計量100重量部当たり0.1
〜10重量部が好適である。0.1重量部より少ない場
合は、吸水膨張量が少ないため良好な封鎖性を発現でき
ない。また10重量部より多い場合は、吸水膨張量が多
すぎて、周辺の組織、例えば根尖歯周組織に圧迫感を与
える可能性があり、好ましくない。The amount of the highly water-absorbent resin blended is 0.1 per 100 parts by weight of the total amount of the thermoplastic elastic resin and the filler.
-10 parts by weight is preferred. When the amount is less than 0.1 part by weight, the water-swelling amount is small and the good sealing property cannot be exhibited. On the other hand, if the amount is more than 10 parts by weight, the amount of water absorption swelling is too large, which may give a feeling of pressure to the surrounding tissues, for example, the apical periodontal tissue, which is not preferable.
【0015】本願発明の歯科用充填材組成物において
は、その物性を著しく低下しない範囲で更に他の添加剤
を添加してもよい。かかる添加剤としては、パラフィン
ワックス、可塑剤、顔料、酸化防止剤、抗菌剤、界面活
性剤等が挙げられる。In the dental filler composition of the present invention, other additives may be added as long as the physical properties are not significantly deteriorated. Examples of such additives include paraffin wax, plasticizers, pigments, antioxidants, antibacterial agents, and surfactants.
【0016】本願発明の歯科用充填材組成物の調製方法
は、既知の歯科用充填材組成物の調製方法となんら変わ
ることはない。即ち、熱可塑性弾性樹脂、充填材、高吸
水性樹脂及び必要に応じて添加剤等を適量計量し、加温
しつつニーダー等の一般的な混練機によって均一になる
まで混練し、円錐状に成型することにより、常温で弾性
を有する組成物を得ることができる。The method for preparing the dental filling composition of the present invention is no different from the known method for preparing a dental filling composition. That is, an appropriate amount of a thermoplastic elastic resin, a filler, a highly water-absorbent resin, and additives, etc. are weighed and kneaded with a general kneader such as a kneader while heating to a uniform cone shape. By molding, a composition having elasticity at room temperature can be obtained.
【0017】本願発明の歯科用充填材組成物の使用方法
は、通常の根管充填材ガッタパーチャポイント等と同様
である。即ち、根管治療においては、清掃し、形成され
た根管空洞に、円錐状の該組成物を複数本挿入し、それ
以上挿入できなくなるほど緊密に充填した後、根管の外
にはみ出ている部分を熱した器具で切断、圧接し、その
上からセメント等で押さえて封鎖する。The method of using the dental filling material composition of the present invention is the same as that for a normal root canal filling material gutta-percha point and the like. That is, in root canal treatment, after cleaning, a plurality of conical compositions are inserted into the formed root canal cavity, and the composition is tightly packed so that it cannot be inserted any more, and then the root canal is protruded. Cut the part with a heated tool, press it, and press down with cement etc. to close it.
【0018】[0018]
【発明の効果】本願発明により得られた歯科用充填材組
成物は、根管充填材として使用した場合、充填後に根管
内で適度な吸水膨張を起こし根管壁面に密着するので、
たとえ複雑な形態の根管においてでも、優れた封鎖性を
発現する。そのため根管内および根尖歯周組織の感染の
問題が起こりにくい。更に本発明の歯科用充填材組成物
は、根管充填材としてのみならず歯牙窩洞の充填材とし
ても有用である。The dental filling material composition obtained by the present invention, when used as a root canal filling material, causes an appropriate water absorption expansion in the root canal after filling and adheres to the root canal wall surface.
Even in a complex root canal, it exhibits excellent sealing ability. Therefore, the problem of infection of root canal and apical periodontal tissue is unlikely to occur. Furthermore, the dental filling composition of the present invention is useful not only as a root canal filling material but also as a filling material for a dental cavity.
【0019】[0019]
【実施例】本願発明を更に具体的に説明するため実施例
を示すが、本発明はこれらの実施例に限定されるもので
はない。EXAMPLES Examples will be shown to more specifically describe the present invention, but the present invention is not limited to these examples.
【0020】以下の実施例及び比較例に使用する高吸水
性樹脂及びその粉体の粒子径を表1に示す。Table 1 shows the particle diameters of the super absorbent polymer and its powder used in the following examples and comparative examples.
【0021】[0021]
【表1】 [Table 1]
【0022】また、以下の実施例の中で使用するウレタ
ン系熱可塑性エラストマーとは、アジピン酸エステルポ
リオールにポリイソシアネートを付加重合したものであ
る。なお、実施例、比較例において、歯科用充填材組成
物の密封性の評価は下記の方法によって行い、同一試料
について3回実施してその結果の平均を記録した。封鎖
性試験方法抜去した新鮮牛歯の根管を清掃、形成し、試
料を前述の側方加圧充填法に従って充填する。ただし充
填材の上部はセメント等では封鎖しない。これを37℃
の水中に24時間浸漬する。その後、濃度0.1%のフ
クシン水溶液中において、4℃と60℃の熱サイクルを
600往復行う。熱サイクル終了後、牛歯を縦方向に切
断し、色素の侵入状態を肉眼により観察する。評価は以
下の3段階とする。 A…根管への色素の侵入がまったく認められない。The urethane-based thermoplastic elastomer used in the following examples is an adipic ester polyol obtained by addition-polymerizing polyisocyanate. In Examples and Comparative Examples, the sealing property of the dental filling composition was evaluated by the following method, and the same sample was tested three times, and the average of the results was recorded. Sealability test method A root canal of a freshly extracted bovine tooth is cleaned and formed, and a sample is filled according to the above-described lateral pressure filling method. However, the top of the filler is not blocked with cement or the like. This is 37 ℃
Immerse in water for 24 hours. Then, a thermal cycle of 4 ° C. and 60 ° C. is repeated 600 times in a fuchsin aqueous solution having a concentration of 0.1%. After the end of the heat cycle, the bovine tooth is cut in the longitudinal direction, and the invading state of the dye is visually observed. The evaluation is made in the following three stages. A ... No invasion of pigment into the root canal is observed.
【0023】B…根管上部まで色素の侵入が認められ
る。B ... Invasion of pigment is recognized up to the upper part of the root canal.
【0024】C…根管中央部まで色素の侵入が認められ
る。C ... Invasion of pigment is recognized up to the central part of the root canal.
【0025】D…根尖部に近い部分まで色素の侵入が認
められる。D ... Penetration of the dye is recognized up to the portion near the apex.
【0026】E…根尖部まで色素が侵入している。E ... Pigment penetrates to the apex.
【0027】この試験を行った結果、評価がAであった
ものを、根管に対する封鎖性が良好であると判断する。As a result of conducting this test, those having an evaluation of A are judged to have good sealing ability to the root canal.
【0028】実施例1〜8,比較例1,2 表2に示した組成で各原料を計り取り、80℃に加温し
たニーダーによって混練し、組成物を作製した。組成物
は一般のガッタパーチャポイントと同様の円錐型に成型
し、封鎖性試験を行った。結果を表2に合わせて示す。Examples 1 to 8 and Comparative Examples 1 and 2 Raw materials having the compositions shown in Table 2 were weighed and kneaded with a kneader heated to 80 ° C. to prepare compositions. The composition was molded into a conical shape similar to a general gutta-percha point, and a sealability test was conducted. The results are also shown in Table 2.
【0029】[0029]
【表2】 [Table 2]
Claims (1)
部、(B)充填材10〜90重量部、及び(C)高吸水
性樹脂0.1〜10重量部[但し、(A)+(B)は1
00重量部であり、(C)は(A)+(B)の合計量1
00重量部当たりの量を示す]を含有してなることを特
徴とする歯科用充填材組成物。1. (A) 10 to 90 parts by weight of a thermoplastic elastic resin, (B) 10 to 90 parts by weight of a filler, and (C) 0.1 to 10 parts by weight of a super absorbent resin [provided that (A) + (B) is 1
(C) is the total amount of (A) + (B) 1
[Indicates the amount per 00 parts by weight]].
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4282891A JPH06135813A (en) | 1992-10-21 | 1992-10-21 | Dental filler composition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4282891A JPH06135813A (en) | 1992-10-21 | 1992-10-21 | Dental filler composition |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06135813A true JPH06135813A (en) | 1994-05-17 |
Family
ID=17658442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4282891A Pending JPH06135813A (en) | 1992-10-21 | 1992-10-21 | Dental filler composition |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06135813A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020035727A (en) * | 2000-11-08 | 2002-05-15 | 오석송 | Method for manufacturing temporary hydraulic material for access cavity |
JP2017145196A (en) * | 2016-02-15 | 2017-08-24 | 株式会社松風 | Root canal-filling sealer composition |
JP2017145195A (en) * | 2016-02-15 | 2017-08-24 | 株式会社松風 | Two-paste type root canal-filling sealer composition |
-
1992
- 1992-10-21 JP JP4282891A patent/JPH06135813A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020035727A (en) * | 2000-11-08 | 2002-05-15 | 오석송 | Method for manufacturing temporary hydraulic material for access cavity |
JP2017145196A (en) * | 2016-02-15 | 2017-08-24 | 株式会社松風 | Root canal-filling sealer composition |
JP2017145195A (en) * | 2016-02-15 | 2017-08-24 | 株式会社松風 | Two-paste type root canal-filling sealer composition |
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