JPH0333122B2 - - Google Patents
Info
- Publication number
- JPH0333122B2 JPH0333122B2 JP17348584A JP17348584A JPH0333122B2 JP H0333122 B2 JPH0333122 B2 JP H0333122B2 JP 17348584 A JP17348584 A JP 17348584A JP 17348584 A JP17348584 A JP 17348584A JP H0333122 B2 JPH0333122 B2 JP H0333122B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- denture base
- molding
- denture
- aromatic polyester
- 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.)
- Expired - Lifetime
Links
- 229920005989 resin Polymers 0.000 claims description 25
- 239000011347 resin Substances 0.000 claims description 25
- 229920000728 polyester Polymers 0.000 claims description 22
- 125000003118 aryl group Chemical group 0.000 claims description 21
- 239000011505 plaster Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 11
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 10
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims description 9
- 229920000515 polycarbonate Polymers 0.000 claims description 9
- 239000004417 polycarbonate Substances 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 8
- 229920006015 heat resistant resin Polymers 0.000 claims description 7
- 229920001169 thermoplastic Polymers 0.000 claims description 7
- 239000004416 thermosoftening plastic Substances 0.000 claims description 7
- 238000000748 compression moulding Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000001721 transfer moulding Methods 0.000 claims description 3
- LCHYEKKJCUJAKN-UHFFFAOYSA-N 2-propylphenol Chemical compound CCCC1=CC=CC=C1O LCHYEKKJCUJAKN-UHFFFAOYSA-N 0.000 claims 1
- 229920000178 Acrylic resin Polymers 0.000 description 19
- 239000004925 Acrylic resin Substances 0.000 description 19
- 239000000178 monomer Substances 0.000 description 12
- 238000006116 polymerization reaction Methods 0.000 description 12
- 230000008439 repair process Effects 0.000 description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 10
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 8
- 229920002492 poly(sulfone) Polymers 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229920005992 thermoplastic resin Polymers 0.000 description 5
- 206010062544 Tooth fracture Diseases 0.000 description 4
- -1 aromatic dicarboxylic acids Chemical class 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000001993 wax Substances 0.000 description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 238000012695 Interfacial polymerization Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 2
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical class C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 2
- 229930185605 Bisphenol Natural products 0.000 description 2
- 229920003278 Udel® P1700 Polymers 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- HCNHNBLSNVSJTJ-UHFFFAOYSA-N 1,1-Bis(4-hydroxyphenyl)ethane Chemical compound C=1C=C(O)C=CC=1C(C)C1=CC=C(O)C=C1 HCNHNBLSNVSJTJ-UHFFFAOYSA-N 0.000 description 1
- URFNSYWAGGETFK-UHFFFAOYSA-N 1,2-bis(4-hydroxyphenyl)ethane Natural products C1=CC(O)=CC=C1CCC1=CC=C(O)C=C1 URFNSYWAGGETFK-UHFFFAOYSA-N 0.000 description 1
- WIFDRXSVRSCMMY-UHFFFAOYSA-N 2,6-dichloro-4-[(3,5-dichloro-4-hydroxyphenyl)methyl]phenol Chemical compound C1=C(Cl)C(O)=C(Cl)C=C1CC1=CC(Cl)=C(O)C(Cl)=C1 WIFDRXSVRSCMMY-UHFFFAOYSA-N 0.000 description 1
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 1
- ODJUOZPKKHIEOZ-UHFFFAOYSA-N 4-[2-(4-hydroxy-3,5-dimethylphenyl)propan-2-yl]-2,6-dimethylphenol Chemical compound CC1=C(O)C(C)=CC(C(C)(C)C=2C=C(C)C(O)=C(C)C=2)=C1 ODJUOZPKKHIEOZ-UHFFFAOYSA-N 0.000 description 1
- 125000004203 4-hydroxyphenyl group Chemical group [H]OC1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000172 allergic effect Effects 0.000 description 1
- 210000001909 alveolar process Anatomy 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 208000010668 atopic eczema Diseases 0.000 description 1
- FDQSRULYDNDXQB-UHFFFAOYSA-N benzene-1,3-dicarbonyl chloride Chemical compound ClC(=O)C1=CC=CC(C(Cl)=O)=C1 FDQSRULYDNDXQB-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 235000021059 hard food Nutrition 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- LXEJRKJRKIFVNY-UHFFFAOYSA-N terephthaloyl chloride Chemical compound ClC(=O)C1=CC=C(C(Cl)=O)C=C1 LXEJRKJRKIFVNY-UHFFFAOYSA-N 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Dental Prosthetics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Dental Preparations (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、フラスコに囲まれた義歯床形空洞を
囲繞する石膏型により熱可塑性耐熱樹脂を射出成
形法、押出成形法、トランスフアー成形法又は圧
縮成形法等で成形し、樹脂冷却硬化後石膏型を破
砕して得られる樹脂製義歯床に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to injection molding, extrusion, transfer molding or compression of a thermoplastic heat-resistant resin using a plaster mold surrounding a denture base-shaped cavity surrounded by a flask. The present invention relates to a resin denture base obtained by molding by a molding method or the like, cooling and hardening the resin, and then crushing the plaster mold.
従来の技術
従来の樹脂製義歯床は、長年の間アクリル系樹
脂を用い、ポリマーとモノマーの加熱重合による
加圧成形法により得ていた。そしてこれは、補修
材料として同一のアクリルポリマー粉末とアクリ
ルモノマー液を用いるため補修が簡便である利点
があつた。BACKGROUND ART Conventional resin denture bases have been made of acrylic resins for many years and have been obtained by pressure molding by heating and polymerizing polymers and monomers. This has the advantage that repair is easy because the same acrylic polymer powder and acrylic monomer liquid are used as repair materials.
しかしこの様なアクリル系樹脂の加熱重合によ
り得られた義歯床は脆く、薄い部分は咬合力によ
り破折することが多い強度的な欠点とともに加熱
重合反応が不十分な場合が多いため、残留モノマ
ーが溶出してアレルギー症状を起すといつた衛生
上の欠点をも有するものであつた。 However, denture bases obtained by heating polymerization of such acrylic resins are brittle, and the thin portions often break due to occlusal force, resulting in poor strength and the heating polymerization reaction is often insufficient, resulting in residual monomers. It also had hygienic drawbacks, such as leaching and causing allergic symptoms.
そこで、このような欠点を除去するものとして
ポリサルホン樹脂を石膏型を用いて射出成形する
ものが提案されており実用化されるようになつて
来た。 In order to eliminate these drawbacks, injection molding of polysulfone resin using a plaster mold has been proposed and has come into practical use.
このポリサルホン樹脂はエンジニアリングプラ
スチツクの一種で機械的強度が高く、耐衝撃性に
すぐれているが、従来一般的に使用されているア
クリル樹脂製人工歯との接着性がわるく、特別の
維持装置や接着剤を使用してもなお、接着性が不
十分であり、実用上、例えば比較的硬い食物を咬
んだ際などに人工歯がはずれやすいなどの問題が
ある。 This polysulfone resin is a type of engineering plastic with high mechanical strength and excellent impact resistance, but it has poor adhesion with the commonly used acrylic resin artificial teeth, and requires special maintenance devices and adhesives. Even with the use of adhesives, the adhesion is still insufficient, and there are practical problems, such as the fact that the artificial teeth tend to come off when biting into relatively hard food.
又ポリサルホン樹脂はアクリルモノマー液に接
するとストレスクラツキングを起すため従来のア
クリル樹脂製義歯床に用いられている補修用即時
重合レジンが使用できず、補修が困難であり長期
間の使用に耐え得ないのが実情であつた。 In addition, polysulfone resin causes stress cracking when it comes into contact with acrylic monomer liquid, so the instant polymerization resin for repairs used in conventional acrylic resin denture bases cannot be used, making repairs difficult and making it difficult to withstand long-term use. The reality was that it was not possible.
しかしアクリルモノマーに代わる補修材料が提
案されていないため、アクリルモノマーに十分耐
え得る熱可塑性樹脂製義歯床が切望されていた。 However, since no repair material has been proposed to replace acrylic monomers, there has been a strong need for a thermoplastic resin denture base that can sufficiently withstand acrylic monomers.
発明が解決しようとする問題点
本発明はかかる従来欠点を除去し得る熱可塑性
樹脂製義歯床を提供することを目的とするもので
ある。すなわち、義歯床形空洞を囲繞する石膏型
により熱可塑性耐熱樹脂を成形し、石膏型を破砕
して得られる樹脂製義歯床において、人工歯とし
てアクリル樹脂製レジン歯を用いた場合も人工歯
と義歯床の間に強力な接着性が得られ、補修の際
に用いられるアクリルモノマー液を接してもクラ
ツクを生起せず、その他義歯床に要求される特
性、すなわち、透明性、歯肉様着色性、強度、剛
性等をすべて備えた樹脂製義歯床を提供すること
にある。Problems to be Solved by the Invention The object of the present invention is to provide a thermoplastic resin denture base that can eliminate the conventional drawbacks. In other words, in a resin denture base obtained by molding thermoplastic heat-resistant resin into a plaster mold surrounding a denture base-shaped cavity and crushing the plaster mold, even if acrylic resin resin teeth are used as artificial teeth, they will not be treated as artificial teeth. It provides strong adhesion between the denture bases, does not cause cracks even when in contact with the acrylic monomer solution used for repairs, and has other properties required for denture bases, such as transparency, gingival-like staining, and strength. The object of the present invention is to provide a resin denture base that has all of the following: , rigidity, etc.
問題点を解決するための手段
本発明の特徴とする処は、義歯床形空洞を囲繞
する石膏型により熱可塑性耐熱樹脂を射出成形、
押出成形、トランスフアー成形、圧縮成形などに
より成形し、石膏型を破砕して得られる樹脂製義
歯床において、前記熱可塑性耐熱樹脂がテレフタ
ル酸とイソフタル酸またはこれらの機能誘導体の
混合物（ただし、テレフタル酸基とイソフタル酸
基のモル比は９：１乃至１：９）および２，２−
ビス（4′−ヒドロキシフエニル）プロパンとから
得られる芳香族ポリエステル共重合体またはこれ
とポリカーボネートからなる混和物であることで
ある。Means for Solving the Problems The present invention is characterized by injection molding of a thermoplastic heat-resistant resin using a plaster mold surrounding a denture base-shaped cavity.
In a resin denture base formed by extrusion molding, transfer molding, compression molding, etc. and obtained by crushing a plaster mold, the thermoplastic heat-resistant resin is a mixture of terephthalic acid, isophthalic acid, or a functional derivative thereof (however, terephthalic acid The molar ratio of acid groups to isophthalic acid groups is 9:1 to 1:9) and 2,2-
The aromatic polyester copolymer is an aromatic polyester copolymer obtained from bis(4'-hydroxyphenyl)propane, or a mixture of this and polycarbonate.
本発明において使用される芳香族ポリエステル
共重合体は、テレフタル酸とイソフタル酸または
これらの機能誘導体の混合物（ただし、テレフタ
ル酸基とイソフタル酸基のモル比は９：１乃至
１：９）および２，２−ビス（4′−ヒドロキシフ
エニル）プロパン（以下ビスフエノールＡと略称
する）とから得られる共重合体である。 The aromatic polyester copolymer used in the present invention is a mixture of terephthalic acid and isophthalic acid or their functional derivatives (however, the molar ratio of terephthalic acid groups to isophthalic acid groups is 9:1 to 1:9) and 2 , 2-bis(4'-hydroxyphenyl)propane (hereinafter abbreviated as bisphenol A).
このような芳香族ポリエステル共重合体の製造
方法としては、水と相溶しない有機溶剤にとかし
た芳香族ジカルボン酸クロリドとアルカリ水溶液
にとかしたビスフエノール類とを混合反応せしめ
るいわゆる界面重合（W.M.Eareckson.J.Poly.
Sci.XL399、1959年、特公昭40−1959）、芳香族
ジカルボン酸クロリドとビスフエノール類とを有
機溶剤中で反応せしめる溶液重合（A.Conix.Ind.
Eng.Chem.51 147、1959年、特公昭37−5599）、
芳香族ジカルボン酸とビスフエノール類を無水酢
酸の存在下で加熱する熔融重合（特公昭38−
15247）、芳香族ジカルボン酸とビスフエノール類
をジアリールカーボナートの存在下で加熱する熔
融重合（特公昭38−26299）などの方法が知られ
ている。 A method for producing such an aromatic polyester copolymer is so-called interfacial polymerization (WMEareckson. J.Poly.
Sci.
Eng.Chem. 51 147, 1959, Special Publication No. 37-5599),
Melt polymerization of aromatic dicarboxylic acids and bisphenols by heating in the presence of acetic anhydride
15247) and melt polymerization of aromatic dicarboxylic acids and bisphenols in the presence of diaryl carbonate (Japanese Patent Publication No. 38-26299).
本発明に使用される該芳香族ポリエステル共重
合体に、ポリカーボネート、ポリエステルカーボ
ネート又はポリエチレンテレフタレートを目的に
応じて、適当量配合することが可能である。これ
らの樹脂は該芳香族ポリエステル共重合体との相
溶性が良好であり、芳香族ポリエステル共重合体
の義歯床用として必要な特性である透明性、色
調、強度、剛性、アクリル樹脂製人工歯との接着
性、アクリルモノマーに対する耐性等を低下させ
ることなく、加工温度を低下させることができ
る。さらに、該芳香族ポリエステル共重合体の黄
色味が軽減され、義歯床としての必要なより多様
な着色が可能となるなどの利点を有するため好ま
しい。 An appropriate amount of polycarbonate, polyester carbonate or polyethylene terephthalate can be blended into the aromatic polyester copolymer used in the present invention depending on the purpose. These resins have good compatibility with the aromatic polyester copolymer, and have the characteristics required for aromatic polyester copolymers for denture bases, such as transparency, color tone, strength, and rigidity, and acrylic resin artificial teeth. The processing temperature can be lowered without reducing the adhesion to acrylic monomers, resistance to acrylic monomers, etc. Furthermore, the aromatic polyester copolymer is preferable because it has the advantage that the yellowish tint is reduced and a variety of colors necessary for a denture base can be applied.
特に、該芳香族ポリエステル共重合体30〜95重
量％、ポリカーボネート70〜５重量％からなる混
和物である時、前記透明性、色調、強度、剛性、
アクリル樹脂製人工歯との接着性、アクリルモノ
マーに対する耐性、射出成形、圧縮成形等による
義歯床成形性が該芳香族ポリエステル共重合体単
体に比べよりバランスのとれた良好な性質を示す
とともに表面硬度が高く、歯ブラシによる耐摩耗
性がすぐれ、義歯床成形後の機械加工による仕上
げ加工性も良好であるなど、義歯床としてよりす
ぐれた性質を有するため好ましい。 In particular, when the mixture is composed of 30 to 95% by weight of the aromatic polyester copolymer and 70 to 5% by weight of polycarbonate, the transparency, color tone, strength, rigidity,
Adhesiveness to acrylic resin artificial teeth, resistance to acrylic monomers, moldability of denture bases by injection molding, compression molding, etc. are more well-balanced than that of the aromatic polyester copolymer alone, and the surface hardness is also good. It is preferable because it has excellent properties as a denture base, such as high abrasion resistance with a toothbrush, and good finishability by machining after molding the denture base.
本発明において好ましく配合されるポリカーボ
ネートは、４，４−ジオキシジアリルアルカン系
ポリカーボネートで、たとえばビス（４−ヒドロ
キシフエニル）メタン、ビス（４−ヒドロキシフ
エニル）エタン、２，２−ビス（４−ヒドロキシ
フエニル）プロパン、ビス（４−ヒドロキシ−
３，５−ジクロロフエニル）メタン、２，２−ビ
ス（４−ヒドロキシ−３，５−ジメチルフエニ
ル）プロパン、ビス（４−ヒドロキシフエニル）
フエニルメタン等の４，４−ジオキシジフエニル
アルカンとホスゲンあるいはジフエニルカーボネ
ートより得られるものである。このようなポリカ
ーボネートはすぐに公知の溶融重合、界面重合な
ど各種方法により製造される。 The polycarbonate preferably blended in the present invention is a 4,4-dioxydiallylalkane polycarbonate, such as bis(4-hydroxyphenyl)methane, bis(4-hydroxyphenyl)ethane, 2,2-bis(4 -hydroxyphenyl)propane, bis(4-hydroxy-
3,5-dichlorophenyl)methane, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, bis(4-hydroxyphenyl)
It is obtained from 4,4-dioxydiphenylalkane such as phenylmethane and phosgene or diphenyl carbonate. Such polycarbonate can be produced by various methods such as known melt polymerization and interfacial polymerization.
なお、本発明に使用される芳香族ポリエステル
共重合体もしくはその混和物に対して、本発明の
目的をそこなわない範囲で、酸化防止剤および熱
安定剤、紫外線吸収剤、滑剤、離型剤、染料、顔
料などの着色剤など、通常の添加剤を１種以上添
加することができる。 In addition, antioxidants, heat stabilizers, ultraviolet absorbers, lubricants, and mold release agents may be added to the aromatic polyester copolymer or its mixture used in the present invention, to the extent that the purpose of the present invention is not impaired. One or more conventional additives can be added, such as colorants such as dyes, pigments, etc.
作 用
本発明は熱可塑性樹脂として該芳香族ポリエス
テル共重合体を使用してアクリル樹脂製人工歯を
内蔵する石膏型内へ、射出成形もしくは圧縮成形
等で溶融した熱可塑性樹脂を成形もしくは賦形さ
せた後、石膏型を破砕して得られた義歯床は、ア
クリル樹脂製人工歯に何ら維持装置や接着剤が施
こされていなくても、アクリル樹脂製人工歯と高
い接着性を示し、また、補修に用いるアクリルモ
ノマー液を接触させても何らクラツクを発生しな
い。Function The present invention uses the aromatic polyester copolymer as a thermoplastic resin, and molds or shapes the molten thermoplastic resin by injection molding or compression molding into a plaster mold containing an acrylic resin artificial tooth. After that, the denture base obtained by crushing the plaster mold shows high adhesion to the acrylic resin artificial tooth even if no retainer or adhesive is applied to the acrylic resin artificial tooth. Furthermore, no cracks occur even when the acrylic monomer liquid used for repair comes into contact with it.
以下、実施例により本発明を具体的に説明する
が、これは好適な態様の例示であつて、本発明は
実施例の範囲に限定されるものではない。 Hereinafter, the present invention will be specifically explained with reference to Examples, but these are merely exemplifications of preferred embodiments, and the present invention is not limited to the scope of the Examples.
実施例 １
日本工業規格JIS Ｔ−6511に記載された人工歯
破折試験法に従い、第１図のとおり、アクリル樹
脂製人工歯（商品名ジーシーアクリリツクレジン
前歯）１を、切端部１′と前頚部１″を結ぶ線がパ
ラフインワツクス原型と45゜の角度となるように
パラフインワツクス原型に植付け、フラスコ内に
石こう埋没後、流蝋し、石こう型を形成させた。Example 1 According to the artificial tooth fracture test method described in the Japanese Industrial Standard JIS T-6511, as shown in Fig. 1, an acrylic resin artificial tooth (trade name: GC Acrylic Resin Front Teeth) 1 was separated from the incisal end 1'. It was planted in a paraffin wax model so that the line connecting 1'' of the anterior neck was at a 45° angle with the paraffin wax model, and after burying the plaster in a flask, it was waxed and a plaster mold was formed.
この石こう型を射出成形機に取りつけ、シリン
ダー温度360℃、射出圧力1500Kg／cm2、射出速度
250mm／秒（成形機：住友−ネスタールP40／25）
の条件で、歯肉様に着色された芳香族ポリエステ
ル共重合体（テレフタル酸ジクロリド／イソフタ
ル酸ジクロリツドの比が１：１の混合酸クロリド
の塩化メチレン溶液とビスフエノールＡのアルカ
リ水溶液とより界面重合法により得られ、フエノ
ール／テトラクロロエタン（６：４重量比）中の
対数粘度が0.62のもの）の溶融樹脂をフラスコ内
へ射出注入した。 This plaster mold was installed in an injection molding machine at a cylinder temperature of 360℃, an injection pressure of 1500Kg/cm 2 , and an injection speed.
250mm/sec (molding machine: Sumitomo-Nestal P40/25)
Under these conditions, an aromatic polyester copolymer colored like gums (interfacial polymerization method using a methylene chloride solution of mixed acid chloride with a ratio of terephthalic acid dichloride/isophthalic acid dichloride of 1:1 and an alkaline aqueous solution of bisphenol A) A molten resin obtained by the method (with a logarithmic viscosity of 0.62 in phenol/tetrachloroethane (6:4 weight ratio)) was injected into a flask.
冷却後、フラスコを分割し、人工歯破折試験用
成形品をとり出した。 After cooling, the flask was divided and molded articles for artificial tooth fracture testing were taken out.
第１図のごとく樹脂床部２を保持具３で固定
し、他方の人工歯切端部１′を所定金具４を介し
て、負荷速度12Kgｆ／分で破折試験を行つた。 As shown in FIG. 1, the resin bed portion 2 was fixed with a holder 3, and the other artificial tooth end portion 1' was subjected to a fracture test with a predetermined metal fitting 4 at a loading rate of 12 kgf/min.
破折強度は25Kgｆであり、実用上問題のない十
分に高い値を示した。 The fracture strength was 25 Kgf, a sufficiently high value that poses no problem in practical use.
比較例 １
実施例１で用いた芳香族ポリエステル共重合体
のかわりに、ポリサルホン（UCC製Udel
P1700）を用いる以外は実施例１と同様に成形
し、人工歯破折試験を行つた。Comparative Example 1 Instead of the aromatic polyester copolymer used in Example 1, polysulfone (UCC's Udel
P1700) was used in the same manner as in Example 1, and an artificial tooth fracture test was conducted.
破折強度は７Kgｆしかなく実用上問題となる低
い値しか示さなかつた。 The fracture strength was only 7 kgf, a low value that would pose a practical problem.
実施例 ２
アクリル樹脂製人工歯（商品名ジーシーアクリ
リツクレジン前歯および臼歯）が植えられた義歯
床ワツクス模型の埋没されたフラスコを加熱し、
ワツクスを軟化流ろうし、石こう型を形成させ
た。Example 2 A flask in which a denture base wax model in which acrylic resin artificial teeth (trade name: GC Acrylic Resin anterior teeth and molars) was implanted was heated,
The wax was softened and flowed to form a plaster mold.
石こう型を射出成形機にとりつけシリンダー温
度360℃、射出圧力1300Kg／cm2、射出速度200mm／
秒（成形機：住友ネスタールP40／25）の条件
で、歯肉様に着色された実施例１で用いたのと同
様の芳香族ポリエステル共重合体の溶融樹脂をフ
ラスコ内へ射出注入した。 Attach the plaster mold to an injection molding machine, cylinder temperature 360℃, injection pressure 1300Kg/cm 2 , injection speed 200mm/
A molten resin of an aromatic polyester copolymer similar to that used in Example 1, which was colored like gums, was injected into the flask under conditions of 10 seconds (molding machine: Sumitomo Nestal P40/25).
冷却後フラスコを分割し、義歯床をとり出し
た。人工歯を強く押しても容易にはずれず人工歯
が強固に植えられた義歯床が得られた。 After cooling, the flask was divided and the denture base was taken out. A denture base was obtained in which the artificial tooth was firmly planted without easily coming off even when the artificial tooth was strongly pressed.
該義歯床に、さらに従来のアクリル樹脂製義歯
床の補修用に使用されているアクリルモノマーな
どを含む義歯補修用即時重合レジン（商品名ジー
シーレペアジン）を接触させ常法に従がい、筆積
法により、該芳香族ポリエステル製義歯床上に肉
盛りをしたが、クラツク等の異常が認められず、
該義歯補修用即時重合レジンの使用が可能である
ことが確認された。 The denture base was further brought into contact with an instant polymerization resin for denture repair (trade name: GC Repairasin) containing acrylic monomers, etc., which is used for repairing conventional acrylic resin denture bases, and then applied with a brush according to a conventional method. We built up the material on the aromatic polyester denture base using the stacking method, but no abnormalities such as cracks were observed.
It was confirmed that the instant polymerization resin for denture repair can be used.
比較例 ２
実施例２で用いた芳香族ポリエステル共重合体
のかわりにポリサルホン（UCC製Udel
P1700）
を用いる以外は実施例２と同様に成形し、義歯床
を得たが、人工歯は軽く押しただけで義歯床から
はずれた。Comparative Example 2 Polysulfone (Udel P1700 manufactured by UCC) was used instead of the aromatic polyester copolymer used in Example 2.
A denture base was obtained by molding in the same manner as in Example 2, except that the artificial tooth was pressed lightly, but the artificial tooth was removed from the denture base with just a slight push.
また、ポリサルホン製義歯床に実施例２で用い
た義歯補修用即時重合レジンを同様の筆積で肉盛
りをしたところ、義歯床にクラツクの発生が認め
られた。 Furthermore, when the immediate polymerization resin for denture repair used in Example 2 was applied to a polysulfone denture base in the same manner, cracks were observed in the denture base.
実施例 ３
アクリル樹脂製人工歯（商品名ジーシーアクリ
リツクレジン前歯および臼歯）が植えられた義歯
床ワツクス模型の埋没されたフラスコを加熱し、
ワツクスを軟化、流ろうさせた後、実施例１で用
いた芳香族ポリエステルとポリカーボネート（三
菱ガス化学製S2000）を７：３の割合でブレンド
した混和物の歯肉様に着色されたＵ字型成形品
（歯槽堤に相当する大きさを有するＵ字型）を下
部フラスコ内の石こう型上に位置させ、320℃の
熱風を吹きつけることにより、該成形品を軟化さ
せた。十分軟化したところで、上下フラスコを合
わせて圧縮成形を行ない、その後自然冷却させ
た。Example 3 A flask in which a wax model of a denture base in which artificial teeth made of acrylic resin (trade name: GC Acrylic Resin anterior teeth and molar teeth) was implanted was heated,
After softening and flowing the wax, a U-shaped molding colored like gums was made of a mixture of the aromatic polyester used in Example 1 and polycarbonate (Mitsubishi Gas Chemical S2000) blended at a ratio of 7:3. The molded product (U-shaped with a size corresponding to the alveolar ridge) was placed on the plaster mold in the lower flask, and the molded product was softened by blowing hot air at 320°C. When the mixture was sufficiently softened, the upper and lower flasks were combined and compression molded, followed by natural cooling.
冷却後、上下フラスコを分割し、義歯床をとり
出した。 After cooling, the upper and lower flasks were separated and the denture base was taken out.
人工歯を強く押しても容易にはずれず人工歯が
強固に植えられた義歯床が得られた。 A denture base was obtained in which the artificial tooth was firmly planted without easily coming off even when the artificial tooth was strongly pressed.
また、実施例２と同様義歯補修用即時重合レジ
ンを接触させたがクラツク等の異常は認められな
かつた。 Further, as in Example 2, an instant polymerization resin for denture repair was brought into contact with the denture, but no abnormalities such as cracks were observed.
比較例 ３
実施例３で用いた芳香族ポリエステル共重合体
とポリカーボネートの混和物のかわりにポリサル
ホンを用いて、熱風の温度を340℃とする以外は、
実施例３と同様にして義歯床を得た。Comparative Example 3 Except for using polysulfone instead of the mixture of aromatic polyester copolymer and polycarbonate used in Example 3, and setting the temperature of the hot air to 340°C.
A denture base was obtained in the same manner as in Example 3.
人工歯は軽く押しただけで義歯床からはずれ、
また実施例３で用いた義歯補修用即時重合レジン
を同様の筆積で肉盛りをしたところ、義歯床にク
ラツクの発生が認められた。 The artificial tooth will come off the denture base with just a light push,
Furthermore, when the immediate polymerization resin for denture repair used in Example 3 was applied in a similar manner, cracks were observed on the denture base.
発明の効果
以上に述べた様に、本発明は義歯床形空洞を囲
繞する石膏型により熱可塑性耐熱樹脂を成形し、
石膏型を破砕して得られる樹脂製義歯床におい
て、熱可塑性樹脂として、芳香族ポリエステル共
重合体もしくはその混和物を用いることによつ
て、アクリル樹脂製人工歯との接着性が良好で、
従来のアクリル樹脂製義歯床補修用に用いられる
即時重合レジンの使用が可能となるという効果が
得られたのである。Effects of the Invention As described above, the present invention molds a thermoplastic heat-resistant resin using a plaster mold surrounding a denture base-shaped cavity.
In the resin denture base obtained by crushing the plaster mold, by using an aromatic polyester copolymer or a mixture thereof as the thermoplastic resin, it has good adhesion with the acrylic resin artificial tooth,
This has the effect of making it possible to use instant polymerization resin, which is used for repairing conventional acrylic resin denture bases.
第１図は、人工歯破折試験の実施態様を示す側
面図である。
１…人工歯、１′…人工歯の切端部、１″…人工
歯の歯頚部、２…樹脂床部、３…保持具、４…人
工歯引張り用金具。
FIG. 1 is a side view showing an embodiment of an artificial tooth fracture test. DESCRIPTION OF SYMBOLS 1... Artificial tooth, 1'... Incisal end of artificial tooth, 1''... Neck part of artificial tooth, 2... Resin base part, 3... Holder, 4... Artificial tooth tensioning fitting.
Claims (1)
性耐熱樹脂を射出成形法、押出成形法、トランス
フアー成形法又は圧縮成形法等で成形し、石膏型
を破砕して得られる樹脂製義歯床において、前記
熱可塑性耐熱樹脂がテレフタル酸とイソフタル酸
またはこれらの機能誘導体の混合物（ただしテレ
フタル酸基とイソフタル酸基のモル比は９：１乃
至１：９）および２，２−ビス（4′−ヒドロキシ
フエニル）プロパンとから得られる芳香族ポリエ
ステル共重合体、またはこれとポリカーボネート
からなる混合物である樹脂製義歯床。1. In a resin denture base obtained by molding thermoplastic heat-resistant resin by injection molding, extrusion molding, transfer molding, compression molding, etc. using a plaster mold surrounding a denture base-shaped cavity, and crushing the plaster mold. , the thermoplastic heat-resistant resin is a mixture of terephthalic acid and isophthalic acid or functional derivatives thereof (however, the molar ratio of terephthalic acid groups and isophthalic acid groups is 9:1 to 1:9) and 2,2-bis(4'- A resin denture base made of an aromatic polyester copolymer obtained from (hydroxyphenyl)propane, or a mixture of this and polycarbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59173485A JPS6150560A (en) | 1984-08-21 | 1984-08-21 | Resin denture bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59173485A JPS6150560A (en) | 1984-08-21 | 1984-08-21 | Resin denture bed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6150560A JPS6150560A (en) | 1986-03-12 |
| JPH0333122B2 true JPH0333122B2 (en) | 1991-05-16 |
Family
ID=15961374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59173485A Granted JPS6150560A (en) | 1984-08-21 | 1984-08-21 | Resin denture bed |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6150560A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2748417B2 (en) * | 1988-07-30 | 1998-05-06 | ソニー株式会社 | Microphone device |
| JP6996053B2 (en) * | 2015-11-26 | 2022-01-17 | 三井化学株式会社 | Manufacturing method of denture with floor |
-
1984
- 1984-08-21 JP JP59173485A patent/JPS6150560A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6150560A (en) | 1986-03-12 |
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