JP3040646B2 - Denture base material - Google Patents
Denture base materialInfo
- Publication number
- JP3040646B2 JP3040646B2 JP29086593A JP29086593A JP3040646B2 JP 3040646 B2 JP3040646 B2 JP 3040646B2 JP 29086593 A JP29086593 A JP 29086593A JP 29086593 A JP29086593 A JP 29086593A JP 3040646 B2 JP3040646 B2 JP 3040646B2
- Authority
- JP
- Japan
- Prior art keywords
- polycarbonate resin
- denture base
- base material
- denture
- resin
- 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
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- Dental Preparations (AREA)
- Dental Prosthetics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、強い機械的性質と良好
な表面光沢を示す、ポリカーボネート樹脂床義歯をつく
るための、義歯床用材料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a denture base material for producing a polycarbonate resin denture having strong mechanical properties and good surface gloss.
【０００２】[0002]
【従来の技術とその問題点】歯牙の欠損が多い場合、咀
嚼能力の向上や審美性の回復を目的として、レジン床義
歯による補綴治療が一般に行われている。レジン床用材
料として、アクリル系材料が４半世紀以上も使われ、現
在もレジン床用材料の主流として使われている。しか
し、近年アクリル系樹脂床義歯の欠点である衝撃に対す
る弱さを改善するために、より機械的特性に優れたプラ
スチックを歯科へ導入する検討がなされ、ポリカーボネ
ート樹脂などの材料が臨床で使用されるようになった。2. Description of the Related Art When there are many tooth defects, prosthetic treatment with resin dentures is generally performed for the purpose of improving mastication ability and restoring esthetics. Acrylic materials have been used as resin flooring materials for more than a quarter of a century, and are still being used as the mainstream of resin flooring materials. However, in recent years, in order to improve the weakness against impact, which is a drawback of acrylic resin dentures, it has been studied to introduce plastics having more excellent mechanical properties to dentistry, and materials such as polycarbonate resin are used clinically. It became so.
【０００３】ポリカーボネート樹脂の耐衝撃強さは、ア
クリル系材料の８倍以上であるが、引張り強さや曲げ強
さなどはアクリル系材料とほぼ同等であり、咬合による
撓み性能（曲げ弾性率）はアクリル系材料に劣ってい
る。このため、ポリカーボネート樹脂の義歯床用材料で
はポリカーボネート樹脂に約１０％のガラス繊維を添加
して、各種機械的強さの改良を行っている。樹脂の機械
的強さを改良するガラス繊維は、アスペクト比で３０以
上が必要であるため、義歯床用のポリカーボネート樹脂
では、ガラス繊維径が約１０μｍ、ガラス繊維長が約３
００〜５００μｍ（アスペクト比３０〜５０）が使用さ
れている。[0003] The impact resistance of a polycarbonate resin is at least eight times that of an acrylic material, but its tensile strength and bending strength are almost the same as those of an acrylic material. Inferior to acrylic materials. For this reason, in the denture base material of the polycarbonate resin, about 10% of glass fiber is added to the polycarbonate resin to improve various mechanical strengths. Since the glass fiber for improving the mechanical strength of the resin must have an aspect ratio of 30 or more, a polycarbonate resin for a denture base has a glass fiber diameter of about 10 μm and a glass fiber length of about 3 μm.
00 to 500 μm (aspect ratio 30 to 50) is used.
【０００４】そのため、義歯製作の最終工程である仕上
げ研磨を行ったときに、義歯床の表面に肉眼で判別可能
なガラス繊維が露出したり、ガラス繊維に起因する表面
の波模様が観察される。その結果として、仕上げ研磨終
了後も義歯床に鏡面のような光沢が得られず、審美的に
不満足なポリカーボネート樹脂床義歯ができあがる。[0004] For this reason, when the final polishing, which is the final step in the manufacture of the denture, is performed, glass fibers that can be discerned by the naked eye are exposed on the surface of the denture base, and a wave pattern on the surface due to the glass fibers is observed. . As a result, even after finishing polishing, the denture base does not have gloss like a mirror surface, and an aesthetically unsatisfactory polycarbonate resin base denture is completed.
【０００５】[0005]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、強い機械的性質と良好な表面光沢を示す、
ポリカーボネート樹脂床義歯をつくるための、義歯床用
材料を提供することである。The problem to be solved by the present invention is to exhibit strong mechanical properties and good surface gloss,
An object of the present invention is to provide a denture base material for making a polycarbonate resin denture.
【０００６】[0006]
【課題を解決するための手段】本発明は、ポリカーボネ
ート樹脂に強化繊維として義歯の最終研磨工程で、強化
繊維が義歯床の表面に露出しても口腔粘膜を傷つけるこ
とがなく、表面が滑らかで鏡面光沢が得られ、且つ義歯
床に必要な透明性が確保できるホウ酸アルミウィスカー
を添加したことを特徴とした義歯床用のポリカーボネー
ト樹脂に関するものである。SUMMARY OF THE INVENTION The present invention is directed to a final polishing step of a denture as a reinforcing fiber in a polycarbonate resin, which does not damage the oral mucosa even if the reinforcing fiber is exposed on the surface of the denture base, and has a smooth surface. The present invention relates to a polycarbonate resin for a denture base, which is characterized by adding an aluminum borate whisker capable of obtaining a specular gloss and securing necessary transparency for a denture base.
【０００７】本発明に使用するホウ酸アルミウィスカー
繊維の径は０．５〜１．５μｍ、繊維長は５〜１００μ
ｍであり、好ましくは繊維長が１０〜３０μｍである。The diameter of the aluminum borate whisker fiber used in the present invention is 0.5 to 1.5 μm, and the fiber length is 5 to 100 μm.
m, and preferably the fiber length is 10 to 30 μm.
【０００８】更に、ポリカーボネート樹脂に対するホウ
酸アルミウィスカーの添加量は、機械的な特性をあげる
ためには５重量％以上が必要であるが、３０重量％を越
えた場合は耐衝撃強さが低下するため好ましくは、１０
〜１５重量％である。Further, the addition amount of aluminum borate whisker to the polycarbonate resin is required to be 5% by weight or more in order to improve the mechanical properties, but if it exceeds 30% by weight, the impact strength decreases. Preferably 10
１５15% by weight.
【０００９】[0009]
【本発明の効果】本発明によれば、強い機械的性質と良
好な表面光沢を示す、ポリカーボネート樹脂床義歯をつ
くるための、良好な義歯床用材料を提供することができ
る。According to the present invention, it is possible to provide a good denture base material for producing a polycarbonate resin denture having strong mechanical properties and good surface gloss.
【００１０】[0010]
【実施例】次に実施例および比較例によって本発明を更
に具体的に説明する。Next, the present invention will be described more specifically with reference to examples and comparative examples.
【００１１】実施例１〜４ 実施例として、ポリカーボネート樹脂に繊維径約１μ
ｍ、繊維長２０μｍのホウ酸アルミウィスカーを５、１
０、１５及び２０重量％添加し（実施例１、２、３及び
４に対応する）、射出成形で試験片を作製し、それぞれ
を日本工業規格（JIS D 250，JIS D 638，JIS D
790）に従って測定した結果を表１に示す。Examples 1 to 4 As an example, a fiber diameter of about 1 μm was added to a polycarbonate resin.
m, an aluminum borate whisker with a fiber length of 20 μm
0, 15 and 20% by weight were added (corresponding to Examples 1, 2, 3 and 4), and test pieces were prepared by injection molding, each of which was subjected to Japanese Industrial Standards (JIS D 250, JIS D 638, JIS D
Table 1 shows the results measured in accordance with 790).
【００１２】[0012]
【表１】 [Table 1]
【００１３】比較例１〜３ 比較例１はポリカーボネート樹脂のみ、比較例２はポリ
カーボネート樹脂に繊維径が約１０μｍで繊維長が約３
００〜５００μｍのガラス繊維を１０重量％添加したも
のを実施例１と同様に射出成形し、比較例３は歯科用ア
クリル樹脂を歯科の通法に従って熱湯中で３０分加熱重
合して試料を作製して、実施例と同じ方法で機械的強さ
を測定した。Comparative Examples 1 to 3 In Comparative Example 1, only the polycarbonate resin was used. In Comparative Example 2, the polycarbonate resin had a fiber diameter of about 10 μm and a fiber length of about 3 μm.
A sample to which 10% by weight of glass fiber of 00 to 500 μm was added was injection-molded in the same manner as in Example 1. In Comparative Example 3, a sample was prepared by heating and polymerizing a dental acrylic resin in hot water for 30 minutes in accordance with common dental procedures. Then, the mechanical strength was measured in the same manner as in the examples.
【００１４】結果を表２に示す。The results are shown in Table 2.
【００１５】[0015]
【表２】 [Table 2]
【００１６】実施例１〜４の結果は、歯科用アクリル樹
脂の機械的強さを全て上回っており、また実施例２と４
では現有の義歯床用ポリカーボネート樹脂と同等の機械
的強さを示し、ホウ酸アルミウィスカーの添加がポリカ
ーボネート樹脂義歯床用材料の機械的強さの向上に有効
であった。The results of Examples 1 to 4 all exceed the mechanical strength of the dental acrylic resin, and the results of Examples 2 and 4
Showed the same mechanical strength as the existing denture base polycarbonate resin, and the addition of aluminum borate whisker was effective in improving the mechanical strength of the polycarbonate resin denture base material.
【００１７】実施例５ 実施例２の組成物、ポリカーボネート樹脂／ホウ酸アル
ミウィスカー＝９０／１０（重量比）を射出成形で１０
×１０×３（ｍｍ）の板にし、耐水研磨紙＃１８０で表
面を荒らした後、歯科用研磨材のビッグポイントおよび
ルージュをつけたバフを使用して、中研磨と仕上げ研磨
を行った。Example 5 The composition of Example 2, polycarbonate resin / aluminum borate whisker = 90/10 (weight ratio) was subjected to injection molding to give 10
After forming a plate of × 10 × 3 (mm) and roughening the surface with water-resistant abrasive paper # 180, medium polishing and finish polishing were performed using a buff with a big point and a rouge of a dental abrasive.
【００１８】その結果、試料の表面は鏡面光沢を示す滑
らかな面になった。As a result, the surface of the sample became a smooth surface exhibiting specular gloss.
【００１９】比較例４ 比較例２の組成物、ポリカーボネート樹脂／ガラス繊維
＝９０／１０（重量比）を使用した以外は実施例５と同
様にして研磨後の表面を観察した。Comparative Example 4 The polished surface was observed in the same manner as in Example 5 except that the composition of Comparative Example 2, polycarbonate resin / glass fiber = 90/10 (weight ratio) was used.
【００２０】その結果、表面層にガラス繊維がある所と
ない所で試料の削除量が異なり、表面が小さく波うつ現
象が観察され、光沢も鈍くなった。As a result, the amount of the sample to be removed was different between a portion where the glass fiber was present on the surface layer and a portion where the glass fiber was not present.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０８Ｌ 69/00 (56)参考文献 特開 平３−251513（ＪＰ，Ａ) 特開 平２−279616（ＪＰ，Ａ) 特開 昭61−152607（ＪＰ，Ａ) 特公 昭45−16824（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) A61C 13/01 A61K 6/00 - 6/087 ──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. 7 Identification code FI C08L 69/00 (56) References JP-A-3-251513 (JP, A) JP-A-2-279616 (JP, A) JP-A-61-152607 (JP, A) JP-B-45-16824 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) A61C 13/01 A61K 6/00-6/087
Claims (1)
ィスカーを５〜３０重量％添加することを特徴とする義
歯床用材料。1. A denture base material comprising 5 to 30% by weight of aluminum borate whiskers added to a polycarbonate resin .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29086593A JP3040646B2 (en) | 1993-11-19 | 1993-11-19 | Denture base material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29086593A JP3040646B2 (en) | 1993-11-19 | 1993-11-19 | Denture base material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07138120A JPH07138120A (en) | 1995-05-30 |
| JP3040646B2 true JP3040646B2 (en) | 2000-05-15 |
Family
ID=17761502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29086593A Expired - Lifetime JP3040646B2 (en) | 1993-11-19 | 1993-11-19 | Denture base material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3040646B2 (en) |
-
1993
- 1993-11-19 JP JP29086593A patent/JP3040646B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07138120A (en) | 1995-05-30 |
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