JPH08301716A - Substitute tooth crown and its production - Google Patents
Substitute tooth crown and its productionInfo
- Publication number
- JPH08301716A JPH08301716A JP13570895A JP13570895A JPH08301716A JP H08301716 A JPH08301716 A JP H08301716A JP 13570895 A JP13570895 A JP 13570895A JP 13570895 A JP13570895 A JP 13570895A JP H08301716 A JPH08301716 A JP H08301716A
- Authority
- JP
- Japan
- Prior art keywords
- hydroxyapatite
- substitute
- resin
- producing
- dental crown
- 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.)
- Granted
Links
Landscapes
- Dental Preparations (AREA)
- Dental Prosthetics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は代用歯冠材料及びその製
法に関する。FIELD OF THE INVENTION The present invention relates to a substitute dental crown material and a method for producing the same.
【０００２】[0002]
【従来の技術】歯冠材料は、常に唾液に曝され、咬合圧
を繰り返し受ける過酷な条件下での使用を強いられるた
め、耐荷重性、耐衝撃性など機械的強度にすぐれていな
ければならない。しかも生体に対し為害性のないこと、
すなわち生体適合性にもすぐれていることが要求される
上に、天然歯との外観上の審美性が要求されている。代
用歯冠材料はこれら機械的強度、生体適合性及び審美性
の３つの要素がすべて満たさなければならず、生体用材
料の中で最も厳しい条件が課せられている。さらに最
近、現在歯科技工士の技量に依存している歯冠作成にＣ
ＡＤ／ＣＡＭなどコンピュータ制御を導入したマシニン
グシステムが提案されているが、この場合は歯科技工所
での切削加工性が必要となる。また審美面での最終仕上
げとなる色付けのし易さなど従来の歯科技工の技術が生
かされうる材料であることも必要となる。2. Description of the Related Art A crown material must be excellent in mechanical strength such as load resistance and impact resistance because it is forced to be used under severe conditions where it is constantly exposed to saliva and repeatedly subjected to occlusal pressure. . Moreover, it is not harmful to the living body,
That is, in addition to being required to have excellent biocompatibility, it is also required to have an aesthetic appearance on a natural tooth. The substitute crown material must meet all three of these mechanical strength, biocompatibility, and aesthetic properties, and is the most stringent requirement among biomaterials. More recently, C has been used to create crowns that currently depend on the skill of the dental technician.
Although a machining system introducing computer control such as AD / CAM has been proposed, in this case, cutting workability in a dental laboratory is required. In addition, it is also necessary to use a material that can utilize conventional dental technology such as ease of coloring that is the final finish on the aesthetic side.
【０００３】[0003]
【発明が解決しようとする課題】現在用いられている代
用歯冠材料はメタル、レジン、セラミックスまたは陶材
とさまざまな人工材料が用いられている。しかし、メタ
ルは審美性または色付け加工性、レジンは耐荷重性、セ
ラミックスは耐衝撃性や切削性並びに対合歯へのダメー
ジの点でそれぞれ劣っており、機械的強度、生体適合
性、審美性、切削性、色付け加工性のすべてを満足する
理想的な代用歯冠材料はまだないのが現状である。Various artificial materials such as metal, resin, ceramics or porcelain are used as the substitute dental crown materials currently used. However, metal is inferior in aesthetic or coloring workability, resin is load bearing, and ceramics are inferior in impact resistance and machinability as well as damage to the mating teeth, and mechanical strength, biocompatibility and aesthetics are poor. At present, there is no ideal substitute dental crown material that satisfies all of machinability and coloring workability.
【０００４】[0004]
【課題を解決する為の手段】本発明はハイドロキシアパ
タイトを混合することにより、口腔内で長期間歯冠とし
ての機能を果たし、耐荷重性、耐衝撃性、生体親和性、
審美性、切削性、色付け加工性、唾液との反応性等にす
ぐれた代用歯冠材料を提供することを目的とする。唾液
との反応性が代用歯冠に天然歯と同様の生理学的意義を
付与するのみならず、吸着作用により自己の天然歯と同
等の審美性を自然に形成させる効果を有する。Means for Solving the Problems The present invention, by mixing hydroxyapatite, functions as a crown for a long time in the oral cavity, and has load resistance, impact resistance, biocompatibility,
It is an object of the present invention to provide a substitute dental crown material which is excellent in aesthetics, machinability, coloring workability and reactivity with saliva. Not only does the reactivity with saliva give the substitute dental crown the same physiological significance as a natural tooth, but it also has the effect of naturally forming an aesthetic equivalent to that of its own natural tooth by an adsorption action.
【０００５】ハイドロキシアパタイトは生体に対する親
和性にすぐれていることが知られており、人工骨や経皮
端子などに臨床応用されている。また、ハイドロキシア
パタイトは唾液と反応し、唾液タンパクに対しすぐれた
吸着性があることが報告されている。天然歯のエナメル
質を構成している無機成分であるハイドロキシアパタイ
トが唾液タンパクを吸着してペリクルという薄い皮膜を
表面に形成し、歯を被覆保護していることがわかってい
る。さらにハイドロキシアパタイトが若干溶解すること
により、口腔内を弱アルカリ性に維持し、ミュータンス
菌や他の口腔内細菌の増殖を抑えることで、口腔内の健
康維持に寄与している。また、カルボキシル基をもつ有
機化合物がハイドロキシアパタイトとよく反応すること
が知られており、カルボン酸、ポリカルボン酸で前処理
することによってハイドロキシアパタイト表面を有機物
層で覆い、ハイドロキシアパタイトとレジンとのぬれ性
を改善する方法が考えられる。以下、本発明代用歯冠材
料の組成、形状及至構造、使用の態様等につき詳細に分
説する。Hydroxyapatite is known to have an excellent affinity for living bodies and is clinically applied to artificial bones, percutaneous terminals and the like. Further, it has been reported that hydroxyapatite reacts with saliva and has excellent adsorptivity for saliva proteins. It is known that hydroxyapatite, which is an inorganic component that constitutes the enamel of natural teeth, adsorbs saliva proteins and forms a thin film called pellicle on the surface to protect and protect teeth. Furthermore, by slightly dissolving the hydroxyapatite, the oral cavity is kept weakly alkaline and the growth of mutans bacteria and other oral bacteria is suppressed, which contributes to the maintenance of the oral health. In addition, it is known that organic compounds having a carboxyl group react well with hydroxyapatite, and by pretreatment with carboxylic acid or polycarboxylic acid, the surface of hydroxyapatite is covered with an organic material layer, and the wetness of hydroxyapatite and resin The method of improving sex is considered. Hereinafter, the composition, shape and structure of the dental crown material of the present invention, the mode of use, etc. will be described in detail.
【０００６】（材料組成・製法）本発明に於ける”ハイ
ドロキシアパタイト”とはその化学組成がＣａ10（ＰＯ
4）6（ＯＨ）2で表される純粋品のみならず、ＯＨイオ
ンのかわりに１〜１０％のＣＯ3イオンやフッ素、塩素
イオンを含むこともある。また、これを主成分とするの
であるが焼結性、強度、細孔度等を向上すべく、これに
Ｃａ（ＰＯ4）2、ＭｇＯ、Ｎａ2Ｏ、Ｋ2Ｏ、ＣａＦ2、
Ａｌ2Ｏ3、ＳｉＯ2、ＣａＯ、Ｆｅ2Ｏ3、ＭｎＯ2、Ｚｎ
Ｏ、Ｃ、ＳｒＯ、ＰｂＯ、ＢａＯ、ＴｉＯ2、ＺｒＯ2等
の周知の各種添加物を添加混合したものをも包含する。
上記成分をもつハイドロキシアパタイトはＣａ／Ｐモル
比が１．６６のものをさすが、カルシウム欠損アパタイ
ト、リン酸三カルシウム、リン酸四カルシウム、リン酸
八カルシウムなどのリン酸カルシウム化合物の単体もし
くはそれら二つ以上の複合体もハイドロキシアパタイト
とほぼ同等の機能を有する。上記のレジンは例えば、メ
タクリル酸エステル系樹脂またはアクリル酸エステル系
樹脂、ポリカーボネート樹脂、エポキシ系樹脂、ポリサ
ルホン樹脂、フッ素系樹脂等から選ぶことが出来る。こ
れらのレジンはまたＣ、ＳｉＣ、ＳｉＯ2、Ａｌ2Ｏ3、
ＺｒＯ2、ガラス繊維、セラミック繊維、セラミックウ
ィスカー、ＴｉＯ2、ＴｉＮ、Ｔｉ、Ｗ、Ｍｏ、ステン
レス鋼等からなる強化材料や他のフィラーを含んでいて
もよい。また、上記のカルボン酸、ポリカルボン酸はカ
ルボキシル基を有する有機化合物の総称で、乳酸、ピル
ビン酸、クエン酸、リンゴ酸、酪酸、マレイン酸、マロ
ン酸、ギ酸、酢酸、プロピオン酸などの飽和脂肪酸、ア
クリル酸、リノール酸等の不飽和脂肪酸などがある。ま
た、それらの塩またはエステルを用いても良い。さらに
シランカップリング剤と混合して用いることもできる。
ハイドロキシアパタイトの粒子径は、５μｍ以下が好ま
しく、０．１μｍ〜１μｍがより好ましい。(Material composition / manufacturing method) "Hydroxyapatite" in the present invention has a chemical composition of Ca 10 (PO 4
4 ) Not only a pure product represented by 6 (OH) 2 , but may contain 1 to 10% of CO 3 ions, fluorine, or chlorine ions instead of OH ions. Further, although it contains this as a main component, in order to improve sinterability, strength, porosity, etc., Ca (PO 4 ) 2 , MgO, Na 2 O, K 2 O, CaF 2 ,
Al 2 O 3 , SiO 2 , CaO, Fe 2 O 3 , MnO 2 , Zn
It also includes a mixture of various well-known additives such as O, C, SrO, PbO, BaO, TiO 2 , and ZrO 2 .
The hydroxyapatite having the above components refers to one having a Ca / P molar ratio of 1.66, but calcium phosphate-deficient apatite, calcium phosphate compounds such as tricalcium phosphate, tetracalcium phosphate, octacalcium phosphate, etc., or two or more thereof. Also has a function almost equivalent to that of hydroxyapatite. The resin can be selected from, for example, methacrylic acid ester-based resins or acrylic acid ester-based resins, polycarbonate resins, epoxy-based resins, polysulfone resins, fluorine-based resins, and the like. These resins also include C, SiC, SiO 2 , Al 2 O 3 ,
It may contain a reinforcing material such as ZrO 2 , glass fiber, ceramic fiber, ceramic whiskers, TiO 2 , TiN, Ti, W, Mo, and stainless steel, or other filler. In addition, the above-mentioned carboxylic acids and polycarboxylic acids are general terms for organic compounds having a carboxyl group, and saturated fatty acids such as lactic acid, pyruvic acid, citric acid, malic acid, butyric acid, maleic acid, malonic acid, formic acid, acetic acid, and propionic acid. , Unsaturated fatty acids such as acrylic acid and linoleic acid. Moreover, you may use those salts or esters. Further, it can be used as a mixture with a silane coupling agent.
The particle size of hydroxyapatite is preferably 5 μm or less, more preferably 0.1 μm to 1 μm.
【０００７】[0007]
【実施例】以下、実施例により本発明を具体的に説明す
る。The present invention will be described below in detail with reference to examples.
【０００８】（実施例１）湿式法で合成した粒子径５μ
ｍ以下（平均１μｍ）のハイドロキシアパタイト超微粉
末を４００℃で一昼夜乾燥した後、ポリメチルメタクリ
レート樹脂に２０重量％それぞれ混合し、６０℃で約１
０時間重合した。材料は乳白色で、歯に近い色感であっ
た。この材料の圧縮強度、曲げ強度を測定したところ、
それぞれ１，２００ｋｇ／ｃｍ2、８５０ｋｇ／ｃｍ2で
あった。一方、ハイドロキシアパタイト未添加のポリメ
チルメタクリレート樹脂がそれぞれ７５０ｋｇ／ｃ
ｍ2、７００ｋｇ／ｃｍ2であり、機械的強度の向上が見
られた。小型自動切削装置で切削したところ、ポリメチ
ルメタクリレート樹脂のみと比べて樹脂特有の粘りが少
なくなり、切削性は向上した。さらに歯冠の形状に切削
し、表面の色調をととのえ、バフ研磨を施したところ歯
に近い質感を作り出すことができた。(Example 1) Particle size 5 μm synthesized by a wet method
Hydroxyapatite ultrafine powder of m or less (average 1 μm) was dried at 400 ° C. for one day and then mixed with 20% by weight of polymethylmethacrylate resin, and at 60 ° C. about 1
Polymerized for 0 hours. The material was milky white and had a color impression close to that of teeth. When the compressive strength and bending strength of this material were measured,
Each was 1,200kg / cm 2, 850kg / cm 2. On the other hand, polymethylmethacrylate resin without hydroxyapatite added was 750 kg / c each
m 2 and 700 kg / cm 2 , and improvement in mechanical strength was observed. When cut with a small automatic cutting machine, the resin-specific viscosity was reduced compared to polymethylmethacrylate resin alone, and the machinability was improved. Furthermore, when it was cut into the shape of a crown, the surface tone was improved, and buffing was applied, a texture close to a tooth could be created.
【０００９】（実施例２）湿式法で合成したハイドロキ
シアパタイト超微粉末を１，２００℃で２時間焼成した
のち、粒子径１〜５０μｍ（平均１５μｍ）に破砕した
緻密顆粒体を１０％プロピオン酸で５分間処理した後ポ
リメチルメタクリレート樹脂に３０重量％混合した。さ
らに６０℃で１０時間重合した。やや透明感のある乳白
色で、歯に近い質感であった。この材料の圧縮強度、曲
げ強度を測定したところ、それぞれ１，５００ｋｇ／ｃ
ｍ2、９５０ｋｇ／ｃｍ2と機械的強度が大きく向上し
た。これを小型自動切削装置で切削したところ、ポリメ
チルメタクリレート樹脂のみと比べて樹脂特有の粘りが
少なくなり、切 削性の向上が見られた。さらに歯冠の
形状に切削し、バフ研磨を施した後歯科用接着剤を用い
て歯根上部に装着したところ、唾液に濡れた代用歯冠は
審美性にすぐれていた。(Example 2) Hydroxyapatite ultrafine powder synthesized by a wet method was calcined at 1,200 ° C for 2 hours, and then crushed to a particle size of 1 to 50 µm (average 15 µm) to obtain 10% propionic acid. After being treated for 5 minutes, it was mixed with a polymethylmethacrylate resin in an amount of 30% by weight. Further, polymerization was carried out at 60 ° C. for 10 hours. It had a slightly transparent milky white color and had a texture close to that of teeth. When the compressive strength and bending strength of this material were measured, each was 1,500 kg / c
The mechanical strength was greatly improved to m 2 , 950 kg / cm 2 . When this was cut with a small automatic cutting machine, the resin-specific viscosity was reduced compared to the polymethylmethacrylate resin alone, and the machinability was improved. Furthermore, after cutting into a crown shape and buffing, it was mounted on the upper part of the root using a dental adhesive, and the saliva-substitute crown was excellent in aesthetics.
【００１０】[0010]
【発明の効果】硬質レジンにハイドロキシアパタイト超
微粉体または緻密顆粒体を混合した歯冠材料を用いるこ
とにより、耐荷重性、耐衝撃性、生体親和性、審美性、
切削性、色付け加工性、唾液との反応性等にすぐれた理
想的な代用歯冠が提供でき、大変有用である。EFFECTS OF THE INVENTION By using a dental crown material in which a hydroxyapatite ultrafine powder or a dense granule is mixed with a hard resin, load resistance, impact resistance, biocompatibility, aesthetics,
It is very useful because it can provide an ideal dental crown with excellent machinability, colorability, saliva reactivity, etc.
Claims (11)
物より成ることを特徴とする代用歯冠。1. A substitute crown comprising a mixture of hydroxyapatite and a resin.
を混合した後、硬化成形することを特徴とする代用歯冠
の製造方法。2. A method for producing a substitute dental crown, which comprises mixing hydroxyapatite ultrafine powder with a resin and then hardening and molding the mixture.
はＣａとＰのモル比が１．５乃至２．０であることを更
に特徴とする請求項１、２に記載の代用歯冠及びその製
法。3. The substitute dental crown according to claim 1, wherein the hydroxyapatite mixed in the resin has a molar ratio of Ca and P of 1.5 to 2.0, and a method for producing the same.
は８００℃未満において焼成されることを更に特徴とす
る超微粉体である請求項１、２に記載の代用歯冠及びそ
の製法。4. The substitute dental crown according to claim 1, and the method for producing the same, wherein the hydroxyapatite mixed in the resin is an ultrafine powder, which is further characterized by being fired at a temperature lower than 800 ° C.
は８００℃以上において焼成されることを更に特徴とす
る顆粒体である請求項１、２に記載の代用歯冠及びその
製法。5. A dental crown substitute and a method for producing the same according to claim 1, wherein the hydroxyapatite mixed in the resin is a granule characterized by being baked at 800 ° C. or higher.
は充填量７５重量％以下であることを更に特徴とする請
求項１、２に記載の代用歯冠及びその製法。6. The substitute dental crown according to claim 1, further comprising a hydroxyapatite mixed in the resin in an amount of 75% by weight or less, and a method for producing the same.
超微粉体は粒子径５μｍ以下であることを更に特徴とす
る請求項１、２に記載の代用歯冠及びその製法。7. The substitute dental crown and the method for producing the same according to claim 1, wherein the hydroxyapatite ultrafine powder mixed in the resin has a particle diameter of 5 μm or less.
顆粒体は相対密度７５％以上の緻密体であることを更に
特徴とする請求項１、２に記載の代用歯冠及びその製
法。8. The substitute dental crown and the method for producing the same according to claim 1, wherein the hydroxyapatite granules mixed in the resin are dense bodies having a relative density of 75% or more.
顆粒体は粒子径１乃至５００μｍの破砕体であることを
更に特徴とする請求項１、２に記載の代用歯冠及びその
製法。9. The substitute dental crown according to claim 1, and the method for producing the same, wherein the hydroxyapatite granules mixed in the resin are crushed bodies having a particle diameter of 1 to 500 μm.
ト顆粒体は粒子径１乃至５００μｍの針状体もしくは線
維状体であることを更に特徴とする請求項１、２に記載
の代用歯冠及びその製法。10. A dental crown substitute and a method for producing the same according to claim 1, wherein the hydroxyapatite granules mixed in the resin are needle-like bodies or fibrous bodies having a particle diameter of 1 to 500 μm.
顆粒体は、カルボン酸またはポリカルボン酸またはこれ
らの塩で前処理を行うことを更に特徴とする請求項１、
２に記載の代用歯冠及びその製法。11. The hydroxyapatite ultrafine powder or granules are further pretreated with a carboxylic acid, a polycarboxylic acid or a salt thereof, according to claim 1,
The substitute crown according to 2 and a method for producing the same.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13570895A JP4011129B2 (en) | 1995-05-10 | 1995-05-10 | How to make a substitute crown |
| EP96913712A EP0824920A1 (en) | 1995-05-10 | 1996-05-09 | Blood vessel substitute, tooth crown substitute, and process for producing the same |
| CA002220486A CA2220486A1 (en) | 1995-05-10 | 1996-05-09 | Blood vessel substitute, crown substitute, and processes for production of the same |
| PCT/JP1996/001230 WO1996035461A1 (en) | 1995-05-10 | 1996-05-09 | Blood vessel substitute, tooth crown substitute, and process for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13570895A JP4011129B2 (en) | 1995-05-10 | 1995-05-10 | How to make a substitute crown |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08301716A true JPH08301716A (en) | 1996-11-19 |
| JP4011129B2 JP4011129B2 (en) | 2007-11-21 |
Family
ID=15158034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13570895A Expired - Fee Related JP4011129B2 (en) | 1995-05-10 | 1995-05-10 | How to make a substitute crown |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4011129B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009504264A (en) * | 2005-08-10 | 2009-02-05 | デンツプライ インターナショナル インコーポレーテッド | Method for manufacturing a chair side dental crown |
| JP6427717B1 (en) * | 2017-06-22 | 2018-11-21 | ポリマーアソシエイツ合同会社 | Resin composition for cutting, resin molded article for cutting and method for producing the same |
-
1995
- 1995-05-10 JP JP13570895A patent/JP4011129B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009504264A (en) * | 2005-08-10 | 2009-02-05 | デンツプライ インターナショナル インコーポレーテッド | Method for manufacturing a chair side dental crown |
| JP6427717B1 (en) * | 2017-06-22 | 2018-11-21 | ポリマーアソシエイツ合同会社 | Resin composition for cutting, resin molded article for cutting and method for producing the same |
| WO2018235218A1 (en) * | 2017-06-22 | 2018-12-27 | ポリマーアソシエイツ合同会社 | Resin composition for cutting, resin molded body for cutting, and method for manufacturing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4011129B2 (en) | 2007-11-21 |
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