JPS63176335A - Crystallized glass and production thereof - Google Patents
Crystallized glass and production thereofInfo
- Publication number
- JPS63176335A JPS63176335A JP686787A JP686787A JPS63176335A JP S63176335 A JPS63176335 A JP S63176335A JP 686787 A JP686787 A JP 686787A JP 686787 A JP686787 A JP 686787A JP S63176335 A JPS63176335 A JP S63176335A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- mold
- crystallized glass
- crystallized
- crystals
- 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
Links
- 239000011521 glass Substances 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000013078 crystal Substances 0.000 claims abstract description 25
- 229910052586 apatite Inorganic materials 0.000 claims abstract description 14
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000005191 phase separation Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 10
- 238000005266 casting Methods 0.000 abstract description 9
- 238000000465 moulding Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 229910052681 coesite Inorganic materials 0.000 abstract description 5
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 5
- 239000000377 silicon dioxide Substances 0.000 abstract description 5
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 5
- 229910052682 stishovite Inorganic materials 0.000 abstract description 5
- 229910052905 tridymite Inorganic materials 0.000 abstract description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract description 4
- 229910001634 calcium fluoride Inorganic materials 0.000 abstract description 4
- 210000000332 tooth crown Anatomy 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 230000003796 beauty Effects 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 239000007791 liquid phase Substances 0.000 abstract 1
- 239000012071 phase Substances 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 12
- 210000000214 mouth Anatomy 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 239000001993 wax Substances 0.000 description 5
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 4
- 229910052573 porcelain Inorganic materials 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000010970 precious metal Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000004031 devitrification Methods 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910000497 Amalgam Inorganic materials 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- -1 Nd oxides Chemical class 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000006103 coloring component Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000010434 nepheline Substances 0.000 description 1
- 229910052664 nepheline Inorganic materials 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- NOTVAPJNGZMVSD-UHFFFAOYSA-N potassium monoxide Inorganic materials [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 229910000500 β-quartz Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は人工歯冠として有用な結晶化ガラス及びその製
造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a crystallized glass useful as an artificial dental crown and a method for producing the same.
［従来波なとその問題点］
従来より一般に人工歯冠ヒして用いられている材料とし
ては、アマルガム銀合金、貴金属、準貴金属、非貴金属
等の金属や台金、陶材、メタルボンドと呼ばれる金属と
陶材との複合体が存在するが各々一長一短がある。すな
、ｂち、金属や合金は鋳造成形によって高精度の形状に
成形出来るがその外観が生体歯牙と著しく異なり、しか
も金属によ・っては有害イオンを溶出するため口腔内で
の安定性に欠けている。また陶材及びメタルボンドは、
生体歯牙と調和した外観が得られ、口腔内での安定性も
良いが、製作するのに陶材粉末の盛付、焼成、形態修正
といった繁雑な工程が必要である。[Conventional materials and their problems] Materials commonly used for artificial dental crowns include metals such as amalgam silver alloys, precious metals, semi-precious metals, and non-precious metals, base metals, porcelain materials, and metal bonds. There are so-called composite materials of metal and porcelain, each with their own advantages and disadvantages. Metals and alloys can be molded into highly precise shapes by casting, but their appearance is markedly different from that of living teeth, and some metals elute harmful ions, making them less stable in the oral cavity. is lacking. In addition, porcelain and metal bond are
Although it has an appearance that is in harmony with living teeth and has good stability in the oral cavity, it requires complicated steps to manufacture, such as applying porcelain powder, firing, and modifying the shape.
近年上記事情から生体親和性に優れており口腔内での安
定性が良い結晶化ガラスが各種提案されているが、これ
らの結晶化ガラスのほとんどは、ガラスを微粉砕し、そ
の粉末を成形後焼結させさらに加熱処理するといった繁
雑な工程によって製造され、またこのような製造方法で
は人工歯冠のような複雑形状のものを成形するのは困難
であり、成形後切削加工する必要が生じ、そのため欠け
が生じやすくなる。さらに上記結晶化ガラス以外にも核
形成剤としてＴｉＯ２やＺｒＯ２を含有し鋳造成形が可
能な結晶化ガラス′があるが、結晶粒子が大きくなるな
め外観が不透明で審美性に欠けると共に化学耐久性が悪
く口腔内で不安定であるため表面が■れ、変色や異物付
着が起こりやすい等の問題点がある。In recent years, various types of crystallized glass that have excellent biocompatibility and good stability in the oral cavity have been proposed due to the above circumstances, but most of these crystallized glasses are made by finely pulverizing the glass and molding the powder. It is manufactured through a complicated process of sintering and then heat treatment, and it is difficult to mold complex shapes such as artificial tooth crowns with this manufacturing method, which requires cutting after molding. Therefore, chipping is likely to occur. Furthermore, in addition to the above-mentioned crystallized glass, there is crystallized glass that contains TiO2 and ZrO2 as nucleating agents and can be cast. Unfortunately, it is unstable in the oral cavity, resulting in problems such as surface fraying, discoloration, and foreign matter adhesion.
［発明の目的］
本発明は上記問題点に鑑みなされたもので、外観か乳白
色半透明を呈するため審美性に優れ、化学耐久性が高い
ため口腔内で安定すると共に生体親和性に優れ、まな強
度、硬度が高くさらに鋳造成形によって寸法精度よく作
製て゛きる結晶化ガラス及びその製造方法を提供するこ
とを目的とするものである。[Purpose of the Invention] The present invention has been made in view of the above-mentioned problems.It has a milky-white translucent appearance, which gives it excellent aesthetics, and has high chemical durability, which makes it stable in the oral cavity, and has excellent biocompatibility. The object of the present invention is to provide a crystallized glass that has high strength and hardness and can be manufactured with high dimensional accuracy by casting, and a method for manufacturing the same.
［発明の構成］
本発明ハ、Ｓｉｎ、−Ａｌ２Ｏ３−Ｐ２Ｏ５−ＣａＯ−
ＭｇＯ系のガラスにＢ２Ｏ３を０．００１〜５°栢、Ｃ
ａＦ２を０．１−５％添加することによって緻密な分相
構造が複（准にからみあった中にさらに微細なアパタイ
ト結晶が均一に析出した構造を有するため乳白色半透明
の外観を呈すると共に高強度で化学耐久性が良く機械加
工性に優れているため切削加工時に欠けが生じにくい結
晶化ガラスを提供するものである。すなわち、Ｂ２Ｏ３
を添加すると加熱処理することシ、：よってＳｉＯ２の
多いガラス相と、そうでないガラス相妃分離すると共に
２つのガラス相が０．１μ程度の大きさで網目状にがら
みあった打ｌ造になり、この結果分相ガラス特有の乳白
色半透明の外観を呈し、審美性に優れた結晶化ガラスが
得られる。またＣａＦ２を添加すると分相の界面がら低
温の加熱処理によって微細なアパタイト結晶が多数析出
する効果があると共に析出したアパタイト結晶が他のリ
ン酸；ウルシラム結晶に転移すると強度が低くなるため
それを防ぐという効果らある。[Structure of the invention] The present invention C, Sin, -Al2O3-P2O5-CaO-
Add B2O3 to MgO glass at 0.001~5°C.
By adding 0.1-5% of aF2, a dense phase separation structure is created, in which even finer apatite crystals are uniformly precipitated in intertwined structures, giving it a milky white translucent appearance and high strength. The present invention provides a crystallized glass that has good chemical durability and excellent machinability, and is less prone to chipping during cutting.In other words, B2O3
When added, heat treatment is required: Therefore, the glass phase with a lot of SiO2 and the glass phase with less SiO2 are separated, and the two glass phases become intertwined in a mesh shape with a size of about 0.1μ. As a result, a crystallized glass exhibiting a milky white translucent appearance unique to phase splitting glass and having excellent aesthetics is obtained. Addition of CaF2 also has the effect of precipitating many fine apatite crystals from the phase separation interface through low-temperature heat treatment, and also prevents the precipitated apatite crystals from transforming into other phosphoric acid; urushilam crystals, which lowers their strength. There is also an effect.
すなわち本発明の結晶化ガラスは分相し、且つ主結晶と
してアパタイト・結晶を析出していることを特徴とする
もので、より具体的には重量％でＳｉＯ２ ２（１〜６
２％、Ａｌ２Ｏ３３〜３０％、Ｐ２Ｏ５２，５〜３０％
、ＣａＯ５〜４０％、ＭｇＯ ３〜２５％、Ｒ２０（Ｒ
はＬｉ、Ｎａ及びにを示す）０〜１０％、Ｂ２ｏ、 ０
．００１〜５％、ＣａＦ２０．１〜５％の組成を有する
ことを特徴とする。That is, the crystallized glass of the present invention is characterized by phase separation and precipitated apatite crystals as main crystals, and more specifically, SiO2 2 (1 to 6
2%, Al2O33-30%, P2O52,5-30%
, CaO 5-40%, MgO 3-25%, R20 (R
indicates Li, Na and ) 0 to 10%, B2o, 0
．． It is characterized by having a composition of 0.001 to 5% and CaF of 20.1 to 5%.
また本発明の結晶化ガラスは、上記組成を有するガラス
になるように調合した原料を溶融し、鋳型内に注入して
ガラスを成形した後、鋳型から取り出して加熱処理する
ことによって製造さノする。Further, the crystallized glass of the present invention is manufactured by melting raw materials prepared to form a glass having the above composition, injecting it into a mold to form the glass, and then removing it from the mold and heat-treating it. .
本発明の結晶化ガラスは、ガラスの粘性を温度によって
変化が大きくなるように設定してあり、しかも液相温度
を低くしであるので成形性に優れており、人工歯冠とし
てロストワックス法による鋳造成形あるいは金型による
プレス成形が容易に行える。The crystallized glass of the present invention is set so that the viscosity of the glass changes greatly depending on the temperature, and the liquidus temperature is low, so it has excellent moldability, and can be used as an artificial tooth crown by the lost wax method. Casting molding or press molding using a mold can be easily performed.
本発明の分相性結晶化ガラスの組成範囲を上記のように
限定したのは次の理由による。The reason why the composition range of the phase-splitting crystallized glass of the present invention is limited as described above is as follows.
ＳｉＯ２が２０％より少ない場合は、化学耐久性が悪く
なり、６２％より多い場合は溶融温度が高くなり均質な
ガラスが得難くなる。When SiO2 is less than 20%, chemical durability deteriorates, and when it is more than 62%, the melting temperature becomes high and it becomes difficult to obtain a homogeneous glass.
Ａｌ２Ｏ，が３％より少ない場合は化学耐久性が悪くな
ると共に失透性が高くなり、３０％より多い場合は溶融
温度が高くなり均質なガラスが得難くなる。If Al2O is less than 3%, chemical durability will be poor and devitrification will be high; if it is more than 30%, the melting temperature will be high and it will be difficult to obtain a homogeneous glass.
Ｐ２Ｏ５が２．５％より少ない場合は生体歯牙の構成成
分であるアパタイト等のリン酸カルシウム系結晶の析出
量が少なくなり、３０％より多い場合は化学耐久性が悪
くなるため口腔内で不安定になると共に失透性が高くな
るため好ましくない。If P2O5 is less than 2.5%, the amount of calcium phosphate crystals such as apatite, which is a component of living teeth, will be less precipitated, and if it is more than 30%, chemical durability will deteriorate and it will become unstable in the oral cavity. At the same time, the devitrification property increases, which is not preferable.
ＣａＯが５％より少ない場合はアパタイト結晶が析出し
難くなり、４０％より多い場合は結晶サイズの大きな異
種結晶が析出し、半透光性が損なわれるため審美性が悪
くなると共に化学耐久性が悪くなる。If CaO is less than 5%, apatite crystals will be difficult to precipitate, and if it is more than 40%, foreign crystals with large crystal sizes will precipitate, impairing semi-transparent properties, resulting in poor aesthetics and chemical durability. Deteriorate.
１）ｇ０が３％より少ない場合は分相が急速に進行す、
６ため色調が白くなりすぎて審美性が悪くなり。1) If g0 is less than 3%, phase separation will proceed rapidly;
6, the color tone becomes too white, resulting in poor aesthetics.
２５％より多い場合は結晶サイズの大きな異種結晶が析
出し、審美性が悪くなると共に強度も低くなる。If it exceeds 25%, foreign crystals with large crystal sizes will precipitate, resulting in poor aesthetics and lower strength.
Ｌｉ２Ｏ、Ｎａ２Ｏ、Ｋ２Ｏの３成分はガラスを均質に
溶融しやすくすると共にアパタイト結晶以外の好ましい
結晶、すなわち審美性を損なわずに強度を向上させる効
果を有するβ−石英固溶体結晶やネフェリン等のアルミ
ノ′ケイ酸塩系結晶を析出させる。The three components Li2O, Na2O, and K2O make it easier to melt the glass homogeneously, and also provide preferable crystals other than apatite crystals, such as β-quartz solid solution crystals and alumino's such as nepheline, which have the effect of improving strength without impairing aesthetics. Precipitate silicate crystals.
しかしながら２成分の含量が１０％より多い場合は化学
耐久性が悪くなる。However, if the content of the two components is more than 10%, chemical durability deteriorates.
Ｂ２Ｏ３は上記したように結晶化ガラスを分相させるの
に有効な成分であるが、０．００１％より少ない場合は
この効果が得られず、５％より多い場合はアパタイト結
晶が析出しにくくなり生体親和性が悪くなり、また結晶
化ガラスが変形しやすくなると共に化学耐久性が悪くな
る。As mentioned above, B2O3 is an effective component for phase-separating crystallized glass, but if it is less than 0.001%, this effect cannot be obtained, and if it is more than 5%, it becomes difficult for apatite crystals to precipitate. Biocompatibility deteriorates, crystallized glass becomes easily deformed, and chemical durability deteriorates.
ＣａＦ２は微細なアパタイト結晶を安定して析出させる
のに有効な成分であるが、０，１％より少ない場合はこ
の効果が得られず、５％より多い場合は表面結晶化が起
こり強度が低下する。CaF2 is an effective component for stably precipitating fine apatite crystals, but if it is less than 0.1%, this effect cannot be obtained, and if it is more than 5%, surface crystallization occurs and strength decreases. do.
以上のように本発明の分相性結晶化ガラスは、審美性に
優れ外観も生体歯牙に近似しているが、生体歯牙の色調
は各人微妙に相違しており、外観上生体歯牙にさらに似
せる必要がある場合はガラス原料にＶ 、Ｃｒ、 Ｍｕ
、 Ｆｅ、 Ｃｏ、旧、Ｃｕ、入ｇ、 Ａｕ、Ｃｅ、
Ｎｄの酸化物、ハロゲン化物、水酸化物、炭酸塩等各種
塩よりなる群から選ばれた１種あるいは２種以上の着色
成分を混合するか、あるいは上薬を着色グレージングす
ることによって結晶化ガラスを着色することが可能であ
る。As described above, the phase-splitting crystallized glass of the present invention has excellent aesthetics and an appearance similar to living teeth, but the color tone of living teeth differs slightly from person to person, making it more similar in appearance to living teeth. If necessary, add V, Cr, Mu to the glass raw material.
, Fe, Co, Old, Cu, Ing, Au, Ce,
Crystallized glass can be produced by mixing one or more coloring components selected from the group consisting of various salts such as Nd oxides, halides, hydroxides, and carbonates, or by coloring and glazing the top layer. It is possible to color.
［実施例］ 以下実施例に基づいて本発明を説明する。[Example] The present invention will be explained below based on Examples.
次表は本発明の結晶化ガラスの組成とその曲げ強度、ビ
ッカース硬度、化学耐久性を示したものである。The following table shows the composition of the crystallized glass of the present invention, its bending strength, Vickers hardness, and chemical durability.
表のガラス試料は次の、ように調製した。The glass samples shown in the table were prepared as follows.
酸化物、水酸化物、塩化物、炭酸塩、弗化物などを原料
に用いて表のガラス組成になるよて）にバッチを調合し
、これらを白金るつぼに入れて電気炉中で１３００〜１
５００℃で２時間溶融した後冷却して均一なガラスを得
た。一方鋳造型は通常のロストワックス法を用いて作製
した。即ち用意した歯型に溶融したパラフィンを肉盛し
、パラフィンを硬化ｉ５せてワックス模型を作製し、該
ワックス模型にガラスを導くためのパラフィンのスプー
ル線を溶層した後、燐酸塩系又はクリストバライト系埋
没材に埋没し、た。埋没材が硬化した後、徐々に１２０
〜１５０°Ｃまで昇温してワックス模型及びスプール線
を焼却してから徐々に昇温しで７００〜９００℃で保持
することによって作製した。次に上記ガラスを再度１３
００〜１５０１）℃に溶融した融液を上記鋳造型の上面
に注ぎ、遠心鋳造機や真空・加圧鋳造機を用いて鋳造を
完成した。Prepare a batch using oxides, hydroxides, chlorides, carbonates, fluorides, etc. as raw materials (to achieve the glass composition shown in the table), put them in a platinum crucible, and heat them in an electric furnace at 1,300 to 1
After melting at 500° C. for 2 hours, the mixture was cooled to obtain a uniform glass. On the other hand, the casting mold was made using the usual lost wax method. That is, a wax model is prepared by overlaying molten paraffin on a prepared tooth mold, hardening the paraffin, and melting a paraffin spool wire for guiding glass to the wax model. It was buried in a type of investment material. After the investment material has hardened, gradually increase the
The wax model and spool wire were incinerated by raising the temperature to ~150°C, and then the temperature was gradually raised and maintained at 700~900°C. Next, attach the above glass again to 13
The melt melted at a temperature of 00 to 1501)°C was poured onto the upper surface of the casting mold, and casting was completed using a centrifugal casting machine or a vacuum/pressure casting machine.
鋳造したガラス体は鋳型からはずして加熱処理して結晶
化するためガラスによっては少々軟化変形が結晶化工程
で起こり、寸法精度を悪くするので、このＪ：うな場合
は軟化変形が起きないようにＡｌ２Ｏ，やＺ「０２等の
ガラス体と不活性であろ粉末に埋没して結晶化工程に供
する必要がある。結晶化工程は６０〜２４０’Ｃ／ｈｒ
でガラス体を昇温加熱し、７５０〜９５０℃で保持する
ことによって行い、これによって分相し、また主結晶と
して微細なアパタイト結晶を析出した結晶化ガラスが得
られた。The cast glass body is removed from the mold and heat-treated to crystallize it, so depending on the glass, some softening and deformation may occur during the crystallization process, impairing dimensional accuracy. It is necessary to immerse it in a glass body such as Al2O, Z'02, etc. and an inert powder and subject it to the crystallization process.
This was carried out by heating the glass body at an elevated temperature and holding it at 750 to 950°C, thereby obtaining a crystallized glass in which the phases were separated and fine apatite crystals were precipitated as main crystals.
このようにし、て製造された試ｆ４ ＮＩＬ １〜８の
本発明の結晶化ガラスは曲げ強度、ビッカース硬度が高
く、化学耐久性も良好であり、さらに外観が乳白色！ｈ
透明を呈しているため審美性にも優れていた。The crystallized glass of the present invention with test f4 NIL 1 to 8 produced in this manner has high bending strength and Vickers hardness, good chemical durability, and has a milky white appearance! h
It also had excellent aesthetics because it was transparent.
尚、実施例の曲げ強度は５φＸ ５０ｍｍの棒状の結晶
化ガラスを周知の３点荷重方法で、またビッカース硬度
はビッカース硬度計を用いて測定しｌ≧。The bending strength of the examples was measured using a well-known three-point loading method using a rod-shaped crystallized glass measuring 5φ x 50 mm, and the Vickers hardness was measured using a Vickers hardness tester, and l≧.
さらに化学耐久性は２０Ｘ ２０Ｘ ５ ａｒｍのガラ
スの平板を作製し、結晶化させた後鏡面研磨し、これを
１％乳酸に３７℃で７日間浸漬して減量を測定し、た。Furthermore, chemical durability was determined by preparing a 20×20×5 arm glass flat plate, crystallizing it, mirror polishing it, immersing it in 1% lactic acid at 37° C. for 7 days, and measuring the weight loss.
「発明の効果コ
以上のように本発明丙結晶化ガラスは、強度及び硬度が
高く、また化学耐久性が良好であるため口腔内で安定で
ある。``Effects of the Invention As described above, the crystallized glass of the present invention C has high strength and hardness, and has good chemical durability, so it is stable in the oral cavity.
さらに分相し、且つ微細なアパタイト結晶を多量析出す
るため外観が乳白色半透明を呈するため審美性に優れ、
また鋳造成形によって寸法精度よく作製できるため人工
歯冠用の材料として好適である。Furthermore, due to the phase separation and the precipitation of a large amount of fine apatite crystals, the appearance is milky white and translucent, giving it excellent aesthetics.
Moreover, since it can be manufactured with high dimensional accuracy by casting, it is suitable as a material for artificial tooth crowns.
特許出願人 日本電気硝子株式会社 代表者 岸 １）清 作Patent applicant: Nippon Electric Glass Co., Ltd. Representative Kishi 1) Kiyoshi Saku
Claims (3)
しており、外観が乳白色半透明を呈することを特徴とす
る結晶化ガラス。(1) A crystallized glass characterized by phase separation and precipitated apatite crystals as the main crystals, and a milky-white and translucent appearance.
Ｏ＿３ ３〜３０％、Ｐ＿２Ｏ＿５ ２．５〜３０％、
ＣａＯ ５〜４０％、ＭｇＯ ３〜２５％、Ｒ＿２Ｏ（
ＲはＬｉ、Ｎａ及びＫを示す）０〜１０％、Ｂ＿２Ｏ＿
３ ０．００１〜５％、ＣａＦ＿２ ０．１〜５％の組
成を有することを特徴とする特許請求の範囲第１項記載
の結晶化ガラス。(2) In weight%, SiO_2 20-62%, Al_2
O_3 3-30%, P_2O_5 2.5-30%,
CaO 5-40%, MgO 3-25%, R_2O(
R represents Li, Na and K) 0 to 10%, B_2O_
3. The crystallized glass according to claim 1, having a composition of 0.001 to 5% of CaF_2 and 0.1 to 5% of CaF_2.
Ｏ＿３ ３〜３０％、Ｐ＿２Ｏ＿５ ２．５〜３０％、
ＣａＯ ５〜４０％、ＭｇＯ ３〜２５％、Ｒ＿２Ｏ（
ＲはＬｉ、Ｎａ及びＫを示す）０〜１０％、Ｂ＿２Ｏ＿
３ ０．００１〜５％、ＣａＦ＿２ ０．１〜５％の組
成を有するガラスになるように調合した原料を溶融し、
鋳型内に注入してガラスを成形した後、鋳型から取り出
して加熱処理することによって分相させ、且つ主結晶と
してアパタイトを析出させることを特徴とする結晶化ガ
ラスの製造方法。(3) In weight%, SiO_2 20-62%, Al_2
O_3 3-30%, P_2O_5 2.5-30%,
CaO 5-40%, MgO 3-25%, R_2O(
R represents Li, Na and K) 0 to 10%, B_2O_
3 Melt raw materials prepared to make glass with a composition of 0.001 to 5% and CaF_2 0.1 to 5%,
A method for producing crystallized glass, which comprises injecting the glass into a mold to form the glass, then taking it out of the mold and subjecting it to heat treatment to cause phase separation and precipitate apatite as the main crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP686787A JPS63176335A (en) | 1987-01-14 | 1987-01-14 | Crystallized glass and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP686787A JPS63176335A (en) | 1987-01-14 | 1987-01-14 | Crystallized glass and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63176335A true JPS63176335A (en) | 1988-07-20 |
Family
ID=11650188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP686787A Pending JPS63176335A (en) | 1987-01-14 | 1987-01-14 | Crystallized glass and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63176335A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6200137B1 (en) | 1997-06-12 | 2001-03-13 | Ivoclar Ag | Chemically stable translucent apatite glass ceramic |
| US6280863B1 (en) | 1997-06-12 | 2001-08-28 | Ivoclar Ag | Translucent apatite glass ceramic |
| JP2005511470A (en) * | 2001-12-12 | 2005-04-28 | カール−ツァイス−シュティフテゥング | Dental care, ie the use of antibacterial glass ceramics for oral hygiene |
| JP2005524594A (en) * | 2001-12-12 | 2005-08-18 | カール−ツァイス−シュティフテゥング | Antimicrobial alkali silicate glass ceramic and its use |
| KR100930880B1 (en) | 2007-11-05 | 2009-12-10 | 재단법인서울대학교산학협력재단 | Dental structures and methods of manufacturing the same |
| JP2012136390A (en) * | 2010-12-27 | 2012-07-19 | Reiseki:Kk | Glassy material |
| JP2013508257A (en) * | 2009-10-26 | 2013-03-07 | エージーシー グラス ユーロップ | Phase separated soda lime silica glass |
| CN103172263A (en) * | 2013-04-16 | 2013-06-26 | 中国地质科学院 | Biological microcrystalline glass prepared by utilizing phosphate tailings and preparation method thereof |
| US10913679B2 (en) | 2016-09-02 | 2021-02-09 | Soonchunhyang University Industry Academy Cooperation Foundation | Miserite crystallized glass for artificial tooth and method for coloring same |
-
1987
- 1987-01-14 JP JP686787A patent/JPS63176335A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6200137B1 (en) | 1997-06-12 | 2001-03-13 | Ivoclar Ag | Chemically stable translucent apatite glass ceramic |
| US6280863B1 (en) | 1997-06-12 | 2001-08-28 | Ivoclar Ag | Translucent apatite glass ceramic |
| JP2005511470A (en) * | 2001-12-12 | 2005-04-28 | カール−ツァイス−シュティフテゥング | Dental care, ie the use of antibacterial glass ceramics for oral hygiene |
| JP2005524594A (en) * | 2001-12-12 | 2005-08-18 | カール−ツァイス−シュティフテゥング | Antimicrobial alkali silicate glass ceramic and its use |
| JP4794128B2 (en) * | 2001-12-12 | 2011-10-19 | ショット アクチエンゲゼルシャフト | Antimicrobial alkali silicate glass ceramic powder and its use |
| KR100930880B1 (en) | 2007-11-05 | 2009-12-10 | 재단법인서울대학교산학협력재단 | Dental structures and methods of manufacturing the same |
| JP2013508257A (en) * | 2009-10-26 | 2013-03-07 | エージーシー グラス ユーロップ | Phase separated soda lime silica glass |
| JP2012136390A (en) * | 2010-12-27 | 2012-07-19 | Reiseki:Kk | Glassy material |
| CN103172263A (en) * | 2013-04-16 | 2013-06-26 | 中国地质科学院 | Biological microcrystalline glass prepared by utilizing phosphate tailings and preparation method thereof |
| US10913679B2 (en) | 2016-09-02 | 2021-02-09 | Soonchunhyang University Industry Academy Cooperation Foundation | Miserite crystallized glass for artificial tooth and method for coloring same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10981823B2 (en) | Lithium silicate materials | |
| JP2703520B2 (en) | Phosphosilicate glass ceramic containing leucite | |
| US4189325A (en) | Glass-ceramic dental restorations | |
| US6517623B1 (en) | Lithium disilicate glass ceramics | |
| EP1505041B1 (en) | Lithium silicate materials | |
| JP3093691B2 (en) | Sinterable lithium disilicate glass ceramic | |
| US4431420A (en) | Glass-ceramic dental products | |
| JP2807752B2 (en) | Crystallized glass material | |
| JP2983962B2 (en) | Translucent apatite glass ceramic | |
| JP4066119B2 (en) | Ceramic dental restoration and manufacturing method thereof | |
| JP3113230B2 (en) | Chemically stable translucent apatite glass ceramic | |
| JPH02149447A (en) | Dental crystallized glass | |
| JPS6210939B2 (en) | ||
| JPS63176335A (en) | Crystallized glass and production thereof | |
| JP2000500730A (en) | High rigid transparent mica-glass ceramic | |
| JPS62123042A (en) | Crystallized glass for dental material having improved aesthetic property and production thereof | |
| US4799887A (en) | Glass ceramic dental crown and method of manufacturing the same | |
| JPH0436107B2 (en) | ||
| JPH0193439A (en) | Production of crystallized glass for dental material and embedding material | |
| JPH1036136A (en) | Ceramic for dentistry | |
| RU2144814C1 (en) | Glassceramic material for manufacturing dentures | |
| JPS61236632A (en) | Crystallized glass for organism | |
| JPH02153839A (en) | Dental crystallized glass | |
| JPH0154290B2 (en) | ||
| JPS63174909A (en) | Tooth model and production thereof |