JPS63310805A - Baking porcelain for dental use having high resistance to yellowing - Google Patents
Baking porcelain for dental use having high resistance to yellowingInfo
- Publication number
- JPS63310805A JPS63310805A JP62147460A JP14746087A JPS63310805A JP S63310805 A JPS63310805 A JP S63310805A JP 62147460 A JP62147460 A JP 62147460A JP 14746087 A JP14746087 A JP 14746087A JP S63310805 A JPS63310805 A JP S63310805A
- Authority
- JP
- Japan
- Prior art keywords
- porcelain
- weight
- nitric acid
- dental
- acid compound
- 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
- 229910052573 porcelain Inorganic materials 0.000 title claims abstract description 85
- 238000004383 yellowing Methods 0.000 title abstract description 21
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 34
- -1 nitric acid compound Chemical class 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000007864 aqueous solution Substances 0.000 claims abstract description 15
- 238000010304 firing Methods 0.000 claims description 12
- 239000002670 dental porcelain Substances 0.000 claims description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 21
- 229910052709 silver Inorganic materials 0.000 abstract description 19
- 239000004332 silver Substances 0.000 abstract description 19
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000956 alloy Substances 0.000 abstract description 9
- 229910045601 alloy Inorganic materials 0.000 abstract description 9
- 229910052763 palladium Inorganic materials 0.000 abstract description 7
- 230000000704 physical effect Effects 0.000 abstract description 3
- 238000002845 discoloration Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- 239000003086 colorant Substances 0.000 description 9
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical class O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 8
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 8
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 8
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 8
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- CHPZKNULDCNCBW-UHFFFAOYSA-N gallium nitrate Chemical compound [Ga+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O CHPZKNULDCNCBW-UHFFFAOYSA-N 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 210000000332 tooth crown Anatomy 0.000 description 5
- 238000004394 yellowing prevention Methods 0.000 description 5
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 4
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 4
- RXPAJWPEYBDXOG-UHFFFAOYSA-N hydron;methyl 4-methoxypyridine-2-carboxylate;chloride Chemical compound Cl.COC(=O)C1=CC(OC)=CC=N1 RXPAJWPEYBDXOG-UHFFFAOYSA-N 0.000 description 4
- 239000004323 potassium nitrate Substances 0.000 description 4
- 235000010333 potassium nitrate Nutrition 0.000 description 4
- RTHYXYOJKHGZJT-UHFFFAOYSA-N rubidium nitrate Inorganic materials [Rb+].[O-][N+]([O-])=O RTHYXYOJKHGZJT-UHFFFAOYSA-N 0.000 description 4
- 239000004317 sodium nitrate Substances 0.000 description 4
- 235000010344 sodium nitrate Nutrition 0.000 description 4
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 description 4
- KHAUBYTYGDOYRU-IRXASZMISA-N trospectomycin Chemical compound CN[C@H]([C@H]1O2)[C@@H](O)[C@@H](NC)[C@H](O)[C@H]1O[C@H]1[C@]2(O)C(=O)C[C@@H](CCCC)O1 KHAUBYTYGDOYRU-IRXASZMISA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 description 4
- HWSISDHAHRVNMT-UHFFFAOYSA-N Bismuth subnitrate Chemical compound O[NH+]([O-])O[Bi](O[N+]([O-])=O)O[N+]([O-])=O HWSISDHAHRVNMT-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 3
- 229960001482 bismuth subnitrate Drugs 0.000 description 3
- 230000010485 coping Effects 0.000 description 3
- 229940044658 gallium nitrate Drugs 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- PROKORCOXXRGQI-UHFFFAOYSA-M bismuth(2+);hydroxide;nitrate Chemical compound [OH-].[Bi+2].[O-][N+]([O-])=O PROKORCOXXRGQI-UHFFFAOYSA-M 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- GAGGCOKRLXYWIV-UHFFFAOYSA-N europium(3+);trinitrate Chemical compound [Eu+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GAGGCOKRLXYWIV-UHFFFAOYSA-N 0.000 description 2
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 150000002823 nitrates Chemical class 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- KUBYTSCYMRPPAG-UHFFFAOYSA-N ytterbium(3+);trinitrate Chemical compound [Yb+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O KUBYTSCYMRPPAG-UHFFFAOYSA-N 0.000 description 2
- 244000198134 Agave sisalana Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Dental Preparations (AREA)
- Dental Prosthetics (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は歯科用焼付陶材の塗布後の焼成過程で表面に黄
変が生じない歯科用焼付陶材および歯科用焼付陶材の黄
変防止方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a dental fired porcelain that does not cause yellowing on the surface during the firing process after application of the dental fired porcelain, and a method for preventing yellowing of the dental fired porcelain. Regarding.
従来技術
天然歯に近い形態並びに色調を持った人工歯冠は、まず
、陶材焼付用金属からできた金属コーピングまたは金属
支台に、オペーク陶材という歯科用焼付陶材を液で練っ
て得られた不透明なペーストを薄く築盛（塗布）し、焼
成することにより、金属コーピングまたは金属支台の金
属色を隠し、尚かつ目的とする人工歯冠の基礎的な色調
を得、次に、ボディー、イニサイザル、トランスルーセ
ント歯冠用陶材を水または専用液で練り、その順で、必
要な厚さに築盛、焼成する操作を少なくとも１回以上行
ない、目的とする形態並びに色調を得、最後に、ブレー
ス焼成を行い形成される。Prior Art Artificial tooth crowns with a shape and color similar to natural teeth are first made by mixing a dental baking porcelain called opaque porcelain with a liquid onto a metal coping or metal abutment made of a metal for porcelain baking. By applying a thin layer of opaque paste and firing, it hides the metallic color of the metal coping or metal abutment and obtains the desired basic color tone of the artificial tooth crown. , initial, and translucent dental crown porcelains are kneaded with water or a special solution, and in that order, the operations of building up to the required thickness and firing are performed at least once to obtain the desired shape and color tone, and finally, , is formed by brace firing.
陶材焼付用金属としては、パラジウムを主体とする合金
が、安価であり経済的であるため広く普及してきている
。係るパラジウム主体陶材焼付用金属には、後ロウ着法
を適用する必要が生じた場合、ロウの拡散を良くし、容
易に後ロウ着できるように銀が含有されている。As a metal for firing porcelain materials, alloys mainly containing palladium have become widely used because they are inexpensive and economical. Such palladium-based porcelain baking metals contain silver to improve solder diffusion and facilitate post-brazing when it becomes necessary to apply a post-brazing method.
しかし、このように銀か含有されていると、各陶材を焼
成する過程で金属と陶材の界面および陶材の表面に銀に
起因する黄色着色現象（以下、「黄変」という）が起こ
り、目的とする色調の人工歯冠が得られない欠点がある
。However, when silver is contained in this way, a yellowing phenomenon (hereinafter referred to as "yellowing") caused by silver occurs at the interface between the metal and porcelain and on the surface of the porcelain during the firing process of each porcelain. This has the disadvantage that an artificial tooth crown with the desired color cannot be obtained.
係る陶材表面の黄変を防止する方法としては、陶材を焼
成するときにカーボンの塊を陶材の近くに置いて、同時
に焼成し、陶材表面を二酸化炭素ガス雰囲気で覆う方法
があるが、この方法では、金属と陶材の界面近くの黄変
まで完全に防ぐには至っていない。One way to prevent such yellowing of the porcelain surface is to place a lump of carbon near the porcelain when firing the porcelain, simultaneously firing it, and covering the porcelain surface with a carbon dioxide gas atmosphere. However, this method does not completely prevent yellowing near the interface between metal and porcelain.
また、銀を数％含んだ金 白金の貴金属の合金を主成分
とする焼付用金属があり、この物を使用すると、銀によ
る黄変が殆ど認められない。しかし高価であるため、前
記した銀を含有したパラジウムを主体とした合金が非常
に多く使われてきているのが実状である。There is also a baking metal whose main component is an alloy of precious metals such as gold and platinum that contains several percent silver, and when this material is used, yellowing due to silver is hardly observed. However, because they are expensive, alloys mainly consisting of palladium containing silver have been used in large numbers.
発明が解決しようとする問題点
陶材焼付用合金として安価でしかも容易に後ロウ着がで
きる銀を含んだパラジウム主体の陶材焼付用金属コーテ
ィングまたは支台上に歯科用焼付陶材を築盛し焼付ける
過程で、銀に起因する黄変現象が発生する。Problems to be Solved by the Invention A dental baking porcelain is built up on a porcelain baking metal coating or base made of silver-containing palladium, which is inexpensive as an alloy for porcelain baking and can be easily post-brazed. During the baking process, yellowing occurs due to silver.
本発明は陶材の持つ物理的特性を大きく変えることなく
、このような黄変を防止することを目的とする。The present invention aims to prevent such yellowing without significantly changing the physical properties of the porcelain.
本発明は硝酸化合物を含有することを特徴とする歯科用
焼付陶材に関する。The present invention relates to a dental porcelain material characterized by containing a nitric acid compound.
本発明はまた歯科用焼付陶材を硝酸化合物を含有する陶
材練和液で練和した後焼付けることを特徴とする歯科用
焼付陶材の黄変防止方法に関する。The present invention also relates to a method for preventing yellowing of dental porcelain, which comprises kneading the dental porcelain with a porcelain mixing solution containing a nitric acid compound and then baking the mixture.
本発明に従い、歯科用焼付陶材中に、あるいは歯科用焼
付陶材を練る液に、硝酸化合物を微量添加すると、歯科
用焼付陶材を焼成する過程で硝酸化合物が分解または反
応して酸素を発生し、銀が酸化状態に保たれるため、銀
に起因する陶材の黄変を防止することができる。
゛硝酸化合物は水溶性のもの、難溶性のもの何れ
ら使用可能で、水溶性の硝酸化合物としては、硝酸を含
むものとして、硝酸ナトリウム、硝酸カリウム、硝酸カ
ルシウム、硝酸アンモニウム、硝酸アルミニウム、硝酸
マグネシウム、硝酸ガリウム、硝酸バリウム、硝酸ルビ
ジウム、硝酸ストロンチウム、硝酸第１セリウム、硝酸
亜鉛、硝酸イツトリウム、硝酸ユウロピウム、硝酸ラン
タン、硝酸イッテルビウム等が使用できる。その他に、
難溶性の硝酸化合物、例えば次硝酸ビスマス、硝酸ビス
マス、硝酸水酸化ビスマス、硝酸酸化ビスマス等も使用
可能である。According to the present invention, when a small amount of nitric acid compound is added to the dental fired porcelain or to the solution for kneading the dental fired porcelain, the nitrate compound decomposes or reacts during the firing process of the dental fired porcelain, releasing oxygen. Since silver is generated and maintained in an oxidized state, yellowing of porcelain caused by silver can be prevented.
゛Nitrate compounds can be either water-soluble or poorly soluble. Examples of water-soluble nitric acid compounds that include nitric acid include sodium nitrate, potassium nitrate, calcium nitrate, ammonium nitrate, aluminum nitrate, magnesium nitrate, and nitric acid. Gallium, barium nitrate, rubidium nitrate, strontium nitrate, cerous nitrate, zinc nitrate, yttrium nitrate, europium nitrate, lanthanum nitrate, ytterbium nitrate, etc. can be used. Other,
Slightly soluble nitric acid compounds such as bismuth subnitrate, bismuth nitrate, bismuth nitrate hydroxide, bismuth nitrate oxide, etc. can also be used.
本発明は歯科用焼付陶材として、公知の陶材、例えばオ
ペーク陶材、ボディー、インサイザル、トランスルーセ
ント等の各陶材に適用可能であり、一般にオペーク陶材
は下記表１に示した陶材基本組成物８５〜１００重量％
と着色剤０〜１５重量％よりなる不透明な陶材であり、
ボディー、イン ′サイザル、トランスルーセント陶
材は下記表２に示した陶材基本組成物９０〜１００重量
％と着色剤０〜１０重量％よりなる。The present invention can be applied to known porcelains such as opaque porcelain, body, incisal, and translucent porcelains as dental baking porcelains. Generally, opaque porcelains are the porcelains shown in Table 1 below. Material basic composition 85-100% by weight
It is an opaque porcelain material consisting of 0 to 15% by weight of colorant and
The body, in'sisal, and translucent porcelains consist of 90 to 100% by weight of the basic porcelain composition shown in Table 2 below and 0 to 10% by weight of a coloring agent.
着色剤としてはコバルト、クロム、マンガン、アルミニ
ウム、鉄、バナジウム、アンチモンの各酸化物、あるい
はそれらの混合物を使用することができる。As the coloring agent, oxides of cobalt, chromium, manganese, aluminum, iron, vanadium, and antimony, or mixtures thereof can be used.
表−１
Ｓｉｏｔ ３０〜５０
、Ａｌｔ０３ ８〜１５
Ｋ２Ｏ ７〜１２
Ｎａ２Ｏ １〜７
Ｌｉｍｐ ０〜２
ＣａＯ０〜２
Ｍｇ０ ’０〜０．５
Ｂ ｔ ０３０〜３．５
Ｔ ｉ Ｏｔ ０〜１ＯＳｎＯ，０〜
３２
ＺｒＳｉ０． ０〜１５
表−２
ボディー、インサイザル、トランス
ルーセント用陶材基本組成物
成分 重量（％）
Ｓｉｎ、 ４２〜６５
Ａｌ５Ｏ１２３〜１９
Ｋ２Ｏ７〜１２
ＮａｚＯｌ〜６
Ｌ ｉｏ ２ ０〜２．５
ＣａＯ’０〜２．５
Ｍｇ０ ０〜１
８２０３０〜Ｉ２
ＺｎＯ０〜１０
硝酸化合物を含有した歯科用焼付陶材を得るには、以下
に示した３つの方法が例示できる。Table-1 Siot 30-50, Alt03 8-15 K2O 7-12 Na2O 1-7 Limp 0-2 CaO0-2 Mg0 '0-0.5 B t 030-3.5 T i Ot 0-1OSnO, 0-
32 ZrSi0. 0~15 Table-2 Components of basic porcelain composition for body, incisal, and translucent Weight (%) Sin, 42~65 Al5O123~19 K2O7~12 NazOl~6 L io 2 0~2.5 CaO'0~ 2.5 Mg0 0-1 82030-I2 ZnO0-10 The following three methods can be used to obtain a dental porcelain containing a nitric acid compound.
まず、第１番目の方法として、陶材基本組成物の全量を
硝酸化合物の水溶液で十分混練し、水分を乾燥除去する
方法である。First, the first method is to thoroughly knead the entire amount of the basic porcelain composition with an aqueous solution of a nitric acid compound, and then dry and remove the moisture.
硝酸化合物の水溶液の濃度は陶材基本組成物に対して０
．０１〜２．０重量％、好ましくは０゜１〜１．０重量
％を使用する。０．０１重量％より低い濃度であると黄
変防止効果が十分でなく、１．０重量％より高い濃度で
あると、黄変防止効果は十分得られるが、陶材焼成後、
その表面が不透明になる傾向が強く、好ましくない。The concentration of the aqueous solution of nitric acid compound is 0 with respect to the basic porcelain composition.
．． 0.01 to 2.0% by weight, preferably 0.1 to 1.0% by weight. If the concentration is lower than 0.01% by weight, the yellowing prevention effect will not be sufficient, and if the concentration is higher than 1.0% by weight, the yellowing prevention effect will be sufficient, but after firing the porcelain,
The surface tends to become opaque, which is undesirable.
以下、本明細書においては、「水溶液の濃度Ｊは、処理
する陶材の量に対する硝酸化合物の使用量の割合を意味
するものとする。Hereinafter, in this specification, "the concentration J of the aqueous solution shall mean the ratio of the amount of nitric acid compound used to the amount of porcelain to be treated.
１番目の方法１こおいては、また歯科用焼付陶材と硝酸
化合物が溶解した水溶液（陶材混和液）との混練溶液を
乾燥することなく、そのまま築盛に使用することも可能
である。かかる点から、歯科用焼付陶材を硝酸化合物を
含有する陶材練和液で練和した後焼付けることを特徴と
する歯科用焼付陶材の黄変防止方法も本発明として構成
され得るものである。In the first method 1, it is also possible to use a kneaded solution of dental fired porcelain and an aqueous solution (porcelain mixture) in which a nitric acid compound is dissolved, as it is for building up, without drying it. From this point of view, a method for preventing yellowing of dental baking porcelain, which is characterized in that the dental baking porcelain is kneaded with a porcelain mixing liquid containing a nitric acid compound and then baked, can also be constituted as the present invention. It is.
１番目の方法は、特に、水溶性の硝酸化合物、例えば、
硝酸ナトリウム、硝酸カリウム、硝酸カルシウム、硝酸
アンモニウム、硝酸アルミニウム、硝酸マグネシウム、
硝酸ガリウム、硝酸バリウム、硝酸ルビジウム、硝酸ス
トロンチウム、硝酸第１セリウム、硝酸亜鉛、硝酸イツ
トリウム、硝酸ユウロピウム、硝酸ランタン、硝酸イッ
テルビウム等に対して有効である。The first method in particular uses water-soluble nitric acid compounds, e.g.
Sodium nitrate, potassium nitrate, calcium nitrate, ammonium nitrate, aluminum nitrate, magnesium nitrate,
It is effective against gallium nitrate, barium nitrate, rubidium nitrate, strontium nitrate, cerous nitrate, zinc nitrate, yttrium nitrate, europium nitrate, lanthanum nitrate, ytterbium nitrate, etc.
第２番目の方法としては、陶材基本組成物の一部を、硝
酸化合物の水溶液と十分混練し、水分を乾燥除去して得
られた陶材基本組成物と、硝酸化合物で処理しなかった
残りの陶材基本組成物とを十分混合し調製するものであ
る。In the second method, a part of the basic porcelain composition was thoroughly kneaded with an aqueous solution of a nitric acid compound, and the water was removed by drying. It is prepared by sufficiently mixing with the remaining porcelain basic composition.
この場合の、硝酸化合物水溶液の濃度は、混練する陶材
基本組成物の割合と逆比例の割合から、それの５倍まで
の割合とする。例えば、硝酸化合物を含有させようとす
る陶材基本組成物の２０重重量を硝酸化合物の水溶液と
混練する場合、硝酸化合物水溶液の濃度は０．０５〜１
０重量％とするがごときである。即ち、結果的には陶材
基本組成物の全質量に対して前記の１番目の方法で述べ
た同様の量の硝酸化合物を使用するのが好ましいのであ
り、その量よりも多くても少なくても、前記１番目の方
法で述べた同様の理由により好ましくない。In this case, the concentration of the nitric acid compound aqueous solution is inversely proportional to the proportion of the basic porcelain composition to be kneaded to a proportion up to five times the proportion. For example, when kneading 20 weight of the basic porcelain composition to contain a nitric acid compound with an aqueous solution of a nitric acid compound, the concentration of the aqueous nitric acid compound solution is 0.05 to 1.
This is equivalent to 0% by weight. That is, as a result, it is preferable to use the same amount of nitric acid compound as described in the first method above with respect to the total mass of the basic porcelain composition, and the amount may be more or less than that amount. This is also not preferred for the same reason as stated in the first method.
第３番目の方法としては、硝酸化合物が不溶性あるいは
難溶性の硝酸化合物、例えば、次硝酸ビスマス、硝酸ビ
スマス、硝酸水酸化ビスマス、硝酸酸化ビスマス等に対
して、特に有効な方法であるが、そのような硝酸化合物
を歯科用焼付陶材に対して０．２〜２．０重量％、好ま
しくは０．５〜２．０重里％の割合で、混合し得るもの
である。The third method is particularly effective for insoluble or poorly soluble nitrate compounds, such as bismuth subnitrate, bismuth nitrate, bismuth nitrate hydroxide, and bismuth nitrate oxide. Such a nitric acid compound can be mixed with the dental baking porcelain in an amount of 0.2 to 2.0% by weight, preferably 0.5 to 2.0% by weight.
０．２重量％より少ない場合は黄変防止効果を十分得る
ことができず、２．０重量％より多い場合は黄変防止効
果は十分であるが、陶材焼成後、その表面が不透明にな
る傾向が強くなり好ましくない。If it is less than 0.2% by weight, the yellowing prevention effect cannot be obtained sufficiently, and if it is more than 2.0% by weight, the yellowing prevention effect is sufficient, but after firing the porcelain, the surface becomes opaque. This is not desirable as the tendency to become more severe.
本発明の硝酸化合物を含有する歯科用焼付陶材は、水ま
たは専用の混和液で混練し、銀を含有する陶材焼付用合
金からなる金属コーピングまたは金属支台上に築盛し真
空中で９５０〜９６０℃の温度で焼き付ける歯科技工上
の通常の操作で、天然歯に近い色調の人工歯冠を形成す
ることができ本発明の特徴および利点をさらに実施例を
用いてさらに詳しく説明するが、本発明はそれらに限定
されるものではない。The dental baking porcelain containing the nitric acid compound of the present invention is kneaded with water or a special mixing liquid, and then built up on a metal coping or a metal base made of a silver-containing porcelain baking alloy, and heated to 950°C in a vacuum. It is possible to form an artificial tooth crown with a color similar to that of a natural tooth by baking at a temperature of ~960°C using normal operations on a dental technique.The features and advantages of the present invention will be explained in more detail using Examples. The present invention is not limited thereto.
実施例１
歯科用金属焼付陶材のオペーク陶材及びボディー、イン
サイザル、トランスルーセント、陶材の基本組成として
表３および表４に示した組成を有するものを使用した。Example 1 Opaque porcelains, body, incisal, translucent, and porcelains having the compositions shown in Tables 3 and 4 were used as dental metal-baked porcelains.
表−３ ＳｉＯｘ ４２．１ Ａｌｔ０３ １３．１ Ｋ２Ｏ ８．２ Ｎａ２Ｏ ５．ｌ ＣａＯ１，２ Ｂ２Ｏ３ ３．２ Ｓｎ０． ２４．０ 着色剤 ３．１ なお、着色剤は、Ｆｅ５Ｔｉ、Ｃｒ５Ａ（、Ｍｎ。Table-3 SiOx 42.1 Alt03 13.1 K2O 8.2 Na2O 5. l CaO1,2 B2O3 3.2 Sn0. 24.0 Colorant 3.1 Note that the colorants include Fe5Ti, Cr5A (, Mn.
Ｎｉなどの金属酸化物よりなる。Made of metal oxide such as Ni.
表−４
ボディー、インサイザル、トランス
ルーセント用陶材基本組成物
成 分 重量（％）
ＳｉＯｙ ６０．８５
Ａｌｔ０３ １６．９
Ｋ２Ｏ １０．２
Ｎａ２Ｏ ５．８
Ｌ ｉＯｔ Ｏ、３
ＣａＯ１，３
Ｍｇ０ ０．３
Ｂ２Ｏ３ ３．２
着色剤 １．１５
なお、着色剤はＦｅ、 Ｔｉ５Ｃｒ、 Ａｌ１、Ｍｎ５
Ｎｉなどの金属酸化物よりなる。Table-4 Basic porcelain composition components for body, incisal, and translucent Weight (%) SiOy 60.85 Alt03 16.9 K2O 10.2 Na2O 5.8 L iOt O,3 CaO1,3 Mg0 0.3 B2O3 3.2 Colorant 1.15 The colorant is Fe, Ti5Cr, Al1, Mn5
Made of metal oxide such as Ni.
オペーク陶材は、基本陶材８５〜１００重量％、着色剤
０〜１５重量％からなり、ボディー、インサイザル、ト
ランスルーセントはその基本陶材９０〜１００重量％、
着色剤０〜１０重量％からなるもので、各々の陶材を０
．１，１．０．２．０重量％の硝酸化合物の水溶液で練
り゛、円筒型のタブレット型に流し込み、コンデンスし
て表面に浮き上がった液をティッシュペーパーで吸い取
り、更にコンデンスと液の吸い取り操作を繰返し、タブ
レット状に成型し純銀板上に置き、過去に従って真空焼
成した（７００℃から真空で９２０℃まで昇温）。純銀
板を使用したのは銀を含有する金属よりも、純銀のほう
がはるかに強く陶材を黄変（黄色着色）するのを利用し
たもので、本発明の黄変（黄色着色）防止効果をわかり
易くするためである。硝酸化合物として硝酸ナトリウム
、硝酸カリウム、硝酸カルシウム、硝酸アンモニウム、
硝酸アルミニウム、硝酸マグネシウム、硝酸ガリウム、
硝酸バリウム、硝酸ルビジウムである。 結果を表５に
示した。表中、×は黄変する、ムは少し黄変する、△は
極く少し黄変する、○はほとんど黄変しない、◎は黄変
しないことを示す。Opaque porcelain consists of 85 to 100% by weight of basic porcelain and 0 to 15% by weight of colorant, and body, incisal, and translucent consist of 90 to 100% by weight of basic porcelain.
It consists of a coloring agent of 0 to 10% by weight, and each porcelain is
．． 1. Knead with an aqueous solution of 0.2.0% by weight nitric acid compound, pour it into a cylindrical tablet mold, condense it, and absorb the liquid that has risen to the surface with tissue paper. It was repeatedly formed into a tablet shape, placed on a pure silver plate, and vacuum fired as in the past (temperature raised from 700°C to 920°C in vacuum). The use of pure silver plates takes advantage of the fact that pure silver yellows porcelain much more strongly than silver-containing metals, and thus the yellowing prevention effect of the present invention can be achieved. This is to make it easier to understand. Nitric acid compounds include sodium nitrate, potassium nitrate, calcium nitrate, ammonium nitrate,
aluminum nitrate, magnesium nitrate, gallium nitrate,
These are barium nitrate and rubidium nitrate. The results are shown in Table 5. In the table, × indicates yellowing, MU indicates slight yellowing, △ indicates very slight yellowing, ○ indicates almost no yellowing, and ◎ indicates no yellowing.
実施例２
実施例１の表３又は表４に示した同様の基本陶材を使用
し、その全量を硝酸或いは硝酸化合物の水溶液で表面処
理する。水溶液の濃度は全量処理で０．Ｏ１〜０．５％
水溶液で処理し、その後乾燥し、陶材表面に硝酸或いは
硝酸化合物をコーティングした基本陶材を着色し、それ
ぞれオペーク陶材及びボディー、インサイザル、トラン
スルーセント陶材として、円筒型のタブレット型に流し
込みコンデンスして表面に浮き上がる液をティッシュペ
ーハーで吸い取り、更にコンデンスと液の吸い取り操作
を繰返し、タブレット状に成型し、純銀板上に置き、適
法に従って真空焼成した（７００℃から真空で９２０°
Ｃまで昇温）。純銀を使用したのは実施例１と同様の理
由であり、硝酸化合物としては、硝酸ナトリウム、硝酸
カリウム、硝酸カルシウム、硝酸アンモニウム、硝酸ア
ルミニウム、硝酸マグネシウム、硝酸ガリウム、硝酸バ
リウム、硝酸ルビジウムを使用した。Example 2 A basic porcelain material similar to that shown in Table 3 or Table 4 of Example 1 is used, and the entire amount thereof is surface-treated with nitric acid or an aqueous solution of a nitric acid compound. The concentration of the aqueous solution is 0. O1~0.5%
The basic porcelain is treated with an aqueous solution, then dried, and coated with nitric acid or a nitric acid compound on the porcelain surface.The basic porcelain is colored and poured into cylindrical tablet molds as opaque porcelain, body, incisal, and translucent porcelain, respectively. The liquid that condensed and floated to the surface was absorbed with a tissue paper, and the condensation and liquid absorption operations were repeated, formed into a tablet, placed on a pure silver plate, and vacuum fired according to the legal method (from 700°C to 920° in vacuum).
(heat up to C). Pure silver was used for the same reason as in Example 1, and the nitrate compounds used were sodium nitrate, potassium nitrate, calcium nitrate, ammonium nitrate, aluminum nitrate, magnesium nitrate, gallium nitrate, barium nitrate, and rubidium nitrate.
結果を表６に示した。The results are shown in Table 6.
実施例３
実施例１の表３または表４に示した同様の基本陶材を使
用し、その陶材に次硝酸ビスマスを０゜２〜２．０重量
％加え、混合により均一に分散させた各基本陶材を着色
し、それぞれ、オペーク陶は及びボディー、インサイザ
ル、トランスルーセント陶材とし、水で練り、円筒型の
タブレット型に流し込みコンデンスして表面に浮き上が
る液をティッシュペーパーで吸い取り、更にコンデンス
と液の吸い取り操作を繰返し、タブレット状に成型し、
純銀板上に置き、適法に従って真空焼成し１こ（７００
℃から真空で９２０℃まで昇温）。Example 3 A basic porcelain similar to that shown in Table 3 or Table 4 of Example 1 was used, and 0.2 to 2.0% by weight of bismuth subnitrate was added to the porcelain and uniformly dispersed by mixing. Each basic porcelain is colored and made into opaque, body, incisal, and translucent porcelain, kneaded with water, poured into a cylindrical tablet mold, condensed, and the liquid that rises to the surface is absorbed with tissue paper. Repeat the condensation and liquid blotting operations, form into a tablet shape,
Place it on a pure silver plate and vacuum-fire it according to the law.
℃ to 920℃ in vacuum).
結果を表７に示した。なお表中の記号は表５に使用した
ものと同様のことを意味する。The results are shown in Table 7. Note that the symbols in the table have the same meanings as those used in Table 5.
表７
発明の効果
本発明は陶材焼付用金属として経済的で貴金属合金に相
当する簡単な後ロウ着のできる銀を含有したパラジウム
を主体とした陶材焼付用合金上に歯科用焼付陶材を焼付
たときに発生する黄変（黄色着色）を防止することがで
き、通常の操作で天然歯に近い色調の人工歯冠を得るこ
とができる。Table 7 Effects of the Invention The present invention is an economical metal for porcelain baking, and can be used for dental baking on a palladium-based porcelain baking alloy containing silver, which can be easily post-brazed and comparable to noble metal alloys. It is possible to prevent yellowing (yellow discoloration) that occurs when the tooth is baked, and it is possible to obtain an artificial tooth crown with a color similar to that of a natural tooth through normal operations.
Claims (1)
陶材。 ２、歯科用焼付陶材が、オペーク、ボディー、インサイ
ザル、トランスルーセント各陶材である第１項記載の歯
科用焼付陶材。 ３、オペーク陶材が下記陶材基本組成物； ＳｉＯ＿２ ３０〜５０重量％ Ａｌ＿２Ｏ＿３ ８〜１５重量％ Ｋ＿２Ｏ ７〜１２重量％ Ｎａ＿２Ｏ １〜７重量％ ＬｉＯ＿２ ０〜２重量％ ＣａＯ ０〜２重量％ ＭｇＯ ０〜０．５重量％ Ｂ＿２Ｏ＿３ ０〜３．５重量％ ＴｉＯ＿２ ０〜１０重量％ ＳｎＯ＿２ ０〜３２重量％ ＺｒＳｉＯ＿４ ０〜１５重量％ からなる第２項記載の歯科用焼付陶材。 ４、ボディー、インサイザル、トランスルーセント各陶
材が下記陶材基本組成物； ＳｉＯ＿２ ４２〜６５重量％ Ａｌ＿２Ｏ＿３ １３〜１９重量％ Ｋ＿２Ｏ ７〜１２重量％ Ｎａ＿２Ｏ １〜６重量％ ＬｉＯ＿２ ０〜２．５重量％ ＣａＯ ０〜２．５重量％ ＭｇＯ ０〜１重量％ Ｂ＿２Ｏ＿３ ０〜１２重量％ ＺｎＯ ０〜１０重量％ よりなる第２項記載の歯科用焼付陶材。 ５、陶材基本組成物の全量または一部を硝酸化合物の水
溶液で表面処理した後、乾燥することにより硝酸化合物
を含有させることを特徴とする第２項ないし第４項いず
れかに記載の歯科用焼付陶材。 ６、陶材基本組成物の全量を、該組成物に対して０．０
１〜１．０重量％の硝酸化合物の水溶液で表面処理した
第５項記載の歯科用焼付陶材。 ７、陶材基本組成物の一部を、その割合と逆比例の割合
をした硝酸化合物の水溶液で表面処理した第５項記載の
歯科用焼付陶材。 ８、不溶性または難溶性の硝酸化合物を歯科用焼付陶材
に対して０．２〜２．０重量％含有することを特徴とす
る第１項ないし第４項記載の歯科用焼付陶材。[Claims] 1. A dental porcelain material characterized by containing a nitric acid compound. 2. The dental porcelain according to item 1, wherein the dental porcelain is opaque, body, incisal, or translucent porcelain. 3. The opaque porcelain has the following porcelain basic composition: SiO_2 30-50% by weight Al_2O_3 8-15% by weight K_2O 7-12% by weight Na_2O 1-7% by weight LiO_2 0-2% by weight CaO 0-2% by weight MgO The baked dental porcelain material according to item 2, comprising: 0 to 0.5% by weight, B_2O_3 0 to 3.5% by weight, TiO_2 0 to 10% by weight, SnO_2 0 to 32% by weight, and ZrSiO_4 0 to 15% by weight. 4. Each of the body, incisal, and translucent porcelains has the following basic porcelain compositions: SiO_2 42-65% by weight Al_2O_3 13-19% by weight K_2O 7-12% by weight Na_2O 1-6% by weight LiO_2 0-2.5 2. The dental porcelain material according to item 2, comprising: CaO 0-2.5% by weight, MgO 0-1% by weight, B_2O_3 0-12% by weight, and ZnO 0-10% by weight. 5. The dental treatment according to any one of items 2 to 4, characterized in that the porcelain basic composition is surface-treated in whole or in part with an aqueous solution of a nitric acid compound, and then dried to contain the nitric acid compound. For firing porcelain. 6. The total amount of the basic porcelain composition is 0.0% relative to the composition.
6. The dental porcelain according to item 5, which is surface-treated with an aqueous solution of 1 to 1.0% by weight of a nitric acid compound. 7. The baked dental porcelain material according to item 5, wherein a part of the basic porcelain composition is surface-treated with an aqueous solution of a nitric acid compound in a proportion inversely proportional to the proportion thereof. 8. The dental fired porcelain material according to any one of items 1 to 4, which contains an insoluble or poorly soluble nitric acid compound in an amount of 0.2 to 2.0% by weight based on the dental fired porcelain material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14746087A JP2561278B2 (en) | 1987-06-10 | 1987-06-10 | Dental baked porcelain excellent in preventing yellowing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14746087A JP2561278B2 (en) | 1987-06-10 | 1987-06-10 | Dental baked porcelain excellent in preventing yellowing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63310805A true JPS63310805A (en) | 1988-12-19 |
| JP2561278B2 JP2561278B2 (en) | 1996-12-04 |
Family
ID=15430869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14746087A Expired - Lifetime JP2561278B2 (en) | 1987-06-10 | 1987-06-10 | Dental baked porcelain excellent in preventing yellowing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2561278B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5466285A (en) * | 1992-03-19 | 1995-11-14 | Noritake Co., Limited | Dental porcelain material preventing yellow coloration and method for producing same |
| WO2001083390A1 (en) * | 2000-05-02 | 2001-11-08 | Yamamoto Precious Metal Co., Ltd. | Glass ceramic, use thereof and denture |
| JP2005537848A (en) * | 2002-09-05 | 2005-12-15 | エレファント デンタル ベー．フェー． | Reinforced ceramic restoration |
| JP2008513343A (en) * | 2004-09-21 | 2008-05-01 | フォルシュングスツェントルム カールスルーエ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Dental ceramics and method for producing the dental ceramics |
| JP2014039830A (en) * | 2008-05-30 | 2014-03-06 | Dentsply Internatl Inc | Integrated porcelain system of dental prosthesis |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56120312U (en) * | 1980-02-16 | 1981-09-12 | ||
| JPS59170016U (en) * | 1983-04-30 | 1984-11-14 | 株式会社クボタ | Tractor water-cooled engine ventilation cooling system |
-
1987
- 1987-06-10 JP JP14746087A patent/JP2561278B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56120312U (en) * | 1980-02-16 | 1981-09-12 | ||
| JPS59170016U (en) * | 1983-04-30 | 1984-11-14 | 株式会社クボタ | Tractor water-cooled engine ventilation cooling system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5466285A (en) * | 1992-03-19 | 1995-11-14 | Noritake Co., Limited | Dental porcelain material preventing yellow coloration and method for producing same |
| WO2001083390A1 (en) * | 2000-05-02 | 2001-11-08 | Yamamoto Precious Metal Co., Ltd. | Glass ceramic, use thereof and denture |
| JP2005537848A (en) * | 2002-09-05 | 2005-12-15 | エレファント デンタル ベー．フェー． | Reinforced ceramic restoration |
| JP2008513343A (en) * | 2004-09-21 | 2008-05-01 | フォルシュングスツェントルム カールスルーエ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Dental ceramics and method for producing the dental ceramics |
| JP4838803B2 (en) * | 2004-09-21 | 2011-12-14 | フォルシュングスツェントルム カールスルーエ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Dental ceramics and method for producing the dental ceramics |
| JP2014039830A (en) * | 2008-05-30 | 2014-03-06 | Dentsply Internatl Inc | Integrated porcelain system of dental prosthesis |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2561278B2 (en) | 1996-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5314334A (en) | Dental procelain bond layer for titanium and titanium alloy copings | |
| US5591030A (en) | Dental ceramic restoration using a multi-layered structure | |
| DE3248357A1 (en) | POWDER-SHAPED DENTAL MATERIAL, METHOD FOR THE PRODUCTION THEREOF AND ITS USE | |
| US5423680A (en) | Palladium, gallium and copper-free alloy having high thermal expansion coefficient | |
| JPS63310805A (en) | Baking porcelain for dental use having high resistance to yellowing | |
| US4741699A (en) | Uniformly fluorescing porcelain dental restorations | |
| JPH04227769A (en) | Coating spinel colored pigment, preparation thereof and decoration with impoved outline clarity | |
| US5466285A (en) | Dental porcelain material preventing yellow coloration and method for producing same | |
| US6087282A (en) | Non-greening porcelain compositions | |
| US4645455A (en) | Uniformly fluorescing porcelain dental restorations | |
| US5030097A (en) | Method using a colloidal suspension of the rare earth oxide as a wetting agent and a suspending agent for making dental porcelains | |
| US2846325A (en) | Refractory vitreous ceramic coating materials | |
| WO2001055465A1 (en) | Dental alloys | |
| US3046248A (en) | Method of preparing solid elastomers from uncured liquid organic polythiopolymercaptan polymers | |
| US4518564A (en) | Gallium and silver free, palladium based dental alloys for porcelain-fused-to-metal restorations | |
| DE2402244C2 (en) | Process for the manufacture of a lamp glass envelope | |
| DE3108942C2 (en) | Refractories, molten and cast materials of the type Cr ↓ 2 ↓ O ↓ 3 ↓ - Al? 2? 0? 3? - Zr0? 2? and their use for lining glass melting furnaces | |
| US4693748A (en) | Composition for staining material | |
| JP3039787B2 (en) | Calcium phosphate glass and crystallized glass | |
| SU405840A1 (en) | V-PTB 1 | |
| JPH035410A (en) | Dental ceramic material for preventing yellowing | |
| JP7507332B1 (en) | Dental porcelain | |
| CH679369A5 (en) | ||
| JPH0311005A (en) | Production of porcelain for dentist containing yellowing-preventing sb2o3 | |
| DE698098C (en) | Process for making glass resistant to metal vapor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070919 Year of fee payment: 11 |