CA2211520A1 - Method for manufacturing a ceramic dental replacement - Google Patents
Method for manufacturing a ceramic dental replacementInfo
- Publication number
- CA2211520A1 CA2211520A1 CA002211520A CA2211520A CA2211520A1 CA 2211520 A1 CA2211520 A1 CA 2211520A1 CA 002211520 A CA002211520 A CA 002211520A CA 2211520 A CA2211520 A CA 2211520A CA 2211520 A1 CA2211520 A1 CA 2211520A1
- Authority
- CA
- Canada
- Prior art keywords
- pin
- ceramic
- thermal expansion
- zro2
- expansion coefficient
- 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.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/225—Fastening prostheses in the mouth
- A61C13/30—Fastening of peg-teeth in the mouth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/08—Artificial teeth; Making same
- A61C13/083—Porcelain or ceramic teeth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
- A61K6/818—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/831—Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
- A61K6/833—Glass-ceramic composites
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Plastic & Reconstructive Surgery (AREA)
- Dental Preparations (AREA)
- Dental Prosthetics (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Glass Compositions (AREA)
Abstract
A method for manufacturing a ceramic dental replacement includes providing a pin and attaching a ceramic material to the pin to form a ceramic body. The thermal expansion coefficient of the pin, measured at 20° C to 500° C is selected to be identical to or up to 3.0 µm/mK greater than a thermal expansion coefficient of the ceramic body, measured at 20° C to 600° C.
Description
METI IC~D FOR MANUFAGTURING A CF~AMIC DI~NT~L
REPI~CE~EI'IT
Background of the Inven~ion The present invention rel~tes to a method for manufacturing a ceramic dental replacement comprised of a ZrO2 pin and a ZrO2 ceramic gla~s material, to a ceramic dental replacement as described, and to i~s use.
In the past, metallic pins and metallic base rnaterials have been used as pin-b~sed dental replacements, ~ecause of special mater;al properties and because of manuf~cturing considerations.
Such conventional pin-based ~ystems are, for example, known from M. Simon, "Neue Persp~ktiven zur vollkeramischen Stabilisierun~ und zum Al~fbau devitaler Zahne", Quintessenz 46, p~ges 1085-1101 (19~5) ~nd ~rom: 1:). Kaelin und P. Scarer~
"Aufbausysteme in der Kronen- und Br~ckenprothetik", Schweiz ~\/lonatsschr. ~ahnmed. Vol. 101. pp. 457~63 (1991). The covering of the,substructure ~vith plastic or cer~mic w~s then separately carried out. The known solutions however exhibit a series of problems, for exampie, corrosion of certain metals or metal alloys and their deposit in the surrounding tissue, 196 30 412.1 - IVOCLM A~; . 26~7~1-18.1~0 inflammation of the gingiY~ or dark discolorations of the surrounding soft and hard tissue due to the opaque properlies of metallic materiats. For these reasons, in the recent past metal constructions have been used less and less, while transpatent materials with an impro~ed vis~al appearance and biocompatibili~y have been used increasingly.
~ irconium diox;de pins have an especially high mechanical strength as d;~closed, for example, in 1<. H. Meyenberg, H. L~thy and P. ~ch~rer, "Zirconia Posts: A New All C:eramic Concept for Nonvital Abutment Teeth", Journal of Esthetic Dentist~, Vol. 7, No. 2, (1995) and the aforementioned refer~nce Quintessenz 46, iO85-1101, (1995). For manufacturing dental repla~enents the ZrO~ root pin is inserted and a composite construGtion is at~açhed.
In the dental iaboratory ~ crown, for example, of IPS Empress Keramik (trademark of iYoclarl Schaan, Liechtenstein) is manufactured and attached in ~ conventional nlanner, for example, with an adhesive system and a transparent composite cement. Such solutions have a very good biocompatibil;ty because metallic m~lerials have been avoided. However, an improve~' strength would be desirable.
~ rom I .S. Patent 4,936,776 different dental replace,nent~
19~ 30 412.1 ~ R AG ~57 11~
. CA 02211520 1997-07-25 of tr~nsparent porcelain oeramic materials are known. According to one ernbodiment, to a transparent ceramic pin a porcelain cerarnic is fused (by firing in ~ furnace~. I lowever, the construction disclosed in U.S. P~tent 4,936,775 with ~he fused porcelain ceramic crown exhibits low load resistance due to a low breaking resistance.
It has also been suggested to fuse to ~ known metal pin ceramic construction ancl to cement thereto a ceramic crown.
However, this design exhibits the problem of tension fractutes within the ceramic, as has been disclosed in the afore"~e"lioned reference Schweiz. Mon~tssGhr. Z:ahnmed. Vol. 101 (19g1).
It is therefore an object of the present invention to provide, while avoiding the disadvantages of the prior art, a method for manufacturing a cer~rniG dental replacement comprised oS a high ~trength pin, especially a ZrO2 pin, and a ~eramic base body fused thereto. especially a ZrO2 ceramic glass material with excellent mech~ni¢al properties whereby it is clesired to produoe very stable and securely fused dental replacements having excellent strength, especially flexural strength and tensile strength, without exhibiting tensional fractures.
Summary of the Invention 19830412,1~OCU~AG~2657-11-1C1~0 CA 022ll520 l997-07-25 A method for manufacturing a ceramic dental replacement includes the following steps:
proYiding a pin;
attaching a ceramic material to the pin to form 3 ceramic body on the pin;
selecting a thermal expansion coer~ci~nt of the pin, measured at 20~ C to 500~ C to be identical or up to ~.0 ~rm/mK
greater than a thermal expansion coefficient of the ceramic body, measured at 20~ C to 500~ ~.
The ~hermal exp~nsion coefficient of the pirl is up to 2.0 ,ctm/mK greater than the thermal expansion coefficient of the ceramic body.
The method may further include ~ step of preparing the pin of i~rO2.
~ dvanta~eousiy, the method further inoludes the step of preparing the pin of a ceramic material.
Advantageou~ly, the method further includes ~ step of selecting a 7rO2 ceramic glass m~terial for the ceramic body.
Preferably, the thermal expansion coefficient of the pin is 0.2 to 2.0 ,um/mK greater th~n the thermal expansion coefficient of the ceramic body.
1~6 3~ 412,1 ~ lVOCLARAG - 2657-11-18.1~0 CA 022ll520 l997-07-25 The therrnal expansion coeffic;ent of the pin is about 11 ~ ~mlmK and ~he thermal expansion coefficient of the ~eram;c body is about 9.5,um/mK.
Advant~geously, a ZrO2 glass bl~nk is used as the ceramic material, whereby the bl~nk has a melting point that is tower than the meltlng point of the pin.
In the ~tep of attaching, the ceramic material is directly fused onto the pin.
~ dvantageously, the step of at:taching includes heating the ceramic material for p3asticiz;ng the ceramic material, thereafter pressing the ceramic m~terial into a mol~! sintering the cer~mic material in the mold, and Gooling the ceramic material.
Prefer~bly, the step of pressing is performed at a ~emperature of 1000~ C or less.
The step of att~ching m~y include:
preparing a precisely sized model of the dental replacernent of the pin and of a meltable molding material;
~ pplying a s~rand of the meitable molding material to the model;
placing the model and the s~rand into a curable potting compound;
196 3~ 412.1 - IVOCLAR AG ~ 2~57~1~.18~
CA 022ll520 l997-07-25 heating the meltable molding materiai for removing the meltable molding m~terial from the potting compound ~uch that a mold for the cer~mic body is formed, wherein the remoYed strand leaves behind a casting channel in the potting compound introducing the ceramic material into the mold through the castin~ channel;
arranging a piston at the casting channel and pressurizing the ceramic m~terial by the piston for pressing the ceramic material under thermal pl~tici~tion into the moid.
Advantageously, the step of pressing is perfo~med at a temperature of 1000~ C or iess.
Th~ pin is ~ pref~bricated, parti~ily stabilized ZrO2 pin.
The pin preferably has a flexural stren~th of at least 600 MPa preferably o~ 800 to 1500 MPa.
The ceramic dental replac~ment preferably has a flexural strength of l~ast 100 MPa.
The presPnt inYention also relates to a ceramic dental replacement comprised of ~ ZrO2 ceramic glass bocly and a ZrO2 pin, wherein the thermal expansion coefficient of the pin, measured at 20~ C to 500~ C, is identical to or up to 3.0 ,umlmK
greater than a therrnal expansion coefficient of the ceramic glas 1~6 30 412.1 ~ IVOCLAR A~; - 2657-11.18,190 body measured at 20~ C to 500~ C
The invention also relates t~ a method of using the ceramic dental replac~men~ described above for reconstructing missing tooth substanoe of vital and non-vital teeth. Preferably, a root, a Grown, a neck, or the crown and neck of a tooth ~re reconstructe~
with th~ inventive method.
A special advantage of the present invention is that an excellent over~ll strength of the dent~l repl~cement can ~e achieved wit~out having to use metal pins of high stren~th that haYe been used in the past ~nd without having to contend with th aforementioned disadvantages, for example, insuffi~ient biological compatibility, uns~tis~ctory ~esthetical appearanGe, corrosion etc.
The inventively produoed dental replacernent exhibit in addition to excellent biological compatibility, an excellent aesthetical appea~nce, very simil~r to the appear~nce of a natural to~th. They also h~ve ~ very good strength properties.
The excellent physical properties ~n be related to ~ plurality o~
factors. First of all, the use ~f Zr~2 pins results in ~n especi~lly great fle~ural strength of the dental replaoe~ent within the tooth root. Furthermore, by using ZrO2 ceramic glass materi~ls the dental replacement facing the tooth crown ~Iso exhibits an ~86 30 ~12.1 . IVOCIAR AG - 2~57-11-1~.180 -especially high mechani~al lo~ding resistance.
Furthermore, the inventive selection of the thermal expansion coefficient of the ZrO2 pin and the Zl-~2 ceramic glass m~terial due to their material comp~tibility in conne tion with the pressing step, results in an especially intimate stabl~ fusing or connection.
In compari~on to conventional ~dhesive connsctions, respectively, cementing, the overall st~bility of the dental replacement is considerably increased. Not only the excellent adhesion between ZrO2 and ZrO2-containing ceramic glass maieria~s is taken advant~ge o~. Since the ~pplication of the 7rOz ceramic glass material is c~rried out under pressure, the ;ntimate connection o~ the two components is reinforced. The pressing action of the ZrO2 ceramic glass material onto the pin can only be effective when the thermal expansion coefficient of the ZrO2 pin correspon~ a; least substantially to that of the ZrO2 ce~amic glass m~terial.
An especially advantageous and surprising effect results when the ZrO2 pin upon cooling due to the higher heat expans;on coefficient, will contract to a greater extent th~n the surrounding ZrO2 ceramic glass material. Thus results, a~er the ZrO2 cer~mic 196 30 412.1 ~ AR AG - 2657-11-18,1~0 gla~s material has been pressed onto the i~rO~ ~in, 3 certain tension results bety~feen the two componen~ whereby the ZrO2 ceramic glass material pressecl onto the ZrO2 pin due to the contracbon of the pin, is pressurized (tensioned) similar to reinfot~ed concrete.
It was surprisingly ~ound that this improves the mechani~al properties of the ceramic dental replacement. For example, the inventi~e dental replacements have an excenent overall flexural strength, exhibit no tensional f~ctures, and, in general, h~ve an especiaily high resistance to the forces acting onto dental repl~cements during chewing. Surprisin~ly, ~he inventive stiffness and strength is ensured despite the different material selection ~or ~he ZrO2 pin and the ZrO2 cer~mic glass material used for the ceramic body. The overall flexural strength is the strength exhibited by the ZrOz pin with fused ZrO2 ceramic glass body.
~ or a certain dif~erence between the thermal expansion coefficients of the ZrO2 pin ~nd the ZrO2 ceramic glass material ~ractures may occur during pressing. This critical difference between the thermal expansion coefficients depends in individual c~ses on the selected ZrO2 ceramic gl~ss ma~erial ancl the selected ZrO2 pin. In general, however these problemc will not 196 ~0 412,1 IVOCIARAG ~ 285711-18.190 CA 022ll520 l997-07-25 occur when the thermal expansion coefficient of the ZrO2 pin is more than approximately 2 ~Im/mK above the thermal expansion coer~ic;~ of the ZrO2 ceramic glass material or ~he diffe~ence between the thermal expansion coefficients should, in general, be greater than 2 ,~rmlmK.
A further adv~n~age of the invention is the savings in time because of the manufa~ture o~ the cornplete dental repl~cement during the firing process. Accordingly, a sep~rate cernenting or adhesive attachment of the Geramic bocly onto the pin to be inserted into the root is avoided. Furthermore, sometimes occurring negative p~tient reactions to the used materi~ls can be avoided. Finally, the inventively pro~uced dent~l replacements have an especially pleasing aesthetic ~ppearanoe beG~use they are very s~milar to a natural tooth, have a continuous transluce~lt structure in one piece and can thus be mat~hecl as closely ~.
possi~le to the visual appearance of natur~l dentin, respectively, tooth enamel.
Dental replacement, in the oontext of thc present invention, relates to any shaped tooth replacement construction that inciudes a combin~tion of a pre-fabricated or indiYidually formed pin with any suitable ceramic body sele~ted depending on the intended 1~ 30 412.1 - rVOCLAR A~ 2657-11-18.7~o CA 022ll520 l997-07-25 -use of the dental replacement, i.e., a partial or a full dental crown.
It was found that the inventive ~dvantages can be re~lized especially easily when the thermai expansion coefficient of the Zr~2 pin is 0.5 to Z.O ,~rm/mK above the thermal expansion coefficient of the ZrO2 ceramic glass m~terial.
According ~ a preferred embodiment the ZrO2 pin has a thermal expansion coefficient of approximately 11 ,~nntmK and the ZrO~ ceramic ~lass material has a heat expansion coefficient of approxirnately 9.5 ,umlmK.
Inventively, ZrO2 pins are defined as ~eramic ~root) pins made of zirconium dioxide ~rhich, however, c~n also be partially st~bili~ed with yttrium oxide (~pproximately 3 to ~ weight-% Y203).
Such ceramic materials result in an especially good adhesion to the ZrO2-containing ceramic glass m~terials.
In the present invention it is posslble to use any suitable ZrO2-containing ceramic glass material with sufficient mechanic~l properties and respectively selected thermal expansion coerricients~ For exa",pl~, the ZrO2 ceramic ~lass materials disclosed in German Patent 44 23 7g4 are suitable, and the disclosure of this patent is enclosed ~y reference in this specification.
1g~ 30 412.1 ~ NOCLAR AG ~ z657-tl 10.190 CA 022ll520 l997-07-25 In a preferred embodiment the pressing of the ZrO2 ceramic gl~ss material is carried out in ~ ceramic pressing method whereby the ZrO2 ceramic gla~s material may be present initially in the form of a bl~nk.
It was found th~t ~or the instant invention especialty good results can be achieved when during the ceramic pressing method the ZrO2 ceramio glass material is provided in the form of a ceramic blank that is plasiticized by heating, is pressecl under pressure into the hollow mold, sintered and hardened cluring cooling. This ensures th~t the ZrO2 ceramic glass rnaterial can be pressed in the plasticized state especially well onto the ZrO2 pin and that during subsequent sintering and ~ooling ~n especially intimate connection is formed so that the a~orementioned advantageous effects can be reali~ed by applying pressure durin~
manufacturing.
The ceramic pressing me~hod disclosed in Europe~n Patent Application 0 231 773 and the furnaces used in connection tl-ere~ith pro~ride ve~ goocl results in connection with the inventive method. With respect to a more ~etaiied description of the method and the furnaces used in this context, the ~i~closure of the European Patent Applioation is herewith incorporated by 19~ 30 412~1 I'VOCU~R AG 2657-ll-18.190 reference into the specification. Such a method, respectively, such devices are for example, also used in the IPS-Empress method (trademark of Ivoclar, Shaan, Liechtenstein).
For example, a typical inventive method may include the following method step~ whereby, clepending on the intended use, it is possible to incorporate suitable modifications.
1. Impression o~ the p~tients mouth with inserted ceramic root pin;
REPI~CE~EI'IT
Background of the Inven~ion The present invention rel~tes to a method for manufacturing a ceramic dental replacement comprised of a ZrO2 pin and a ZrO2 ceramic gla~s material, to a ceramic dental replacement as described, and to i~s use.
In the past, metallic pins and metallic base rnaterials have been used as pin-b~sed dental replacements, ~ecause of special mater;al properties and because of manuf~cturing considerations.
Such conventional pin-based ~ystems are, for example, known from M. Simon, "Neue Persp~ktiven zur vollkeramischen Stabilisierun~ und zum Al~fbau devitaler Zahne", Quintessenz 46, p~ges 1085-1101 (19~5) ~nd ~rom: 1:). Kaelin und P. Scarer~
"Aufbausysteme in der Kronen- und Br~ckenprothetik", Schweiz ~\/lonatsschr. ~ahnmed. Vol. 101. pp. 457~63 (1991). The covering of the,substructure ~vith plastic or cer~mic w~s then separately carried out. The known solutions however exhibit a series of problems, for exampie, corrosion of certain metals or metal alloys and their deposit in the surrounding tissue, 196 30 412.1 - IVOCLM A~; . 26~7~1-18.1~0 inflammation of the gingiY~ or dark discolorations of the surrounding soft and hard tissue due to the opaque properlies of metallic materiats. For these reasons, in the recent past metal constructions have been used less and less, while transpatent materials with an impro~ed vis~al appearance and biocompatibili~y have been used increasingly.
~ irconium diox;de pins have an especially high mechanical strength as d;~closed, for example, in 1<. H. Meyenberg, H. L~thy and P. ~ch~rer, "Zirconia Posts: A New All C:eramic Concept for Nonvital Abutment Teeth", Journal of Esthetic Dentist~, Vol. 7, No. 2, (1995) and the aforementioned refer~nce Quintessenz 46, iO85-1101, (1995). For manufacturing dental repla~enents the ZrO~ root pin is inserted and a composite construGtion is at~açhed.
In the dental iaboratory ~ crown, for example, of IPS Empress Keramik (trademark of iYoclarl Schaan, Liechtenstein) is manufactured and attached in ~ conventional nlanner, for example, with an adhesive system and a transparent composite cement. Such solutions have a very good biocompatibil;ty because metallic m~lerials have been avoided. However, an improve~' strength would be desirable.
~ rom I .S. Patent 4,936,776 different dental replace,nent~
19~ 30 412.1 ~ R AG ~57 11~
. CA 02211520 1997-07-25 of tr~nsparent porcelain oeramic materials are known. According to one ernbodiment, to a transparent ceramic pin a porcelain cerarnic is fused (by firing in ~ furnace~. I lowever, the construction disclosed in U.S. P~tent 4,936,775 with ~he fused porcelain ceramic crown exhibits low load resistance due to a low breaking resistance.
It has also been suggested to fuse to ~ known metal pin ceramic construction ancl to cement thereto a ceramic crown.
However, this design exhibits the problem of tension fractutes within the ceramic, as has been disclosed in the afore"~e"lioned reference Schweiz. Mon~tssGhr. Z:ahnmed. Vol. 101 (19g1).
It is therefore an object of the present invention to provide, while avoiding the disadvantages of the prior art, a method for manufacturing a cer~rniG dental replacement comprised oS a high ~trength pin, especially a ZrO2 pin, and a ~eramic base body fused thereto. especially a ZrO2 ceramic glass material with excellent mech~ni¢al properties whereby it is clesired to produoe very stable and securely fused dental replacements having excellent strength, especially flexural strength and tensile strength, without exhibiting tensional fractures.
Summary of the Invention 19830412,1~OCU~AG~2657-11-1C1~0 CA 022ll520 l997-07-25 A method for manufacturing a ceramic dental replacement includes the following steps:
proYiding a pin;
attaching a ceramic material to the pin to form 3 ceramic body on the pin;
selecting a thermal expansion coer~ci~nt of the pin, measured at 20~ C to 500~ C to be identical or up to ~.0 ~rm/mK
greater than a thermal expansion coefficient of the ceramic body, measured at 20~ C to 500~ ~.
The ~hermal exp~nsion coefficient of the pirl is up to 2.0 ,ctm/mK greater than the thermal expansion coefficient of the ceramic body.
The method may further include ~ step of preparing the pin of i~rO2.
~ dvanta~eousiy, the method further inoludes the step of preparing the pin of a ceramic material.
Advantageou~ly, the method further includes ~ step of selecting a 7rO2 ceramic glass m~terial for the ceramic body.
Preferably, the thermal expansion coefficient of the pin is 0.2 to 2.0 ,um/mK greater th~n the thermal expansion coefficient of the ceramic body.
1~6 3~ 412,1 ~ lVOCLARAG - 2657-11-18.1~0 CA 022ll520 l997-07-25 The therrnal expansion coeffic;ent of the pin is about 11 ~ ~mlmK and ~he thermal expansion coefficient of the ~eram;c body is about 9.5,um/mK.
Advant~geously, a ZrO2 glass bl~nk is used as the ceramic material, whereby the bl~nk has a melting point that is tower than the meltlng point of the pin.
In the ~tep of attaching, the ceramic material is directly fused onto the pin.
~ dvantageously, the step of at:taching includes heating the ceramic material for p3asticiz;ng the ceramic material, thereafter pressing the ceramic m~terial into a mol~! sintering the cer~mic material in the mold, and Gooling the ceramic material.
Prefer~bly, the step of pressing is performed at a ~emperature of 1000~ C or less.
The step of att~ching m~y include:
preparing a precisely sized model of the dental replacernent of the pin and of a meltable molding material;
~ pplying a s~rand of the meitable molding material to the model;
placing the model and the s~rand into a curable potting compound;
196 3~ 412.1 - IVOCLAR AG ~ 2~57~1~.18~
CA 022ll520 l997-07-25 heating the meltable molding materiai for removing the meltable molding m~terial from the potting compound ~uch that a mold for the cer~mic body is formed, wherein the remoYed strand leaves behind a casting channel in the potting compound introducing the ceramic material into the mold through the castin~ channel;
arranging a piston at the casting channel and pressurizing the ceramic m~terial by the piston for pressing the ceramic material under thermal pl~tici~tion into the moid.
Advantageously, the step of pressing is perfo~med at a temperature of 1000~ C or iess.
Th~ pin is ~ pref~bricated, parti~ily stabilized ZrO2 pin.
The pin preferably has a flexural stren~th of at least 600 MPa preferably o~ 800 to 1500 MPa.
The ceramic dental replac~ment preferably has a flexural strength of l~ast 100 MPa.
The presPnt inYention also relates to a ceramic dental replacement comprised of ~ ZrO2 ceramic glass bocly and a ZrO2 pin, wherein the thermal expansion coefficient of the pin, measured at 20~ C to 500~ C, is identical to or up to 3.0 ,umlmK
greater than a therrnal expansion coefficient of the ceramic glas 1~6 30 412.1 ~ IVOCLAR A~; - 2657-11.18,190 body measured at 20~ C to 500~ C
The invention also relates t~ a method of using the ceramic dental replac~men~ described above for reconstructing missing tooth substanoe of vital and non-vital teeth. Preferably, a root, a Grown, a neck, or the crown and neck of a tooth ~re reconstructe~
with th~ inventive method.
A special advantage of the present invention is that an excellent over~ll strength of the dent~l repl~cement can ~e achieved wit~out having to use metal pins of high stren~th that haYe been used in the past ~nd without having to contend with th aforementioned disadvantages, for example, insuffi~ient biological compatibility, uns~tis~ctory ~esthetical appearanGe, corrosion etc.
The inventively produoed dental replacernent exhibit in addition to excellent biological compatibility, an excellent aesthetical appea~nce, very simil~r to the appear~nce of a natural to~th. They also h~ve ~ very good strength properties.
The excellent physical properties ~n be related to ~ plurality o~
factors. First of all, the use ~f Zr~2 pins results in ~n especi~lly great fle~ural strength of the dental replaoe~ent within the tooth root. Furthermore, by using ZrO2 ceramic glass materi~ls the dental replacement facing the tooth crown ~Iso exhibits an ~86 30 ~12.1 . IVOCIAR AG - 2~57-11-1~.180 -especially high mechani~al lo~ding resistance.
Furthermore, the inventive selection of the thermal expansion coefficient of the ZrO2 pin and the Zl-~2 ceramic glass m~terial due to their material comp~tibility in conne tion with the pressing step, results in an especially intimate stabl~ fusing or connection.
In compari~on to conventional ~dhesive connsctions, respectively, cementing, the overall st~bility of the dental replacement is considerably increased. Not only the excellent adhesion between ZrO2 and ZrO2-containing ceramic glass maieria~s is taken advant~ge o~. Since the ~pplication of the 7rOz ceramic glass material is c~rried out under pressure, the ;ntimate connection o~ the two components is reinforced. The pressing action of the ZrO2 ceramic glass material onto the pin can only be effective when the thermal expansion coefficient of the ZrO2 pin correspon~ a; least substantially to that of the ZrO2 ce~amic glass m~terial.
An especially advantageous and surprising effect results when the ZrO2 pin upon cooling due to the higher heat expans;on coefficient, will contract to a greater extent th~n the surrounding ZrO2 ceramic glass material. Thus results, a~er the ZrO2 cer~mic 196 30 412.1 ~ AR AG - 2657-11-18,1~0 gla~s material has been pressed onto the i~rO~ ~in, 3 certain tension results bety~feen the two componen~ whereby the ZrO2 ceramic glass material pressecl onto the ZrO2 pin due to the contracbon of the pin, is pressurized (tensioned) similar to reinfot~ed concrete.
It was surprisingly ~ound that this improves the mechani~al properties of the ceramic dental replacement. For example, the inventi~e dental replacements have an excenent overall flexural strength, exhibit no tensional f~ctures, and, in general, h~ve an especiaily high resistance to the forces acting onto dental repl~cements during chewing. Surprisin~ly, ~he inventive stiffness and strength is ensured despite the different material selection ~or ~he ZrO2 pin and the ZrO2 cer~mic glass material used for the ceramic body. The overall flexural strength is the strength exhibited by the ZrOz pin with fused ZrO2 ceramic glass body.
~ or a certain dif~erence between the thermal expansion coefficients of the ZrO2 pin ~nd the ZrO2 ceramic glass material ~ractures may occur during pressing. This critical difference between the thermal expansion coefficients depends in individual c~ses on the selected ZrO2 ceramic gl~ss ma~erial ancl the selected ZrO2 pin. In general, however these problemc will not 196 ~0 412,1 IVOCIARAG ~ 285711-18.190 CA 022ll520 l997-07-25 occur when the thermal expansion coefficient of the ZrO2 pin is more than approximately 2 ~Im/mK above the thermal expansion coer~ic;~ of the ZrO2 ceramic glass material or ~he diffe~ence between the thermal expansion coefficients should, in general, be greater than 2 ,~rmlmK.
A further adv~n~age of the invention is the savings in time because of the manufa~ture o~ the cornplete dental repl~cement during the firing process. Accordingly, a sep~rate cernenting or adhesive attachment of the Geramic bocly onto the pin to be inserted into the root is avoided. Furthermore, sometimes occurring negative p~tient reactions to the used materi~ls can be avoided. Finally, the inventively pro~uced dent~l replacements have an especially pleasing aesthetic ~ppearanoe beG~use they are very s~milar to a natural tooth, have a continuous transluce~lt structure in one piece and can thus be mat~hecl as closely ~.
possi~le to the visual appearance of natur~l dentin, respectively, tooth enamel.
Dental replacement, in the oontext of thc present invention, relates to any shaped tooth replacement construction that inciudes a combin~tion of a pre-fabricated or indiYidually formed pin with any suitable ceramic body sele~ted depending on the intended 1~ 30 412.1 - rVOCLAR A~ 2657-11-18.7~o CA 022ll520 l997-07-25 -use of the dental replacement, i.e., a partial or a full dental crown.
It was found that the inventive ~dvantages can be re~lized especially easily when the thermai expansion coefficient of the Zr~2 pin is 0.5 to Z.O ,~rm/mK above the thermal expansion coefficient of the ZrO2 ceramic glass m~terial.
According ~ a preferred embodiment the ZrO2 pin has a thermal expansion coefficient of approximately 11 ,~nntmK and the ZrO~ ceramic ~lass material has a heat expansion coefficient of approxirnately 9.5 ,umlmK.
Inventively, ZrO2 pins are defined as ~eramic ~root) pins made of zirconium dioxide ~rhich, however, c~n also be partially st~bili~ed with yttrium oxide (~pproximately 3 to ~ weight-% Y203).
Such ceramic materials result in an especially good adhesion to the ZrO2-containing ceramic glass m~terials.
In the present invention it is posslble to use any suitable ZrO2-containing ceramic glass material with sufficient mechanic~l properties and respectively selected thermal expansion coerricients~ For exa",pl~, the ZrO2 ceramic ~lass materials disclosed in German Patent 44 23 7g4 are suitable, and the disclosure of this patent is enclosed ~y reference in this specification.
1g~ 30 412.1 ~ NOCLAR AG ~ z657-tl 10.190 CA 022ll520 l997-07-25 In a preferred embodiment the pressing of the ZrO2 ceramic gl~ss material is carried out in ~ ceramic pressing method whereby the ZrO2 ceramic gla~s material may be present initially in the form of a bl~nk.
It was found th~t ~or the instant invention especialty good results can be achieved when during the ceramic pressing method the ZrO2 ceramio glass material is provided in the form of a ceramic blank that is plasiticized by heating, is pressecl under pressure into the hollow mold, sintered and hardened cluring cooling. This ensures th~t the ZrO2 ceramic glass rnaterial can be pressed in the plasticized state especially well onto the ZrO2 pin and that during subsequent sintering and ~ooling ~n especially intimate connection is formed so that the a~orementioned advantageous effects can be reali~ed by applying pressure durin~
manufacturing.
The ceramic pressing me~hod disclosed in Europe~n Patent Application 0 231 773 and the furnaces used in connection tl-ere~ith pro~ride ve~ goocl results in connection with the inventive method. With respect to a more ~etaiied description of the method and the furnaces used in this context, the ~i~closure of the European Patent Applioation is herewith incorporated by 19~ 30 412~1 I'VOCU~R AG 2657-ll-18.190 reference into the specification. Such a method, respectively, such devices are for example, also used in the IPS-Empress method (trademark of Ivoclar, Shaan, Liechtenstein).
For example, a typical inventive method may include the following method step~ whereby, clepending on the intended use, it is possible to incorporate suitable modifications.
1. Impression o~ the p~tients mouth with inserted ceramic root pin;
2. Manufacture of a model from the impression, whereby the pin projects from the model;
3. Shaping a to~th reconstruction o~ a mel~able mot~ing materfal, preferably wax or plastic, on the pin (for exampie in th~
f~rm of a crown stump or a partial or full dental crown);
~ . Applying a wax pin or a strand which l~ter on will provide the casting channel;
5. Emb~dding p;n and wax parts into a mlJme furnace with a curable potting material;
6. Removing the wax, re~pectively, the meltable moldlng material by heating;
7. Performing the actual ceramic pressing method, for example, according to European Patent Application 0 231 773, 1~6 3~ 412.1 IVOCIAR AG 2~57~ .l9o CA 022ll520 l997-07-25 whereby the ZrOz ceramic 9i;~lS5 material is introduced via the casting chanr~el (in the fo~m of a bl~nk), is plast~cized by heating, and pressurized by a piston provided at the casting channel, and is hardened during cooling whereby the ZrO2 pin has ~ thermal expansion ~o~rl~ nt that is at most twice as high as the thermal expansi~n co~fl~rient of the ZrO2 cer~mic ~lass material.
Pressure can be ~pplied with a const~nt v~lue or with changing values or also by intermittent application.
It is especially advantageous that in the inventive method reIatively low Firing temperatures are used, in general below 1200~
C, preferably even below 1000~ C. ~his allows for a f~vorable and inexpensive method.
Furthermore, less complicated furnaces are sufficient ~nd the heating period is reduced.
In a p¢eferred embodiment of the invention the ZrO2 pin has flexu~l strength of at least ~00 MPa, especi~lly of 800 to 1~00 MPa. Th~s, the used ZrO2 pins in th~ir flexural strengtl~ ~re within the r~nge of highly resistant, conventionally used metal pins or exhibit even gre~ter strength. In the inventiYely manufactured ceramic denta~ replacements this high flexural strength is especially favorable with respect to the overall flexural strength of 1~6 3~ 412.1 ~ IVOCUA AG 265t 11 -8.~80 the dental replace~lenl~ so preferably ~verall flexural sll~n~Shs of at least 100 MPa can be achieved.
According to a ~urther aspect of the invention ~ dental repiacement, preferably manufactured according to the method disclosed herein, is als~ claimed.
Acc~rding to another aspect, the present invention also relates to the use of a ceramic dental ~epl3cement as a ~ent~l product. Furthermore, the method of use includes any suitable application within dentistry, for example, the reconstruc~ion of missing hard tooth parts in \rital or non-vital teeth. Conventional applications include dental reconstru~tions such as tooth root reconstruction with parti~l or full dental crowns.
Description ~ ~referre~ Embodiment The present invention will now be de~cribed in detail with aid of a particular em~odiment.
A Biopost root pin (trademark of Incermed S.A., Lausanne, Swit~erl~nd) of the suitable size made of zirconium dioxide was used. The pin was in~roduced into the conventionally prepared root canal and an impression of the patient's mouth was taken.
Subsequently, a model of a superhard ~ypsum material was produced from the impression whereby the pin projects from the 196 30 41Z.1 ~ IYOCIAR A13 - 2657~ 8~190 model. B~sed on this model, a crown of wax was modeled onto the pin whereby the wax was a material that can removed by heating without leaving any residue. The pin was conditioned with Al2 o3.
The model ~as then introduced into an IPS-Empress muffle base (t~demark of Ivocla~). It is possible to position ~ plurali~y of su~h models onto the base of the muffle furnace whereby the spa~ing between the models in this technique must be at least 3 mm. Subse~uently, the muffle base was enclosed by a paper cylinder and the models including the Zr~2 pins were embedded into an IPS~Em~ress potting compound. ARer the prescribed curing time, the muffle enclosure and the muffle bas~ were removed by a rotational moven~ent and the p~per enclosure was removed, whereby it was ensured that no potting ma~erial remains within the casting ch~nnel.
The thus prepared muffle w~s introduced into a preheating furnace and prehe3ted together with a AlOx-piston as disclosed in the manual o~ IPS~Empress published ~y Ivoclar. The ZrO~ blank was heated separately. The 2rO2 ce~amic glass material is of the composition disclosed in Gerrnan Patent 44 23 794 in Example 1 ~nd has the following weight percen~ composition (in parentheses);
19~ S~ 41;2.1 ~ IVOCLAR AG - 2657~ 18.190 SiO2 (5~.8), Al203 (3.0), Li20 ~1~.9), P~Os (10.4), ZrOz (20.9).
After completion of the preheating phase the ZrO2glass ceramiG
blank was inserted into the casting channel and subsequently the AlOx piston ~s in~e~ed into the casting channei. The cer~mic pressing method was perfonned at 950~ C and a pressure of 5 bar. After cooling, the object (dental replacement) was removed in a conYentional manner from the mufFle and cleaned. It could be directly introduced into the tooth cavity, optionally after small shape corrections, painting, and glazing.
The present invention is, of course, in no way resll i,,led to the specific disclosure of the specific~tions, and drawings, but also ~ncomp~sses any modifications within the scope of the appended claims.
196 3D 4l2.~ A6 - 205'~ 18.1~!0
f~rm of a crown stump or a partial or full dental crown);
~ . Applying a wax pin or a strand which l~ter on will provide the casting channel;
5. Emb~dding p;n and wax parts into a mlJme furnace with a curable potting material;
6. Removing the wax, re~pectively, the meltable moldlng material by heating;
7. Performing the actual ceramic pressing method, for example, according to European Patent Application 0 231 773, 1~6 3~ 412.1 IVOCIAR AG 2~57~ .l9o CA 022ll520 l997-07-25 whereby the ZrOz ceramic 9i;~lS5 material is introduced via the casting chanr~el (in the fo~m of a bl~nk), is plast~cized by heating, and pressurized by a piston provided at the casting channel, and is hardened during cooling whereby the ZrO2 pin has ~ thermal expansion ~o~rl~ nt that is at most twice as high as the thermal expansi~n co~fl~rient of the ZrO2 cer~mic ~lass material.
Pressure can be ~pplied with a const~nt v~lue or with changing values or also by intermittent application.
It is especially advantageous that in the inventive method reIatively low Firing temperatures are used, in general below 1200~
C, preferably even below 1000~ C. ~his allows for a f~vorable and inexpensive method.
Furthermore, less complicated furnaces are sufficient ~nd the heating period is reduced.
In a p¢eferred embodiment of the invention the ZrO2 pin has flexu~l strength of at least ~00 MPa, especi~lly of 800 to 1~00 MPa. Th~s, the used ZrO2 pins in th~ir flexural strengtl~ ~re within the r~nge of highly resistant, conventionally used metal pins or exhibit even gre~ter strength. In the inventiYely manufactured ceramic denta~ replacements this high flexural strength is especially favorable with respect to the overall flexural strength of 1~6 3~ 412.1 ~ IVOCUA AG 265t 11 -8.~80 the dental replace~lenl~ so preferably ~verall flexural sll~n~Shs of at least 100 MPa can be achieved.
According to a ~urther aspect of the invention ~ dental repiacement, preferably manufactured according to the method disclosed herein, is als~ claimed.
Acc~rding to another aspect, the present invention also relates to the use of a ceramic dental ~epl3cement as a ~ent~l product. Furthermore, the method of use includes any suitable application within dentistry, for example, the reconstruc~ion of missing hard tooth parts in \rital or non-vital teeth. Conventional applications include dental reconstru~tions such as tooth root reconstruction with parti~l or full dental crowns.
Description ~ ~referre~ Embodiment The present invention will now be de~cribed in detail with aid of a particular em~odiment.
A Biopost root pin (trademark of Incermed S.A., Lausanne, Swit~erl~nd) of the suitable size made of zirconium dioxide was used. The pin was in~roduced into the conventionally prepared root canal and an impression of the patient's mouth was taken.
Subsequently, a model of a superhard ~ypsum material was produced from the impression whereby the pin projects from the 196 30 41Z.1 ~ IYOCIAR A13 - 2657~ 8~190 model. B~sed on this model, a crown of wax was modeled onto the pin whereby the wax was a material that can removed by heating without leaving any residue. The pin was conditioned with Al2 o3.
The model ~as then introduced into an IPS-Empress muffle base (t~demark of Ivocla~). It is possible to position ~ plurali~y of su~h models onto the base of the muffle furnace whereby the spa~ing between the models in this technique must be at least 3 mm. Subse~uently, the muffle base was enclosed by a paper cylinder and the models including the Zr~2 pins were embedded into an IPS~Em~ress potting compound. ARer the prescribed curing time, the muffle enclosure and the muffle bas~ were removed by a rotational moven~ent and the p~per enclosure was removed, whereby it was ensured that no potting ma~erial remains within the casting ch~nnel.
The thus prepared muffle w~s introduced into a preheating furnace and prehe3ted together with a AlOx-piston as disclosed in the manual o~ IPS~Empress published ~y Ivoclar. The ZrO~ blank was heated separately. The 2rO2 ce~amic glass material is of the composition disclosed in Gerrnan Patent 44 23 794 in Example 1 ~nd has the following weight percen~ composition (in parentheses);
19~ S~ 41;2.1 ~ IVOCLAR AG - 2657~ 18.190 SiO2 (5~.8), Al203 (3.0), Li20 ~1~.9), P~Os (10.4), ZrOz (20.9).
After completion of the preheating phase the ZrO2glass ceramiG
blank was inserted into the casting channel and subsequently the AlOx piston ~s in~e~ed into the casting channei. The cer~mic pressing method was perfonned at 950~ C and a pressure of 5 bar. After cooling, the object (dental replacement) was removed in a conYentional manner from the mufFle and cleaned. It could be directly introduced into the tooth cavity, optionally after small shape corrections, painting, and glazing.
The present invention is, of course, in no way resll i,,led to the specific disclosure of the specific~tions, and drawings, but also ~ncomp~sses any modifications within the scope of the appended claims.
196 3D 4l2.~ A6 - 205'~ 18.1~!0
Claims (20)
1. A method for manufacturing a ceramic dental replacement, said method comprising the steps of:
providing a pin;
attaching a ceramic material to said pin to form a ceramic body on said pin;
selecting a thermal expansion coefficient of said pin measured at 20°C to 500°C, to be identical to or up to 3.0,µm/mK
greater than a thermal expansion coefficient of said ceramic body measured at 20°C to 500°C.
providing a pin;
attaching a ceramic material to said pin to form a ceramic body on said pin;
selecting a thermal expansion coefficient of said pin measured at 20°C to 500°C, to be identical to or up to 3.0,µm/mK
greater than a thermal expansion coefficient of said ceramic body measured at 20°C to 500°C.
2. A method according to claim 1, wherein said thermal expansion coefficient of said pin is up to 2.0 µm/mK greater than said thermal expansion coefficient of said ceramic body.
3. A method according to claim 1, further including a step of preparing said pin of ZrO2.
4. A method according to claim 1, further including a step of preparing said pin of a ceramic material.
5. A method according to claim 1, further including a step of selecting a ZrO2 ceramic glass material for said ceramic body.
6. A method according to claim 1, wherein said thermal expansion coefficient of said pin is 0.5 to 2.0 µm/mK greater than said thermal expansion coefficient of said ceramic body.
7. A method according to claim 1, wherein said thermal expansion coefficient of said pin is about 11 um/mK and wherein said thermal expansion coefficient of said ceramic body is about 9.5 µm/mK.
8. A method according to claim 1, wherein in said step of attaching a ZrO2 glass blank, having a melting point that is lower than a melting point of said pin, is selected as said ceramic material.
9. A method according to claim 1, wherein in said step of attaching said ceramic material is directly fused onto said pin.
10. A method according to claim 9, wherein said step of attaching includes heating said ceramic material for plasticizing said ceramic material, thereafter pressing said ceramic material into a mold, sintering said ceramic material in said mold, and cooling said ceramic material.
11. A method according to claim 10, wherein said step of pressing is performed at a temperature of 1000°C or less.
12. A method according to claim 9, wherein said step of attaching includes:
preparing a precisely sized model of said dental replacement of said pin and of a meltable molding material;
applying a strand of said meltable molding material to said model;
placing said model and said strand into a curable potting compound;
heating said meltable molding material for removing said meltable molding material form said potting compound such that a mold for said ceramic body is formed, wherein the removed strand leaves behind a casting channel in said potting compound;
introducing said ceramic material into said mold through said casting channel;
arranging a piston at said casting channel and pressurizing said ceramic material by said piston for pressing said ceramic material under thermal plasticization into said mold.
preparing a precisely sized model of said dental replacement of said pin and of a meltable molding material;
applying a strand of said meltable molding material to said model;
placing said model and said strand into a curable potting compound;
heating said meltable molding material for removing said meltable molding material form said potting compound such that a mold for said ceramic body is formed, wherein the removed strand leaves behind a casting channel in said potting compound;
introducing said ceramic material into said mold through said casting channel;
arranging a piston at said casting channel and pressurizing said ceramic material by said piston for pressing said ceramic material under thermal plasticization into said mold.
13. A method according to claim 12, wherein said step of pressing is performed at a temperature of 1000°C or less.
14. A method according to claim 1, wherein said pin is a prefabricated, partially stabilized ZrO2 pin.
15. A method according to claim 1, wherein said pin has a flexural strength of at least 600 MPa.
16. A method according to claim 15, wherein said pin has a flexural strength of 800-1500 MPa.
17. A method according to claim 1, wherein said ceramic dental replacement has a flexural strength of at least 100 MPa.
18. A ceramic dental replacement comprised of a ZrO2 ceramic glass body and a ZrO2 pin, wherein a thermal expansion coefficient of said pin, measured at 20°C to 500°C, is identical to or up to 3.0 µm/mK greater than a thermal expansion coefficient of said ceramic glass body, measured at 20°C to 500°C,
19. A method of using a ceramic dental replacement comprised of ZrO2 ceramic glass body and a ZrO2 pin, wherein a thermal expansion coefficient of said pin, measured at 20°C to 500°C, is identical to or up to 3.0 µm/mK greater than a thermal expansion coefficient of said ceramic glass body, measured at
20°C to 500°C, for reconstructing missing tooth substance of vital and non-vital teeth.
20. A method according to claim 19 for reconstructing a root, a crown, a neck, or a crown and a neck of a tooth.
20. A method according to claim 19 for reconstructing a root, a crown, a neck, or a crown and a neck of a tooth.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP19630412.1 | 1996-07-26 | ||
| DE19630412A DE19630412C2 (en) | 1996-07-26 | 1996-07-26 | Process for producing an all-ceramic dental structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2211520A1 true CA2211520A1 (en) | 1998-01-26 |
Family
ID=7801068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002211520A Abandoned CA2211520A1 (en) | 1996-07-26 | 1997-07-25 | Method for manufacturing a ceramic dental replacement |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0820754B1 (en) |
| JP (2) | JP3218207B2 (en) |
| AT (1) | ATE354341T1 (en) |
| CA (1) | CA2211520A1 (en) |
| DE (2) | DE19630412C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006084346A1 (en) * | 2005-02-11 | 2006-08-17 | Medin Tech | Implant system and method of installation thereof, and kit comprising the same |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1396237A1 (en) * | 2002-09-05 | 2004-03-10 | Elephant Dental B.V. | Strengthened ceramic restoration |
| ES2316691T3 (en) | 2003-12-17 | 2009-04-16 | Degudent Gmbh | PROCEDURE FOR THE MANUFACTURE OF A CERAMIC DENTAL STRUCTURE. |
| DE102006033794B3 (en) * | 2006-07-19 | 2008-03-06 | BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG | Set of elements for the production of a dental prosthesis, system for the production of a dental prosthesis or a set of elements and corresponding manufacturing methods |
| DE102014103234A1 (en) * | 2014-03-11 | 2015-09-17 | Anton Sawizki | Method for making a secondary part |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58118746A (en) * | 1982-01-07 | 1983-07-14 | 株式会社ニコン | Dental implant and production thereof |
| JPS6425849A (en) * | 1987-07-21 | 1989-01-27 | Olympus Optical Co | Abutment tooth constructing material |
| JPH0323856A (en) * | 1989-06-21 | 1991-01-31 | Asahi Optical Co Ltd | Artificial root of tooth |
| DE4210781C2 (en) * | 1992-04-01 | 1995-04-13 | Rauter Vita Zahnfabrik | Standard-made artificial tooth blanks |
| AU683050B2 (en) * | 1993-06-24 | 1997-10-30 | Dentsply Gmbh | Dental prosthesis |
| DE4404921C2 (en) * | 1994-02-16 | 1996-08-14 | Fraunhofer Ges Forschung | Use of a mica glass ceramic containing ZrO¶2¶ for tooth crowns |
| DE4423794C1 (en) * | 1994-07-01 | 1996-02-08 | Ivoclar Ag | Glass ceramic containing Zr0¶2¶, process for its production and its use |
| DE4428839C2 (en) * | 1994-08-01 | 1997-01-23 | Ivoclar Ag | Alkali-zinc-silicate glass-ceramics and glasses and process for producing the glass-ceramics |
-
1996
- 1996-07-26 DE DE19630412A patent/DE19630412C2/en not_active Expired - Fee Related
-
1997
- 1997-07-02 EP EP97110883A patent/EP0820754B1/en not_active Expired - Lifetime
- 1997-07-02 DE DE59712818T patent/DE59712818D1/en not_active Expired - Lifetime
- 1997-07-02 AT AT97110883T patent/ATE354341T1/en not_active IP Right Cessation
- 1997-07-25 JP JP20059097A patent/JP3218207B2/en not_active Expired - Fee Related
- 1997-07-25 CA CA002211520A patent/CA2211520A1/en not_active Abandoned
-
2001
- 2001-03-19 JP JP2001079080A patent/JP2001286489A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006084346A1 (en) * | 2005-02-11 | 2006-08-17 | Medin Tech | Implant system and method of installation thereof, and kit comprising the same |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59712818D1 (en) | 2007-04-05 |
| EP0820754A3 (en) | 2000-10-25 |
| ATE354341T1 (en) | 2007-03-15 |
| JPH1085240A (en) | 1998-04-07 |
| JP3218207B2 (en) | 2001-10-15 |
| JP2001286489A (en) | 2001-10-16 |
| EP0820754B1 (en) | 2007-02-21 |
| DE19630412A1 (en) | 1998-01-29 |
| DE19630412C2 (en) | 2001-10-04 |
| EP0820754A2 (en) | 1998-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5833464A (en) | Method for manufacturing a ceramic dental replacement | |
| Koutayas et al. | All-ceramic posts and cores: the state of the art. | |
| JP3849076B2 (en) | Method for molding dental restoration and apparatus therefor | |
| US6485849B2 (en) | Method for molding dental restorations and related apparatus | |
| US6818573B2 (en) | Method for molding dental restorations and related apparatus | |
| US6606884B2 (en) | Sinterable lithium disilicate glass ceramic | |
| US4585417A (en) | Dental appliance and method of manufacture | |
| US6375729B1 (en) | Machinable glass-ceramics | |
| JPH0352979B2 (en) | ||
| JPH0723986A (en) | Denture | |
| JPH0767891A (en) | Production of dentistry prosthetic appliance with ceramic base, and molding to use said prosthetic appliance | |
| Höland et al. | Bioceramics and their application for dental restoration | |
| JP4409760B2 (en) | Manufacturing method for ceramic bridge dentures | |
| Raghavan | Ceramics in dentistry | |
| WO2005007009A1 (en) | Process for producing dental prosthesis and kit for use therein | |
| US20050115460A1 (en) | Method for molding dental restorations and related apparatus | |
| CA2211520A1 (en) | Method for manufacturing a ceramic dental replacement | |
| Stumpel III et al. | Adhesive abutment cylinder luting | |
| EP0806932B1 (en) | Tooth restoration and prosthesis component made from ceramic material and a method of manufacturing the same. | |
| KR101645357B1 (en) | Lithium Disilicate implant | |
| US6465106B1 (en) | Method for molding dental restorations and related apparatus | |
| JPS62108750A (en) | Mica-iolite base glass ceramic material | |
| Pavlović et al. | Contemporary dental ceramics | |
| Blatz et al. | Selected Properties of a Synthetic Quartz Glass-Ceramic. | |
| JPH04126141A (en) | Artificial crown |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |