公开(公告)号：US5718749A

公开(公告)日：1998-02-17

申请号：US748789

申请日：1996-11-14

申请人： Haruhiko Horiuchi ,  Kenichi Iiyama ,  Koichi Mamada

发明人： Haruhiko Horiuchi ,  Kenichi Iiyama ,  Koichi Mamada

IPC分类号： A61C13/20 ,  A61K6/027 ,  B22C1/08 ,  B22C9/02 ,  B22C9/04 ,  C04B28/14 ,  C04B11/00

CPC分类号： A61K6/0625 ,  C04B28/14 ,  C04B2111/00836

摘要： A dental gypsum bonded investment composition comprising 100 parts by weight of a mixture comprising (a) .alpha.-hemihydrate gypsum as a binder and (b) quartz and/or cristobalite as a refractory material, and optionally, (c) one or more aggregates selected from the group consisting of metallic oxides, metallic carbides, and metallic nitrides, which can substitute a part of the refractory material, having from 0.01 to 1.0 part by weight of a poly-tetrafluoroethylene resin and optionally, from 0.001 to 0.05 part by weight of one or more anionic surfactants selected from the group consisting of alkylbenzenesulfonates and alkylsulfates mixed therewith, is disclosed. The dental gypsum bonded investment composition of the invention keeps the fine particles to have a stable performance without being removed by the pneumatic transportation at the time of production, has superior heat resistance, and can be used for casting of alloys having a high melting point such as casting alloys for metalceramic restorations.

摘要翻译： 一种牙石膏粘合投资组合物，其包含100重量份的混合物，所述混合物包含（a）作为粘合剂的α-二水合石膏和（b）石英和/或方英石作为耐火材料，以及任选地，（c）选择一种或多种聚集体 由可以替代一部分耐火材料的金属氧化物，金属碳化物和金属氮化物组成的组合物，其具有0.01至1.0重量份的聚四氟乙烯树脂和任选0.001至0.05重量份的聚四氟乙烯树脂 公开了一种或多种选自烷基苯磺酸盐和与其混合的烷基硫酸盐的阴离子表面活性剂。 本发明的牙膏结合投资组合物使生产中的气动输送不会被除去而具有稳定的性能，具有优异的耐热性，可用于铸造熔点高的合金 作为金属陶瓷修复体的铸造合金。

公开(公告)号：US06835066B2

公开(公告)日：2004-12-28

申请号：US10050956

申请日：2002-01-22

申请人： Kenichi Iiyama ,  Tatsuru Doumoto ,  Yuki Sakamoto

发明人： Kenichi Iiyama ,  Tatsuru Doumoto ,  Yuki Sakamoto

IPC分类号： A61C510

CPC分类号： A61C13/0004 ,  A61C5/77

摘要： A measuring center stores three-dimensional coordinate information of an intra-oral shape measured by impression taking as a digital signal. The measuring center sends the obtained measured data to a design center using communication apparatus. The design center reproduces the intra-oral shape on a graphic display device based on the received measuring data as a three-dimensional graphic, designs a shape of a dental prosthesis and stores it as a digital signal. The processing center transmits the received design data to a milling processor as a processing command and subjects a block material to milling processing to prepare a dental prosthesis.

摘要翻译： 测量中心存储通过压印测量的口内形状的三维坐标信息作为数字信号。 测量中心使用通信设备将获得的测量数据发送到设计中心。 设计中心基于所接收的测量数据作为三维图形在图形显示装置上再现口内形状，设计牙修复体的形状并将其存储为数字信号。 处理中心将接收的设计数据作为处理命令传送到铣削处理器，并对块材进行铣削处理以制备牙科假体。

公开(公告)号：US5168917A

公开(公告)日：1992-12-08

申请号：US697578

申请日：1991-05-09

申请人： Reiichi Okuda ,  Norio Kojima ,  Kenichi Iiyama ,  Yoshinobu Yamamura ,  Yasutaro Ito ,  Shohei Hayashi

发明人： Reiichi Okuda ,  Norio Kojima ,  Kenichi Iiyama ,  Yoshinobu Yamamura ,  Yasutaro Ito ,  Shohei Hayashi

IPC分类号： A61C13/20 ,  B22D18/04 ,  B22D18/06 ,  B22D21/00 ,  B22D21/02 ,  B22D23/00

CPC分类号： B22D18/04 ,  B22D18/06 ,  B22D21/005 ,  A61C13/20

摘要： A method for casting dental metals with a casting apparatus including a melting chamber in which there are located an arc electrode above and a crucible formed of an electrically conductive material positioned below the arc electrode, and a mold chamber divided from the melting chamber by a partition wall having a through-hole at a position below the crucible and housing a mold box receiving a mold provided with an extending open vent positioned below the through-hole, the melting chamber communicating hermetically with the mold chamber through the mold, which is characterized by positioning a dental metal ingot on the crucible, vacuumizing the melting and mold chambers, feeding a small amount of an inert gas into the melting chamber at such a pressure as to induce arc discharge all over the upper surface of the ingot, thereby melting the ingot placed on the crucible by arc discharge from the arc electrode, pouring the thus obtained molten metal into the mold through its inlet, and immediately feeding an additional amount of the inert gas into the melting chamber to increase its internal pressure to a level suitable for casting.

摘要翻译： 一种用铸造设备浇铸牙科金属的方法，所述铸造设备包括熔化室，其中位于弧形电极上方的坩埚和由位于电弧电极下方的导电材料形成的坩埚，以及由熔化室分隔开的隔室 壁在坩埚下方的位置具有通孔，并且容纳模具箱，所述模具箱容纳设置有位于所述通孔下方的延伸开口的模具，所述熔化室通过所述模具与所述模具室气密连通，其特征在于 将坩埚上的牙金属锭定位在坩埚上，对熔化模具室进行抽真空，将少量惰性气体以熔化室的上表面引起电弧放电的压力供给到熔化室中，从而熔化锭 通过从电弧电极的电弧放电放置在坩埚上，通过其入口将如此获得的熔融金属倒入模具中， 将额外量的惰性气体轻轻地加入到熔化室中以将其内部压力提高到适合铸造的水平。

公开(公告)号：US06619959B2

公开(公告)日：2003-09-16

申请号：US10051080

申请日：2002-01-22

申请人： Kenichi Iiyama ,  Yuki Sakamoto ,  Tatsuru Doumoto

发明人： Kenichi Iiyama ,  Yuki Sakamoto ,  Tatsuru Doumoto

IPC分类号： A61C500

CPC分类号： A61C13/0004

摘要： To prepare a dental prosthesis that has a shape exactly the same as in the form at the time of sound state, with superior intra-oral fitness precision, a process for preparing a dental prosthesis utilizing a CAD/CAM system includes subjecting three-dimensional coordinate information of an intra-oral shape measured by impression taking or by photographing within an oral cavity of a patient, to three-dimensional graphic display on a graphic display device and designing a dental prosthesis on the three-dimensional graphic, wherein three-dimensional coordinate information of a previously preserved intra-oral shape of a patient at the time of sound state is subjected to graphic display simultaneously on the graphic display device; the dental prosthesis of an objective tooth is designed so as to have a shape same as the shape at the time of sound state; the obtained design data of the dental prosthesis is transmitted to a milling processor as a processing command; and a block material is subjected to milling processing to prepare a dental prosthesis.

摘要翻译： 为了准备具有与声音状态完全相同的形状的牙科修复体，具有优异的口内健身精度，使用CAD / CAM系统制备牙科假体的方法包括进行三维坐标 通过在患者的口腔内的印象取样或拍摄测量的口内形状的信息，在图形显示装置上的三维图形显示和在三维图形上设计牙修复体，其中三维坐标 在图形显示装置上同时对在声音状态下的患者的以前保存的口腔内形状的信息进行图形显示; 客观牙齿的假牙设计成具有与声状时的形状相同的形状; 所获得的牙科假体的设计数据作为处理命令被传送到铣削处理器; 对块材进行研磨处理以制备牙科假体。

公开(公告)号：US5168918A

公开(公告)日：1992-12-08

申请号：US697619

申请日：1991-05-09

申请人： Reiichi Okuda ,  Norio Kojima ,  Kenichi Iiyama ,  Yoshinobu Yamamura ,  Yasutaro Ito ,  Shohei Hayashi

发明人： Reiichi Okuda ,  Norio Kojima ,  Kenichi Iiyama ,  Yoshinobu Yamamura ,  Yasutaro Ito ,  Shohei Hayashi

IPC分类号： A61C13/20 ,  B22D18/04 ,  B22D18/06 ,  B22D21/00 ,  B22D21/02 ,  B22D23/00

CPC分类号： B22D21/005 ,  B22D18/04 ,  B22D18/06 ,  A61C13/20

摘要： A method for casting dental metals with a casting apparatus including a hermetically sealed casting chamber in which an arc electrode is located above, a crucible made of an electrically conductive material is positioned below the arc electrode, and a mold provided with a closed vent is disposed below the crucible, the method including by positioning a dental metal ingot on the crucible, evacuating the casting chamber to vacuum, feeding a small amount of an inert gas at such a pressure as to induce arc discharge all over the upper surface of the ingot, thereby melting the ingot placed on the crucible by arc discharge from the arc electrode, pouring the thus obtained molten metal into a mold through its inlet, and immediately feeding an additional amount of the inert gas into the casting chamber to increase its internal pressure to a level suitable for casting. Also the additional amount of the inert gas is rapidly fed into the casting chamber through a gas tank in the vicinity of the casting chamber.

摘要翻译： 一种用铸造设备铸造牙科金属的方法，该浇铸装置包括一个气密电铸室，其中弧形电极位于上方，由导电材料制成的坩埚位于弧形电极的下面，并且设置有一个封闭的通气口的模具 该方法包括通过将坩埚上的牙金属锭定位在坩埚上，将铸造室抽真空，在铸锭上表面引起电弧放电的压力下供给少量的惰性气体， 从而通过从电弧电极的电弧放电熔化置于坩埚上的铸块，将由此获得的熔融金属通过其入口注入模具中，并立即将额外的惰性气体进料到铸造室中以将其内部压力增加到 水平适合铸造。 此外，惰性气体的附加量通过在铸造室附近的气罐快速进料到铸造室中。