发明授权
- 专利标题: Artificial tooth veneer restorations
- 专利标题(中): Zahnrestaurierungen mit einemkünstlichenBelag
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申请号: EP91850218.8申请日: 1991-09-09
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公开(公告)号: EP0477157B1公开(公告)日: 1996-01-03
- 发明人: Odén, Agneta , Andersson, Matts
- 申请人: SANDVIK AKTIEBOLAG , Nobelpharma AB
- 申请人地址: S-811 81 Sandviken 1 SE
- 专利权人: SANDVIK AKTIEBOLAG,Nobelpharma AB
- 当前专利权人: SANDVIK AKTIEBOLAG,Nobelpharma AB
- 当前专利权人地址: S-811 81 Sandviken 1 SE
- 代理机构: Östlund, Alf Olof Anders
- 优先权: SE9002959 19900917
- 主分类号: A61C13/00
- IPC分类号: A61C13/00 ; A61C5/10
摘要:
The present invention relates to a method of manufacturing artificial tooth veneer restorations for natural teeth composed of a ceramic core (B) by pressing and sintering ceramic powder. The core (B) is preferably manufactured from a high strength densely sintered ceramic material by copy milling from an impression of the prepared tooth surface (P) to a compacted body, a presintered body or a sintered body. Alternatively the core (B) is manufactured by compacting the ceramic powder against a body, which surface is copy milled from a modell of the prepared tooth surface (P). During the copy milling the sintering shrinkage is considered by enlargement of the copy milled compacted body, the presintered body or the sintered body corresponding to the sintering shrinkage. The tooth veneer restorations are given their final shape by shaping the external surface (Y) of the compacted, presintered or sintered ceramic body. After the final sintering the external surface (Y) can be shaped before a veneer material is attached to the external surface of the core (B) by firing of dental porcelain (A). Manufacturing ceramic teeth veneer restorations according to the method of this invention increases their strength and accuracy to shape.
公开/授权文献
- EP0477157A1 Artificial tooth veneer restorations 公开/授权日:1992-03-25
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