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公开(公告)号：EP0455727B1
公开(公告)日：1995-03-08
申请号：EP90903120.5
申请日：1990-01-04
发明人： MILLER, Alan, N.
IPC分类号： A61C13/30
摘要： An anchoring pin (10) for retention of a dental restoration onto a tooth stub, the pin (10) including an upper retention portion (14) on which a restoration is to be formed, a lower anchoring threaded portion (18) self-threadable in a bore pre-drilled in the tooth stub and a stop collar (16) interconnected between the retention portion (14) and the anchoring portion (18). A stepped dental drill (50) having two coaxial drill bits (70, 72) of different diameters is provided, which in addition to forming the bore (82) makes a counterbore (86) at the mount of the bore at the exposed excavated surface of the tooth. The counterbore (86) receives the stop collar (16) of the anchoring pin (10) as the latter is driven into the tooth bore (82) thereby preventing bottoming out of the pin (10) so as to avoid concentrated stress at the tip (29) of the pin (10) and also providing distribution of stress as the wider collar (16) abuts the bottom of the counterbore (86).
摘要翻译： 一种用于将牙修复物保持在牙根上的固定销，所述销包括将在其上形成修复体的上保持部分，可在所述牙根中预先钻孔的孔中可自行螺纹的下锚定螺纹部分， 止动环在保持部和锚固部之间相互连接。 提供了具有不同直径的两个同轴钻头的阶梯式牙钻，除了形成孔之外，在孔的暴露的挖掘表面处，在孔的安装座处形成沉孔。 沉头孔接收固定销的止动环，因为后者被驱动到齿孔中，从而防止从底部引出销，从而避免在销的尖端处的集中应力，并且当更宽的套环邻接时，也提供应力分布 底部的沉孔。
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公开(公告)号：EP0387334B1
公开(公告)日：1994-06-08
申请号：EP89910342.8
申请日：1989-07-26
发明人： MILLER, Alan, N.
IPC分类号： A61C5/08
CPC分类号： A61C13/0003 , A61C13/30
摘要： A dental post (10) for retaining a dental restoration into a tooth stub and a method for making dental post. The dental post (10) includes a cylindrical body portion (12) and a head portion (14) which extends outwardly from the body portion (12). The body portion (12) is inserted in a bore in the tooth and secured therein by cement. To improve cement retaining capacity of the dental post (10), there are provided on the body portion (12) non-continuous raised portions (42), spaced by wide open gaps to regain large segments of thick segments of cement. The overall portion of the gap area surface is greater than that of the land area surface.
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