PROCESS FOR THE PRODUCTION OF A HEAD PIECE OF A TOOTH IMPLANT AND MANUFACTURING KIT FOR SUCH A PROCESS
First Claim
1. A process for manufacturing a head piece (1) of a tooth implant from an individually produced positive model (27), the tooth implant comprising a head piece (1) and a base (3) which must be first firmly attached to the jawbone, the head piece (1) being attached to the base (3) by insertion of a lug (5) projecting either from the head piece or from the base and matching a closely fitting socket (21) on the other part, the lug and socket being shaped with a form-closure contour (7) as an anti-twist feature, wherein the head pieces can be made singly, and wherein the outer surface of a positive three-dimensional model (27) of the implant is scanned and a ceramic blank (29, 60) is then copy-milled (V) in accordance with the scan data to make the head piece (1), taking into account shrinkage resulting from sintering,characterized by the fact that before the copy-milling (V) of the ceramic blank (29, 60), a preparatory step (I) in the production process is performed, in which the blank (29, 60) is in a raw form, and the insertion connector (62) with the form closure (7) is shaped by attaching a scanning insert on the positive model (27) at a point matching the position of the insertion connector on the blank, which enlarges the positive model by at least as much space (a) as that to be occupied by the insertion connector after sintering of the ceramic blank (29, 60).
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Accused Products
Abstract
A process for manufacturing a head piece (1) of a tooth implant from an individually produced positive model (27). The head piece (1) is fitted with a plug-in type connection shaped with form-closure (7) as an anti-twist feature and can be inserted into the base (3) which in turn can be embedded in the jawbone. On either head piece or base there is a lug (5) which fits snugly into a socket on the other part. The process calls for copy-milling (V) in which the outer surface of the positive model (27) is three-dimensionally scanned. The data from the scan are used to guide a milling machine which creates the head piece (1) from a ceramic blank (29). In accordance with the invention, before the copy-milling (V) of the blank (29), a preparatory step (I) in the production process is conducted. When the blank is yet in its raw form, the insertion connector with the form-closure (7) connection is shaped ahead of by attaching a scanning insert on the positive model (27) at a point matching the position of the insertion connector on the blank, which enlarges the positive model by at least as much space (a) as that to be occupied by the insertion connector.
20 Citations
17 Claims
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1. A process for manufacturing a head piece (1) of a tooth implant from an individually produced positive model (27), the tooth implant comprising a head piece (1) and a base (3) which must be first firmly attached to the jawbone, the head piece (1) being attached to the base (3) by insertion of a lug (5) projecting either from the head piece or from the base and matching a closely fitting socket (21) on the other part, the lug and socket being shaped with a form-closure contour (7) as an anti-twist feature, wherein the head pieces can be made singly, and wherein the outer surface of a positive three-dimensional model (27) of the implant is scanned and a ceramic blank (29, 60) is then copy-milled (V) in accordance with the scan data to make the head piece (1), taking into account shrinkage resulting from sintering,
characterized by the fact that before the copy-milling (V) of the ceramic blank (29, 60), a preparatory step (I) in the production process is performed, in which the blank (29, 60) is in a raw form, and the insertion connector (62) with the form closure (7) is shaped by attaching a scanning insert on the positive model (27) at a point matching the position of the insertion connector on the blank, which enlarges the positive model by at least as much space (a) as that to be occupied by the insertion connector after sintering of the ceramic blank (29, 60).
- 8. Manufacturing kit for producing a head piece (1) of a tooth implant from an individually made positive model (27) by means of a copy-milling machine, wherein the head piece (1) is capable of being plugged into a base part (3) that can be embedded in the jawbone, by means of an insertion connector (62) endowed with form closure (7) as an anti-twist feature, the manufacturing kit comprising a pre-milled ceramic blank (29, 60) from which the head piece (1) can be manufactured using the copy-milling machine on the basis of the positive model (27), the insertion connector of the ceramic blank (29) being fashioned in a previous processing step (I) independently of the copy-milling machine step (V).
Specification