| 摘要 |
On a work model (1), which consists of a holder (2), in which master dies (8) with impressions of ground teeth (3, 4, 5) or implants (7) are placed, between/on which a ceramic bridge is to be modelled, and where the teeth (3, 4, 5) - implants (7), are mounted in a correct reciprocal distance, a plate piece (6 and/or 6'), which has been cut from an alumina oxide block is adapted to the spaces in between the teeth. A coat of spacer material (9), wax, is applied to the teeth, thereafter a coat of separating material (10) and thereafter a layer of pliable substructure material (11) from alumina oxide, whereafter the plate piece (6) is positioned between two teeth and vibrated into final position, whereafter the transition areas between the plate piece and the adjacent teeth is covered and smoothed with substructure material (11), and the work model is pre-dried at approximately 50 DEG C for approximately 15 minutes. Thereafter the work model is exposed to radiated heat, whereby the spacer material (9) is melted and the bridge element can be removed from the work model. Thereafter the bridge element (12) is dry sintered, and after finished cooling a layer of glass is applied to the surface, and thereafter an infiltration sintering takes place. The method is fast and therefore inexpensive to use. Furthermore bridges on bridge pillars of metal, so-called implants, can be modelled up.
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