| 摘要 |
A method of making a titanium double crown, whereby an internal double titanium crown is made by modelling from wax, casting from titanium and milling, and further, the coping of the external double crown is modelled on it; further, an anatomical tooth flask is modelled from wax on the coping, which, following the modelling of casting canals, is poured over with a refractory protecting material, burnt in a furnace and used to cast the external double crown from titanium, whereby the external coping of the double crown is made in such a way that the external surface of the internal double crown (1) is covered with 0.1-milimetre celluloid film (3) on a carrier made from 0.6-milimetre celluloid film (4), leaving the friction belt (5), whose width (b) is directly proportional to the width (a) of the internal double crown (1), and further the whole external surface of the celluloid film (4) and the area of the friction belt (5) is covered with the chemically polymerizing modelling material (7); prior to being poured over with refractory protecting material, the film (3) is removed from the inside of the coping.
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