Degussa Aktiengesellschaft

Udo Englisch

Dieter Kaufmann

Jurgen Hausselt

As replacements for noble metal containing alloys fused to porcelain in dental prosthetics there are needed alloys based on cobalt-chromium-tungsten which have a hardness of less than 300 (HV 5), can be veneered faced with known dental ceramics without problems and can be worked without problem with the customary working techniques. Such alloys contain in addition to 42-69.5 weight % cobalt, 10-35 weight % chromium, and 5-25 weight % tungsten, 2-10 weight % iron, 1-4 weight % aluminum, 0-5 weight % rhenium, and 0-2 weight % titanium, whereby the sum of the content oc chromium, tungsten, and rhenium is between 27.5 and 45 weight % and the sum of aluminum and titanium is below 5 weight %.

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Rodenbach, Germany

Udo Englisch