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Nove slitine na bazi kobalta i njihova primjena za kombinirane fiksne i pomične djelomične proteze

Authors :
E. Lenz
Source :
Acta stomatologica Croatica : International journal of oral sciences and dental medicine, Volume 20, Issue suppl
Publication Year :
1986
Publisher :
School of Dental Medicine, University of Zagreb, Croatian Dental Society - Croatian Medical Association, 1986.

Abstract

Nove legure na bazii ikobalta karakterizira velika otpornost prema koroziji, finozmata struktura, dobra livljivost ü povoljna mehanička svojstva. Budući da se pri obradi na visokim temperaturama stvara površinski oksidacijsiki sloj, to se preporučuju kao materijal za (individualnu izradu vezanih elemenata nadlijevanjem. Eksperimentalno je dokazano da se može spriječiti zavarivanje taljenjem, ako se elemenat krunica-vezni pripoj žare na temperaturi od 950°C preko 15 min ii nadliijevaju u lijevne oblike zagrijane na maksimalno 750°C. Tehnologijom nad lijevanja postiže se najveća preciznost i velika otpornost na trošenje vezanih elemenata iz legura na bazi kobalta.<br />The new cobalt-based alloys are characterized by high resistance to corrosion, fine granulation, and good molding and mechanical features. As a surface oxidation layer is formed during the treatment at high temperature, they appear to be the materiail of choice for individual manufacture of the over-cast attachment elements. It has been experimentally demonstrated that welding by melting can be avoided if the crown-attachment element is burnt at temperature of 950°C for more than 15 minutes and then cast into moulds heated to maximal temeprature of 750°C. The technology of casting-over provides the highest precision and resistance to wearing of the attachment elements made of cobalt-based alloys.

Details

Language :
Croatian
ISSN :
18460410 and 00017019
Volume :
20
Database :
OpenAIRE
Journal :
Acta stomatologica Croatica : International journal of oral sciences and dental medicine
Accession number :
edsair.od.......951..ee5b6ef8fe164240f44b3e5602b5ef90