[Research in the dental laboratories in Thessaloniki referring to the categories and the elaboration of the dental alloys for the fixed prosthetic constructions]. / Hereuna sta odontotechnika ergasteria Thessalonikes schetika me tis kategories kai ten ergasteriake epexergasia ton odontiatrikon kramaton gia akinetes prosthetikes ergasies.

The research that is presented in this article is a statistical evaluation with goal to scrutinize which classes of the dental alloys are being used by the dental laboratories in Thessaloniki for porcelain and acrylic bridge work constructions. On the other hand many elements concerning to the elaboration of the new dental alloy have been checked and evaluated. The result of this research that covers the 90% of the total number of the dental laboratories of Thessaloniki lead to the following conclusions: 1. The dental laboratories in Thessaloniki use in high percentage alloys with low cost for the fixed prosthetic constructions. 2. The Ag-Pd dental alloys for the metal-acrylic and the Ni-Cr alloys for the metal-ceramic constructions occupy the first position in frequency. 3. The dental Technicians must improve even more the elaboration of the new dental alloys.