Abstract:
The present invention relates to a process for the preparation of a sterilized ceramic body comprising or essentially consisting of stabilized zirconia of a defined colour. The process comprising the subsequent steps of a) providing a ceramic primary body comprising or essentially consisting of stabilized zirconia of a first colour A, and b) sterilizing the primary body using radiation sterilization whereby the primary body undergoes a colour change to a colour B. According to the invention, the process comprises the further step of c) irradiating the sterilized primary body with electromagnetic radiation of at least one wavelength lying in the wavelength band ranging from 150 nm to 700 nm to induce an at least partial reversal of the colour change of step b) to obtain a colour C of the sterilized ceramic body, said colour C complying with the following requirements in the CIELAB colour space : L* being from 54 to 95, a* being from -15 to 15 and b* being from -15 to 15.
Abstract:
The present invention relates to a dental implant made of a ceramic material comprising an implant surface having at least partially a contact angle of less than 20°, said implant surface being at least partially covered by a protective layer. Said protective layer comprises a dextran having a molecular weight of more than 15' 000 Da.