Characterisation and Modification of the Optical Properties of Zirconia-Based Ceramics for Aesthetic Dental Restorations

The use of 3Y-TZP for monolithic dental restorations is well established in the dentistry field. However, the challenges of colour matching generally necessitates the application of layering, although this introduces a second layer of uncertainty. The present work aimed to examine the relevant factors of sintering temperature (1h, 2 h, 4h at 1400°C, 1500°C, 1600°C) and post-sintering annealing conditions (1 min at 750°C) commensurate with the processes of layering, which are done in two atmospheric conditions (vacuum, air).