Fogorvosi szemle, 2019 (112. évfolyam, 1-4. szám)

2019-12-01 / 4. szám

FOGORVOSI SZEMLE

112. évf. 4. sz. 2019.n

116

cs HegeDűs, g balogH, J gáll, a csík

Comparative study of important parameters of different ZrO2

(Y

2

O

3

) ceramics

Zirconia-based ceramics have been widely applied in the field of prosthodontics. Yttria stabilized tetragonal zirconia polycristal (Y-TZP) can further enhance the bending strength and fracture toughness of prosthesis remarkably by neutralizing the external strain through phase transformation. In this study seven frequently used Y-TZM ceramics were evaluated. Significant differences were found both in the three point bending test and in the fracture toughness results. Also, coherence was found between the monocline-tetracline phase transformation and fracture toughness results of the different ceramics. These parameters are important factors in the final quality of the Y-TZP prosthesis.

Keywords: Y-TZP, polycristal ceramic, fracture toughness, phase transformation

Original article