Research Information System
JOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY, vol.32, no.6, pp.607-614, 2020 (SCI-Expanded)
Objective The objective of the present research was to evaluate the effect of sintering temperatures (1350 degrees C, 1450 degrees C, and 1600 degrees C) of a novel multi-layered esthetic zirconia material (Katana 12Z/STML) on the grain sizes and on the translucency parameters (TP00) for 2 different shades (A2-A3) and 2 different thicknesses (1-1.5 mm). Material and Methods A total of 120 non-sintered specimens were randomly divided into three subgroups according to sintering temperatures. The TP00 and grain sizes of the sintered specimens were calculated. Statistical analyses were performed using 3-way ANOVA, 1-way ANOVA, and Tukey's post hoc tests. Results TP00 increased 1.2 to 1.5 times as the specimen thickness decreased from 1.5 to 1 mm (P <= .05). The lowest TP00 values were recorded for sintering at 1350 degrees C for the investigated thicknesses and shades (P <= .05). The interaction of sintering temperature and shade was significant (P <= .05). Grain sizes were ordered according to sintering temperature as 1350 degrees C < 1450 degrees C < 1600 degrees C (P <= .05). Conclusions TP00 values decreased with the increase in the thickness of the monolithic zirconia. The sintering temperatures and their interaction with shade significantly affected TP00 values. The grain size increased with increasing sintering temperature. Clinical significance The translucency of a novel multi-layered monolithic zirconia increased with higher sintering temperatures and lower thickness. The grain size increased with the increase in the sintering temperature. The sintering temperature of 1600 degrees C led to a significant change in translucency for shade A3.