Fig. 4From: Analysis of the surface roughness and microhardness of dental restorative materials exposed to heat sources and cold temperatures for human identification purposesGraphic representation of the comparison of ΔKHN between the materials when exposed to the heat action (one-way ANOVA, Tukey test, p < .05). The horizontal lines over the bars indicate no statistically significant difference (p > .05). Different letters indicate significant difference (p < .05) between the materials at the same temperatureBack to article page