Influence of Surface Treatment on Strength Distribution of Vita VMK 68 Dental Porcelains

Table 1

Arithmetic mean roughness values and their standard deviations of specimens of four groups [6].

Surface treatment	Arithmetic mean roughness 𝑅𝑎 (µm)
100-grit polished	1.68±0.30
600-grit polished	0.9±0.34
1000-grit polished	0.38±0.16
Glazed	0.23±0.06