Table 4.

Comparison of polishing steps to glazed zirconia

	Dialite ZR (5000 RPM)	Dialite ZR (15,000 RPM)	Dialite ZR (40,000 RPM)	Cera-Master (5000 RPM)	Cera-Master (15,000 RPM)	Cera-Master (40,000 RPM)
Gloss
Bur roughen (15 s)	−	−	−	−	−	−
Medium polish (30 s)	−	−	−	−	−	−
Medium polish (60 s)	−			−	−	−
Fine polish (30 s)		+	+		+
Roughness
Bur roughen (15 s)	+	+	+	+	+	+
Medium polish (30 s)	+	+	+	+	+	+
Medium polish (60 s)	+	+		+	+	+
Fine polish (30 s)	+	−		+		+

− indicates significantly less than control, + indicates significantly greater than control