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Table 1 Ra mean values (Mean) and standard deviations (SD) for the different coping materials expressed in microns.

From: Use of zinc phosphate cement as a luting agent for Denzir™ copings: an in vitro study

Material Treatment Mean ± SD
Denzir Sandblasted 2.01 ± 0.65
Denzir Untreated 2.13 ± 0.52
Procera Untreated 2.47 ± 0.76