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Table 5 Mean retentive forces (Mean) and standard deviations (SD) of the two different time groups (Months) expressed in Newtons. The values are based on pooling the material groups and storage media results for the two time groups.

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

Months Mean ± SD N Duncan Grouping
0.5 1486.3 ± 547.7 18 B
12 2026.8 ± 891.8 18 A
  1. N = number of samples