Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Results of the flexural strength (a), depth of cure (b), water sorption (c), and solubility (d) of each group. Each value represents the mean of 6 measurements, and the error bars represent the standard deviation of the mean (average ± standard deviation; n = 6). For each of the mechanical and physical properties, the same lowercase letter indicates no differences among the experimental groups (p > 0.05).
