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.
Forest plot of the criterion color of the NCCL restorations performed with glass ionomer cement and composite resin, subgrouped by the follow-up time at 12, 24 and 36 months. The blue squares indicate the mean of each study, and the error bars are the respective 95% confidence intervals. Black diamonds indicate the results of the subgrouped studies for a period of time, and the last diamond indicates the unified results of the three subgroups evaluated.
