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 and funnel plot; comparison of rotary and reciprocating system on postoperative pain: (a) Overall; (b-d) according to the nature of postoperative pain - mild, moderate, and severe - after 12 h; (e-g) according to the nature of postoperative pain - mild, moderate, and severe - after 24 h; (h-j) according to the nature of postoperative pain - mild, moderate, and severe - after 48 h
