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.
Endoscopic endonasal surgical training with 3D printed model. (A) An egg was secured at the special sellar base. The endoscope and endoscopic tools were passed through the nostrils, respectively. (B-D) The tools were used to finish drilling of the shell (B), curetting and biting of the shell to further enlarge area of shell removal (C), and aspirating off egg white (D).
