Figure 7. Torsion test curves of smooth surface (SS) and roughened surface (RS) screws at (A and B) 6 weeks and (C and D) 12 weeks.
Black arrows indicate where the RS fractured in relation to the stress.
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.