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.
Graphs showing the mean and SE of normalized disc pressure in the center of disc at the L3-L4 (A) and L5-S1 (B) levels after arthroplasty with Activ L at L4-L5 under physiologic compressive follower preload. For the abbreviation, bending : right/left lateral bending; rotation : right/left axial rotation.
