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.
Change in position of the hip head with respect to the postoperative situation in X-direction (perpendicular to the hip–stem axis) and Y-direction (along the hip–stem axis), for 1, 2, 5, and 8 years’ postoperative follow-ups. The ellipse presents the 95% prediction interval of the head position change for each follow-up moment.
