Bone Growth at 12 Weeks (VIDEO) University of Pennsylvania School of Medicine This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption 3D reconstructions of regenerated bone at week 12 in stiff, early, or delayed loading conditions, respectively. Credit Joel Boerckel Usage Restrictions Credit as specific. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.