Date of download: 10/26/2017 Copyright © ASME. All rights reserved. From: The Acute Effect of Bipolar Radiofrequency Energy Thermal Chondroplasty on Intrinsic Biomechanical Properties and Thickness of Chondromalacic Human Articular Cartilage J Biomech Eng. 2012;134(8):081007-081007-7. doi:10.1115/1.4007105 Figure Legend: Compressive indentation relaxation testing was performed on a custom-built stepper-motor driven mechanical testing system. A specimen stage was used to clamp the specimen while a spherical indenter interfacing with a load cell was displaced into cartilage immersed in a saline bath.