The first DePuy ASR hip implant trial began on January 25^th in the California Superior Court in Los Angeles County. The case, Kransky v. DePuy, revolves around Loren Kransky, a 65-year old man who received a DePuy ASR hip implant in 2007 and was forced to undergo revision surgery just five years later, in 2012.

When the Stryker Rejuvenate hip implant was introduced it was considered quite innovative in design; the Rejuvenate was marketed in 2009 after gaining FDA approval in June, 2008. While traditional hip implant designs were manufactured with a one piece neck and stem, both the Rejuvenate and ABGII have a design which implements a variety of components. In fact, the ABGII hip implant has sixteen stems—including left and right sides, and ten different sizes of modular neck. Six stems and sixteen necks make up the Rejuvenate hip implant system. Marketing for the Rejuvenate claimed that this hip implant was designed specifically for the younger, more active patient who was currently experiencing limited mobility of their hip joint.