Although the Stryker ABGII and the Rejuvenate are not “true” metal-on-metal hip implants in that they do not implement a femoral head and acetabular cup, the necks are nonetheless manufactured of cobalt and chromium and the stems are titanium coated. The design is known as a modular design and gives surgeons additional options during implantation to fit the hip implant to the patient’s specific anatomy. Additionally, there is a metal-on-metal neck juncture and metal trunnions located on either end of the neck. This means that the ABGII has many of the same risks of metallosis and metal toxicity as other metal-on-metal hip implants. Both the ABGII and the Rejuvenate were recalled in July of 2012, after an urgent safety alert was issued to hospitals and surgeons just three months earlier advising them of potential risk factors.