The modular components of the Stryker Rejuvenate consist of various head dimensions and modular neck orientations. These attach through a Morse taper, allowing for variability in leg length and offset. The Morse taper is a slightly angular junction on either end of the hip implant components which the surgeon taps into the stem until it is locked tightly.

When an item is galvanized the word refers to a process in which the item is covered with metal using a galvanic current or coating—usually of iron or steel with added zinc to protect it from rusting. The   process generally consists of hot dipping the metal into the coating in order to prevent corrosion and rusting. The Stryker Rejuvenate and ABGII are comprised of several different components which are selected according to the patient’s body type and level of activity.

Recipients of the Stryker recalled Rejuvenate or ABGII hip implants may have many questions relating to the damage one of the metals—chromium—can do to the human body. Both these Stryker models were recalled in July 2012 at which time Stryker cited the risk of fretting and corrosion, leading to the release of metal ions and a higher-than-normal failure rate.

Following the Stryker hip replacement recall in July, 2012, more questions have arisen regarding the formation of pseudotumors, metal poisoning and chromium and cobalt toxicity. Hip implant problems have rapidly become the rule rather than the exception, particularly among those with all-metal implants or implants such as the Rejuvenate and ABG II which have metal components. Research has indicated that pseudotumors are also much more likely among those with hip implants which contain chromium or cobalt. In one analysis, the only significant predictor for pseudotumors was serum cobalt levels above 5 µ/ml; patients with elevated cobalt levels were four times more likely to develop pseudotumors than those with lower levels after adjusting for age, gender, allergies and other factors.