Joint replacement surgery has become all too common nowadays. Modern joint implants restore pain-free mobility of patients with chronic degenerative joint disease thereby drastically enhancing their quality of life. To ensure long-term mechanical stability artificial joints are made from materials containing a range of different metal alloys. A crucial factor in determining an implant's long-term effectiveness however is its integration into the surrounding bone tissue. Using highly complex analytical techniques a group of researchers from Charité -- Universitätsmedizin Berlin were able to observe in detail how different metals are released from joint implants and accumulate in the surrounding bone tissue.