Keywords: bilateral hip arthroplasty; bilateral joint arthroplasty; bilateral knee arthroplasty; cement particles; contaminated operating room; debridement, antibiotics, and implant retention (DAIR); drape changing; infection; instrument change; instrument contamination; open abdomen; operating room clothing; operating room issues; personal protection suits; reimplantation; sterile surgical vests; surgical drapes; surgical field; surgical instrument change; surgical instruments; surgical space suits; unsterile equipment.