Knee Spacers
Knee spacers are temporary implant devices used primarily during two-stage revision Total Knee Replacement procedures to manage severe joint infections and maintain proper knee alignment. Made from PMMA bone cement—often combined with antibiotics such as vancomycin or gentamicin—knee spacers deliver high local concentrations of antimicrobial agents directly to the infected joint, helping eliminate bacterial contamination while preserving soft-tissue tension.
Knee spacers come in two main forms: static spacers, which immobilize the knee to support healing in cases of extensive bone loss or instability, and articulating spacers, which allow controlled range of motion to improve mobility, reduce stiffness, and support faster rehabilitation. Their design ensures proper joint alignment and helps protect surrounding ligaments, tendons, and bone structures until the definitive prosthesis can be re-implanted. By combining mechanical support with targeted antibiotic delivery, knee spacers play a critical role in infection control and successful outcomes during complex revision arthroplasty.
