Antibiotic-impregnated joint spacers have emerged as more than a stopgap in the management of periprosthetic joint infection. In two-stage exchange protocols, these spacers deliver high local antibiotic concentrations while preserving limb length and soft-tissue tension. Yet their value goes beyond infection suppression: spacer design influences clearance of infection, facilitates early reimplantation planning, and even shapes early functional rehabilitation. The field is moving from generic cement mixes to patient-tailored solutions-balancing elution kinetics, mechanical stability, and the spectrum of pathogens encountered in contemporary practice. As resistance patterns evolve, the choice of antibiotic and carrier must be made with microbiology insight and surgical pragmatism.
Optimization hinges on several levers: antibiotic selection and dosing, cement type and porosity, and the interplay between elution and spacer integrity. Clinicians increasingly favor combinations that maximize local concentrations without compromising spacer strength or posing systemic toxicity. We also see a trend toward custom, intraoperative mixing versus preformed products, plus hybrid spacers that combine static and mobile elements to allow partial mobility. The outcomes hinge on multidisciplinary coordination-infectious disease guidance, pharmacokinetics, and surgical technique-yet the real-world challenges persist: cost, logistics, and the lack of universal protocols across institutions.
Looking ahead, the next wave may unite materials science with data-driven care: antibiotic-loaded bioresorbable carriers, modular spacer systems, and, potentially, 3D-printed, patient-specific geometries. Standardizing reporting metrics-time to reimplantation, infection recurrence, and functional scores-will sharpen comparisons and drive value-based decisions. This topic invites a robust peer dialogue: what antibiotics and spacers have delivered your best infection control with acceptable limb function? What trade-offs have you accepted, and how are you measuring success in your programs?
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