An Innovative Approach to Produce Silicone Mold-Based Antibiotic-Loaded Knee Spacer for Infected Knee Arthroplasty

This study aimed to evaluate the efficacy of antibiotic-loaded cement articulating spacers produced through a silicone mold in the two-stage revision of infected total knee arthroplasty. Five individuals were prospectively treated with 2-stage revision using spacers made by this mold. Clinical assessment was conducted during and after implantation using the WOMAC Score, Oxford knee score, and range of motion (ROM). The results showed that the ROM increased by an average of 35 degrees during the spacer stage, with an average ROM of 100 degrees. Furthermore, there was an average gain of 85.2 points in the Knee Society Score and an average rise of 22.8 points in the total WOMAC scores. This approach had a similar effect on improving infection, motion performance, and patients' satisfaction with metal articular molds but without high-technology equipment and low-cost price. Therefore, this method could be applied to any operating room that performs arthroplasty surgery.