Abstracts from the 11th Annual Meeting of Arthroplasty Society In Asia (ASIA), the 4th Annual Meeting of the Malaysian Society for Hip and Knee Surgeons (MSHKS), and the 17th Annual Meeting of the ASEAN Arthroplasty Association (AAA)

ObjectiveTo evaluate the clinical efficacy of the parallel osteotomy combined with a "prosthetic spacer" in the treatment of Stage IV septic arthritis (SA) of the knee, and to provide a staged treatment strategy that effectively controls infection while maximizing joint function preservation.Methods A prospective analysis was conducted on 23 patients diagnosed with knee SA at the joint department of Xi'an Honghui Hospital from 2020.9 to 2023.9.All patients underwent parallel osteotomy with a "joint spacer", categorized into a prosthetic group (12 cases, using CR femoral condyles and tibial polyethylene liners) and a bone cement group (11 cases, using cement-molded spacers).operative time, blood loss, preoperative/postoperative pain VAS scores, postoperative KSS scores, range of motion (ROM), 1-year infection recurrence rates, and secondary surgery rate were recorded.Data were analyzed using SPSS 21.0 (P < 0.05 considered statistically significant) (Figs. 1 and2). ResultsThe prosthetic group demonstrated significant improvements in operative time, blood loss, postoperative VAS scores for pain, KSS scores, and ROM compared to the bone cement group (P < 0.05).Both groups achieved comparable infection control rates (P > 0.05), and the prosthetic group had a lower rate of secondary surgery (P < 0.05). ConclusionThe parallel osteotomy combined with a "prosthetic spacer" is a viable option for severe knee SA.This approach effectively controls infection and preserves joint function, warranting broader clinical adoption.Fig. 1 (Abstract O1).The specific operation process and steps of parallel osteotomy.In Fig. A, it can be seen that SAK has invaded the cartilage, and there is obvious joint destruction.Fig. B, self-made parallel osteotomy; Fig. C-E.Parallel osteotomy is used to make flexion and extension Spaces.Fig. F, complete effect of osteotomy