Abstract:Objective To explore the clinical efficacy of arthroscopic technique combined with nail-in-nail system for total internal repair of intra-articular fracture of calcaneus.Method A retrospective analysis was conducted on the clinical data of 31 patients with closed intra-articular fracture of calcaneus from May 2021 to April 2024 and were followed up. All adopted the treatment plan of arthroscopic technique combined with the nail-in-nail system for total internal repair surgery. Axial X-ray films of the calcaneus side and CT examinations of the foot were performed both before and after the operation. The fracture types were classified based on the imaging results, and the fracture reduction after the operation was evaluated. Compare calcaneal height, width, Bohler angle, and Gissane angle before and after surgery. Perioperative related indicators such as preoperative waiting time, operation duration, intraoperative blood loss, total hospital stay, postoperative pain visual analogue score (VAS) score and postoperative complications were recorded. The clinical efficacy was evaluated by using the American Orthopaedic Foot and Ankle Society (AOFAS) score and Maryland foot score.Results Postoperative imaging examination showed that the articular surface collapsed bone was reduced after calcaneus surgery. The calcaneus height was significantly higher than that before surgery, the calcaneus width was significantly narrower than that before surgery, the Bohler angle was significantly larger than that before surgery, and the Gissane angle was significantly smaller than that before surgery, and the differences were statistically significant, P < 0.05. The preoperative waiting time was 6 (4,7) d, the operation time was (188.77 ± 39.53) min, the intraoperative blood loss was (59.03 ± 23.00) mL, the hospital stay was (16.49 ± 4.04) d, the postoperative pain VAS score was 2 (1, 2) points, the AOFAS score was 92 (90, 95) points, and the Maryland score was 92 (90, 95) points.Conclusion The total internal repair of fracture of calcaneus using arthroscopic technology combined with the nail-in-nail system has the advantages of early surgical intervention, minimal trauma, direct visual reduction, reliable fixation, and no incision-related complications. It is suitable for Sanders type II and III fracture of calcaneus. It is worth applying in clinical practice.