Abstract: Objective：To explore the clinical efficacy of arthroscopic single bone tunnel with double endobuttons fixation for the treatment of tibial posterior cruciate ligament avulsion fracture.Methods：A retrospective analysis of 22 patients with tibial posterior cruciate ligament avulsion fracture who met the selection criteria between January 2013 to January 2018 were made.Surgery were treated with arthroscopic single bone tunnel with double endobuttons fixation.The preoperative and postoperative maximum displacement of the sagittal CT fracture block,knee laxity,International Knee Documentation Committee(IKDC) grading,Visual Analogue Score(VAS),Lysholm score and the angle of knee flexion were compared.Results：All incisions healed by first intention without complications.The maximum displacement of the sagittal CT fracture block was (1.5±0.6)mm after operation,which was significantly improved when compared with that before operation(P<0.05).All patients were followed up,and Xray showed fracture healed at 3 months after operation,and the last followup time was 24 months.All patients showed negative knee laxity and IKDC grade A at 24 months after operation,which was significantly improved when compared with that before operation(P<0.05).VAS score was(0.1±0.3),Lysholm score was(96.1±4.3),and the angle of knee flexion was(129.3±6.4)°at 24 months after operation,which were significantly improved when compared with those before operation(P<0.05).Conclusion：Arthroscopic single bone tunnel with double Endobuttons fixation for the treatment of tibial posterior cruciate ligament avulsion fracture can significantly improve postoperative pain and restore knee function.

Key words: arthroscopy, posterior cruciate ligament, avulsion fracture, Endobutton, single bone tunnel