Functional Outcome of Burk Schaffer's Approach for PCL Tibial Avulsion Fracture Fixed with Cancellous Screw

Abstract

Background: Posterior Cruciate Ligament (PCL) is the main posterior stabilizer of the knee. Injuries of the PCL are rare. Isolated PCL disruption most commonly occurs as avulsion at its tibial insertion as compared with its femoral origin or as a mid-substance tear. In PCL bony avulsion, fixation of the avulsed fragment with cancellous screw is a recommended procedure. Objective: To evaluate efficacy of Burk Schaffer's approach in treatment of PCL tibial avulsion fracture with cancellous screw and evaluation of functional results according to Tegner Lysholm score. Material and Methods: We included 30 patients (Male 26 and Female 4) operated for isolated PCL avulsion from tibia during the period from 2015 to 2017. Patients were evaluated clinically by posterior drawer test, radiologically by X-ray and using functional scale of Tegner-Lysholm. MRI was advised for suspected other ligaments and meniscal injuries. All cases were operated with 4mm cannulated screw fixation by Burk and Schaffer approach. Results: Mean Tegner Lysholm score of 30 patients was 95.37 after 6 months of surgery, which was excellent. After 3 months 75% has grade 0 posterior drawer test, 12.5% has grade 1 and 12.5% has grade 2 laxity. Conclusion: Approach by Burk and Schaffer is safer and easier than the classical one. Open reduction and fixation with cannulated screw for tibial avulsion of PCL gives good functional outcome.