Department of Orthopedics and Traumatology, Kocaeli University Hospital, TurkeyFulltext PDF
Background: This study aims to refine the biomechanical properties of a patented new Kirschnerwire locking and compressing implant called EFECE. Materials and Methods: EFECE implants are 5 mm in length, cylinder-shaped wire locking and compressing implants with an 8 mm radius and a hole for insertion of 1.2 mm Kirschner-wire. The EFECE implant contains two pieces that are attached to each other with threads. The top piece functions as a cap, while the second piece contains three gloves for the insertion of magnetically active three balls. The locking mechanism is applied with the help of the balls in the cone-shaped gloves. The locking strength of these implants is determined through the following methods: For group 1, distraction force is applied to the devices until failure is reached, and then maximum force and total extension at the time of failure are evaluated; for group 2, cyclic distraction forces are applied to the implants against cyclic loading, and then the presence of failure and the maximum extension in a cycle are evaluated. Findings: In group 1, the mean pull out strength was 920 Newton, and the mean extension was 5 mm. In group 2 there was no failure, and the mean maximum extension was 1.2 mm. Interpretation: EFECE implant holding power is sufficient for fracture stabilization. Our results show that these implants can be used for fracture fixation. The characteristics associated with this procedure (compression along Kirschner-wires, freedom from bone quality fixation, percutaneous surgical technique, and the use of magnets for implant removal) may change surgical daily practice in the near future.
Fracture fixation; Internal fixation; Bone wires; Kirschner-wires; Distraction force
Karadeniz E. A Presentation on EFECE: A New Locking and Compressing Device with Kirschner-Wire and a Preliminary Study for Biomechanical Evaluation of this System. Ann Trauma Acute Care. 2022;6(1):1030..