Novel techniques demonstrate superior fixation of simple transverse patella fractures - A biomechanical study

A Modified Tension Band Fixation Technique for the Management of Patellar Fractures Using Crossed Pins and a Lateral Parapatellar Approach

“…Accordingly, a crossed pin configuration may confer a more rigid construct in patella fractures that could resist fragment displacement during flexion. Indeed, Lenihan et al demonstrated a significantly smaller fracture gap displacement with the use of crossed pins compared to conventional parallel ones [ 9 ]. It should be noted that the crossed pin technique does not contradict the AO principles since, according to AO, the resistance to displacement comes from the cerclage wire and not from the pins that act mainly as anchoring points.…”

“…Although a parallel k-wire configuration may achieve adequate compression on the posterior surface of the patella, some displacement will occur on the anterior surface. A recent biomechanical study has shown that a crossed k-wire configuration provides greater fixation stiffness under cyclic loading and improves interfragmentary compression compared to the traditional parallel one [ 9 ].…”

Progress on Kirschner wire insertion techniques for patellar fractures

“…The simultaneous action of wire, K-wires, and femoral condyle on the patella can convert the tension between the fracture fragments into the pressure between the fracture sites. This conversion helps prevent separation of fracture sites and safeguards the integrity of the articular surface [7][8][9]. The role of K-wires is paramount in tension band wiring, but K-wire placement has not been fully discussed.…”