Preoperatively Predict the Minimum Autograft Length Necessary for Reconstructive Surgery of the Posterolateral Corner: A Cadaveric Study.

Abstract Background : The study aimed to find a correlation between the anthropometric values measurable on X-ray and the necessary length of the graft required for reconstructive surgery of lateral collateral structures-the modified LaPrade reconstruction surgery with single-point femoral fixation. Methods: The study included 25 cadaveric bodies, forty lower extremities. Standard anatomical dissection techniques were used. Chosen bone parameters were measured and on the identical lower limbs a reconstruction procedure was performed. Portions of the grafts were measured and statistically analysed. Results: An association between lateral femoral condyle distance and total graft length was found, allowing us to assemble a formula, which provides surgeons to calculate a minimal graft length needed for a complete LaPrade reconstruction surgery with a single-point femoral fixation modification. Conclusions: Our formula should help decide whether it is possible to use an autograft, where to take the autograft from, and possibly adjust the surgical technique accordingly. A great advantage of the formula is its use based on a preoperative X-ray image. Level of Evidence: II-III