Primary Fixation and Cyclic Performance of Single-Stitch All-Inside and Inside-Out Meniscal Devices for Repairing Vertical Longitudinal Meniscal Tears

All-inside devices provide a higher initial load on the meniscal repair than inside-out fixation, and stiffer constructs show higher resistance against gap formation during cyclic loading. All-inside repair demonstrated significantly higher primary fixation strength than inside-out repair. The significantly highest load and relief displacement were for the knotless soft anchoring FiberStich group. Overall, the primary fixation strength of inside-out meniscal repair was significantly lower than all-inside repair in this cadaveric tissue model. Although absolute differences among groups were small, meniscal repairs with higher construct stiffness demonstrated increased resistance against gap formation and failure load.