A BIOMECHANICAL COMPARISON OF MATCHED FOUR-STRAND AND FIVE-STRAND SEMITENDINOSUS-GRACILIS GRAFTS

ABSTRACT Introduction: Recent studies have shown that the likelihood of semitendinosus-gracilis graft rupture is inversely correlated to its diameter. A can be prepared in a five-strand or four-strand fashion increase However, biomechanical superiority grafts still under debate. Objective: This study aimed evaluate characteristics matched and human grafts. Methods: We evaluated tendons harvested from ten fresh male female cadavers, aged 18-60 years. Four-strand were with fixed wooden tunnels interference screws. Each was submitted axial traction at 20 mm/min until rupture; tests donor matched. Data recorded real time included analysis area, diameter, force, maximum deformation stiffness Results: The area tunnel size significantly greater than There no significant differences properties. diameter positively stiffness, elasticity. correlation between force failure, tension. Conclusion: Five-strand hamstring In this model using screw fixation, increases an decrease Level evidence V; study.