Comparative study of sensitivity and specificity of MRI versus GNRB to detect ACL complete and partial tears

Anterior cruciate ligament (ACL) tears are difficult to diagnose and treat (DeFranco). The preoperative clinical diagnosis of such injuries poses difficulties even in the hands of experienced surgeons. The importance of grading clinical laxity tests has been reported and the proper interpretation of the Lachman test could support the diagnosis of ACL tears. However, clinical examination is examiner dependent, and the inability to produce consistent and comparable results raises the need to use objective instrumented laxity methods and to quantify the amount of laxity, especially for diagnosis, carrying out postoperative follow-up, and comparing the efficacy of surgical procedures.