Bicruciate lesion biomechanics, Part 1-Diagnosis: translations over 15 mm at 90° of knee flexion are indicative of a complete tear.
Rogério Teixeira de CarvalhoCarlos Eduardo da Silveira FrancioziYasuo ItamiMichelle H McGarrySheila Jean McNeill InghamRene Jorge AbdallaJames Eugene TiboneThay Q LeePublished in: Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA (2018)
Both incomplete and complete BI led to an important AP translation instability at all angles; however, full extension was the most stable position at all injured models. Total antero-posterior translation at 90° of knee flexion over 15 mm, in comparison to the intact condition, was indicative of a complete BI. Since the appropriate assessment of a combined ACL and PCL lesion remains a challenge, this study intends to assist its diagnosis. As BI's main antero-posterior instability occurred at 90°, a total antero-posterior drawer test is proposed to evaluate BI in the clinical setting. Total antero-posterior translation at 90° > 15 mm, in comparison to the intact condition or the contra-lateral non-injured knee, can be used to identify a complete from an incomplete BI.