Biomechanical characteristics of the normal medial and lateral porcine knee menisci

The purpose of this investigation was to examine the compressive properties of the porcine meniscus at a variety of topographical locations using a creep indentation experiment. Three different solution techniques were used to analyse the creep response of the tissue. Specifically, the indentation stiffness, aggregate modulus, permeability, Poisson's ratio, and shear modulus were determined at six different testing locations (anterior, central, and posterior regions; femoral and tibial sides) of both the medial and lateral porcine menisci. Results indicate topographical variations among the testing locations, with the femoral-anterior portion of the medial meniscus having the highest indentation stiffness (350 +/- 110 kPa), aggregate modulus (270 +/- 90 kPa), and shear modulus (140 +/- 40 kPa). The tibial-posterior region of the medial meniscus exhibited the lowest indentation stiffness (170 +/- 40 kPa), aggregate modulus (130 +/- 30 kPa), and shear modulus (60 +/- 20 kPa). No statistical differences were found at the six tested locations of the lateral meniscus.