A range of resorbable interference screws for knee ligamentoplasty CROSS lig interference screws are injected into the Duosorb® composite material, made of ß tricalcium phosphate ceramic and DL-polylactic acid. This osteoconductive material, which has a mode of action that is similar to that of bone substitutes, has been specially designed : to make resorbable implants for intra-osseus areas; for use in conditions of high biomechanical resistance to flexion and compression constraints depending on the tricalcium phosphate load.